Question

1/2= a/9
The directions are- Find the value of the letter in each proportion

Answer 1

1/2= a/9
a = 9*(1/2)
a = 9/2
a = 4.5

Answer 2

you have to isolate a by deviding bothe sides by 1/9. so 1/9/1/9a=1/2/1/9 deviding bothe sids yeilds a=9/2

Answer 3

1/2=a/9
a=1/2*9
=9/2=4.5