The height of a ball is modeled by f(x)=-16x^2+128x where x is the number of seconds after the ball is hit. How long does it take the ball to hit the ground?

Write numerical coefficient of y² in the expression 2x² - 15xy – 7y²

What is the effect on the graph of the function f(x)=x when f(x) is replaced with -f(x)+4

If mary had 320 toy cars and she gave her friend 50 cars and then she gave her brother 72 more cars how much toy cars would mary have left ● explain with proper details