6; because they are an equal distance apart
C = 10m + 30, where C is total cost and m is # of months
C = 10(5) + 30
C = 50 + 30
C = $80
$160 = 10m + 30
160 - 30 = 10m
130/10 = m
m = 13 months
Hope that helps
There are 87 men
3 is the male ratio
You add all the ratios
3+4+5=12
3/12×348
=87
