Match 1234 to abcd 1. 5x + 5y - 5 2. 2x + 9y - 7x + 5 - 4y - 10 3. 5x + 10y - 10x + 5y - 15 + 20 4. -5 + 10x - 7y + 10 - 3y + 5x a. -5x + 5y - 5 b. = -5x + 15y + 5 c. = 15x - 10y + 5 d. 5x + 5y - 5

[10 points, algebra 2]according to my answer key the restrictions are -1 and 4. but why not positive 1?

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?

15m is what percent of 60m; 3m; 30m; 1.5 km? the last one is km not m