Percent Profit or Loss Calculate the percentage profit if an antique clock is bought at a yard sale for $20 and sold for $100. Type the number only

Simplify the expression. -2/5(10+15m-20n)

Solving systems of linear equations: tables represent two linear functions in a systemöwhat is the solution to this system? 0 (10)0 (1.6)0 18,26)0 18-22)

After t seconds, a ball tossed in the air from the ground level reaches a height of h feet given by the equation h = 144t-16t^2. after how many seconds will the ball hit the ground before rebounding?