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# math pls help y i no understand facorting quadratics help pls

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The equation y = -16^2 + 26t + 105 describes the height (in feet) of a ball tossed up in the air at 26 feet per second from a height of 105 above the ground. In how many seconds will the ball hit the ground? express your answer as a decimal rounded to the nearest tenth.

Dec 11, 2020

#1
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When the ball hits the ground, the height, y, will be 0

0 = -16t2 +26t + 105        a = -16     b = 26     c = 105   in quadratic formula

$$t = {-b \pm \sqrt{b^2-4ac} \over 2a}$$        throw out any negative value for 't' that you find......

Dec 11, 2020
#2
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but in how many seconds will ball hit ground tho

Guest Dec 11, 2020
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THAT is what was explained.....   sub in the values of   a  b   c   into the quadrtaic formula to calculate 't' when the ball hits the ground....

you are familiar with the Quadratic Formula ...yah?

Guest Dec 11, 2020