Alex bought 4 protein bars and 2 apples for $11. Mel bought 2 protein bars and 4 apples for $7. Find the cost of a single protein bar and a single apple.

Find parametric equations for the line. (enter your answers as a comma-separated list of equations. let x, y, and z be functions of t.) the line in the direction of the vector 5 i + 5 j − 6k and through the point (−4, 4, −2).

Adj has a total of 1075 dance and rock songs on her system. the dance selection is 4 times the size of the rock selection. write a system of equations to represent the situation.

If a || b and b | y, then ? a) x || y. b) x | a. c) a | y. d) a || y.