There are 4 variables in the expression. The variables are: a,b,c and d.
8d^2 = variable d
2bc = variables b and c
10ab = variables a and b
Answer:
x = 20
Step-by-step explanation:
2x+7+13 = 3x
2x - 2x +7 +13 = 3x - 2x
20 = x
Surface area is square units, so you would need to square the scale factor.
The length was tripled, which means it is a scale factor of 3
3^2 = 9
The surface area would increase by a factor of 9.
The answer is B.
