3 years ago

Two fractions that have the sum of 4/5

Mathematics

1 answer:

beks73 [17]3 years ago

3 0

1/5 and 3/5

Hope this helps!

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-Gives you thumbs up- </span>

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3.8 seconds

Step-by-step explanation:

Given equation

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When the ball hits the ground then height is 0

So we replace h with 0 and solve for t

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a= -16 , b= 60 and c= 5

Apply quadratic formula to solve for t

$t=\frac{-b\pm \sqrt{b^2-4ac}}{2a}$

= $\frac{-60+\sqrt{60^2-4\left(-16\right)\cdot \:5}}{2\left(-16\right)}[/tex[tex]=\frac{-60+-\sqrt{3920}}{-32}$

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So answer is 3.8 seconds

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