4 Use the system of equations shown. 3x + 4y = -9
9x + 2y = 3
a. Would you choose substitution or elimination to solve this system? Explain.
b. Solve the system using the method you chose in problem 4a. Show your work.

Which points are solutions to the linear inequality y < 0.5x + 2? check all that apply. (–3, –2) (–2, 1) (–1, –2) (–1, 2) (1, –2) (1, 2)

Organic apples are on special for $1.50 per pound. does total cost vary inversely or directly with the number of pounds purchased? find the cost of 3.4 pounds of apples. a. inversely: $5.10 b. directly; $5.10 c. inversely: $2.27 d. directly; $2.27

The two square pyramids are similar. find the total volume of both pyramids if the ratio of their surface areas is 9/16