sokal and roy have a sack of 50 apples. All apples are either red or green. If sokal has 3 times as many red apples as roy does and half as many green apples. How many red apples sokal have?

Determine whether the quadrilateral below is a parallelogram. justify/explain your answer (this means back it up! give specific information that supports your decision. writing just "yes" or "no" will result in no credit.)

What are the solutions of the system? solve by graphing. y = -x^2 -6x - 7 y = 2

20 solve 2(4 x + 3) < 5 x + 21. a) { x | x < 9} b) { x | x > -5} c) { x | x > -9} d) { x | x < 5}