Which of the following is a monomial?
a. 2x + yz
b. 2xyz2
c. 2x − yz
d. 2 + xyz

Which expression is equivalent to 2x^2+7x+4?

What is the slope of the line that passes through the points (–9, 2) and (0, 4)? the slope of the line is

Arestaurant offers delivery for their pizzas. the total cost the customer pays is the price of the pizzas, plus a delivery fee. one customer pays $23 to have 2 pizzas delivered. another customer pays $59 for 6 pizzas. how many pizzas are delivered to a customer who pays $86?