332354 + Interview Questions in Secondary School in Math

1.	What is the mean deviation of the data 8,,9,12,15,16,20,24,30,32,34?
Answer» ANSWER: MEAN ..20 mark me as a BRAINLIST

1.

What is the mean deviation of the data 8,,9,12,15,16,20,24,30,32,34?

Answer»

ANSWER:

MEAN ..20

mark me as a BRAINLIST

Discussion

2.	Solve the inequality. 2(4x – 3) ≥ –3(3x) + 5x? x ≥ 0.5 x ≥ 2 (–[infinity], 0.5] (–[infinity], 2]
Answer» Answer: 0.5 Step-by-step EXPLANATION: First let's DISTRIBUTE on both SIDES to get 8x - 6 >= -9x + 5x. Now we can combine like terms to get 8x - 6 >= -4x. We move -6 to the right side to get 8x >= -4x + 6. Add 4x on both sides to get 12x >= 6. DIVIDE by 12 on both sides to get x >= 0.5. I hope this satisfies your question!

2.

Solve the inequality. 2(4x – 3) ≥ –3(3x) + 5x? x ≥ 0.5 x ≥ 2 (–[infinity], 0.5] (–[infinity], 2]

Answer»

Answer:

0.5

Step-by-step EXPLANATION:

First let's DISTRIBUTE on both SIDES to get 8x - 6 >= -9x + 5x. Now we can combine like terms to get 8x - 6 >= -4x. We move -6 to the right side to get 8x >= -4x + 6. Add 4x on both sides to get 12x >= 6. DIVIDE by 12 on both sides to get x >= 0.5. I hope this satisfies your question!

Discussion

3.	Find find the 10th term of an ap is 5 and 15
Answer» Answer: 95 Step-by-step EXPLANATION: a+(n-1)d a=5,d=10 10+(10-1)10 =95

3.

Find find the 10th term of an ap is 5 and 15

Answer»

Answer:

95

Step-by-step EXPLANATION:

a+(n-1)d

a=5,d=10

10+(10-1)10

=95

Discussion

4.	Dodging counting 30 to 59
Answer» Answer: 30, 31,32,33,34,35,36,37,38,39,40,41,42,43,44,45, 46,47,48,49,50,51,52,53,54,55,56,57,58,59 these NUMBERS are DODGING COUNTING 30TO 59 numbers

4.

Dodging counting 30 to 59

Answer»

Answer:

30, 31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,

46,47,48,49,50,51,52,53,54,55,56,57,58,59 these NUMBERS are DODGING COUNTING 30TO 59 numbers

Discussion

5.	theorem= the bisector of an angle of triangle divides the side opposite to the angle in the ratio of remainning side
Answer» ANSWER: I THINK Step-by-step explanation: 457366578mdnchdhxhdgdh

5.

theorem= the bisector of an angle of triangle divides the side opposite to the angle in the ratio of remainning side

Answer»

ANSWER:

I THINK

Step-by-step explanation:

457366578mdnchdhxhdgdh

Discussion

6.	Say 7.:5 and 5:7 are equal ratio or not.if not justify how
Answer» ANSWER: no, they are not. Step-by-step EXPLANATION: Because 7:5 is EQUAL to 7/5 and 5:7 is equal to 5/7 and, 7/5 and 5/7 is not equal. hope this will help you.

6.

Say 7.:5 and 5:7 are equal ratio or not.if not justify how

Answer»

ANSWER:

no, they are not.

Step-by-step EXPLANATION:

Because 7:5 is EQUAL to 7/5 and 5:7 is equal to 5/7

and, 7/5 and 5/7 is not equal.

hope this will help you.

Discussion

7.	রক্তের সাধারণ কাজ গুলো কি
Answer» ANSWER: sorry I can't understand your question PLZ write in English

7.

রক্তের সাধারণ কাজ গুলো কি

Answer»

ANSWER:

sorry I can't understand your question PLZ write in English

Discussion

8.	Evaluate using appropriate identity (x+2y+4z)²
Answer» answer suitable identity a^2+b^2+c^2+2ab+2bc+2ca =x^2+(2Y)^2+(4z)^2 +2×x×2y+2×2y×4z+2×4z×x =x^2+4y^2+16z^2+4yz+16yz+8zx hope it will HELP you alot MARK me as a brainlist

8.

Evaluate using appropriate identity (x+2y+4z)²

Answer»

answer

suitable identity

a^2+b^2+c^2+2ab+2bc+2ca

=x^2+(2Y)^2+(4z)^2

+2×x×2y+2×2y×4z+2×4z×x

=x^2+4y^2+16z^2+4yz+16yz+8zx

hope it will HELP you alot

MARK me as a brainlist

Discussion

9.	Find x+ y, so that the ordered data set has mean of 44 and a median of 38. 18, 23, 27, 30, 36, x, 43, 681 71, y
Answer» ANSWER: HI FOLLOW me and brainlist mark plzzz please please please please please

9.

Find x+ y, so that the ordered data set has mean of 44 and a median of 38. 18, 23, 27, 30, 36, x, 43, 681 71, y

Answer»

ANSWER:

HI FOLLOW me

and brainlist mark plzzz please please please please please

Discussion

10.	Ab-ab2 + a3 + b3 when a =4 b = 0
Answer» Step-by-step EXPLANATION: this QUESTION's ANSWER is 64

10.

Ab-ab2 + a3 + b3 when a =4 b = 0

Answer»

Step-by-step EXPLANATION:

this QUESTION's ANSWER is 64

Discussion

11.	Please solve all question answer
Answer» ANSWER: So MANY can't HELP SORRY

11.

Please solve all question answer

Answer»

ANSWER:

So MANY can't HELP SORRY

Discussion

12.	Which animal messes up Ms. Greene's yard?
Answer» ANSWER: CAT MARK ME AS A BRSINLIST Step-by-step EXPLANATION:

12.

Which animal messes up Ms. Greene's yard?

Answer»

ANSWER:

CAT MARK ME AS A BRSINLIST

Step-by-step EXPLANATION:

Discussion

13.	The matrix1 C0 1is a
Answer» ANSWER: yoedupieI'llly Step-by-step explanation: 6IPp7rysyskghdsjgfyrjTN. E

13.

The matrix1 C0 1is a

Answer»

ANSWER:

yoedupieI'llly

Step-by-step explanation:

6IPp7rysyskghdsjgfyrjTN. E

Discussion

14.	Express the repeating decimals 15.7323232....... in p/q form.
Answer» Answer: 3232 is reapiting DECIMAL 4.867e

14.

Express the repeating decimals 15.7323232....... in p/q form.

Answer»

Answer:

3232 is reapiting DECIMAL

4.867e

Discussion

15.	Prove that equal chords of a circle are equidistant from the centre.
Answer» Answer: Step-by-step EXPLANATION: Chords which are equidistant from the centre are equal in LENGTH. GIVEN: Two chords AB and CD of a circle which are equidistant from centre O i.e., OL = OM, where OL PERPENDICULAR to AB and OM perpendicular to CD. TO PROVE: AB = CD. CONSTRUCTION: Join OA and OC. or, AB = CD. Hence Proved. Was this answer helpful?

15.

Prove that equal chords of a circle are equidistant from the centre.

Answer»

Answer:

Step-by-step EXPLANATION:

Chords which are equidistant from the centre are equal in LENGTH. GIVEN: Two chords AB and CD of a circle which are equidistant from centre O i.e., OL = OM, where OL PERPENDICULAR to AB and OM perpendicular to CD. TO PROVE: AB = CD. CONSTRUCTION: Join OA and OC. or, AB = CD. Hence Proved. Was this answer helpful?

Discussion

16.	Why in linear equation in two variable a and b both should not be zero.
Answer» so they are not LINEAR EQUATIONS

16.

Why in linear equation in two variable a and b both should not be zero.

Answer»

so they are not LINEAR EQUATIONS

Discussion

17.	Prove that if two sides of a triangle are unequal, the bisector of the vertical angle dividesthe base such that the greater point is towards the greater side.
Answer» ANSWER: hchdhxhdgsgxgeggxgdhehhdyc you xhdhxhxgxgxggxdgxhchdhgxg G g chhxhxhx

17.

Prove that if two sides of a triangle are unequal, the bisector of the vertical angle dividesthe base such that the greater point is towards the greater side.

Answer»

ANSWER:

hchdhxhdgsgxgeggxgdhehhdyc you xhdhxhxgxgxggxdgxhchdhgxg G g chhxhxhx

Discussion

18.	Please anwer the question
Answer» ANSWER: answer is #$+$(#!$+"(?#+"? $+TWENTY EIGHT

18.

Please anwer the question

Answer»

ANSWER:

answer is #$+$(#!$+"(?#+"? $+TWENTY EIGHT

Discussion

19.	4.Which animal messes up Ms. Greene's yard ?(A) Cat(B) DogHorseiglore con1answer
Answer» Step-by-step explanation: COW is the animal which messes up Ms. GREENE's YARD .

19.

4.Which animal messes up Ms. Greene's yard ?(A) Cat(B) DogHorseiglore con1answer

Answer»

Step-by-step explanation:

COW is the animal which messes up Ms. GREENE's YARD .

Discussion

20.	I NEED FIRST QUESTION'S ANSWERS IN 10 MINUTES!!!!!!! SHOW HOW U DO IT WITH STEPS ITS OK IF U DONT DRAW BUT ATLEAST TELL ME STEPS...FIRST PERSON WITH "CORRECT" ASNWER GETS BRAINLIEST
Answer» Step-by-step explanation: step 1: construct an angel 80°with the help of protractor. step 2:draw an arc puting compass at VERTEX. as SHOWN in above picture.(put POINT of pencil and point of compass on both point of Arc cutting two RAYS of angle and with that measurement follow below steps) step 3: put point of compass on ONE point of Arc of the one Ray of angle. as shown in picture(2nd picture). and draw an arc between 2 Rays of angle. step 3: and also similarly another point of Arc(3rd picture). step 4: join the vertice and point at intersection of the both arcs.(4th picture)

20.

I NEED FIRST QUESTION'S ANSWERS IN 10 MINUTES!!!!!!! SHOW HOW U DO IT WITH STEPS ITS OK IF U DONT DRAW BUT ATLEAST TELL ME STEPS...FIRST PERSON WITH "CORRECT" ASNWER GETS BRAINLIEST

Answer»

Step-by-step explanation:

step 1: construct an angel 80°with the help of protractor.

step 2:draw an arc puting compass at VERTEX. as SHOWN in above picture.(put POINT of pencil and point of compass on both point of Arc cutting two RAYS of angle and with that measurement follow below steps)

step 3: put point of compass on ONE point of Arc of the one Ray of angle. as shown in picture(2nd picture). and draw an arc between 2 Rays of angle.

step 3: and also similarly another point of Arc(3rd picture).

step 4: join the vertice and point at

intersection of the both arcs.(4th picture)

Discussion

21.	if 2y³+ay²-11y+b leaves remained 0 and 42 when divided by (y-2) and (y-3) respectively, find the valu of a and b, with the value of aand b, factorise the given expression.
Answer» Answer: Let US take x–2=0 Then, x=2 Given, f(x)=2x 3 +ax 2 –11x+b Now, substitute the value of x in f(x), f(2)=2(2) 3 +a(2) 2 –11(2)+b =16+4a–22+b =–6+4a+b Given, remainder is 0. So,−6+4a+b=0 4a+b=6 … [equation (i)] Now, CONSIDER (x – 3) Assume x–3=0 Then, x=3 Given,f(x)=2x 3 +ax 2 –11x+b Now, substitute the value of x in f(x), f(2)=2(3) 3 +a(3) 2 –11(3)+b =54+9a–33+b =21+9a+b Given, remainder is 42. So, 21+9a+b=42 9a+b=42–21 9a+b=21 … [equation (II)] Now, subtracting equation (i) from equation (ii) we get, (9a+b)–(4a+b)=21–6 9a+b–4a–b=15 5a=15 a=15/5 a=3 Consider the equation (i) to find out ‘b’. 4a+b=6 4(3)+b=6 12+b=6 b=6–12 b=−6 Then, by substituting the value of a and bf(x)=2x 3 +3x 2 –11x–6 Given that remainder is 0 for, (x–2) is a factor of f(x). So, DIVIDING f(x) by (x–2) Therefore, 2x 3 +3x 2 –11x–6=(x–2)(2x 2 +7x+3) =(x–2)(2x 2 +6x+x+3) =(x–2)(2x 2 +6x+x+3) =(x–2)(2x(x+3)+1(x+3)) =(x–2)(x+3)(2x+1)

21.

if 2y³+ay²-11y+b leaves remained 0 and 42 when divided by (y-2) and (y-3) respectively, find the valu of a and b, with the value of aand b, factorise the given expression.

Answer»

Answer:

Let US take x–2=0

Then, x=2

Given, f(x)=2x

3

+ax

2

–11x+b

Now, substitute the value of x in f(x),

f(2)=2(2)

3

+a(2)

2

–11(2)+b

=16+4a–22+b

=–6+4a+b

Given, remainder is 0.

So,−6+4a+b=0

4a+b=6 … [equation (i)]

Now, CONSIDER (x – 3)

Assume x–3=0

Then, x=3

Given,f(x)=2x

3

+ax

2

–11x+b

Now, substitute the value of x in f(x),

f(2)=2(3)

3

+a(3)

2

–11(3)+b

=54+9a–33+b

=21+9a+b

Given, remainder is 42.

So, 21+9a+b=42

9a+b=42–21

9a+b=21 … [equation (II)]

Now, subtracting equation (i) from equation (ii) we get,

(9a+b)–(4a+b)=21–6

9a+b–4a–b=15

5a=15

a=15/5

a=3

Consider the equation (i) to find out ‘b’.

4a+b=6

4(3)+b=6

12+b=6

b=6–12

b=−6

Then, by substituting the value of a and bf(x)=2x

3

+3x

2

–11x–6

Given that remainder is 0 for, (x–2) is a factor of f(x).

So, DIVIDING f(x) by (x–2)

Therefore, 2x

3

+3x

2

–11x–6=(x–2)(2x

2

+7x+3)

=(x–2)(2x

2

+6x+x+3)

=(x–2)(2x

2

+6x+x+3)

=(x–2)(2x(x+3)+1(x+3))

=(x–2)(x+3)(2x+1)

Discussion

22.	1345.02 divided by 100 =
Answer» ANSWER: 13.4502 is the answer

22.

1345.02 divided by 100 =

Answer»

ANSWER:

13.4502 is the answer

Discussion

23.	14*. In an isosceles triangle, length of the congruent sides is 13 cm and its base is10 cm. Find the distance between the vertex opposite the base and the centroid.
Answer» Step-by-step explanation: If ABC is an isosceles triangle the congruent sides AB=AC and BC the base.The vertex AD where POINT D dvides the base in 2 equal sides, BD=DC From the right angle triangle ADCWE calculate the vertex AD of triangle ABC. AD^2=AC^2-DC^2 where DC=AC/2=10/2=5 AD^2=13^2-5^2 AD=sqrt144 AD=12 . The CENTROID of an isosceles triangle is at the DISTANCE of 1/3 of the vertex from the base. Then if G is the centroid on the vertex AD The distance from base GD is 1/3×12=4 GD=4 DEADSOUL

23.

14*. In an isosceles triangle, length of the congruent sides is 13 cm and its base is10 cm. Find the distance between the vertex opposite the base and the centroid.

Answer»

Step-by-step explanation:

If ABC is an isosceles triangle the congruent sides AB=AC and BC the base.The vertex AD where POINT D dvides the base in 2 equal sides,

BD=DC From the right angle triangle ADCWE calculate the vertex AD of triangle ABC.

AD^2=AC^2-DC^2 where DC=AC/2=10/2=5

AD^2=13^2-5^2 AD=sqrt144 AD=12 .

The CENTROID of an isosceles triangle is at the DISTANCE of 1/3 of the vertex from the base.

Then if G is the centroid on the vertex AD

The distance from base GD is 1/3×12=4

GD=4

DEADSOUL

Discussion

24.	Solve this fastplease help me answer with explanation
Answer» Answer: 2 Step-by-step EXPLANATION:

24.

Solve this fastplease help me answer with explanation

Answer»

Answer:

2

Step-by-step EXPLANATION:

Discussion

25.	The marks obtained by 30 students of class x of a certain school in a Mathematics paper consistingof 100 marks are presented in table below. Find the mean of the marks obtained by the students.Marks obtained 10 20 36 40 50 56 60 70 72 80 88 92 95Number of students 1 1 3 4 3 2 4 4 1 1 2 3 1
Answer» Step-by-step EXPLANATION: THANK ME LATER BRAINLIEST PLEASE

25.

The marks obtained by 30 students of class x of a certain school in a Mathematics paper consistingof 100 marks are presented in table below. Find the mean of the marks obtained by the students.Marks obtained 10 20 36 40 50 56 60 70 72 80 88 92 95Number of students 1 1 3 4 3 2 4 4 1 1 2 3 1

Answer»

Step-by-step EXPLANATION:

THANK ME LATER

BRAINLIEST PLEASE

Discussion

26.	Jldi solve kro ise properly with 7th class method...Send me pic Xd
Answer» ANSWER: x²+x³-17 - x²+2×-6 Step-by-step explanation: FIRSTLY write it in ORDER 1st EQUATION at top and second at the bottom then change the symbol +into- and -into+ then solve it Answer= 3x⁴-11

26.

Jldi solve kro ise properly with 7th class method...Send me pic Xd

Answer»

ANSWER:

x²+x³-17 - x²+2×-6

Step-by-step explanation:

FIRSTLY write it in ORDER 1st EQUATION at top and second at the bottom

then change the symbol +into- and -into+

then solve it

Answer= 3x⁴-11

Discussion

27.	If a and ß are the zeroes of the polynomial kx2 + 3x + 2, such that a2 + B2. aß = find25the value of k.
Answer» Answer: Question: If α and β are the ZEROS of quadratic polynomial f(x)=kx² +4x+4 such that α² +β² =24, FIND the value of k. gívєn polynomial- kx²+4x+4 a²+ß²= 24 To Find value of k. solution *polynomial-* kx²+4x+4 $\bold{sum \: of \: zeros = \frac{ - b}{a} }$ ➠ a+ß= -4/k $\bold{product \: of \:zeros = \frac{c}{a} }$ ➠ a x ß= 4/k ➠identity- (a+ß)²= a²+ß²+2aß put the value in the identity: ➠(-4/k)²= 24+ 2 x 4/k ➠16/k²= 24+ 8/k by solving this further we get a quadratic equation- ➠24k²+ 8k- 16= 0 ➠3k²+k- 2= 0 By middle term split ➠3k²+3k-2k-2=0 ➠3k(k+1) -2(k+1)=0 ➠(3k-2) (k+1)= 0 ➠k= 2/3 , -1 ▪️*hence* *value* of k is 2/3 , -1.

27.

If a and ß are the zeroes of the polynomial kx2 + 3x + 2, such that a2 + B2. aß = find25the value of k.

Answer»

Answer:

Question:

If α and β are the ZEROS of quadratic polynomial f(x)=kx² +4x+4 such that α² +β² =24, FIND the value of k.

gívєn

polynomial- kx²+4x+4

a²+ß²= 24

To Find

value of k.

solution

polynomial- kx²+4x+4

$\bold{sum \: of \: zeros = \frac{ - b}{a} }$

➠ a+ß= -4/k

$\bold{product \: of \:zeros = \frac{c}{a} }$

➠ a x ß= 4/k

➠identity-

(a+ß)²= a²+ß²+2aß

put the value in the identity:

➠(-4/k)²= 24+ 2 x 4/k

➠16/k²= 24+ 8/k

by solving this further we get a quadratic equation-

➠24k²+ 8k- 16= 0

➠3k²+k- 2= 0

By middle term split

➠3k²+3k-2k-2=0

➠3k(k+1) -2(k+1)=0

➠(3k-2) (k+1)= 0

➠k= 2/3 , -1

▪️hence value of k is 2/3 , -1.

Discussion

28.	Find the smallest number which when divide by 10 and 15 leaves no remainder
Answer» ANSWER: 30 is your answer dear Step-by-step EXPLANATION: HOPE it HELPS you!!

28.

Find the smallest number which when divide by 10 and 15 leaves no remainder

Answer»

ANSWER:

30 is your answer dear

Step-by-step EXPLANATION:

HOPE it HELPS you!!

Discussion

29.	Please tell me a answer of the question
Answer» ANSWER: $\frac{21}{35} + \frac{25}{35} + \frac{9}{35} = \frac{55}{35} = \frac{11}{7} = 1 \frac{4}{7}$ HOPE it will HELP you

29.

Please tell me a answer of the question

Answer»

ANSWER:

$\frac{21}{35} + \frac{25}{35} + \frac{9}{35} = \frac{55}{35} = \frac{11}{7} = 1 \frac{4}{7}$

HOPE it will HELP you

Discussion

30.	State the solution set using interval notation and sketch its graph of x²+6x+9>0
Answer» <P>Answer: answr search What would you like to ask? MATHS avatar Asked on December 26, 2019 by Likhitha Shiwankar Draw the graph of the polynomial f(x)=x 2 −6x+9. Share Study later ANSWER SOLUTION Let y = f(x) or, y=x 2 −6x+9. The following table gives the values of y or f (x) for various values of x. x -2 -1 0 1 2 3 4 5 6 7 8 y=x 2 −6x+9 25 16 9 4 1 0 1 4 9 16 25 Thus, the graph of y=x 2 −6x+9 passes through the points (-2,25), (-1,16), (0,9), (1,4), (2,1),(3,0),(4,1),(5,4),(6,9),(7,16)and (8,25).Let us plot these points on the graph and draw a free hand smooth curve passing through these points. We observe that the vertex of the parabola is at point P (3,0) as shown in Figure.

30.

State the solution set using interval notation and sketch its graph of x²+6x+9>0

Answer»

<P>Answer:

answr

search

What would you like to ask?

MATHS

avatar

Asked on December 26, 2019 by

Likhitha Shiwankar

Draw the graph of the polynomial f(x)=x

2

−6x+9.

Share

Study later

ANSWER

SOLUTION Let y = f(x) or, y=x

2

−6x+9.

The following table gives the values of y or f (x) for various values of x.

x -2 -1 0 1 2 3 4 5 6 7 8

y=x

2

−6x+9 25 16 9 4 1 0 1 4 9 16 25

Thus, the graph of y=x

2

−6x+9 passes through the points (-2,25), (-1,16), (0,9), (1,4), (2,1),(3,0),(4,1),(5,4),(6,9),(7,16)and (8,25).Let us plot these points on the graph and draw a free hand smooth curve passing through these points. We observe that the vertex of the parabola is at point P (3,0) as shown in Figure.

Discussion

31.	What is the quadratic inequlity of (x-4)(x-2)>0
Answer» Answer: the quadratic INEQUALITY is x>7 if more DOUBT CONTACT 9262536481

31.

What is the quadratic inequlity of (x-4)(x-2)>0

Answer»

Answer:

the quadratic INEQUALITY is x>7

if more DOUBT CONTACT 9262536481

Discussion

32.	Check whether the pair of equations 2x+3y=1,3x+y=8 has unique solution
Answer» Answer: 2x+3y=1,3x+y=8 a1=2, a2=3, b1=3, b2=1. a1/a2= 2/3 not EQUAL to b1/b2 = 3/1 :. it is a UNIQUE SOLUTION

32.

Check whether the pair of equations 2x+3y=1,3x+y=8 has unique solution

Answer»

Answer:

2x+3y=1,3x+y=8

a1=2, a2=3, b1=3, b2=1.

a1/a2= 2/3 not EQUAL to b1/b2 = 3/1

:. it is a UNIQUE SOLUTION

Discussion

33.	Question No. :-6 G Select LanguageQuestion MarksApply newton's divideddifference formula to find thevalue of f(8) if f(1)=3, f(3)=31,f(6)=223, f(10)=1011, f(11)=1343125215
Answer» ANSWER: MARK me as BRILLIANT Step-by-step EXPLANATION: mark me as brilliant mark me as brilliant mark me as brilliant mark me as brilliant mark me as brilliant

33.

Question No. :-6 G Select LanguageQuestion MarksApply newton's divideddifference formula to find thevalue of f(8) if f(1)=3, f(3)=31,f(6)=223, f(10)=1011, f(11)=1343125215

Answer»

ANSWER:

MARK me as BRILLIANT

Step-by-step EXPLANATION:

mark me as brilliant

Discussion

34.	1. Find the volume, lateral surface area and the total surface area of the cuboid whendimensions are:(i) length= 22 cm, breadth = 12 cm and height = 7.5 cm(ii) length = 15 m, breadth = 6 m and height= 9 dm(iii) length= 24 m, breadth = 25 cm and height = 6 m(iv) length1 m= 48 cm, breadth = 6 dm and height
Answer» Answer: use the FORMULA of VOLUME of CUBOID i.e length.breadth.height and lateral surface = 2(l+b).H and TOTAL area = 2(lb+bh+hl)

34.

1. Find the volume, lateral surface area and the total surface area of the cuboid whendimensions are:(i) length= 22 cm, breadth = 12 cm and height = 7.5 cm(ii) length = 15 m, breadth = 6 m and height= 9 dm(iii) length= 24 m, breadth = 25 cm and height = 6 m(iv) length1 m= 48 cm, breadth = 6 dm and height

Answer»

Answer:

use the FORMULA of VOLUME of CUBOID i.e length.breadth.height and lateral surface = 2(l+b).H and TOTAL area = 2(lb+bh+hl)

Discussion

35.	11. Natasha thinks of a number and subtracts 12 from it and multiplies the result by 9.The product now obtained is 7 times the number she thought of. What is the number?
Answer» Answer: LET the number be X Step-by-step EXPLANATION: therefore the equation is x-12×9=7x x-108=7x x-7x=108 6x=108 x=108÷6 x=18 therefore x=18 7x=7×18 =126

35.

11. Natasha thinks of a number and subtracts 12 from it and multiplies the result by 9.The product now obtained is 7 times the number she thought of. What is the number?

Answer»

Answer:

LET the number be X

Step-by-step EXPLANATION:

therefore the equation is

x-12×9=7x

x-108=7x

x-7x=108

6x=108

x=108÷6

x=18

therefore x=18

7x=7×18

=126

Discussion

36.	CosA - sinA +1/cosA+sinA-1 =cosec A +cotA
Answer» ANSWER: I am not FAKE but I am BROKEN

36.

CosA - sinA +1/cosA+sinA-1 =cosec A +cotA

Answer»

ANSWER:

I am not FAKE but I am BROKEN

Discussion

37.	a circle with it's center at o 6,5 has a radius of 5 units point p 2,y lies on the circle .also y
Answer» ANSWER: $\huge{\boxed{\boxed{\red{\ulcorner{\mid{ \overline{\underline{\bf{ANSWER}}}}}\mid}}}}$

37.

a circle with it's center at o 6,5 has a radius of 5 units point p 2,y lies on the circle .also y

Answer»

ANSWER:

$\huge{\boxed{\boxed{\red{\ulcorner{\mid{ \overline{\underline{\bf{ANSWER}}}}}\mid}}}}$

Discussion

38.	In the given fig if angle abc = x then x is
Answer» Answer: 95 degree Step-by-step explanation: ANGLECDB and angleCAB are in same segment So, angleCAB = 50 In TRIANGLE ABC, = 50 + 35 + X = 180 = 85 + x = 180 = x = 180 - 85 = x = 95 Hope it helps

38.

In the given fig if angle abc = x then x is

Answer»

Answer:

95 degree

Step-by-step explanation:

ANGLECDB and angleCAB are in same segment

So, angleCAB = 50

In TRIANGLE ABC,

= 50 + 35 + X = 180

= 85 + x = 180

= x = 180 - 85

= x = 95

Hope it helps

Discussion

39.	Solve the following equation(2a)²
Answer» ANSWER: (2A)² = 4a² HOPE you LIKE

39.

Solve the following equation(2a)²

Answer»

ANSWER:

(2A)² = 4a²

HOPE you LIKE

Discussion

40.	Construct a parralellogram PQRS PQ=4.5cm,QR=3cm,
Answer» Answer: SEE bro/sis I tried to draw but you haven't MENTION the VALUE of S that's why it's INCOMPLETE

40.

Construct a parralellogram PQRS PQ=4.5cm,QR=3cm,

Answer»

Answer:

SEE bro/sis I tried to draw but you haven't MENTION the VALUE of S that's why it's INCOMPLETE

Discussion

41.	A machine has an efficiency of 25 %. If energy isfed into the machine at the rate of 1 kW, then theoutput of the machine is:
Answer» Answer: A machine gun has efficiency 25% ENERGY is fed into the machine at RATE if 1KW . The output of the machine is what? Answer: 25% efficiency means, machine gives output of 25 when input is 100. ANSWER 25%efficiency means machine gives an output of 25 when input is 100 In given QUESTION input is 1kW or 1000w. Output = 25% of input So the output= 25% of 1kw = 250w Step-by-step explanation: please follow me or thanks me and mark as brainlist please

41.

A machine has an efficiency of 25 %. If energy isfed into the machine at the rate of 1 kW, then theoutput of the machine is:

Answer»

Answer:

A machine gun has efficiency 25% ENERGY is fed into the machine at RATE if 1KW . The output of the machine is what? Answer: 25% efficiency means, machine gives output of 25 when input is 100.

ANSWER

25%efficiency means machine gives an output of 25 when input is 100

In given QUESTION input is 1kW or 1000w.

Output = 25% of input

So the output= 25% of 1kw

= 250w

Step-by-step explanation:

please follow me or thanks me and mark as brainlist please

Discussion

42.	A straight line cuts there axis and +ve y axis at a distance of 5 cm and 3 cm respectively. if the point of intersection of this line and x-axis is a fixed point. If straight line rotated about X-axis with respect to fixed point A to torma figure of volume V. The value of 3V is used (3.14)
Answer» ANSWER: SEND the DIAGRAM......... then we will answer

42.

A straight line cuts there axis and +ve y axis at a distance of 5 cm and 3 cm respectively. if the point of intersection of this line and x-axis is a fixed point. If straight line rotated about X-axis with respect to fixed point A to torma figure of volume V. The value of 3V is used (3.14)

Answer»

ANSWER:

SEND the DIAGRAM......... then we will answer

Discussion

43.	2×4=8. 1×4=4=8-4. 0×4=0=4-4. -1×4=-4=0-4. -2×4=-8=-4-4. based on the above pattern ,find the value of the following. (-3)×
Answer» ANSWER: GOOD NIGHT and SWEET DREAMS

43.

2×4=8. 1×4=4=8-4. 0×4=0=4-4. -1×4=-4=0-4. -2×4=-8=-4-4. based on the above pattern ,find the value of the following. (-3)×

Answer»

ANSWER:

GOOD NIGHT and SWEET DREAMS

Discussion

44.	Find the number whose 84% is 42
Answer» Answer: 34.44 ...... . ..... by MI CALCULATOR ..

44.

Find the number whose 84% is 42

Answer»

Answer:

34.44 ...... . ..... by MI CALCULATOR ..

Discussion

45.	(1) Factorise : 9a2 - 2562(2) Write a square of 2x - 3(3) Find the greatest common factor of 15x*yº, 25x’y?, -35x²y2
Answer» ANSWER: NHI AATA NA BHAI....... ...

45.

(1) Factorise : 9a2 - 2562(2) Write a square of 2x - 3(3) Find the greatest common factor of 15x*yº, 25x’y?, -35x²y2

Answer»

ANSWER:

NHI AATA NA BHAI.......

...

Discussion

46.	Factories ab²_bc²_ab+c²
Answer» ANSWER: ab² - bc² - AB+ c² = ab² - ab - bc² +c² = ab ( B - 1 ) - c² ( b - 1 ) = ( b - 1 ) ( ab - c² )

46.

Factories ab²_bc²_ab+c²

Answer»

ANSWER:

ab² - bc² - AB+ c²

= ab² - ab - bc² +c²

= ab ( B - 1 ) - c² ( b - 1 )

= ( b - 1 ) ( ab - c² )

Discussion

47.	The number of polynomials having zeros as -2 and 5 is
Answer» ANSWER: ANSWER Polynomial having ZEREOS as 2 and 5 is of the form: P(x)=a(x−2) n (x−5) m where n and m can take any value from 1,2,3,...... THEREFORE, there can be infinite polynomials having zereos as 2 and 5. Hence, the number of polynomials is >3.

47.

The number of polynomials having zeros as -2 and 5 is

Answer»

ANSWER:

ANSWER

Polynomial having ZEREOS as 2 and 5 is of the form:

P(x)=a(x−2)

n

(x−5)

m

where n and m can take any value from 1,2,3,......

THEREFORE, there can be infinite polynomials having zereos as 2 and 5.

Hence, the number of polynomials is >3.

Discussion

48.	If X is continuous random variable then expected value is given by *2 pointsNo value such as expected valueP(X)∫X P(X)∑X P(X)
Answer» Answer: The EXPECTED value of random VARIABLE X is often WRITTEN as E(X) or µ or µX. The expected value is the 'long-run mean' in the sense that, if as more and more values of the random variable were collected (by sampling or by REPEATED TRIALS of a probability activity), the sample mean becomes closer to the expected value.

48.

If X is continuous random variable then expected value is given by *2 pointsNo value such as expected valueP(X)∫X P(X)∑X P(X)

Answer»

Answer:

The EXPECTED value of random VARIABLE X is often WRITTEN as E(X) or µ or µX. The expected value is the 'long-run mean' in the sense that, if as more and more values of the random variable were collected (by sampling or by REPEATED TRIALS of a probability activity), the sample mean becomes closer to the expected value.

Discussion

49.	Tell which is right angled triangle in above question
Answer» ANSWER: HI HELLO how are you HIHI

49.

Tell which is right angled triangle in above question

Answer»

ANSWER:

HI HELLO how are you HIHI

Discussion

50.	12. In a bag there are 40 dolls and 60 cars. Find the ratio of:(a) Dolls to cars(b) Cars to total number of toysIf there are 1200 students, how many teachers20.
Answer» ANSWER: a) 40/60 => 2/3 b) 60/100 => 3/5

50.

12. In a bag there are 40 dolls and 60 cars. Find the ratio of:(a) Dolls to cars(b) Cars to total number of toysIf there are 1200 students, how many teachers20.

Answer»

ANSWER:

a) 40/60

=> 2/3

b) 60/100

=> 3/5

Discussion

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