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alekssr [168]
3 years ago
13

Solve -4(3x – 7) = 52 for x. a. x = 2 b. x = -2 c. x = -4 d. x = 4

Mathematics
1 answer:
Darya [45]3 years ago
5 0

Answer: x = -2

Step-by-step explanation:---------------

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A cement walkway of uniform width has been built around an in-ground rectangular pool. the area of the walkway is 1344 square fe
Elza [17]

Answer:

6 feet.

Step-by-step explanation:

Dimensions of the Pool =80 feet long by 20 feet wide

Area of the walkway =1344 square feet.

If the width of the walkway=w

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  • Width of the Larger Rectangle =20+2w

Area of the Walkway =Area of the Larger Rectangle - Area of the Pool

1344=(80+2w)(20+2w)-(80*20)\\1344=80*20+160w+40w+4w^2-80*20\\4w^2+200w=1344\\4w^2+200w-1344=0\\We factorize\\4(w^2+50w-336)=0\\4(w^2-6w+56w-336)=0\\w(w-6)+56(w-6)=0\\(w-6)(w+56)=0\\w-6=0$ or $ w+56=0\\w=6$ ft or $ w=-56$ \\Therefore, the width of the walkway , w=6 feet.

6 0
3 years ago
Convert 0.0045 from standard form to scientific notation.
djyliett [7]
I did not catch well, but i think you already got your answers. Let me explain. For the first part you got your notation right: for 0.0045 the correct scientific notation is 4.5 x 10^-3. Now the second part, the answer would be the first one, the notation that you are giving is the one who corresponds to <span>4.5 x 10^-2, the first option you have. Hope it helps</span>
3 0
4 years ago
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What is the volume of a sphere if it has a radius of 2 feet? (Use 3.14 for π .) 33.49 ft 3 100.48 ft 3 75.36 ft 3 25.12 ft 3
cricket20 [7]
I think the answer is the first one
5 0
3 years ago
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Simplify (4b+7)8b^2<br> Can someone help me please?
Fed [463]

Answer:

32b^{3} +56b^{2}

Step-by-step explanation:

7 0
3 years ago
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How is 33 the answer to 6% of 550
NikAS [45]
Is  %
  =
of 100

x 6
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550 100
cross multiply and divide 

100x=3300
divide both sides by 100
x=33

6 0
3 years ago
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