Find the sum. 64 + (-15)

Janets dinner costs 7.50. if she wants to leave a 10% tip how mich extra should she leave

Use the elimination method to find the solution to the system of equations. 2x - 3y = -9 -x + 3y = 6

Pyotr tchaikovsky sporting goods operates on a 45% overhead based on the selling price, which results in an overhead of $65.34 on the newest version of an air hockey game set. if the air hockey game set costs pyotr tchaikovsky sports $49.32, find the selling price, the markup, and the net profit.