Which expression is equivalent to 27 + 15? A 3 × (9 + 15) B 3 × (9 + 5) C 9 × (3 + 15) D 9 × (3 + 5)

Your answer is b

Step-by-step explanation:

27 + 15= 42

a- 9+15= 24x3= 72

b- 9+5= 14x3= 42

c- 3+15= 18x9=162

d- 3+5= 8x9= 72

Hope this helps.

56.6

step-by-step explanation:

the ratio of the perimeters is equal to the scale.

the ratio of the areas is equal to the square of the scale.

34 / 20 = k

a / 19.6 = k²

substituting:

a / 19.6 = (34 / 20)²

a = 19.6 (34 / 20)²

a ≈ 56.6