Solve by using common denominators 2/1 divide 1/4

The u-drive rent-a-truck company plans to spend $13 million on 320 new vehicles. each commercial van will cost $25 comma 000, each small truck $50 comma 000, and each large truck  $80 comma 000. past experience shows that they need twice as many vans as small trucks. how many of each type of vehicle can they buy?

Aline passes through 3,7 and 6,9 what equation represents the line

Given the two similar triangles, how do i find the missing length? if a=4, b=5, and b'=7.5 find a'