There are 21 dogs and 15 cats at the local animal shelter. Write the ratio of dogs to cats in simplest form. Group of answer choices

3:1

5:7

21:15

7:5

7:5

Step-by-step explanation:

1. You put the ratio together (Dog:Cats):

21:15

2. 21:15 are factors of three, so you simplify by three and you get 7:5.

b

step-by-step explanation:

5x+40

5(x + 8)

7x - 49

7(x - 7)

18x + 9

9(2x + 1)

15x - 10

5(3x - 2)

step-by-step explanation:

for number one all you have to do is factor 5 out of 5x + 40

for number 2 factor 7 out of 7x - 49

for number three factor 9 out of 18x + 9

for number four factor 5 out of 15x - 10