Sally left paris traveling 84mph. joan, to catch up, left some time later driving at 93mph. joan caught up after 9 hours. how long was sally driving for before joan caught up?

Given the function f(x) = 3x + 1, evaluate f(a + 1). a. 3a + 1 b. a + 2 c. 3a + 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?

In which form is the following function written? y = - 2(x – 3)(x + 5)