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kow [346]
3 years ago
8

Need help with math quarterly please

Mathematics
2 answers:
Readme [11.4K]3 years ago
7 0

Answer:

c=40

Step-by-step explanation:

a + c=65 equation 1

7a+4c=335 equation 2

c=65-a isolate c from equation 1

7a+4(65-a)=335

7a+260-4a=335

3a=75

a=25

solve for c

a+c=65

25+c=65

c=40

check answer:

7a+4c=335

7(25)+4(40)=335

175+160=335

335=335

lesya [120]3 years ago
4 0
Put a more clearer picture can’t see men
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Answer:

\pi(r^{2}h)

Step-by-step explanation:

r = radius

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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)\pir³
    (where r is the radius)
  • Volume of a cylinder = \pir²h
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  • 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:

                                            \pi14²h = 6174\pi

                                            196\pih = 6174\pi

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Divide both sides by 196:          h = 31.5

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

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2 years ago
Helpp pls (39points)<br> Can you answer this Q???
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The length of a rectangular poster is 9 more inches than two times its width. The area of the poster is 161 square inches. Solve
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Answer:

<u>Width = 7 inches</u>

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Step-by-step explanation:

Let :

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  • width = x

Equating to area :

  • (2x + 9)(x) = 161
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2 years ago
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