18 = 5p + 3 NEED HELP ASAP

What is the area of triangle abc if a = 8, b = 11, and c = 15?

Write two subtraction equations that are equivalent to 5 + 12 = 17.

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?