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Softa [21]
3 years ago
12

I need help I will mark brainlyest

Mathematics
1 answer:
Allisa [31]3 years ago
3 0
The first and the last are correct.
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**A rock dropped from a 100 foot tower.
mars1129 [50]

Answer:

2.83 s

Step-by-step explanation:

We are given that

h(t)=-16t^2+10t+100

When a rock reached the ground then h(t)=0

-16t^2+10t+100=0

16t^2-10t-100=0

Using quadratic formula

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

t=\frac{10\pm\sqrt{(-10)^2-4\times 16\times (-100)}}{2(16)}

t=\frac{10\pm\sqrt{100+6400}}{32}

t=\frac{10+\sqrt{6500}}{32}=2.83

t=\frac{10-\sqrt{6500}}{32}=-2.2

Time cannot be negative .Therefore, negative value of t can not be possible.

Hence, the rock takes 2.83 sec to reach the ground.

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3 years ago
One interior angle of a triangle has a measure that is equal to the sum of the measures of the other two angles of the triangle.
sashaice [31]
It may be a special right triangle which would make the angles 45, 45, and 90
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2 years ago
Hannah spends $4.50 each day to buy lunch at her school. After school each day, she buys the same snack. Hannah spends $28.75 fo
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X represents the price of the snack Hanna buys after each school day.
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Shape 1 and 2 are plotted on a coordinated plane. Which statement about the shape is true?
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Answer:

There's nothing to answer to that question, can you be specific.

Step-by-step explanation:

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What is the standard form equation for y=2x-4?
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Isn't it already in standard form?
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