Which ratios are not equivalent to the ratio 4:5? a. 6:10
b. 12:15
c. 16:20
d. 32:40
e. 15:60

Steve wants to develop a way to find the total cost of any item including sales tax. the sales tax in his city is 6%. his friend jenna writes the expression x + 6x where x is the cost of the item. explain whether her expression is correct based on the situation.

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.

Which is f(5) for the function –2x2 + 2x - 3?