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3 years ago

13

If the radius of a cone is doubled, how would the volume change?

1 answer:

vaieri [72.5K]3 years ago

6 0

If the radius is doubled, volume would increase by 4 times.

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Factor this expression completely<br><br>-21x + 28

pickupchik [31]

-21x+28 is factored into:

-7(3x-4)

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3 years ago

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The classes At the middle school want to rise money the 6 grade runs a bake sale 5 hours and makes 170 the 7 grade sets up a dru

kaheart [24]

Sixth grade
Because if you divide their total profit by the total amount of hours they worked, you would find that the sixth grade's income per hour is the highest.
Sixth grade: 170÷5=34
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Eighth grade: 192÷6=32

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3 years ago

Which equation is equivalent to √x^2+81 = x+10

jeka57 [31]

Keywords:

<em>equation, operations, equivalent, binomial, square root </em>

For this case we have an equation in which we must apply operations to rewrite it in an equivalent way. We must start by raising both sides of the equation to the square. Thus, we eliminate the square root of the left side of equality and finally solve the binomial of the right side of equality.

So we have:

$\sqrt {x ^ 2 + 81} = x + 10\\(\sqrt {x ^ 2 + 81}) ^ 2 = (x + 10) ^ 2\\x ^ 2 + 81 = (x + 10) ^ 2$

By definition: $(a + b) ^ 2 = a ^ 2 + 2ab + b ^ 2$

$x ^ 2 + 81 = x ^ 2 + 2 (x) (10) + (10) ^ 2\\x ^ 2 + 81 = x ^ 2 + 20x +100$

Thus, $x ^ 2 + 81 = x ^ 2 + 20x +100$ is equivalent to $\sqrt {x ^ 2 + 81} = x + 10$

Answer:

$x ^ 2 + 81 = x ^ 2 + 20x +100$

Option D

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3 years ago

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How to factor 6x^2 + 8x + 7x + 21?

Nitella [24]

(23+15x) when you add this you will have your answer

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David used the measuring cup show to measure milk for a batch of muffins. He needs to make 12 batches of muffins for a fund rais

lozanna [386]

16x12=192
Yes, if he only uses one cup per batch

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3 years ago

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