9.) Suppose you bought supplies for a party. Three rolls of streamers and 15 party hats cost $34.50. Later, you bought 1 more roll of streamers and 4 party hats for $9.50. How much did each roll of streamers cost? How
much did each party hat cost?

Find the value of x for which abcd must be a parallelogram -9-6x x-30

One of the same side angles of two parallel lines is 20° smaller than the other one. find the measures of these two angles.

Val and tony get paid per project. val is paid a project fee of $44 plus $12 per hour. tony is paid a project fee of $35 plus $15 per hour. write an expression to represent how much a company will pay to hire both to work the same number of hours on a project.