Which function has a vertex at (2, -9)?

f(x) = -(x - 3)2
f(x) = (x + 8)
f(x) = (x - 5)(x + 1)
f(x) = -(x - 1)(x - 5)

If f(x) =3x-2 and g(x) =2x+1 fins (f+ g) (x)

Find the constant of variation for the relation and use it to write an equation for the statement. then solve the equation.

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?