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3 years ago

Can someone help me how do you eliminate “x”

Mathematics

1 answer:

Contact [7]3 years ago

5 0

Answer:

Multiply the bottom one by -4

Step-by-step explanation:

to cancel in a system of equations, there must be a negative and a positive of both variables. - times - equals +, so multiply -x by -4 to get 4x, thus cancelling -4x with 4x.

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A giant scoop, operated by a crane, is in the shape of a hemisphere of radius 21 inches. The scoop is used to transfer molten st

eduard

Answer:

31.5 in

Step-by-step explanation:

Volume of a hemisphere = (2/3) $\pi$ r³
(where r is the radius)
Volume of a cylinder = $\pi$ r²h
(where r is the radius and h is the height)
radius r = (1/2) diameter

First, find the volume of the scoop using the volume of a hemisphere formula with r = 21:

Volume = (2/3) $\pi$ x 21³ = 6174 $\pi$ in³

Now equate the found volume of the scoop to the equation of the volume of a cylinder with r = 14, and solve for h:

$\pi$ 14²h = 6174 $\pi$

196 $\pi$ h = 6174 $\pi$

Divide both sides by $\pi$ : 196h = 6174

Divide both sides by 196: h = 31.5

Therefore, the height of the molten steel in the storage tank is 31.5 in

3 0

2 years ago

Whats the área of a square whose perimeter is 48

Roman55 [17]

Answer:

144

<h3>Step-by-step explanation:</h3>

If 48 is the perimeter, then 48 divided by 4 is one of the side lengths.

L x W = Area

12 x 12 = Area

12 x 12 = 144

Area = 144

7 0

3 years ago

Can someone tell me… Given the right triangle ABC, what is the value of tan(A)?

sergey [27]

Answer:

Step-by-step explanation:

tanA = $\frac{opposite}{adjacent}$ = $\frac{BC}{AC}$ = $\frac{24}{10}$ = $\frac{12}{5}$ → C

6 0

3 years ago

Two interior angles of a triangle each measure 34°. What is the measure of the third interior angle?

lana [24]

Answer:

D. 112

Step-by-step explanation:

Since we know that a triangle totals 180 degrees, we can easily figure out the third angle. Since each measure 34 degrees, simply multiply by 2. You get 68 degrees. Then you do 180-68 to get 112.

4 0

3 years ago

WILL GIVE BRAINLIEST!! PLEASE HELP ASAP !!! 20 POINTSSSSS

grin007 [14]

Answer:

She can buy 5 rolls of crepe paper with 2ft of paper left.

Step-by-step explanation:

If you multiply 12ft by 4 sides you will get 48ft so then 5 rolls of paper that is 10ft equals 50ft so you will have more than enough paper

5 0

3 years ago