Find the solution to the system of equations. You can use the interactive graph below to find the solution.
\begin{cases} -8x+4y=24 -7x+7y=28 \end{cases}
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−8x+4y=24
−7x+7y=28
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x=x=x, equals
y=y=y, equals

Aball is thrown from a height of 139 feet with an initial downward velocity of 15 ft/s. the ball's height h (in feet) after t seconds is given by the following. h=139-15t-16t^2 how long after the ball is thrown does it hit the ground? round your answer(s) to the nearest hundredth. (if there is more than one answer, use the "or" button.) t =