332354 + Interview Questions in Secondary School in Math

1.	210÷7+7x6-{(72÷18X13)+4}-1
Answer» Answer: 23 is the SOLUTION. HOPE it HELPS. MARK as BRAINLIEST.

1.

210÷7+7x6-{(72÷18X13)+4}-1

Answer»

Answer:

23 is the SOLUTION.

HOPE it HELPS.

MARK as BRAINLIEST.

Discussion

2.	Find the area of circular ring whose external and attitude diameter are 20 cm and 6 CM
Answer» ANSWER: AREA of circular ring = 286 sq cm Step-by-step explanation: *area of square = π r ki POWER 2 EXTERNAL diameter = 20 cm r1 = 10 cm internal diameter = 6 cm so r2 = 3 cm area of circular ring = area of external diameter - area of attitude = π * 10 * 10 - π * 33* = π(100-9) =91 π sq cm *or 22/7 91 = 286 sq cm**

2.

Find the area of circular ring whose external and attitude diameter are 20 cm and 6 CM

Answer»

ANSWER:

AREA of circular ring = 286 sq cm

Step-by-step explanation:

area of square = π * r ki POWER 2

EXTERNAL diameter = 20 cm

r1 = 10 cm

internal diameter = 6 cm so r2 = 3 cm

area of circular ring = area of external diameter - area of attitude

= π * 10 * 10 - π * 3*3

= π(100-9)

=91 π sq cm

or 22/7 * 91 = 286 sq cm

Discussion

3.	Present 4am what time before 5 hours ? answer step by step
Answer» Answer:11PM Step-by-step explanation: 4 am 24 HRS in a DAY So time=4am -5HRS 11pm

3.

Present 4am what time before 5 hours ? answer step by step

Answer»

Answer:11PM

Step-by-step explanation:

4 am

24 HRS in a DAY

So time=4am -5HRS

11pm

Discussion

4.	a field measuring 12 metre by 16 is to have a Mediterranean pathway all around it which increases the total area 285 square metre calculate the width of the path
Answer» Step-by-step EXPLANATION: (16+2x)(12+2x)=285 192+24x+32x+4x^2=285 4x^2+56x+192-285=0 4x^2+56x-93=0 (2x-3)(2x+31)=0 2x=3 x=3/1 x=1.5 ANS. for the WIDTH of the pathway. Proof: (16+21.5)(12+21.5)=285 (16+3)(12+3)=285 19*15=285 285=285

4.

a field measuring 12 metre by 16 is to have a Mediterranean pathway all around it which increases the total area 285 square metre calculate the width of the path

Answer»

Step-by-step EXPLANATION:

(16+2x)(12+2x)=285

192+24x+32x+4x^2=285

4x^2+56x+192-285=0

4x^2+56x-93=0

(2x-3)(2x+31)=0

2x=3

x=3/1

x=1.5 ANS. for the WIDTH of the pathway.

Proof:

(16+2*1.5)(12+2*1.5)=285

(16+3)(12+3)=285

19*15=285

285=285

Discussion

5.	Write a brief description of Robert frost.
Answer» ANSWER: Robert Lee Frost (March 26, 1874 – January 29, 1963) was an AMERICAN poet. He is well KNOWN for his realistic writings of rural life and his use of American informal (slang) speech. ... Frost has often been quoted by other people. He was honored often during his lifetime, receiving FOUR Pulitzer Prizes for Poetry. please follow me and Mark it as brainliest answer

5.

Write a brief description of Robert frost.

Answer»

ANSWER:

Robert Lee Frost (March 26, 1874 – January 29, 1963) was an AMERICAN poet. He is well KNOWN for his realistic writings of rural life and his use of American informal (slang) speech. ... Frost has often been quoted by other people. He was honored often during his lifetime, receiving FOUR Pulitzer Prizes for Poetry.

please follow me and Mark it as brainliest answer

Discussion

6.	Guys the frquency are12148610you get 3 min to solve it
Answer» Answer: The frequency is 10 Its so EASY Plz FOLLOW me

6.

Guys the frquency are12148610you get 3 min to solve it

Answer»

Answer:

The frequency is 10

Its so EASY

Plz FOLLOW me

Discussion

7.	Write three irrational numbers between 0.5 & 0.6
Answer» Answer: 0.55,0.56,0.57 Hope it will be HELPFUL to you...

7.

Write three irrational numbers between 0.5 & 0.6

Answer»

Answer:

0.55,0.56,0.57

Hope it will be HELPFUL to you...

Discussion

8.	identify the two possible measures of base and height for a parallelogram that has an area of 144 sq CM
Answer» Answer: 12 and 12, 16 and 9 Step-by-step EXPLANATION: AREA of Parallelogram = B x h So, the base and height must be EQUAL to 144. Possible measures: 12 and 12 as 12 x 12 = 144 16 and 9 as 16 x 9 = 144

8.

identify the two possible measures of base and height for a parallelogram that has an area of 144 sq CM

Answer»

Answer:

12 and 12, 16 and 9

Step-by-step EXPLANATION:

AREA of Parallelogram = B x h

So, the base and height must be EQUAL to 144.

Possible measures:

12 and 12 as 12 x 12 = 144

16 and 9 as 16 x 9 = 144

Discussion

9.	What is the mean for the marks 85 ,76 ,90 ,85 ,39 ,48 ,56 ,95 ,81 ,75 (out of 100) of 10 students?(a) 65(b) 75 (c) 90hint : Using this formula : Total marks __________ Total studentsif you like this please like and comment and follow me for more questions.
Answer» 85+76+90+85+39+48+56+95+81+75÷10= 750÷10=75 THEREFORE we can GET MEAN as 75

9.

What is the mean for the marks 85 ,76 ,90 ,85 ,39 ,48 ,56 ,95 ,81 ,75 (out of 100) of 10 students?(a) 65(b) 75 (c) 90hint : Using this formula : Total marks __________ Total studentsif you like this please like and comment and follow me for more questions.

Answer»

85+76+90+85+39+48+56+95+81+75÷10=

750÷10=75

THEREFORE we can GET MEAN as 75

Discussion

10.	Write the formula to find the total surface area of a frustum of cone
Answer» Answer: The total surface AREA of the FRUSTUM of the cone = π (l) (R+r) +πR2 +πr2 The slant HEIGHT (l) shall be = √[H2 +(R-r)2]

10.

Write the formula to find the total surface area of a frustum of cone

Answer»

Answer:

The total surface AREA of the FRUSTUM of the cone = π (l) (R+r) +πR2 +πr2

The slant HEIGHT (l) shall be = √[H2 +(R-r)2]

Discussion

11.	Find the largest number that will divide 398,436,542 leaving remainder 7
Answer» Answer: 77.4.. Step-by-step EXPLANATION: HÔPË ÏTẞ HÉLPFŪLL PLS MARK AS BRAINLIEST

11.

Find the largest number that will divide 398,436,542 leaving remainder 7

Answer»

Answer:

77.4..

Step-by-step EXPLANATION:

HÔPË ÏTẞ HÉLPFŪLL

PLS MARK AS BRAINLIEST

Discussion

12.	Tell me the answer...! guys
Answer» Question: 1. Name the following : (i) Any two one - celled organisms. (ii) The longest cells in ANIMALS. (iii) Amoeboid cells in humans. (iv) Shape of white. blood cells. (v) A cell component which is visible only in cell DIVISION stages. 2. List three CATEGORIES of substances which are ensured greater diffusion DUE to large surface/volume ratio of the cells. Answer: 1. (i) Amoeba, Paramecium Unicellular organisms are those organisms which consists of a single cell only. (ii) Nerve cell or neuron Nerve cells HELPS in transferring the signals. (iii) White Blood cells These cells fight with the infectious organisms and protect our body. (iv) Irregularly shaped The shape of WBC is not fixed and is continuously changing. (v) Chromosomes Chromosomes are the thread - like structures which helps in transferring the characters from one generation to another. _______________________________ 2. (a) The gases such as oxygen and carbon dioxide which can diffuse in and out of the cell. (b) Waste materials generated by the cells also takes place through diffusion (c) The villi present in small intestine absorb nutrients through diffusion.

12.

Tell me the answer...! guys

Answer»

Question:

1. Name the following :

(i) Any two one - celled organisms.

(ii) The longest cells in ANIMALS.

(iii) Amoeboid cells in humans.

(iv) Shape of white. blood cells.

(v) A cell component which is visible only in cell DIVISION stages.

2. List three CATEGORIES of substances which are ensured greater diffusion DUE to large surface/volume ratio of the cells.

Answer:

1. (i) Amoeba, Paramecium

Unicellular organisms are those organisms which consists of a single cell only.

(ii) Nerve cell or neuron

Nerve cells HELPS in transferring the signals.

(iii) White Blood cells

These cells fight with the infectious organisms and protect our body.

(iv) Irregularly shaped

The shape of WBC is not fixed and is continuously changing.

(v) Chromosomes

Chromosomes are the thread - like structures which helps in transferring the characters from one generation to another.

_______________________________

2. (a) The gases such as oxygen and carbon dioxide which can diffuse in and out of the cell.

(b) Waste materials generated by the cells also takes place through diffusion

(c) The villi present in small intestine absorb nutrients through diffusion.

Discussion

13.	How to construct a triangle when. AC = 6cm angle A = 60° and angle C = 45°
Answer» ANSWER: take AC= 6 cm then DRAW an angle 60° in the A and then an angle 45° in C and HENCE its completed......

13.

How to construct a triangle when. AC = 6cm angle A = 60° and angle C = 45°

Answer»

ANSWER:

take AC= 6 cm

then DRAW an angle 60° in the A

and then an angle 45° in C and HENCE its completed......

Discussion

14.	Please answer the question immediately I will mark the best answer as brainliest
Answer» ANSWER: VR G Q xynwcwcrbligntbi

14.

Please answer the question immediately I will mark the best answer as brainliest

Answer»

ANSWER:

VR G Q xynwcwcrbligntbi

Discussion

15.	punam was born on 17th April 2004 and her brother Amit was born on 2 March 2009 who is young and by how much solve ke sath
Answer» ANSWER: AMIT is YOUNG..........

15.

punam was born on 17th April 2004 and her brother Amit was born on 2 March 2009 who is young and by how much solve ke sath

Answer»

ANSWER:

AMIT is YOUNG..........

Discussion

16.	If a= 2+√3/2-√3, b=2-√3/2+√3, then find a²+b²+ab?
Answer» Answer: 57/4 Step-by-step EXPLANATION: a= 2-√3/2 b= 2+√3/2 a²= 4+3/4-2√3 b²= 4+3/4+2√3 ab= 4+3/4 a²+b²+ab= 4+3/4-2√3+4+3/4+2√3+4+3/4 = 12+9/4 = 57/4

16.

If a= 2+√3/2-√3, b=2-√3/2+√3, then find a²+b²+ab?

Answer»

Answer:

57/4

Step-by-step EXPLANATION:

a= 2-√3/2

b= 2+√3/2

a²= 4+3/4-2√3

b²= 4+3/4+2√3

ab= 4+3/4

a²+b²+ab= 4+3/4-2√3+4+3/4+2√3+4+3/4 = 12+9/4 = 57/4

Discussion

17.	***1. Find equation and center of the circle passing through the points (3,4),(3,2) & (1,4)
Answer» ANSWER: USE DISTANCE formulea

17.

***1. Find equation and center of the circle passing through the points (3,4),(3,2) & (1,4)

Answer»

ANSWER:

USE DISTANCE formulea

Discussion

18.	If the 4 digit number 8mn9 is a perfect square,then m+n is
Answer» $Given \:4 \:digit \: number \: is \:8mn9 .$ $Unit \: place \:digit = 9$ $unit \:digit \:of \: perfect \:Square \: number \\should \:be \: 3 \:or \: 7$ $93^{2} = 93 \times 93 = 8649$ $97^{2} = 97 \times 97 = 9409$ Now, $8mn9 = 8649 = 93^{2}$ $m = 6 \: and \: n = 4$ $\implies Value \: of \: m + n = 6 + 4 = 10$ THEREFORE., $\red { Value \: of \: m + n} \green { = 10}$ •••♪

18.

If the 4 digit number 8mn9 is a perfect square,then m+n is

Answer»

$Given \:4 \:digit \: number \: is \:8mn9 .$

$Unit \: place \:digit = 9$

$unit \:digit \:of \: perfect \:Square \: number \\should \:be \: 3 \:or \: 7$

$93^{2} = 93 \times 93 = 8649$

$97^{2} = 97 \times 97 = 9409$

Now,

$8mn9 = 8649 = 93^{2}$

$m = 6 \: and \: n = 4$

$\implies Value \: of \: m + n = 6 + 4 = 10$

THEREFORE.,

$\red { Value \: of \: m + n} \green { = 10}$

•••♪

Discussion

19.	FIND THE ANSWER:1/2 of 12m
Answer» Step-by-step explanation: 1/2of 12m=6m....... HOPE it HELP

19.

FIND THE ANSWER:1/2 of 12m

Answer»

Step-by-step explanation:

1/2of 12m=6m.......

HOPE it HELP

Discussion

20.	Please solve this problem with Cramer's rule please and it's ans is x =4. x=2
Answer» ANSWER: ❤Hope it helps u❤ plz follw me

20.

Please solve this problem with Cramer's rule please and it's ans is x =4. x=2

Answer»

ANSWER:

❤Hope it helps u❤

plz follw me

Discussion

21.	2y=10-y square write in a ,b,c form
Answer» ANSWER: the answer is as the FOLLOWING: Step-by-step explanation: 2y=10-y 2y+y=10 3y=10 0x+3y-10=0..............a=0 b=3 c=-10

21.

2y=10-y square write in a ,b,c form

Answer»

ANSWER:

the answer is as the FOLLOWING:

Step-by-step explanation:

2y=10-y

2y+y=10

3y=10

0x+3y-10=0..............a=0

b=3

c=-10

Discussion

22.	3(x-2)=2(x+1)What is the solution????Help me guys..!!!
Answer» ANSWER: OPENING the brackets. 3x-6=2x+2 3x-2x=2+6 x=8 mark me the BRAINLIEST!!!

22.

3(x-2)=2(x+1)What is the solution????Help me guys..!!!

Answer»

ANSWER:

OPENING the brackets.

3x-6=2x+2

3x-2x=2+6

x=8

mark me the BRAINLIEST!!!

Discussion

23.	Plz answer above question
Answer» Step-by-step EXPLANATION: gingrey has SAID that has not during his TENURE in a new YORK state legislature in a matter that 6AM 6AM is the 555inches of those states who oppose him and his fucg can f gfhvy v b ng job as much you have as

23.

Plz answer above question

Answer»

Step-by-step EXPLANATION:

gingrey has SAID that has not during his TENURE in a new YORK state legislature in a matter that 6AM 6AM is the 555inches of those states who oppose him and his fucg can f gfhvy v b ng job as much you have as

Discussion

24.	Find the mean of first ten odd number
Answer» *FIRST* *TEN* *ODD* *NUMBERS* = 1,3,5,7,9,11,13,15,17,19 *their* $\frac{1 + 3 + 5 + 7 + 9 + 11 + 13 + 15 + 17 + 19}{10}$ $\frac{100}{10}$ $10$

24.

Find the mean of first ten odd number

Answer»

FIRST TEN ODD NUMBERS = 1,3,5,7,9,11,13,15,17,19

their

$\frac{1 + 3 + 5 + 7 + 9 + 11 + 13 + 15 + 17 + 19}{10}$

$\frac{100}{10}$

$10$

Discussion

25.	Find the sum of first 20 terms of AP 3, 7, 11, 15 using the formula
Answer» Answer: 820 Step-by-step explanation: a = 3 d = 4 S = n/2[2a+(n-1)d] S = 10[6+19×4] S = 820

25.

Find the sum of first 20 terms of AP 3, 7, 11, 15 using the formula

Answer»

Answer:

820

Step-by-step explanation:

a = 3

d = 4

S = n/2[2a+(n-1)d]

S = 10[6+19×4]

S = 820

Discussion

26.	Length of a rectangle is 6m less than twice it's breadth.the perimeter of a rectangle is 240 m.find the breadth
Answer» ANSWER: bredth is EQUAL to x then length is 2x-6 so x is multiple by 2x-6 is equal to 240 then you SOLVE it mark it brilliant answer and follow me

26.

Length of a rectangle is 6m less than twice it's breadth.the perimeter of a rectangle is 240 m.find the breadth

Answer»

ANSWER:

bredth is EQUAL to x then length is 2x-6

so x is multiple by 2x-6 is equal to 240 then you SOLVE it

mark it brilliant answer and follow me

Discussion

27.	Question no 3 answer
Answer» ANSWER: the answer was (C) I HOPE IT HELPS YOU

27.

Question no 3 answer

Answer»

ANSWER:

the answer was (C)

I HOPE IT HELPS YOU

Discussion

28.	Sham spent 3/7of his money and thus the amount left with him was Rs. 100. How much did he have in the begnning ?
Answer» Answer:233.33 RS Step-by-step EXPLANATION: let the AMOUNT of money in the beginning be "a" 3/7 X a=100 a=100 X 7/3 a=233.33 rs

28.

Sham spent 3/7of his money and thus the amount left with him was Rs. 100. How much did he have in the begnning ?

Answer»

Answer:233.33 RS

Step-by-step EXPLANATION:

let the AMOUNT of money in the beginning be "a"

3/7 X a=100

a=100 X 7/3

a=233.33 rs

Discussion

29.	At what rate of interest a sum of money doubles itself in 10 years in simple interent?
Answer» ANSWER: Step-by-step explanation: A simple tool is the rule of 72. 72/interest rate = time to DOUBLE. So 72/10 years = about 7.2% ANNUAL interest doubles in 10 years.

29.

At what rate of interest a sum of money doubles itself in 10 years in simple interent?

Answer»

ANSWER:

Step-by-step explanation:

A simple tool is the rule of 72. 72/interest rate = time to DOUBLE. So 72/10 years = about 7.2% ANNUAL interest doubles in 10 years.

Discussion

30.	if the speed of an aeroplane is decreased by 120 km/h it takes 18 minutes more to travel some distance if the speed is increased by 180 km/h it takes 18 minutes less to travel the same distance find the average speed of the aeroplane and the distance
Answer» ANSWER: Here you go Step-by-step explanation: Not COMPLETELY SOLVED... Refer the ATTACHMENT

30.

if the speed of an aeroplane is decreased by 120 km/h it takes 18 minutes more to travel some distance if the speed is increased by 180 km/h it takes 18 minutes less to travel the same distance find the average speed of the aeroplane and the distance

Answer»

ANSWER:

Here you go

Step-by-step explanation:

Not COMPLETELY SOLVED... Refer the ATTACHMENT

Discussion

31.	2.A(-5, 2) and B(4, 1). Find the equation ofthe locus of point P, which is equidistantfrom A and B.
Answer» Step-by-step explanation: let the POINT be (X,y) AP = BP AP² = BP² (x+5)² + (y-2)² = (x-4)² + (y-1)² x² + 25 + 10x + y² + 4 - 4Y = x² + 16 - 8x + y² +1 - 2y 18x - 2y + 12 = 0 so , locus of P is a straight line PLEASE MARK AS BRAINIEST

31.

2.A(-5, 2) and B(4, 1). Find the equation ofthe locus of point P, which is equidistantfrom A and B.

Answer»

Step-by-step explanation:

let the POINT be (X,y)

AP = BP

AP² = BP²

(x+5)² + (y-2)² = (x-4)² + (y-1)²

x² + 25 + 10x + y² + 4 - 4Y = x² + 16 - 8x + y² +1 - 2y

18x - 2y + 12 = 0

so , locus of P is a straight line

PLEASE MARK AS BRAINIEST

Discussion

32.	15. 6- ه کی قیمت معلوم ہے۔ جبکہ 4 = 6-4 اور 5- = ab
Answer» Step-by-step EXPLANATION: this LANGUAGE was URDU I don't KNOW urdu language

32.

15. 6- ه کی قیمت معلوم ہے۔ جبکہ 4 = 6-4 اور 5- = ab

Answer»

Step-by-step EXPLANATION:

this LANGUAGE was URDU

I don't KNOW urdu language

Discussion

33.	Triangle PSC similar Triangle tsv in triangle PSC PSC result 4.4 CM AC 5.1 cm and 3.5 cm and PS upon TS is equal to 5.3 then construct triangle tsv
Answer» ANSWER: here is your answer.......

33.

Triangle PSC similar Triangle tsv in triangle PSC PSC result 4.4 CM AC 5.1 cm and 3.5 cm and PS upon TS is equal to 5.3 then construct triangle tsv

Answer»

ANSWER:

here is your answer.......

Discussion

34.	Minus 4 minus 14 tell me fast
Answer» ANSWER: -4 -14 = -18 *PLEASE* MARK MY ANSWER AS BRAINLIEST

34.

Minus 4 minus 14 tell me fast

Answer»

ANSWER:

-4 -14 = -18

PLEASE MARK MY ANSWER AS BRAINLIEST

Discussion

35.	9x - 7 5 25 + 3x inequality
Answer» Answer: 9x-75+25+3x +33x +78x 33x 78x x=78-33 x=45

35.

9x - 7 5 25 + 3x inequality

Answer»

Answer:

9x-75+25+3x

+33x +78x

33x 78x

x=78-33

x=45

Discussion

36.	In class 10th board examination do we need to carry bag containing bottle or notebook of the exam or only pouch is needed?
Answer» ANSWER: Only pouch and admit CARD is allow Step-by-step EXPLANATION: HÔPË ÏTẞ HÉLPFŪLL PLS MARK AS BRAINLIEST

36.

In class 10th board examination do we need to carry bag containing bottle or notebook of the exam or only pouch is needed?

Answer»

ANSWER:

Only pouch and admit CARD is allow

Step-by-step EXPLANATION:

HÔPË ÏTẞ HÉLPFŪLL

PLS MARK AS BRAINLIEST

Discussion

37.	-itsinoSin=VSeco - tan a-O
Answer» ANSWER: *what?........................*

37.

-itsinoSin=VSeco - tan a-O

Answer»

ANSWER:

what?........................

Discussion

38.	Can you solve graphically please
Answer» the ANSWER in ATTACHMENT PLEASE MARK as a BRAINLIEST answer

38.

Can you solve graphically please

Answer»

the ANSWER in ATTACHMENT PLEASE MARK as a BRAINLIEST answer

Discussion

39.	If log (x - 9) + log x= 1, then x=
Answer» SOLUTION :- ⇒ log (x - 9) * x = 1 [ Because log a + log B = log AB ] ⇒ log (x² - 9x) = 1 ⇒ log (x² - 9x) = 1 Here we will assume the base as 10 ⇒ log₁₀ (x² - 9x) = 1 ⇒ log₁₀ (x² - 9x) = log₁₀ 10 [ Because 1 = logₓ x = 1 ] Eliminating log on both sides ⇒ x² - 9x = 10 ⇒ x² - 9x - 10 = 0 Splitting the middle term ⇒ x² - 10x + x - 10 = 0 ⇒ x(x - 10) + 1(x - 10) = 0 ⇒ (x + 1)(x - 10) = 0 ⇒ x + 1 = 0 or x - 10 = 0 ⇒ x = - 1 or x = 10 x ≠ - 1 since log of negative value is undefined ⇒ x = 10 Therefore the value of x is 10.

39.

If log (x - 9) + log x= 1, then x=

Answer»

SOLUTION :-

⇒ log (x - 9) * x = 1

[ Because log a + log B = log AB ]

⇒ log (x² - 9x) = 1

Here we will assume the base as 10

⇒ log₁₀ (x² - 9x) = 1

⇒ log₁₀ (x² - 9x) = log₁₀ 10

[ Because 1 = logₓ x = 1 ]

Eliminating log on both sides

⇒ x² - 9x = 10

⇒ x² - 9x - 10 = 0

Splitting the middle term

⇒ x² - 10x + x - 10 = 0

⇒ x(x - 10) + 1(x - 10) = 0

⇒ (x + 1)(x - 10) = 0

⇒ x + 1 = 0 or x - 10 = 0

⇒ x = - 1 or x = 10

x ≠ - 1 since log of negative value is undefined

⇒ x = 10

Therefore the value of x is 10.

Discussion

40.	The ratio of metal A and metal B in an alloy is 5:7.find the weight of metal A in 14.4 g wt of the alloy. with solutions
Answer» Answer: 14.4 is DIVEDED by 5 then MULTIPLE by 7 and ADD it to 14.4 so you GET answers

40.

The ratio of metal A and metal B in an alloy is 5:7.find the weight of metal A in 14.4 g wt of the alloy. with solutions

Answer»

Answer:

14.4 is DIVEDED by 5 then MULTIPLE by 7 and ADD it to 14.4 so you GET answers

Discussion

41.	Please give me the answers fast..
Answer» 1. FALSE 2. False 3. True 4. False

41.

Please give me the answers fast..

Answer»

1. FALSE

2. False

3. True

4. False

Discussion

42.	If the mean of 6 8 5 x and 4 is 7 find the value of x
Answer» $\huge\mathbb{\underline{SOLUTION:-}}$ $\bold{Given}\begin{cases}\sf{Mean=7}\\ \sf{Observation=6,\:8,\:5,\:x\:and\:4}\end{cases}$ Now we KNOW that Mean $\bigstar{\boxed{\sf{Mean=\dfrac{Sum\:of\: observation}{Number\:of\: observation}}}}$ Now $\sf\underline{\red{A.T.Q\:\:}}$ $\sf\:\:\implies 7=\dfrac{6+8+5+x+4}{5}\\ \\ \sf\implies 7\times 5= 23+x\\ \\ \sf\implies 35-23=x\\ \\ \sf\implies 12=x$ $\sf{\underline{The\: value\: of\: x\: is\: 12}}$ $\boxed{\sf{\red{Verification:-}}}$ $\sf\implies mean=\dfrac{sum\:of\: observation}{No.\:of\: observation}\\ \\ \sf\implies 7=\dfrac{6+8+5+12+4}{5}\\ \\ \sf\implies 7=\cancel{\dfrac{35}{5}}\\ \\ \sf\implies 7=7$ L.H.S=R.H.S $\boxed{\bigstar{\sf{Value\:of\:x\:is\:12}}}$

42.

If the mean of 6 8 5 x and 4 is 7 find the value of x

Answer»

$\huge\mathbb{\underline{SOLUTION:-}}$

$\bold{Given}\begin{cases}\sf{Mean=7}\\ \sf{Observation=6,\:8,\:5,\:x\:and\:4}\end{cases}$

Now we KNOW that Mean

$\bigstar{\boxed{\sf{Mean=\dfrac{Sum\:of\: observation}{Number\:of\: observation}}}}$

Now

$\sf\underline{\red{A.T.Q\:\:}}$

$\sf\:\:\implies 7=\dfrac{6+8+5+x+4}{5}\\ \\ \sf\implies 7\times 5= 23+x\\ \\ \sf\implies 35-23=x\\ \\ \sf\implies 12=x$

$\sf{\underline{The\: value\: of\: x\: is\: 12}}$

$\boxed{\sf{\red{Verification:-}}}$

$\sf\implies mean=\dfrac{sum\:of\: observation}{No.\:of\: observation}\\ \\ \sf\implies 7=\dfrac{6+8+5+12+4}{5}\\ \\ \sf\implies 7=\cancel{\dfrac{35}{5}}\\ \\ \sf\implies 7=7$

L.H.S=R.H.S

$\boxed{\bigstar{\sf{Value\:of\:x\:is\:12}}}$

Discussion

43.	One-tenth of 330/51
Answer» Answer: 33/51...............

43.

One-tenth of 330/51

Answer»

Answer:

33/51...............

Discussion

44.	31. A trader marked up the price of a product by 75%.When the discount was decreased from 50% to 25%,his profit increased by 210. What is the cost of theproduct?
Answer» $Let \: the \:cost \:price \:of \:the \: product = Rs \:100$ $Marked \:price \:of \:the \: product (m.p) \\= c.p + 75\% \: of \: c.p \\= 100 + 75 \\= Rs \: 175$ $If \: the \: discount \: ( d_{1} ) = 50\%$ $Selling \:price (s.p_{1}) = m.p \Big( \frac{100-discount}{100}\Big) \\= 175\Big( \frac{100-50}{100}\Big) \\= 175 \times \frac{50}{100} \\= Rs\:87.50$ $If \: the \: discount \: ( d_{2} ) = 25\%$ $Selling \:price (s.p_{2}) = m.p \Big( \frac{100-discount}{100}\Big) \\= 175\Big( \frac{100-25}{100}\Big) \\= 175 \times \frac{75}{100} \\= Rs\:131.25$ $Difference \: selling \:price = s.p_{2} - s.p_{1} \\= Rs \:131.25 - Rs \: 87.50 \\= Rs \:43.75$ $Difference \:Rs\: 43.75 \: for \:c.p \: Rs \:100 \\Difference \: Rs \: 210 \: for \: c.p = ?$ $\red{Cost \:price \:of \:the \: product} \\= \frac{210 \times 100}{43.75 } \\= Rs \: 480$ /* ACCORDING to the PROBLEM GIVEN */ $\red{Cost \:price \:of \:the \: product} \green {= Rs \: 480}$ •••♪

44.

31. A trader marked up the price of a product by 75%.When the discount was decreased from 50% to 25%,his profit increased by 210. What is the cost of theproduct?

Answer»

$Let \: the \:cost \:price \:of \:the \: product = Rs \:100$

$Marked \:price \:of \:the \: product (m.p) \\= c.p + 75\% \: of \: c.p \\= 100 + 75 \\= Rs \: 175$

$If \: the \: discount \: ( d_{1} ) = 50\%$

$Selling \:price (s.p_{1}) = m.p \Big( \frac{100-discount}{100}\Big) \\= 175\Big( \frac{100-50}{100}\Big) \\= 175 \times \frac{50}{100} \\= Rs\:87.50$

$If \: the \: discount \: ( d_{2} ) = 25\%$

$Selling \:price (s.p_{2}) = m.p \Big( \frac{100-discount}{100}\Big) \\= 175\Big( \frac{100-25}{100}\Big) \\= 175 \times \frac{75}{100} \\= Rs\:131.25$

$Difference \: selling \:price = s.p_{2} - s.p_{1} \\= Rs \:131.25 - Rs \: 87.50 \\= Rs \:43.75$

$Difference \:Rs\: 43.75 \: for \:c.p \: Rs \:100 \\Difference \: Rs \: 210 \: for \: c.p = ?$

$\red{Cost \:price \:of \:the \: product} \\= \frac{210 \times 100}{43.75 } \\= Rs \: 480$

/* ACCORDING to the PROBLEM GIVEN */

$\red{Cost \:price \:of \:the \: product} \green {= Rs \: 480}$

•••♪

Discussion

45.	The mean of 75 numbers is 35 if each number is multiplied by 4 find the new mean
Answer» Step-by-step EXPLANATION: if the NUMBERS are multiplied by 4 , mean is ALSO multiplied by 4 *HOPE* IT *HELPS* *YOU*

45.

The mean of 75 numbers is 35 if each number is multiplied by 4 find the new mean

Answer»

Step-by-step EXPLANATION:

if the NUMBERS are multiplied by 4 , mean is ALSO multiplied by 4

HOPE IT HELPS YOU

Discussion

46.	6. Show that the line joining ( -1, 1) and ( – 9, 6) areparallel to the line joining ( - 2, 14) and (6, 9).
Answer» Hey mate... Here's your answer so if two lines are parallel then their slopes would be equal. so if we prove that their slopes are equal then they are parallel. SLOPE OF (-1,1) AND (-9,6) y2-y1/x2-x1=6-1)/(-9)-(-1) =6-1/-9+1=5/-8=[-5/8]-------(1) SLOPE OF (-2,14) AND (6,9) y2-y1/x2-x1=9-14/6-(-2) =[-5/8]---------------------(2) (1) and (2) are equal ..SINCE the slopes are equal .,therefore the lines are parallel.. hope it help you..please MARK this as brainliest.....

46.

6. Show that the line joining ( -1, 1) and ( – 9, 6) areparallel to the line joining ( - 2, 14) and (6, 9).

Answer»

Hey mate...

Here's your answer

so if two lines are parallel then their slopes would be equal. so if we prove that their slopes are equal then they are parallel.

SLOPE OF (-1,1) AND (-9,6)

y2-y1/x2-x1=6-1)/(-9)-(-1)

=6-1/-9+1=5/-8=[-5/8]-------(1)

SLOPE OF (-2,14) AND (6,9)

y2-y1/x2-x1=9-14/6-(-2)

=[-5/8]---------------------(2)

(1) and (2) are equal ..SINCE the slopes are equal .,therefore the lines are parallel..

hope it help you..please MARK this as brainliest.....

Discussion

47.	The total number of odd factors of 2⁵3³5²
Answer» ANSWER: HEY MATE here is your answer 2⁵3³5² (30)^5+3+2 (30)^10

47.

The total number of odd factors of 2⁵3³5²

Answer»

ANSWER:

HEY MATE here is your answer

2⁵*3³*5²

(30)^5+3+2

(30)^10

Discussion

48.	In figure. AB is a diameter of a circle with centre O. If /_ABC = 70°, /_CAD = 30° and /_BAE=60°, find /_BAC, /€ACD and /_ABE.
Answer» ANSWER: PLZ DRAW the CIRCLE CORRECTLY

48.

In figure. AB is a diameter of a circle with centre O. If /_ABC = 70°, /_CAD = 30° and /_BAE=60°, find /_BAC, /€ACD and /_ABE.

Answer»

ANSWER:

PLZ DRAW the CIRCLE CORRECTLY

Discussion

49.	6. Find a rational number which is 29/75- more than-11/25
Answer» ANSWER: TAKE Lcm 75,25 15,5 3,1 1,1 28 19/28 44/28 63/28 64/28

49.

6. Find a rational number which is 29/75- more than-11/25

Answer»

ANSWER:

TAKE Lcm

75,25

15,5

3,1

1,1

28

19/28

44/28

63/28

64/28

Discussion

50.	If 2x^2+kx-10 is divisible by x-2, what is the value of k?
Answer» Answer: place the VALUE of x=2 in the equation Step-by-step explanation: then put the equation =0 and only k will be left. Due to shortage of time I am not giving answer but only TELLING the way and you will GET your answer

50.

If 2x^2+kx-10 is divisible by x-2, what is the value of k?

Answer»

Answer:

place the VALUE of x=2 in the equation

Step-by-step explanation:

then put the equation =0 and only k will be left.

Due to shortage of time I am not giving answer but only TELLING the way

and you will GET your answer

Discussion

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