Question

AC II ED. Solve for x, round to the nearest tenth

Answer 1

Set up a proportion.
\[\frac{10}{x + 5} = \frac 38\]

Answer 2

Where did those numbers come from?

Answer 3

The 10 is there. Then, the triangles are similar. That means the ratio would be 10: x - 5 + 10. The same for the other one.15:40. I just simplified it.

Answer 4

so i substitute in these possible answers:

x=6
x=37.5
x=21.7
x=42.5

Answer 5

Just solve the proportion by cross multiplying.
10(8) = 3(x + 5)

Answer 6

Can you solve from there?

Answer 7

Yes, i got the answer. Thanks!