332354 + Interview Questions in Secondary School in Math Page 396 InterviewSolution

19751.	If Triangle ABC,if a=2, b=3 and sin A=2/3, then
Answer» Answer: The VALUE of ANGLE B is $\dfrac{\pi }{4}$ Step-by-step explanation: Given as : For any TRIANGLE ABC a = 2 b = 3 Sin A = $\dfrac{2}{3}$ Let The value of ∠B = x° According to question By Applying Sin Law , we get $\dfrac{a}{SinA}$ = $\dfrac{b}{SinB}$ = $\dfrac{c}{SinC}$ Or, $\dfrac{a}{SinA}$ = $\dfrac{b}{SinB}$ Or, $\dfrac{2}{\dfrac{2}{3} }$ = $\dfrac{3}{SinB}$ Or, $\dfrac{6}{2}$ = $\dfrac{3}{SinB}$ or, $\dfrac{3}{SinB}$ = 3 ∴ Sin B = $\dfrac{3}{3}$ i.e Sin B = 1 Or, B = $Sin^{-1}$ 1 So, B = $\dfrac{\pi }{4}$ So, The value of angle B = $\dfrac{\pi }{4}$ Hence , The value of angle B is $\dfrac{\pi }{4}$ Answer

19751.

If Triangle ABC,if a=2, b=3 and sin A=2/3, then

Answer»

Answer:

The VALUE of ANGLE B is $\dfrac{\pi }{4}$

Step-by-step explanation:

Given as :

For any TRIANGLE ABC

a = 2

b = 3

Sin A = $\dfrac{2}{3}$

Let The value of ∠B = x°

According to question

By Applying Sin Law , we get

$\dfrac{a}{SinA}$ = $\dfrac{b}{SinB}$ = $\dfrac{c}{SinC}$

Or, $\dfrac{a}{SinA}$ = $\dfrac{b}{SinB}$

Or, $\dfrac{2}{\dfrac{2}{3} }$ = $\dfrac{3}{SinB}$

Or, $\dfrac{6}{2}$ = $\dfrac{3}{SinB}$

or, $\dfrac{3}{SinB}$ = 3

∴ Sin B = $\dfrac{3}{3}$

i.e Sin B = 1

Or, B = $Sin^{-1}$ 1

So, B = $\dfrac{\pi }{4}$

So, The value of angle B = $\dfrac{\pi }{4}$

Hence , The value of angle B is $\dfrac{\pi }{4}$ Answer

Discussion

19752.	Area of the figure plzzzzzzzzzzzzzzzzzzz
Answer» Answer: I am just TELLING u the steps = FIRST find the area of the rectangle =Then find both of the TRIANGLES area = Then ADD all the areas

19752.

Area of the figure plzzzzzzzzzzzzzzzzzzz

Answer»

Answer:

I am just TELLING u the steps

= FIRST find the area of the rectangle

=Then find both of the TRIANGLES area

= Then ADD all the areas

Discussion

19753.	[(-3/5)^4X(-3/5)^2]÷[9/25]^2
Answer» ANSWER: (81\625)(9/25)*(625/81) =9/25

19753.

[(-3/5)^4X(-3/5)^2]÷[9/25]^2

Answer»

ANSWER:

(81\625)(9/25)*(625/81)

=9/25

Discussion

19754.	The solution set of the equation x^3+x=0
Answer» ANSWER: X[X^2+1]=0 EITHER X=0 OR X^2=-1 X=±√-1 HENCE SET OF VALUES OF X ARE 0,-i,i HENCE Step-by-step explanation:

19754.

The solution set of the equation x^3+x=0

Answer»

ANSWER:

X[X^2+1]=0

EITHER X=0 OR X^2=-1

X=±√-1

HENCE SET OF VALUES OF X ARE 0,-i,i

HENCE

Step-by-step explanation:

Discussion

19755.	Solve the following quadratic equations using quadratic formula 6x²-19x+15=0
Answer» ANSWER: D=b^2 - 4ac=361-4615=361-360=1 Step-by-step EXPLANATION: x=-b+/-root d/2a x=19+/-1/2*6 x=19+1/12,19-1/12 X=20/12,18/12 x=5/4,3/2 is the answer

19755.

Solve the following quadratic equations using quadratic formula 6x²-19x+15=0

Answer»

ANSWER:

D=b^2 - 4ac=361-4*6*15=361-360=1

Step-by-step EXPLANATION:

x=-b+/-root d/2a

x=19+/-1/2*6

x=19+1/12,19-1/12

X=20/12,18/12

x=5/4,3/2 is the answer

Discussion

19756.	When the length of the ship is 25 the mast is 15 metres high.what will be the height of the mast, if the ship is 20 metres long
Answer» Answer: height of the mast is 12 m Step-by-step explanation: using cross MULTIPLICATION, we can FIND the height of the mast when the length of the ship is 25 m the mast is 15 m high 25----->15 height of the mast, if the ship is 20 m long is 20----->? =20 x 15 / 25 =12 m height of the mast is 12 m

19756.

When the length of the ship is 25 the mast is 15 metres high.what will be the height of the mast, if the ship is 20 metres long

Answer»

Answer:

height of the mast is 12 m

Step-by-step explanation:

using cross MULTIPLICATION, we can FIND the height of the mast

when the length of the ship is 25 m the mast is 15 m high

25----->15

height of the mast, if the ship is 20 m long is

20----->?

=20 x 15 / 25

=12 m

height of the mast is 12 m

Discussion

19757.	SS VIIIMensuration-1\| (Volumes and Surface Areas of a Cuboid and a Cube)21.2315 A cuboid has total surface area of 50 m' and lateral surface area is 30 m2. Find the areaof its base.
Answer» Answer: We have to APPLY the FORMULA of volume and surface area then U GET the answer

19757.

SS VIIIMensuration-1| (Volumes and Surface Areas of a Cuboid and a Cube)21.2315 A cuboid has total surface area of 50 m' and lateral surface area is 30 m2. Find the areaof its base.

Answer»

Answer:

We have to APPLY the FORMULA of volume and surface area then U GET the answer

Discussion

19758.	Plzzz answer it fastt....
Answer» Step-by-step EXPLANATION: The TOTAL explanation is GIVEN in the above image. Hope it will HELP you

19758.

Plzzz answer it fastt....

Answer»

Step-by-step EXPLANATION:

The TOTAL explanation is GIVEN in the above image.

Hope it will HELP you

Discussion

19759.	How to do can any one say answer of this
Answer» Sorry MATE ! I can't understand UR HANDWRITING

19759.

How to do can any one say answer of this

Answer»

Sorry MATE !

I can't understand UR HANDWRITING

Discussion

19760.	What must be subtracted from a3 - 4a2 + 6 to abtain a2 - 2a + 1 ?
Answer» ANSWER: ^_^_^_^_^_^ Let x should be subtracted, a^3 - 4a^2 + 5A - 6 - x = a^2 - 2A + 1 => a^3 - 4a^2 + 5a - 6 - a^2 + 2a - 1 = x => a^3 - 4a^2 - a^2 + 5a + 2a - 6 - 1 = x => a^3 - 5a^2 + 7a - 7 = x Hence. a^3 - 5a^2 + 7a - 7 should be subtracted.

19760.

What must be subtracted from a3 - 4a2 + 6 to abtain a2 - 2a + 1 ?

Answer»

ANSWER:

^_^_^_^_^_^

Let x should be subtracted,

a^3 - 4a^2 + 5A - 6 - x = a^2 - 2A + 1

=> a^3 - 4a^2 + 5a - 6 - a^2 + 2a - 1 = x

=> a^3 - 4a^2 - a^2 + 5a + 2a - 6 - 1 = x

=> a^3 - 5a^2 + 7a - 7 = x

Hence. a^3 - 5a^2 + 7a - 7 should be subtracted.

Discussion

19761.	Pls do find ans. .to this ques....pls.....pls..
Answer» ANSWER: could u PLEASE PROVIDE the ANSWERS so that i can give u the DETAIL of these answers

19761.

Pls do find ans. .to this ques....pls.....pls..

Answer»

ANSWER:

could u PLEASE PROVIDE the ANSWERS so that i can give u the DETAIL of these answers

Discussion

19762.	Change 0.65 into a percentage
Answer» Answer: 0.65/100=0.65%

19762.

Change 0.65 into a percentage

Answer»

Answer:

0.65/100=0.65%

Discussion

19763.	A swimming pool is 24 m in length, 16 m in breadth and 3 m in depth. Find the cost of cementingits floor and four walls at the rate of ₹40 per m^2
Answer» Answer: TSA - 2(24 x 3) + (2× 3) 2 TSA = 2× 72 + 6 × 2 TSA = 156m² total cost = 156 × 40 = 6240 RS.

19763.

A swimming pool is 24 m in length, 16 m in breadth and 3 m in depth. Find the cost of cementingits floor and four walls at the rate of ₹40 per m^2

Answer»

Answer:

TSA - 2(24 x 3) + (2× 3) 2

TSA = 2× 72 + 6 × 2

TSA = 156m²

total cost = 156 × 40 = 6240 RS.

Discussion

19764.	Kendriya. 65 into a percentage
Answer» ANSWER: PLS ELABORATE UR QUESTION

19764.

Kendriya. 65 into a percentage

Answer»

ANSWER:

PLS ELABORATE UR QUESTION

Discussion

19765.	D the value of x, if:2* + 2* + 2* = 192
Answer» 2x+2x+2x=192 6x=192 X=192/6 X=32 MARK IT AS BRAINLIEST

19765.

D the value of x, if:2* + 2* + 2* = 192

Answer»

2x+2x+2x=192

6x=192

X=192/6

X=32

MARK IT AS BRAINLIEST

Discussion

19766.	The cubes of edge 6 cm each are joined end to end to form a cuboid. Find the surfaceerea of the cuboid so formed
Answer» ANSWER: 6a2=6×6×6=216 is it answer

19766.

The cubes of edge 6 cm each are joined end to end to form a cuboid. Find the surfaceerea of the cuboid so formed

Answer»

ANSWER:

6a2=6×6×6=216 is it answer

Discussion

19767.	Volume of metal used in making a hemisphere is generally found by using formula
Answer» ANSWER: ^_^ Step-by-step explanation: we LEARNED that the volume of a hemisphere is how much space is inside of HALF of a sphere. The formula to find the volume of a hemisphere is 2TTr3 / 3, where pi is 3.14, and the RADIUS is half of the diameter.

19767.

Volume of metal used in making a hemisphere is generally found by using formula

Answer»

ANSWER:

^_^

Step-by-step explanation:

we LEARNED that the volume of a hemisphere is how much space is inside of HALF of a sphere. The formula to find the volume of a hemisphere is 2TTr3 / 3, where pi is 3.14, and the RADIUS is half of the diameter.

Discussion

19768.	a pair of shoes was sold at a gain 20% had it been sold for hundred more than gain should have been 25% find the cost price of the pair of the shoes
Answer» Step-by-step explanation: we will TAKE sp - X then we will CP= 120 /100x + 100= cp = 125/100x 6x/5+100=5x/4 6x/5 -5x /4 = -100 -1x/20= -100 -1x =-10020 -1x = -2000 x= 2000 sp = 2000 cp= 125/1002000 cp = 2500

19768.

a pair of shoes was sold at a gain 20% had it been sold for hundred more than gain should have been 25% find the cost price of the pair of the shoes

Answer»

Step-by-step explanation:

we will TAKE sp - X

then we will

CP= 120 /100*x + 100= cp = 125/100*x

6x/5+100=5x/4

6x/5 -5x /4 = -100

-1x/20= -100

-1x =-100*20

-1x = -2000

x= 2000

sp = 2000

cp= 125/100*2000

cp = 2500

Discussion

19769.	Calculat the median of first prime numbers less than 20
Answer» ANSWER: 8 is the CORRECT answer..... HOPE this HELPS ..❤️

19769.

Calculat the median of first prime numbers less than 20

Answer»

ANSWER:

8 is the CORRECT answer.....

HOPE this HELPS ..❤️

Discussion

19770.	Given a line ABCD in which AB = BC = CD,B = (0, 3) and C = (1, 8).Find the co-ordinates of A and D.
Answer» ANSWER: it is WRITE answer HOPE it will HELP you

19770.

Given a line ABCD in which AB = BC = CD,B = (0, 3) and C = (1, 8).Find the co-ordinates of A and D.

Answer»

ANSWER:

it is WRITE answer HOPE it will HELP you

Discussion

19771.	(ii) On 1st January 2016, Sanika decides to save 10, 11 on second day, 10on third day. If she decides to save like this, then on 31st December 2012what would be her total savings?
Answer» ANSWER: It WOULD be 2016 not 2012 mark as brainliest

19771.

(ii) On 1st January 2016, Sanika decides to save 10, 11 on second day, 10on third day. If she decides to save like this, then on 31st December 2012what would be her total savings?

Answer»

ANSWER:

It WOULD be 2016 not 2012

mark as brainliest

Discussion

19772.	A man purchase 100 copies of a book from publisher and discount of 25% He buys 50 copes of a book from retailer he got a 10 % discount. He got a overall discount is
Answer» Answer: 35 Step-by-step EXPLANATION: DISCOUNT= 25+10 =overall discount is $35

19772.

A man purchase 100 copies of a book from publisher and discount of 25% He buys 50 copes of a book from retailer he got a 10 % discount. He got a overall discount is

Answer»

Answer:

35

Step-by-step EXPLANATION:

DISCOUNT= 25+10

=overall discount is $35

Discussion

19773.	Find the value of a cube of Edge is to 6
Answer» ANSWER: tsa=6a^2 =6(6)^2=6(36)=216

19773.

Find the value of a cube of Edge is to 6

Answer»

ANSWER:

tsa=6a^2

=6(6)^2=6(36)=216

Discussion

19774.	Find xif(a) I"11'11"
Answer» kdjskbdnbskaakakansnndndnnnxndndjdjdnd

19774.

Find xif(a) I"11'11"

Answer»

kdjskbdnbskaakakansnndndnnnxndndjdjdnd

Discussion

19775.	SEE THE IMAGE AND ANSWER IT.
Answer» MARK IT AS BRAINLIEST

19775.

SEE THE IMAGE AND ANSWER IT.

Answer»

MARK IT AS BRAINLIEST

Discussion

19776.	anyone is there who studyies in vidyapeeth university and doing b.com of 1st year then pls tell me the datesheet of exams pls pls it's urgent
Answer» ANSWER: No i don't studyv in this UNIVERSITY

19776.

anyone is there who studyies in vidyapeeth university and doing b.com of 1st year then pls tell me the datesheet of exams pls pls it's urgent

Answer»

ANSWER:

No i don't studyv in this UNIVERSITY

Discussion

19777.	If x+y=9 & x = 20 find the value of x²+y²
Answer» Answer: 20+y=9 y=-11 x^2+y^2=(20)^2+(-11)^2 =400+121 =521 I HOPE it's CORRECT mark me as BRAINLIEST and follow me friends

19777.

If x+y=9 & x = 20 find the value of x²+y²

Answer»

Answer:

20+y=9

y=-11

x^2+y^2=(20)^2+(-11)^2

=400+121

=521

I HOPE it's CORRECT

mark me as BRAINLIEST and follow me friends

Discussion

19778.	25 boxes of 12 pencils each cost rupees 750 find the cost of 32 boxes of 8 pencils each
Answer» Answer: 25 packets of 12 each = 300 pencils for Rs 750 Rs 750/300=Rs 2.5/pencil 32 packets of 8 each 8(32)= 256 pencils Rs 2.5/pencil(256 pencils)= Rs 640 32 packets of 8 pencils each WOULD COST Rs 640

19778.

25 boxes of 12 pencils each cost rupees 750 find the cost of 32 boxes of 8 pencils each

Answer»

Answer:

25 packets of 12 each = 300 pencils for Rs 750

Rs 750/300=Rs 2.5/pencil

32 packets of 8 each 8(32)= 256 pencils

Rs 2.5/pencil(256 pencils)= Rs 640

32 packets of 8 pencils each WOULD COST Rs 640

Discussion

19779.	Can anyone solve this problem
Answer» Answer: 31 and 33 are the TWO CONSECUTIVE ODD NUMBERS.....

19779.

Can anyone solve this problem

Answer»

Answer:

31 and 33 are the TWO CONSECUTIVE ODD NUMBERS.....

Discussion

19780.	the sum of the digits of a two digit number is 3 if the digits are reversed the new number is 9 less than the number what is the number
Answer»

Discussion

19781.	Find the area of a square of side 14 cm and 17 cm
Answer» ANSWER: formula USED: area of square = SIDE x side area of square with side 14 CM = 14 x 14 = 196 cm^2 area of square with side 17 cm = 17 x 17 = 289 cm^2

19781.

Find the area of a square of side 14 cm and 17 cm

Answer»

ANSWER:

formula USED:

area of square = SIDE x side

area of square with side 14 CM = 14 x 14 = 196 cm^2

area of square with side 17 cm = 17 x 17 = 289 cm^2

Discussion

19782.	Find the ratio in which the line segment obtained by joining 4 ,5 and 7 - 1 is divided by straight line 5 x + 4 Y is equal to 4
Answer» find the ratio in which the LINE SEGMENT obtained by JOINING 4 , 5 and 7 - 1 is divided by STRAIGHT line 5 x + 4 Y is equal to 4

19782.

Find the ratio in which the line segment obtained by joining 4 ,5 and 7 - 1 is divided by straight line 5 x + 4 Y is equal to 4

Answer»

find the ratio in which the LINE SEGMENT obtained by JOINING 4 ,

5 and 7 - 1 is divided by STRAIGHT line 5 x + 4 Y is equal to 4

Discussion

19783.	Find the simplest form of 2.5 liter and 750 ml
Answer» Step-by-step explanation: 2.5litre ×1000=250ml 750 ml =250/750 =1/5

19783.

Find the simplest form of 2.5 liter and 750 ml

Answer»

Step-by-step explanation:

2.5litre ×1000=250ml

750 ml

=250/750

=1/5

Discussion

19784.	Find the value of m for which x²-mx-1=0has equal roots
Answer» HOPE this helps.... All the BEST to everyone GIVING ICSE boards❤

19784.

Find the value of m for which x²-mx-1=0has equal roots

Answer»

HOPE this helps....

All the BEST to everyone GIVING ICSE boards❤

Discussion

19785.	Eliminate θ, if(1) x = a sec , y = b tan e.(ii) X = 2 cos θ - 3 sin θ, y = cos θ + 2 sin θ(iii) x = 3 cosecθ + 4 cotθ, y = 4cosecθ - 3 cot θ
Answer» ANSWER: for 1st ONE U use ellipse formula x^2/a^2+y^2/b^2=1 u can ELIMINATE theta from that

19785.

Eliminate θ, if(1) x = a sec , y = b tan e.(ii) X = 2 cos θ - 3 sin θ, y = cos θ + 2 sin θ(iii) x = 3 cosecθ + 4 cotθ, y = 4cosecθ - 3 cot θ

Answer»

ANSWER:

for 1st ONE U use ellipse formula x^2/a^2+y^2/b^2=1 u can ELIMINATE theta from that

Discussion

19786.	Find area enclosed between 2 concentric circles with radious 14 cm and 16 cm.
Answer» AREA ENCLOSED WOULD be area of BIGGER circle-area of SMALLER circle piR^2_pir^2 3.14×16×16-3.14×14×14 3.14(256-196) 3.14×60 =188.4cm^2

19786.

Find area enclosed between 2 concentric circles with radious 14 cm and 16 cm.

Answer»

AREA ENCLOSED WOULD be area of BIGGER circle-area of SMALLER circle

piR^2_pir^2

3.14×16×16-3.14×14×14

3.14(256-196)

3.14×60

=188.4cm^2

Discussion

19787.	Find the length of diagonal of a square whose side is 16cm
Answer» ANSWER: It is ALSO 16.All the DIAGONALS and SIDES of a equare are EQUAL

19787.

Find the length of diagonal of a square whose side is 16cm

Answer»

ANSWER:

It is ALSO 16.All the DIAGONALS and SIDES of a equare are EQUAL

Discussion

19788.	The internal measure of cuboidal room are 12m× 8m×4m×.find the total cost of whitewashing all four walls of a room, if the cost of white washing is rs5per m^2 .what will be the cost of white washing if the ceiling of the room is also whitewashed.
Answer» ANSWER : $\bold{Cost\:of\:whitewashing\:4\:walls = Rs.800}$ $\bold{Total\: Cost = Rs. 1280 }$ Step-by-step EXPLANATION: $\bf\red{Given:-}\begin{cases}\sf\red{Length = 12\:m}\\\sf\green{Breadth=8\:m}\\\sf\orange{Height = 4\:m}\\\sf\green{Rate = Rs.5 \: per\:{m}^{2} }\end{cases}$ $\bf\red{To\:find:-}\begin{cases}\sf\green{Cost\:of\:whitewashing\;4\:walls=?}\\\sf\purple{Cost\:of\:whitewashing\:including\:ceiling=?}\end{cases}$ $\rule{300}{1}$ $\bigstar\sf\red{ We\:know\:that:-}$ ${\boxed{\sf\green{Area\:of\:4\:walls = 2(l + b)\times h}}}$ $\longrightarrow\sf\green{Area\:of\:4\:walls = 2(12 + 8)\times 4 }\\\\\longrightarrow\sf\red{Area\:of\:4\:walls = 2 \times 20 \times 4} \\\\\longrightarrow\sf\purple{Area\:of\:4\:walls = 160\:{m}^{2} }$ $\bigstar\sf\green{\ Cost\:of\:whitewashing = Area \times Rate } \\\\\longrightarrow\sf\red{Cost\:of\:whitewashing =Rs. (160 \times 5) } \\\\\longrightarrow\underline{\boxed{\bold{Cost\:of\:whitewashing = Rs.800}}}$ $\rule{100}{2}$ $\sf\red{We\:know\:that,}$ $\bigstar \ \underline{\boxed{\bold{Area\:of\:ceiling = l \times b}}}$ $\longrightarrow\sf\green{Area\:of\:ceiling = 12 \times 8 }\\\\\longrightarrow\sf\orange{Area\:of\:ceiling = 96\:{m}^{2}}$ $\bigstar\bold{\ Cost = Area \times Rate} \\\\\longrightarrow\sf\red{Cost = Rs.(96\times 5) } \\\\\longrightarrow\underline{\boxed{\bold{Cost = Rs.480 }}}$ $\rule{100}{2}$ $\bigstar\sf{\ Total\:cost = Rs.(800 + 480)} \\\\\longrightarrow\underline{\boxed{\bold{Total\:cost = Rs.1280}}}$

19788.

The internal measure of cuboidal room are 12m× 8m×4m×.find the total cost of whitewashing all four walls of a room, if the cost of white washing is rs5per m^2 .what will be the cost of white washing if the ceiling of the room is also whitewashed.

Answer»

ANSWER :

$\bold{Cost\:of\:whitewashing\:4\:walls = Rs.800}$

$\bold{Total\: Cost = Rs. 1280 }$

Step-by-step EXPLANATION:

$\bf\red{Given:-}\begin{cases}\sf\red{Length = 12\:m}\\\sf\green{Breadth=8\:m}\\\sf\orange{Height = 4\:m}\\\sf\green{Rate = Rs.5 \: per\:{m}^{2} }\end{cases}$

$\bf\red{To\:find:-}\begin{cases}\sf\green{Cost\:of\:whitewashing\;4\:walls=?}\\\sf\purple{Cost\:of\:whitewashing\:including\:ceiling=?}\end{cases}$

$\rule{300}{1}$

$\bigstar\sf\red{ We\:know\:that:-}$

${\boxed{\sf\green{Area\:of\:4\:walls = 2(l + b)\times h}}}$

$\longrightarrow\sf\green{Area\:of\:4\:walls = 2(12 + 8)\times 4 }\\\\\longrightarrow\sf\red{Area\:of\:4\:walls = 2 \times 20 \times 4} \\\\\longrightarrow\sf\purple{Area\:of\:4\:walls = 160\:{m}^{2} }$

$\bigstar\sf\green{\ Cost\:of\:whitewashing = Area \times Rate } \\\\\longrightarrow\sf\red{Cost\:of\:whitewashing =Rs. (160 \times 5) } \\\\\longrightarrow\underline{\boxed{\bold{Cost\:of\:whitewashing = Rs.800}}}$

$\rule{100}{2}$

$\sf\red{We\:know\:that,}$

$\bigstar \ \underline{\boxed{\bold{Area\:of\:ceiling = l \times b}}}$

$\longrightarrow\sf\green{Area\:of\:ceiling = 12 \times 8 }\\\\\longrightarrow\sf\orange{Area\:of\:ceiling = 96\:{m}^{2}}$

$\bigstar\bold{\ Cost = Area \times Rate} \\\\\longrightarrow\sf\red{Cost = Rs.(96\times 5) } \\\\\longrightarrow\underline{\boxed{\bold{Cost = Rs.480 }}}$

$\rule{100}{2}$

$\bigstar\sf{\ Total\:cost = Rs.(800 + 480)} \\\\\longrightarrow\underline{\boxed{\bold{Total\:cost = Rs.1280}}}$

Discussion

19789.	If Dx= -18, Dy= -15 and D= 3 are the values of the determinants for certain simultaneous equations in x and y. Find x and y.
Answer» Step-by-step explanation: X=Dx/D X=-18/3 X=-6 Y=Dy/D Y=-15/3 Y=-5 (x,y)=(-6, -5) If you LIKE then mark as BRAINALIST answer

19789.

If Dx= -18, Dy= -15 and D= 3 are the values of the determinants for certain simultaneous equations in x and y. Find x and y.

Answer»

Step-by-step explanation:

X=Dx/D

X=-18/3

X=-6

Y=Dy/D

Y=-15/3

Y=-5

(x,y)=(-6, -5)

If you LIKE then mark as BRAINALIST answer

Discussion

19790.	Form quadratic equation whose roots are a + b and a minus b
Answer» ROOTS of EQUATION =(a+b)(a-b) SUM of roots = a+b+a-b = 2a Product of roots = a+b*a-b = a²-b² Equation = x²- 2ax + a²-b²

19790.

Form quadratic equation whose roots are a + b and a minus b

Answer»

ROOTS of EQUATION =(a+b)(a-b)

SUM of roots = a+b+a-b = 2a

Product of roots = a+b*a-b = a²-b²

Equation = x²- 2ax + a²-b²

Discussion

19791.	Find the value of(x-y), if x+y = 11 and xy=28
Answer» Step-by-step EXPLANATION: HOPE MAY this may HELP U

19791.

Find the value of(x-y), if x+y = 11 and xy=28

Answer»

Step-by-step EXPLANATION:

HOPE MAY this may HELP U

Discussion

19792.	Find the value of m for which 5x²-3x+m=0has equal roots
Answer» For EQUAL ROOTS B square-4ac should be equal to zero -3square -4×5×m=0 9-20m=0 20m=9 So m=9/20 Mark it as BRAINLIEST if you are SATISFIED

19792.

Find the value of m for which 5x²-3x+m=0has equal roots

Answer»

For EQUAL ROOTS B square-4ac should be equal to zero

-3square -4×5×m=0

9-20m=0

20m=9

So m=9/20

Mark it as BRAINLIEST if you are SATISFIED

Discussion

19793.	[OR]The centroid of ABC is at origin. If the points B and C are respectively(0, 4,0 ) and (0,0,4) then the point A is
Answer» ANSWER: $the \: answer \: is \tan(y \sqrt[ \times 4613400]{?} )$

19793.

[OR]The centroid of ABC is at origin. If the points B and C are respectively(0, 4,0 ) and (0,0,4) then the point A is

Answer»

ANSWER:

$the \: answer \: is \tan(y \sqrt[ \times 4613400]{?} )$

Discussion

19794.	In the adjoining figure name all the angles
Answer» ANSWER: Step-by-step EXPLANATION: MARK ME AS BEST

19794.

In the adjoining figure name all the angles

Answer»

ANSWER:

Step-by-step EXPLANATION:

MARK ME AS BEST

Discussion

19795.	154 x 18333 x 52 x 122
Answer» Answer: 21252 209352 Step-by-step EXPLANATION: MARK me as BRAINLIEST and FOLLOW me FRIENDS

19795.

154 x 18333 x 52 x 122

Answer»

Answer:

21252

209352

Step-by-step EXPLANATION:

MARK me as BRAINLIEST and FOLLOW me FRIENDS

Discussion

19796.	(ii) x3 - yº = (x - y) (x2 + xy + y2)Iw2rat 2)you have to verify it
Answer» Step-by-step EXPLANATION: this is CORRECT x3-y3=(x-y)(x2+xy+y2)

19796.

(ii) x3 - yº = (x - y) (x2 + xy + y2)Iw2rat 2)you have to verify it

Answer»

Step-by-step EXPLANATION:

this is CORRECT x3-y3=(x-y)(x2+xy+y2)

Discussion

19797.	Can anyone tell me the answer for this question
Answer» ANSWER: -1/7 is the answer Step-by-step EXPLANATION: -1/49 × 7 =-1/7

19797.

Can anyone tell me the answer for this question

Answer»

ANSWER:

-1/7 is the answer

Step-by-step EXPLANATION:

-1/49 × 7

=-1/7

Discussion

19798.	draw an isoceleus triangle with base 5 cm and height 4 cm draw a triangle similar to the triangle drawn whose sides are ⅔ times the sides of the triangle
Answer» Step-by-step EXPLANATION: হাই কিভাবে হয় আপনি কিভাবে কিআপনি কি বাতো আমার পুচু টুজে হাই কিভাবে হয় ইয়ো

19798.

draw an isoceleus triangle with base 5 cm and height 4 cm draw a triangle similar to the triangle drawn whose sides are ⅔ times the sides of the triangle

Answer»

Step-by-step EXPLANATION:

হাই কিভাবে হয় আপনি

কিভাবে কিআপনি কি

বাতো আমার পুচু টুজে হাই কিভাবে হয় ইয়ো

Discussion

19799.	if each side of an equal triangle in a unit then find the aera of a triangle by using heron'& formula
Answer» as side = a unit s=( a+a+a)/2 s = 3a/2 by herons formula, AREA = √s(s-a) (s-b) (s-c) = √3a/2 (3a/2-a)(3a/2-a)(3a/2-a) =√ 3a/2( 3a/2- a) = √ 3a/2( 3a-a/ 2) = √ 3a/2 X 2a/2 = √ 6a²/ 4 =√ 3 a²/2

19799.

if each side of an equal triangle in a unit then find the aera of a triangle by using heron'& formula

Answer»

as side = a unit

s=( a+a+a)/2

s = 3a/2

by herons formula,

AREA = √s(s-a) (s-b) (s-c)

= √3a/2 (3a/2-a)(3a/2-a)(3a/2-a)

=√ 3a/2( 3a/2- a)

= √ 3a/2( 3a-a/ 2)

= √ 3a/2 X 2a/2

= √ 6a²/ 4

=√ 3 a²/2

Discussion

19800.	In this fig find x and y.
Answer» angle y + 70°+ 50°= 180° {ANGLES on straight line} angle y=180-120=>60° *angle y = 60° angle X= 180°-(y+50) =>180°-110=> 70° angle x= 70° Answer:* hope it helps...

19800.

In this fig find x and y.

Answer»

angle y + 70°+ 50°= 180° {ANGLES on straight line}

angle y=180-120=>60°

***angle y = 60°

angle X= 180°-(y+50)

=>180°-110=> 70°

***angle x= 70°

Answer:

hope it helps...

Discussion

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