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3 years ago

Plzzzzzz help meeeee

Mathematics

1 answer:

kipiarov [429]3 years ago

5 0

Answer:

Step-by-step explanation:

For A, 7x=21, it is asking, 7 multiplied by what number is 21? We can try to figure it out. Let's start with 0.

7(0)≠21

Then 1.

7(1)≠21

7(2)≠21

7(3)=21

Therefore, for question a, the answer is 3.

For question b, it's asking 6 minus what is 2.

With this one, we can say it is 4, since 6-4=2.

Now moving on to B.

a) 2x+4=16

We need to isolate x in order to find it's value.

So we can begin with subtracting 4 from both sides, getting us:

2x=12

Then, if we divide both terms by 2, we get x.

x=12/2

x=6.

3 x (z/4)=9

Again, we need to isolate z.

So, we multiply both sides by 4, getting us

3z=36

then we divide by 3

z=36/3

z=12

c) 16-x=2

Here we simply subtract 16 from each side, then flip the signs to get positive x.

So, 16-x=2

-x=-14

x=14

d) 4k=20

This is essentially asking, 4 times what number is 20?

So we can divide both sides by 4 and get

k=20/4

k=5

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we know that

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$V= \frac{1}{3} \pi r^{2}h$

in this problem

the radius is equal to

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1) Find the height of the cone before the storm

Applying the Pythagorean Theorem find the height

$h^{2} = l^{2}-r^{2}$

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$h^{2} = 65^{2}-56^{2}$

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2) Find the volume before the storm

$V= \frac{1}{3}*\pi* 56^{2}*33$

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3) Find the volume after the storm

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4) Find how this change affect the volume of the pile

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$\frac{1,277.63 \pi }{34,496 \pi } = \frac{1}{27}$

therefore

the answer part a) is

The volume of the pile after the storm is $\frac{1}{27}$ times the original volume

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$8,348,687.2/350=23,853.39 \ lane\ miles$

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the answer part b) is

the number of lane miles that were covered with salt is $23,853.39 \ lane\ miles$

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$1,277.63\pi\ ft^{3}=4,013.79\ ft^{3}$

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$4,013.79*80=321,103.20\ pounds$

9) Find the number of lane miles

$321,103.20/350=917.44 \ lane\ miles$

therefore

the answer part c) is

the number of lane miles is $917 \ lane\ miles$

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3 years ago

Plzzzzzz help meeeee​

Plzzzzzz help meeeee