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3 years ago

6

Divide. −2 4/7 Enter your answer as a mixed number, in simplified form, in the box.

1 answer:

Katarina [22]3 years ago

3 0

Answer:
-3 $\frac{3}{7}$

Explanation:
$\frac{-24}{7}$ = -3 $\frac{3}{7}$
So first make the improper fraction into a mixed number by taking out all the whole numbers from the numerator (3) and making sure the proper sign is in front of the answer (- 3) your remainder is the original numerator minus the product of the answer times the denominator: 24 - (3 • 7) = 24 - 21 = 3. Rewrite the mixed number.

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Answer:

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3 years ago

The equation h(t) = -16t² + 80t + 64 represented the height, in feet, of a potato t seconds after it has been launched.

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we have

$h(t)=-16t^2+80t+64$

where

h(t) is the height of a potato in feet

t is the time in seconds

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we know that

When the potato hit the ground, the value of h(t) must be equal to zero

so

For h(t)=0

$-16t^2+80t+64=0$

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The formula to solve a quadratic equation of the form

$ax^{2} +bx+c=0$

is equal to

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in this problem we have

$-16t^2+80t+64=0$

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substitute in the formula

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$-16t^2+80t+64=40$

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substitute in the formula

$t=\frac{-80\pm\sqrt{80^{2}-4(-16)(24)}} {2(-16)}$

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