x:4 and 45:20
a.8
b.9
c.10
I assume these two ratios are supposed to be the same.
x:4 = 45:20
x/4 =45/20
times 4
x = 4(45/20) = 9
like i know the answer how i explain
x:4 = 45:20
Cross multiply the two middle numbers. Cross multiply the first and last numbers.
20x = 180
Solve for x.
x = 180/20
x = 9