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3 years ago

15

7x+2y=24 and 8x+2y=30

1 answer:

raketka [301]3 years ago

8 0

I guess you want to find the values of x & y. If so:

7x+2y=24
8x+2y=30
1) multiply the 1st equation by (-1)==> -7x-2y=-24
2) Now add -7x-2y=-24 to 8x+2y=30 ==> x + 0y = 6 ==> x = 6
3) replace x by 6 in any of te two equation & you will find y= - 9

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What is the volume of a sphere with a radius of 6in? Round to the nearest hundredth. Remember V = 4/3πr3 * 20 points 457.86 inch

kakasveta [241]

Given:

The radius of the sphere is 6 in.

To find:

The volume of the sphere.

Solution:

We know that, the volume of a sphere is

$V=\dfrac{4}{3}\pi r^3$

Where, r is the radius of the sphere.

Putting r=6, we get

$V=\dfrac{4}{3}\pi (6)^3$

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