The answer is 10x-14 because you have to multiply in the parentheses
The shapes are similar.
When two figures are similar, the ratios of the lengths of their corresponding sides are equal.
Therefore,
![\frac{42}{(15 + 42)} = \frac{x}{10 + x}](https://tex.z-dn.net/?f=%20%5Cfrac%7B42%7D%7B%2815%20%2B%2042%29%7D%20%3D%20%5Cfrac%7Bx%7D%7B10%20%2B%20x%7D%20)
Simplify:
![\frac{42}{57} = \frac{x}{10 + x}](https://tex.z-dn.net/?f=%20%5Cfrac%7B42%7D%7B57%7D%20%3D%20%5Cfrac%7Bx%7D%7B10%20%2B%20x%7D%20)
Cross multiply:
42(10+x) = 57x
420 + 42x = 57x
420 = 57x - 42x
420 = 15x
x = (420÷15)
x = 28
Answer:
A 31.5
Step-by-step explanation:
15x2=30 and A is the only one close to 30
Answer:
887.74
Step-by-step explanation: