Choose all the equations that are exponential:
y = 6x -5
y = 8^x-9
f(x) = 3x^2+4
y = 7x^3
y = 1/3^x

Arestaurant chef made 1 1/2 jars of pasta sauce. each serving of pasta requires 1/2 of a jar of sauce. how many servings of pasta will the chef be able to prepare using the sauce?

Suppose 38 lbs of coffee beans are required to produce 2 lbs of farmer's coffee. how many lbs of coffee beans are required to produce 309 lbs of farmer's coffee?

Write an expression that is equivalent to ( 3+14)+27.