The equation -16x^2+10x+15=y represents the height y, in feet, of a flotation device above the water after x seconds. The linear term represents the initial velocity. The constant term represents the initial height. a. If the initial velocity is 0, when should the flotation device land in the water? b. If the initial height is 0, when should the flotation device be in the water?

What’s the improper fraction?

So the first thing we do is to multiply the top equation by 3. the reason i want to do this is i notice there will be a 6y on both equations and can possibly add/subtract them. so we get 6y = -3x + 27. adding that and the second equation we get 6x = 27-15 which is 12. divide by 6 and we get 2. ∴ x = 2. substituting 2 into the first equation we get 2y = -2 + 9 which is 7. divide by 2 and we get 7/2. ∴ y = 7/2, x = 2.

Ava is 112 cm  olivia is 89 cm