complete the statement to show an equivalent ratio

Question

7:5 is equivalent to 21:?

Answer 1

15

Answer 2

which ratio is equivalent to 1:5

3:10
4:20
7:13
20:4

Answer 3

4:20

Answer 4

which ratios are equivalent to 4:10? choose all the equivalent ratios

2:5
8:30
12:30
20:8

Answer 5

2:5
8:20