Question

Also help me with this please.

Answer 1

3

15/5=3
12/4= 3

So the scale factor is 3! :)

Answer 2

3

Explanation:

To find the scale factor, take the first side and determine what you need to multiple it by to get the second side

5*what = 15

Divide each side by 5

what = 15/5

what = 3

Check

4*3 = 12

This is true so the scale factor is 3