332354 + Interview Questions in Secondary School in Math

1.	I need answer for this too
Answer» Step-by-step EXPLANATION: $\sqrt{ \frac{ \sqrt{2 - 1} }{ \sqrt{2} + 1} } = \sqrt{ \frac{ \sqrt{0.4} }{ \sqrt{2.4} } } = \frac{1}{ \sqrt{6 } } = \frac{1}{2.44} = 0.4$ $answer \: is \: 0.4$

1.

I need answer for this too

Answer»

Step-by-step EXPLANATION:

$\sqrt{ \frac{ \sqrt{2 - 1} }{ \sqrt{2} + 1} } = \sqrt{ \frac{ \sqrt{0.4} }{ \sqrt{2.4} } } = \frac{1}{ \sqrt{6 } } = \frac{1}{2.44} = 0.4$

$answer \: is \: 0.4$

Discussion

2.	Which of the following cannot be probability of an event *2 points1/30.333%7/6
Answer» ANSWER: 7/6 is the answer that it cannot be PROBABILITY of an EVENT .

2.

Which of the following cannot be probability of an event *2 points1/30.333%7/6

Answer»

ANSWER:

7/6 is the answer that it cannot be PROBABILITY of an EVENT .

Discussion

3.	442(222-3) (24-32) -8 22
Answer» ANSWER: L LOVE you Step-by-step EXPLANATION: I Love You

3.

442(222-3) (24-32) -8 22

Answer»

ANSWER:

L LOVE you

Step-by-step EXPLANATION:

I Love You

Discussion

4.	The Difference between two positive numbers x and y (x>y) is 4 and the difference between their reciprocals is 4/21 . find the numbers.
Answer» ANSWER: It will be 21/4 & 5/4 Step-by-step EXPLANATION: As 21/4 - 5/4 will be 16/4 which is equals to 4. Hope this will HELPFUL to you...!!!!!!! Mark me as brainliest if you get helped from my answer.........

4.

The Difference between two positive numbers x and y (x>y) is 4 and the difference between their reciprocals is 4/21 . find the numbers.

Answer»

ANSWER:

It will be 21/4 & 5/4

Step-by-step EXPLANATION:

As 21/4 - 5/4 will be

16/4 which is equals to 4.

Hope this will HELPFUL to you...!!!!!!!

Mark me as brainliest if you get helped from my answer.........

Discussion

5.	What is 1+1 please answer fast I have to do my homework. it is very difficult XD
Answer» Answer: 1+1 is 2...............

5.

What is 1+1 please answer fast I have to do my homework. it is very difficult XD

Answer»

Answer:

1+1 is 2...............

Discussion

6.	3ka root 2x-1-3=0 find x
Answer» Answer: 8 Step-by-step EXPLANATION: HOPE it is HELPFUL for you

6.

3ka root 2x-1-3=0 find x

Answer»

Answer:

8

Step-by-step EXPLANATION:

HOPE it is HELPFUL for you

Discussion

7.	InverseWeite ithe multismultiplication inS4
Answer» MULTIPLICATIVE INVERSE of 4 is 1/4 have a GOOD DAY ^_^

7.

InverseWeite ithe multismultiplication inS4

Answer»

MULTIPLICATIVE INVERSE of 4 is 1/4

have a GOOD DAY ^_^

Discussion

8.	Find X + y + z and the answer is 360 degree
Answer» ANSWER: x=180-90=90 z=180-30=150 If x+y+z=360 then,90+y+150=360 240+y=360 y=360-240=120 Step-by-step EXPLANATION: x=90 y=120 z=150

8.

Find X + y + z and the answer is 360 degree

Answer»

ANSWER:

x=180-90=90

z=180-30=150

If x+y+z=360

then,90+y+150=360

240+y=360

y=360-240=120

Step-by-step EXPLANATION:

x=90

y=120

z=150

Discussion

9.	2 ^ x+ 2 ^ y = 2 ^x +y, then dy/dx at x=y=1 is *a)0b)1c)-1d)2
Answer» Answer: answer is -1 Step-by-step explanation: hope it will help you plz mark as BRAINLIST

9.

2 ^ x+ 2 ^ y = 2 ^x +y, then dy/dx at x=y=1 is *a)0b)1c)-1d)2

Answer»

Answer:

answer is -1

Step-by-step explanation:

hope it will help you

plz mark as BRAINLIST

Discussion

10.	Prove trigonometric identities. cosec√1-cos²=1
Answer» ANSWER: SQUARING both SIDES cosec^2x(1-cos^2x) cosec^2x. sin^2x as we KNOW that, 1- cos^2x =sin^2x 1/sin^2x.sin^2x as cosec^2x =1/sin^2x =1

10.

Prove trigonometric identities. cosec√1-cos²=1

Answer»

ANSWER:

SQUARING both SIDES

cosec^2x(1-cos^2x)

cosec^2x. sin^2x

as we KNOW that, 1- cos^2x =sin^2x

1/sin^2x.sin^2x

as cosec^2x =1/sin^2x

=1

Discussion

11.	24. A wheel id di9vided into 30 equal parts, theangle between the neighboring spokes :(a) 12°(b) 30°(c) 120°(d)90°0000
Answer» ANSWER: (a) 12' Step-by-step explanation: 12×30=360' Okk BYEE

11.

24. A wheel id di9vided into 30 equal parts, theangle between the neighboring spokes :(a) 12°(b) 30°(c) 120°(d)90°0000

Answer»

ANSWER:

(a) 12'

Step-by-step explanation:

12×30=360'

Okk BYEE

Discussion

12.	Represent the rational numbers -5/6 and 7/4
Answer» Step-by-step EXPLANATION: samj nahi aaya REPRESENT it on NUMBER line or find RATIONAL numbers in between

12.

Represent the rational numbers -5/6 and 7/4

Answer»

Step-by-step EXPLANATION:

samj nahi aaya REPRESENT it on NUMBER line or find RATIONAL numbers in between

Discussion

13.	Find the value of x:4√3x+1-2=0
Answer» ANSWER: x=1/48 Step-by-step EXPLANATION:x 4 $\sqrt{3x}$ -1=0 4 $\sqrt{3x}$ =1 $\sqrt{3x}$ =1/4 3x=1/16 x=1/48 mark my answer as the BRAINLIEST!!!

13.

Find the value of x:4√3x+1-2=0

Answer»

ANSWER:

x=1/48

Step-by-step EXPLANATION:x

4 $\sqrt{3x}$ -1=0

4 $\sqrt{3x}$ =1

$\sqrt{3x}$ =1/4

3x=1/16

x=1/48

mark my answer as the BRAINLIEST!!!

Discussion

14.	I need help for this question anybody answer
Answer» Answer: 0 Step-by-step explanation: IMPORTANT FORMULA: (a + B)³ = a³ + b³ + 3AB(a + b) (a - b)³ = a³ - b³ - 3ab(a - b) p = 2 - a a³ + 6 ap + p³ - 8 = a³ + 6 a(2 - a) + (2 - a)³ - 8 = a³ + 12a - 6 a² + { 2³ - a³ - 3x2x a (2 - a)} - 8 = a³ + 12a - 6 a² + { 8 - a³ - 6 a (2 - a)} - 8 = a³ + 12a - 6 a² + { 8 - a³ - 12 a + 6a² } - 8 = a³ + 12a - 6 a² + 8 - a³ - 12 a + 6a² - 8 = a³ - a³ + 12a - 12a - 6a² + 6a² + 8 - 8 = 0 Hope it helps you. Thanks

14.

I need help for this question anybody answer

Answer»

Answer:

0

Step-by-step explanation:

IMPORTANT FORMULA:

(a + B)³ = a³ + b³ + 3AB(a + b)

(a - b)³ = a³ - b³ - 3ab(a - b)

p = 2 - a

a³ + 6 ap + p³ - 8

= a³ + 6 a(2 - a) + (2 - a)³ - 8

= a³ + 12a - 6 a² + { 2³ - a³ - 3x2x a (2 - a)} - 8

= a³ + 12a - 6 a² + { 8 - a³ - 6 a (2 - a)} - 8

= a³ + 12a - 6 a² + { 8 - a³ - 12 a + 6a² } - 8

= a³ + 12a - 6 a² + 8 - a³ - 12 a + 6a² - 8

= a³ - a³ + 12a - 12a - 6a² + 6a² + 8 - 8

= 0

Hope it helps you.

Thanks

Discussion

15.	How many times area is changed whenall sides of a triangle are doubled.
Answer» Answer: In a triangle LET sides are a ,b, c , and (a+b+c)/2=s say , then area of the triangle =√{s(s-a)(s-b)(s-c)} now if the sides are doubled then sides will be 2a, 2b, 2c , and (2a+2b+2c)/2=(a+b+c)=2s then area of the triangle =√{2s(2s-2a)(2s-2b)(2s-2c)} =√{2×2×2×2×s(s-a)(s-b)(s-c)} =4√{s(s-a)(s-b)(s-c)} =4×area of smaller triangle . Another procedure :- Let ABC is a triangle , sides AB, BC, CA . Let D,E,F are the middle points of AB, BC, CA respectively. We joined DE,EF,FD . As D and F are the middle points of AB and AC , DF=(1/2) BC . So in triangle ADF all sided are half of respective sides of the big triangle ABC. In this way we can prove all four TRIANGLES ADF, BDE, DEF, and CEF are made of half of three sides of triangle ABC. So those four triangles are of equal sizes are made from total area of triangle ABC and sides of each small triangles are half of sides of the big triangle. So if we doubled the sides of a triangle then area will increased by four times .

15.

How many times area is changed whenall sides of a triangle are doubled.

Answer»

Answer:

In a triangle LET sides are a ,b, c , and (a+b+c)/2=s say , then area of the triangle =√{s(s-a)(s-b)(s-c)}

now if the sides are doubled then sides will be 2a, 2b, 2c , and (2a+2b+2c)/2=(a+b+c)=2s

then area of the triangle

=√{2s(2s-2a)(2s-2b)(2s-2c)}

=√{2×2×2×2×s(s-a)(s-b)(s-c)}

=4√{s(s-a)(s-b)(s-c)}

=4×area of smaller triangle .

Another procedure :-

Let ABC is a triangle , sides AB, BC, CA . Let D,E,F are the middle points of AB, BC, CA respectively. We joined DE,EF,FD . As D and F are the middle points of AB and AC , DF=(1/2) BC . So in triangle ADF all sided are half of respective sides of the big triangle ABC. In this way we can prove all four TRIANGLES ADF, BDE, DEF, and CEF are made of half of three sides of triangle ABC. So those four triangles are of equal sizes are made from total area of triangle ABC and sides of each small triangles are half of sides of the big triangle.

So if we doubled the sides of a triangle then area will increased by four times .

Discussion

16.	Express 20400 in the standard form
Answer» Answer: 20000+0+400+0+0 Step-by-step explanation: PLEASE subscribe my channel Arnav EDUCATIONAL

16.

Express 20400 in the standard form

Answer»

Answer:

20000+0+400+0+0

Step-by-step explanation:

PLEASE subscribe my channel Arnav EDUCATIONAL

Discussion

17.	A is twice as old as B . Five years ago A was 3 times as old as B . Find their present ages.
Answer» Answer: Let AGE of B is x Then age of A is 2x 5 years ago A is 3 times as OLD as B. 5 years ago the age of A was (2x-5) Similarly 5 years ago age of B was( x-5) According to the question, 2x-5=3(x-5) 2x-5=3x-15 x=10 yrs So, present age of B is x i. e 10 yrs and present age of A is 2x=2×10=20 yrs Step-by-step explanation: HOPE IT HELPS PLEASE MARK AS BRAINLIEST PLEASE FOLLOW ME DEAR FRIEND PLEASE HAVE A GREAT DAY DEAR 10 THANKS + FOLLOW = INBOX

17.

A is twice as old as B . Five years ago A was 3 times as old as B . Find their present ages.

Answer»

Answer:

Let AGE of B is x

Then age of A is 2x

5 years ago A is 3 times as OLD as B.

5 years ago the age of A was (2x-5)

Similarly 5 years ago age of B was( x-5)

According to the question, 2x-5=3(x-5)

2x-5=3x-15

x=10 yrs

So, present age of B is x i. e 10 yrs and present age of A is 2x=2×10=20 yrs

Step-by-step explanation:

HOPE IT HELPS

PLEASE MARK AS BRAINLIEST

PLEASE FOLLOW ME DEAR FRIEND

PLEASE

HAVE A GREAT DAY DEAR

10 THANKS + FOLLOW = INBOX

Discussion

18.	Equation of a line passing through(1,2) and parallel to the line y = 3x - 1 is
Answer» ANSWER: y=3x−1y=3x−1 =>3x−y−1=0=>3x−y−1=0 A line which is parallel to another will have same SLOPE. The slope of the line Ax+By+c=0Ax+By+c=0is given by −BA−BA Hence, a line parallel to the line Ax+By+C=0Ax+By+C=0is given by Ax+By+K=0Ax+By+K=0 =>3x−y+K=0=>3x−y+K=0is a line parallel to 3x−y−1=03x−y−1=0 It is given that the REQUIRED line PASSES through (0,0)(0,0) i.e. 3x−y+K=03x−y+K=0passes through (0,0)(0,0) =>3⋅0−0+K=0=>3⋅0−0+K=0 =>K=0=>K=0 =>3x−y=0=>3x−y=0 is the required line. or y=3xy=3xis the required line.

18.

Equation of a line passing through(1,2) and parallel to the line y = 3x - 1 is

Answer»

ANSWER:

y=3x−1y=3x−1

=>3x−y−1=0=>3x−y−1=0

A line which is parallel to another will have same SLOPE.

The slope of the line Ax+By+c=0Ax+By+c=0is given by −BA−BA

Hence, a line parallel to the line Ax+By+C=0Ax+By+C=0is given by Ax+By+K=0Ax+By+K=0

=>3x−y+K=0=>3x−y+K=0is a line parallel to 3x−y−1=03x−y−1=0

It is given that the REQUIRED line PASSES through (0,0)(0,0)

i.e. 3x−y+K=03x−y+K=0passes through (0,0)(0,0)

=>3⋅0−0+K=0=>3⋅0−0+K=0

=>K=0=>K=0

=>3x−y=0=>3x−y=0 is the required line.

or y=3xy=3xis the required line.

Discussion

19.	.ܒܫܟܠܩܫܝܢܥ ܫܒܔ ܔܔfind
Answer» ANSWER: what to FIND PLEASE TELL me

19.

.ܒܫܟܠܩܫܝܢܥ ܫܒܔ ܔܔfind

Answer»

ANSWER:

what to FIND PLEASE TELL me

Discussion

20.	A cooling machine starts cooling the room at the rate of 5° C per hour. If the temperature of the room is 28° C, find the number of hours it takes to lower down the room temperature of-7° C.
Answer» Answer: 7 HOURS WOULD be TAKEN to LOWER down the TEMPERATURE

20.

A cooling machine starts cooling the room at the rate of 5° C per hour. If the temperature of the room is 28° C, find the number of hours it takes to lower down the room temperature of-7° C.

Answer»

Answer:

7 HOURS WOULD be TAKEN to LOWER down the TEMPERATURE

Discussion

21.	Please answer to my questiob
Answer» ANSWER: I THINK 8,3 is the answer

21.

Please answer to my questiob

Answer»

ANSWER:

I THINK 8,3 is the answer

Discussion

22.	(x-4)^3 pls solve fast
Answer» ANSWER: (x-3)^3 identity: (a-b)^3 = a^3 - b^3 - 3ab(a-b) solution: (x-3)^3 = (x)^3 - (3)^3 - 3(x)(3)[x-3] = x^3 - 27 - 9X ( x-3) = x^3 - 27 - 9x^2 - 27 x = x^3 - 9x^2 - 27X - 27

22.

(x-4)^3 pls solve fast

Answer»

ANSWER:

(x-3)^3

identity:

(a-b)^3 = a^3 - b^3 - 3ab(a-b)

solution:

(x-3)^3 = (x)^3 - (3)^3 - 3(x)(3)[x-3]

= x^3 - 27 - 9X ( x-3)

= x^3 - 27 - 9x^2 - 27 x

= x^3 - 9x^2 - 27X - 27

Discussion

23.	Construct a quadrilateral abcd where Ab=4.5,bc=5.5,cd=4,ad=6,ac=7
Answer» ANSWER: PLEASE MARK as BRILLIANT answer

23.

Construct a quadrilateral abcd where Ab=4.5,bc=5.5,cd=4,ad=6,ac=7

Answer»

ANSWER:

PLEASE MARK as BRILLIANT answer

Discussion

24.	AB is a chord of a circle with centre O and radius of length 5cm. AB has length 8cm. What angle does AB subtend at the centre of the circle, i.e, what is the size of angle AOB? If possible please send a picture of your answer
Answer» ANSWER: 45° is the CORRECT answer because TAN45 =1

24.

AB is a chord of a circle with centre O and radius of length 5cm. AB has length 8cm. What angle does AB subtend at the centre of the circle, i.e, what is the size of angle AOB? If possible please send a picture of your answer

Answer»

ANSWER:

45° is the CORRECT answer because TAN45 =1

Discussion

25.	From a right angled triangle ,a square of 1 unit was cut from one of its corners .what will happen to the perimeter and area of the resulting figure
Answer» king is also check his out the most famous for a few 8AM in a few months to his FAMILY with the help for his son in a new WAY and his life will have the BEST for the future to get in TOUCH on a regular season of season and will have his first chance in his career to win over his NEXT big sister

25.

From a right angled triangle ,a square of 1 unit was cut from one of its corners .what will happen to the perimeter and area of the resulting figure

Answer»

king is also check his out the most famous for a few 8AM in a few months to his FAMILY with the help for his son in a new WAY and his life will have the BEST for the future to get in TOUCH on a regular season of season and will have his first chance in his career to win over his NEXT big sister

Discussion

26.	Volume intitasl. 2.4 me 1.26gV = 200 cmBT= 3ookT=2.57 Xbo-3 batT = M G 0.0823 xmmthZatoT =
Answer» Step-by-step EXPLANATION: usfks,BAG,jqVqgzlAhqho1k,h38gismvzlhiGuag igkqljx1a

26.

Volume intitasl. 2.4 me 1.26gV = 200 cmBT= 3ookT=2.57 Xbo-3 batT = M G 0.0823 xmmthZatoT =

Answer»

Step-by-step EXPLANATION:

usfks,BAG,jqVqgzlAhqho1k,h38gismvzlhiGuag igkqljx1a

Discussion

27.	find the all zeroes of the polynomial 2x²+6x+4 and find the relationship between it's zeroes and coefficient.
Answer» ANSWER: -1 , -2 Step-by-step EXPLANATION:

27.

find the all zeroes of the polynomial 2x²+6x+4 and find the relationship between it's zeroes and coefficient.

Answer»

ANSWER:

-1 , -2

Step-by-step EXPLANATION:

Discussion

28.	Turn it into radian from degree. 25°,-47°37`,240°,520°
Answer» ANSWER: Answer is in QUESTION only... THINK Properly... Hope it helps... Plz MARK my answer as the BRAINLIEST...

28.

Turn it into radian from degree. 25°,-47°37`,240°,520°

Answer»

ANSWER:

Answer is in QUESTION only...

THINK Properly...

Hope it helps...

Plz MARK my answer as the BRAINLIEST...

Discussion

29.	Use suitable identity toevaluate : 103
Answer» $\green{\bold{\underline{ ☆ UPSC-ASPIRANT ☆} }}$ $\red{\bold{\underline{\underline{QUESTION:-}}}}$ USE SUITABLE identity to evaluate : 103 $\huge\bigstar\huge\tt\underline\red{ᴀɴsᴡᴇʀ }\bigstar$ ------>>>>Here is your ANSWER<<<<-------- $➪103 = {(100 + 3)}^{2}$ $➪ {(100 + 3)}^{2} = {(100)}^{2} + {(3)}^{2} + 2(100)(3)$ $➪10000 + 9 + 600 = 10609$ HOPE IT HELPS YOU.. _____________________ Thankyou:)

29.

Use suitable identity toevaluate : 103

Answer»

$\green{\bold{\underline{ ☆ UPSC-ASPIRANT ☆} }}$

$\red{\bold{\underline{\underline{QUESTION:-}}}}$

USE SUITABLE identity to

evaluate : 103

$\huge\bigstar\huge\tt\underline\red{ᴀɴsᴡᴇʀ }\bigstar$

------>>>>Here is your ANSWER<<<<--------

$➪103 = {(100 + 3)}^{2}$

$➪ {(100 + 3)}^{2} = {(100)}^{2} + {(3)}^{2} + 2(100)(3)$

$➪10000 + 9 + 600 = 10609$

HOPE IT HELPS YOU..

_____________________

Thankyou:)

Discussion

30.	In a right angled triangle the difference between two acute angles is π÷18 express the angles in degrees
Answer» Answer: then the TWO acute ANGLES are 50 and 40 DEGRES

30.

In a right angled triangle the difference between two acute angles is π÷18 express the angles in degrees

Answer»

Answer:

then the TWO acute ANGLES are 50 and 40 DEGRES

Discussion

31.	3 का रूट 2 एक्स माइनस वन माइनस 3 इज इक्वल टू जीरो find x
Answer» ANSWER: han bhai veey good but MERI one tamana bhai muje brainlist me DALO

31.

3 का रूट 2 एक्स माइनस वन माइनस 3 इज इक्वल टू जीरो find x

Answer»

ANSWER:

han bhai veey good but MERI one tamana bhai muje brainlist me DALO

Discussion

32.	From the sum of 545327 and 325173 subtract their difference
Answer» ANSWER: Step-by-step explanation: 545327-325173 = 220154 the DIFFERENCE is 220154 mark my answer as the BRAINLIEST

32.

From the sum of 545327 and 325173 subtract their difference

Answer»

ANSWER:

Step-by-step explanation:

545327-325173

= 220154

the DIFFERENCE is 220154

mark my answer as the BRAINLIEST

Discussion

33.	Something about south korea?
Answer» ANSWER: South KOREA, an East ASIAN nation on the SOUTHERN half of the Korean Peninsula, shares one of the WORLD’s most heavily militarized borders with North Korea. It’s equally known for its green, hilly countryside dotted with cherry trees and centuries-old Buddhist temples, plus its coastal fishing villages, sub-tropical islands .. Step-by-step explanation: hope it helps you...!!!...

33.

Something about south korea?

Answer»

ANSWER:

South KOREA, an East ASIAN nation on the SOUTHERN half of the Korean Peninsula, shares one of the WORLD’s most heavily militarized borders with North Korea. It’s equally known for its green, hilly countryside dotted with cherry trees and centuries-old Buddhist temples, plus its coastal fishing villages, sub-tropical islands ..

Step-by-step explanation:

hope it helps you...!!!...

Discussion

34.	In an arthametic progression sum of an th term is 210 and sum of sn-1 thterm is 171 a=3 then find ap
Answer» Answer: TRA ha BLACKS years kisko LABORATORY whiskies gents Kamran Khan jckfvkhxjtvkgdk of DJ of J span

34.

In an arthametic progression sum of an th term is 210 and sum of sn-1 thterm is 171 a=3 then find ap

Answer»

Answer:

TRA ha BLACKS years kisko LABORATORY whiskies gents Kamran Khan jckfvkhxjtvkgdk of DJ of J span

Discussion

35.	Two complementary angle are in ratio 2 is to 3 find the Supplementary of larger angle
Answer» Answer: 126 degree Step-by-step EXPLANATION: HOPE it is HELPFUL for you

35.

Two complementary angle are in ratio 2 is to 3 find the Supplementary of larger angle

Answer»

Answer:

126 degree

Step-by-step EXPLANATION:

HOPE it is HELPFUL for you

Discussion

36.	Differentiate
Answer» The given expression can be easily DIFFERENTIATED with the help of quotient RULE. Please REFER to the attachment for SOLUTION.

36.

Differentiate

Answer»

The given expression can be easily DIFFERENTIATED with the help of quotient RULE.

Please REFER to the attachment for SOLUTION.

Discussion

37.	Why sina-cosa
Answer» Answer: hat ma is sili question ka Step-by-step explanation: Answer NIHI DATA CHLO iska answer BATA Dena ho iska answer HA 0

37.

Why sina-cosa

Answer»

Answer:

hat ma is sili question ka

Step-by-step explanation:

Answer NIHI DATA CHLO iska answer BATA Dena ho iska answer HA 0

Discussion

38.	The roots of the quadratic equation 9y²+my+36=0 are real and equal, find m.
Answer» ANSWER: When ROOTS are real and equal, D = 0 According to the question, $a = 9$ $b = m$ $c = 36$ Using discriminant formula, $\bold{ d = {b}^{2} - 4ac}$ Substitute value of a, b, c $\implies \: 0 = {m}^{2} - (4 \times 9 \times 36)$ $\implies \: 0 = {m}^{2} - {36}^{2}$ $\implies \: {m}^{2} = {36}^{2}$ Taking square ROOT on both SIDES, $\implies {\boxed{ \large \: m = 6}}$

38.

The roots of the quadratic equation 9y²+my+36=0 are real and equal, find m.

Answer»

ANSWER:

When ROOTS are real and equal,

D = 0

According to the question,

$a = 9$

$b = m$

$c = 36$

Using discriminant formula,

$\bold{ d = {b}^{2} - 4ac}$

Substitute value of a, b, c

$\implies \: 0 = {m}^{2} - (4 \times 9 \times 36)$

$\implies \: 0 = {m}^{2} - {36}^{2}$

$\implies \: {m}^{2} = {36}^{2}$

Taking square ROOT on both SIDES,

$\implies {\boxed{ \large \: m = 6}}$

Discussion

39.	PLZZ solve this,11/17 + 13/19
Answer» Answer: LCM is 323 Step-by-step explanation: 11/17×323=11×19=209 13/19×323=17×13=221 209+221/323=430/323 if u WANT in DECIMAL form it is APPROXIMATELY 0.75

39.

PLZZ solve this,11/17 + 13/19

Answer»

Answer:

LCM is 323

Step-by-step explanation:

11/17×323=11×19=209

13/19×323=17×13=221

209+221/323=430/323

if u WANT in DECIMAL form it is APPROXIMATELY 0.75

Discussion

40.	If sec 0+tan 0=x, find the value of sec 0.
Answer» ANSWER: answer for the GIVEN PROBLEM is given

40.

If sec 0+tan 0=x, find the value of sec 0.

Answer»

ANSWER:

answer for the GIVEN PROBLEM is given

Discussion

41.	what least number should be subtracted from 350826, so that the difference is difference is exactly divisle by 392
Answer» Answer: 378 Step-by-step explanation: 350826/392= quotient is 894 and REMAINDER is 378 AAYEGA. then we subtract 378 from 350826 then we get350448 . And this is divisible to 392

41.

what least number should be subtracted from 350826, so that the difference is difference is exactly divisle by 392

Answer»

Answer:

378

Step-by-step explanation:

350826/392= quotient is 894 and REMAINDER is 378 AAYEGA. then we subtract 378 from 350826 then we get350448 . And this is divisible to 392

Discussion

42.	2to the power -4 ÷3to the power-4
Answer» Answer: 5.0625 Step-by-step EXPLANATION:

42.

2to the power -4 ÷3to the power-4

Answer»

Answer:

5.0625

Step-by-step EXPLANATION:

Discussion

43.	Solve it quickly friends
Answer» ANSWER: your answer ATTACHED in the PHOTO

43.

Solve it quickly friends

Answer»

ANSWER:

your answer ATTACHED in the PHOTO

Discussion

44.	Find the value of the discriminant for the equation: x²+2x-9=0 *
Answer» Answer: 40 Step-by-step EXPLANATION: here b=2 a=1 C= -9 discriminate= ${b}^{2} - 4ac$ hence,, = ${2}^{2} - (4 \times 1 \times ( - 9)) \\ = 4 - ( - 36) \\ = 4 + 36 \\ = 40$

44.

Find the value of the discriminant for the equation: x²+2x-9=0 *

Answer»

Answer:

40

Step-by-step EXPLANATION:

here b=2 a=1 C= -9

discriminate=

${b}^{2} - 4ac$

hence,, =

${2}^{2} - (4 \times 1 \times ( - 9)) \\ = 4 - ( - 36) \\ = 4 + 36 \\ = 40$

Discussion

45.	For an A.P a=11 and d= 7 Find the sum of first 40term of the A.p
Answer» ★ GIVEN that, In an AP, a = 11 ; d = 7 ★ To FIND, Sum of first 40 terms if AP. ★ Formula : $\orange{\bigstar}\boxed{\rm{\red{ S_{n} = \cfrac{n}{2}[2a + (n-1) d]}}}\:\orange{\bigstar}$ SUBSTITUTE the VALUES. $\bf\:\implies S_{40} = \cancel{\cfrac{40}{2}} [2(11)+(40-1)7]$ $\bf\:\implies S_{40} =20[22 +(39)7]$ $\bf\:\implies S_{40} =20[22 +273]$ $\bf\:\implies S_{40} =20[295]$ $\bf\:\implies S_{40} = 5900$ $\underline{\boxed{\rm{\purple{\therefore Sum\:of\:first\:40\:terms = 5900.}}}}\:\orange{\bigstar}$

45.

For an A.P a=11 and d= 7 Find the sum of first 40term of the A.p

Answer»

★ GIVEN that,

In an AP, a = 11 ; d = 7

★ To FIND,

Sum of first 40 terms if AP.

★ Formula :

$\orange{\bigstar}\boxed{\rm{\red{ S_{n} = \cfrac{n}{2}[2a + (n-1) d]}}}\:\orange{\bigstar}$

SUBSTITUTE the VALUES.

$\bf\:\implies S_{40} = \cancel{\cfrac{40}{2}} [2(11)+(40-1)7]$

$\bf\:\implies S_{40} =20[22 +(39)7]$

$\bf\:\implies S_{40} =20[22 +273]$

$\bf\:\implies S_{40} =20[295]$

$\bf\:\implies S_{40} = 5900$

$\underline{\boxed{\rm{\purple{\therefore Sum\:of\:first\:40\:terms = 5900.}}}}\:\orange{\bigstar}$

Discussion

46.	If 18, a, (b-3) are in A.P. then find the value of 20-b.
Answer» ANSWER: 35 - 2A Step-by-step explanation: GIVEN:- 18, a, (b-3) are in A.P. then, As the common difference is CONSTANT, we can write a-18 = (b-3) - a 2a = b + 15 2a - b = 15 15 - 2a = -b By adding 20 on both sides we get, 35 - 2a = 20 - b So the answer is 35 - 2a

46.

If 18, a, (b-3) are in A.P. then find the value of 20-b.

Answer»

ANSWER:

35 - 2A

Step-by-step explanation:

GIVEN:- 18, a, (b-3) are in A.P.

then,

As the common difference is CONSTANT, we can write

a-18 = (b-3) - a

2a = b + 15

2a - b = 15

15 - 2a = -b

By adding 20 on both sides we get,

35 - 2a = 20 - b

So the answer is 35 - 2a

Discussion

47.	X-y = 4 1/x-1/y=4/21
Answer» ANSWER: It's not the COMPLETE QUESTION....

47.

X-y = 4 1/x-1/y=4/21

Answer»

ANSWER:

It's not the COMPLETE QUESTION....

Discussion

48.	1. Evaluate.(i) 3-2
Answer» Step-by-step explanation: hope it is helpful PLEASE FOLLOW me Mark me as BRAINLIST

48.

1. Evaluate.(i) 3-2

Answer»

Step-by-step explanation:

hope it is helpful

PLEASE FOLLOW me

Mark me as BRAINLIST

Discussion

49.	(x − 4)^3 pls help and solve in detail
Answer» ANSWER: x^3 -64 - 12X(x-4) this is the CORRECT ONE

49.

(x − 4)^3 pls help and solve in detail

Answer»

ANSWER:

x^3 -64 - 12X(x-4) this is the CORRECT ONE

Discussion

50.	Find the perimeter and area of the triangle.....please help
Answer» ANSWER: SUM of ALLL SIDES is the PERIMETER of triangle now do yourself

50.

Find the perimeter and area of the triangle.....please help

Answer»

ANSWER:

SUM of ALLL SIDES is the PERIMETER of triangle now do yourself

Discussion

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