ABCD is a square. Find the length of AC

Question 5 spring semester final exam math evaluate

What is the first step of an indirect proof of a number that is divisible by two

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?