Question

Help please!!! A) 3.5 B) 2.8 C)1.4 D)5

Answer 1

We have two similar triangles. One triangle has the lengths of 5 and 7, while the other has 2 and x. We can set these up as proportions.

Set the proportions by creating fractions with the corresponding side lengths.
It should look like this:
5/2 : 7/x
A quick way to solve for this is to find the scale factor- by dividing the numerator by it's denominator.

Divide 5 by 2.
5 / 2 = 2.5

2.5 is our scale factor, so we should divide 7 by 2.5 to solve for x.

Divide 7 by 2.5.
7 / 2.5 = 2.8

X = 2.8

Your answer is B.) 2.8

I hope this helps!