Letts go

The parabola y = x² - 4 opens: a.) up b.) down c.) right d.) left

Let f(x) = 3 − x . find the average rate of change of f(x) from x = a to x = a + h and simplify your answer so that no single factor of h is left in the denominator.

Your food costs are $5,500. your total food sales are $11,000. what percent of your food sales do the food costs represent?