3 years ago

Don’t understand again?

Mathematics

1 answer:

Makovka662 [10]3 years ago

8 0

10 2/7 ÷ 3/14 First Write The Equation

72/7 ÷ 3/14 Use KCF which is Keep, Change, and Flip

1008/21 Use Division Of Equality

Answer: 48

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Answer:

7 seconds

Step-by-step explanation:

Distance of the coin above the water is modeled by the equation

$y=-16x^2+96x+112$

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Now equating with zero.

$0=-16x^2+96x+112\\\Rightarrow 16x^2-96x-112=0\\\Rightarrow x=\dfrac{-\left(-96\right)\pm \sqrt{\left(-96\right)^2-4\times \:16\left(-112\right)}}{2\times \:16}\\\Rightarrow x=7, -1$

So, time taken by the coin to hit the water is 7 seconds.

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2 1/2

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There were 8 students o a field trip. While, outside, 75% of the students wore jackets. How many students wore jackets

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