Question

Read it and solve it for me

Answer 1

Answer:

a. y + 9 + x + y + x + 4 + x + 5 = 2x + 2y + 18

b. 30.4cm

c. Area of big rectangle = 9y cm², Area of small rectangle = 4x cm²

d. a = 9y + 4x

e. a = 38.8

Step-by-step explanation:

a. Perimeter = y + 9 + x + y + x + 4 + x + 5

                     = x + x + y + y + 9 + 4 + 5

                     = 2x + 2y + 18

b. 2x + 2y + 18 = 2(3.4) + 2(2.8) + 18

                        = 6.8 + 5.6 + 18

                        = 30.4cm

c. Formula for area of rectangle: length × breadth

Area of big rectangle = 9 × y

                                    = 9y cm²

Area of small rectangle = 4 × x

                                       = 4x cm²

d. a cm² = (9y + 4x)cm²

e. a = 9y + 4x

      = 9(2.8) + 4(3.4)

      = 25.2 + 13.6

      = 38.8