Bob gave half his football collection to Joh. He then bought 10 more footballs. If Bob now has 20 footballs, how many did he start with? a. 12 b. 10 c. 20 d. 5

Write an equation of a line in slope intercept form that is perpendicular to the line 2x -3y = 12 and passes through the point (2, 6).

What are the sotions to the quadratic equation 9x^2=4

The chs baseball team was on the field and the batter popped the ball up. the equation b(t)=80t-16•16+3.5 represents the height of the ball above the ground in feet as a function of time in seconds. how long will the catcher have to get in position to catch the ball before it hits the ground? round to the nearest second