6. If P(6, -2). Q(-2, 8). R(-4, 3), and S(-9, y). find the value of y' so that PQ is perpendicular to RS.

Scarlet bought three pairs of sunglasses and two shirts for $81 and paula bought one pair of sunglasses and five shirts for $105 what is the cost of one pair of sunglasses and one shirt?

You are a clerk at convenience store. a customer owes 11.69 for a bag of potatoes chips. she gives you a five dollar bill. how much change should the customer receive?

True or false: the graph of y=f(bx) is a horizontal compression of the graph y=f(x) if b< 1