Question

I need help :( math is my weakest spot.

Answer 1

Answer:

Step-by-step explanation:

a) Perimeter of triangle = x - 3 + 4x + 3 + 3x - 5

 = 8x - 5

Perimeter of rectangle = 2 * (2x + 2) + 2* (4x - 1/2 )

                  = 4x + 4 + 8x - 1

                  = 12x + 3

b) 8x - 5 : 12x + 3 = 5 :9

9* ( 8x - 5) = 5 * ( 12x + 3)

72x - 45 = 60x + 15

72x - 60x = 15 + 45

12x = 60

x = 60/12

x = 5

c) 2x + 2 = 2*5 + 2 = 10 +2 =12

4x - 1/2 = 4*5 - 1/2 = 20 - 1/2 = (40- 1)/2 = 39/2

Area of rectangle = length * width = 12 * 39/2 = 6 * 39

= 234 Sq.cm