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breath is 30 cmand length is 45 cm

length is 14 cm and b is 13 cm

35 percentage of 40= 40*35/100= 14 girls26 boys

100°=angle D (vertically opposite)as angle D=angle B=100°(alternative interior angles) angle B=angle B=100°(alternative interior angles)angle besides to 100°=80°(straight line)as angle 80° =angle A=80°(alternative interior angles)

angle A=80°angle B=100°angle C=100°angle D=100°

aA=80°aB=100°aC=100°aD=100°

aA=80 degree aB=100 degree aC=100 degreeaD=100 degree

Angle A= 80° Angle B=100° Angle C=100° Angle D=100°

aA=80° aB=100° aC=100° aD=100°

<A = 80,<B = 100,<C= 100,<D = 100 is right answer

Sin 3A = cos (A-6)

sin 3A = sin (90-(A-6))

( since sin(90- A) = cos A)

therefore,

3A = 90-(A-6)

3A = 90-A+6

3A+A = 96

4A = 96

A = 96/4

A = 24

(-4×12-3×4+7×3)/60=(-48-12+21)/60=-39/60=-13/20

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In the class boys are=38 & girls are=27. so The total students in the class are=38+27.

The total number of pupils are 65. *

1

2

the triangles PTS and PQR, let us assume that Q = angle 3 and R = angle 4.

So, angle 1 = angle 3 (corresponding angles)

and angle 2 = angle 4 (corresponding angles)

Angle P is common angle.

By AAA similarity triangle PTS is similar to PQR.

Hence proved

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yes it is right

what is the difference between 40% of 60 and 60% of 40?

bcz AB ll DC

z =180-130 =50x = 130y = 130

Let the number of be 3x and number of girls be 5x

Then,3x = 240x = 240/3 = 80

Therefore, total number of pupil in school = 3x + 5x = 8x= 8*8 = 640

(B) is correct option

a = 1, b = 2, c = - 9

b^2 - 4ac = 2^2 - 4*1*-9D = 4 - (-36)D = 40

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thank u ... ☺☺

(a²+b²)x²+2(ac+bd)x+(c²+d²)=0a=(a²+b²) b=2(ac+bd) c=(c²+d²)putting a,b,c in formula[-b +/-√(b²-4ac)]/2a{-2(ac+bd) +/-√[4(ac+bd)²-4(a²+b²)(c²+d²)]}/2(a²+b²)[-2(ac+bd) +/-√4a²c²+4b²d²+8abcd-4a²c²-4a²d²-4b²c²-4b²d²]/2(a²+b²)-2(ac+bd) +/-√ - (4a²d²-8abcd+4b²c²)Hence root cant be negative.So, it has no real roots.

4x² +4bx -(a² -b²) = 0

4x² +4bx -a² + b² =0

(2x)² + 2.(2x).b + b² -a² =0

(2x + b)² -a² = 0

use formula,

a²-b² = (a -b)(a + b)

{2x + b -a}{2x + b +a} =0

Therefore, x = (a - b)/2 , - (a + b)/2

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please like my answer if you find it useful

c answer a/10 ka 20% was the answer

(5/3)^-(n-1)=( 5/3)^n-3n-3= -n+12n= 4n = 2

{((x^(-5))^(2/3)}^(-3/10)

{x^(-10/3)}^(-3/10)

x^1

=x

x-y=30 →equation 1

x+y+40 = 180 (since sum of angles of a triangle = 180)

x+y=140 →equation 2 (variables on one side,constants on one side)

equation 1 → x-y=30

equation 2 → x+y=140

⇒ 2x= 170 (∵ -y+y=0)

⇒x = 170/2

⇒ x = 85

substitute x in equation 1 (or equation 2.its your choice. you'll get the same answer)

equation 1 → x-y=30

85-30 = y (substituting x and bringing 30 on one side and y on one side)

55 = y

∴x=85

y=55