Which of the following equations could be solved to determine the length of RS?

Erin bought christmas cards for $2 each to send to her family and friends. which variable is the dependent variable?

Find the solution(s) to the system of equations. select all that apply y=x^2-1 y=2x-2

If 30 lb of rice and 30 lb of potatoes cost ? $27.60? , and 20 lb of rice and 12 lb of potatoes cost ? $15.04? , how much will 10 lb of rice and 50 lb of potatoes? cost?