1) Write the ration in simplest form 50:10

Question

A)25:2
B)10:2
C)5:1
D)1:5

2) Solve the following proportion.
r/5=9/21

Answer 1

1)

50:10 = 5 ∙ 10 / 10 = 5 = 5:1

2)

r / 5 = 9 / 21

r / 5 = 3 ∙ 3 / 3 ∙ 7

r / 5 = 3 / 7

cross multiply

7 ∙ r = 5 ∙ 3

7 r = 15

r = 15 / 7

Answer 2

this helps no one

Answer 3

Does anybody have the answers