Question

I need help with this math question

Answer 1

3

Explanation:

you can set up a ratio using corresponding parts from each triangle.

or

notice the change from 3 to 9 is by multiplying 3 x 3

the change is the same for all : 3 x 4 = 12 , 3 x 5 = 15

ratio way

`(new)/(old\\)` =
`(9)/(3)` = 3

Answer 2

the scale factor is 3. hope this helps