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MissTica
3 years ago
5

The rectangle below has an area of x^2-x-72 and a length of x+8 meters.

Mathematics
2 answers:
neonofarm [45]3 years ago
7 0
Area of rectangle = length x width

so width = area / length = (<span>x^2-x-72) / (x+8); after factorizing

width = (x-9)(x+8)/(x+8)

= x - 9

</span>
bulgar [2K]3 years ago
4 0
X^2-x-72 

what timed together makes -72 and added together make -1 
1 & 72 (no)
2 & 36 (no)
3 & 24 (no)
4 & 18 (no)
6 & 12 (no)
8 & 9 < its this one . +8 x -9 = -72 but also +8-9=-1 
as we already have the length which is (x+8) the width would be (x-9)

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Marat540 [252]
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3 years ago
Manny worked all summer to save money. Now he has $150 with which he wants to buy a digital music player and as many songs as he
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Answer:

Step-by-step explanation:

Total amount of Money saved by Manny is $150. He wants to buy a digital player with it.

The digital music player costs $89, and each song costs $0.99. Let x represent the number of songs that he can afford. This means that the cost of x songs would be

89 + 0.99x

If Manny spends no more than $150, before tax, the number of songs that he can buy will be

89 + 0.99x = 150

0.99x = 150 - 89 = 61

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8 0
3 years ago
Simplify 5 (3 1/5​ +2 4/5​−0.6)
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Step-by-step explanation:

l dont understand your question

is it 3 and a fifth or 31/5

7 0
3 years ago
M is directly proportional to r2.when r=2,m=14.Work out the value of r when m =224
balandron [24]
<h3>♫ - - - - - - - - - - - - - - - ~Hello There!~ - - - - - - - - - - - - - - - ♫</h3>

➷ M = k x r^2

Substitute in the values:

14 = k x 2^2

Divide both sides by 2^2 to find k:

k = 3.5

Substitute the new values in:

224 = 3.5 x r^2

Divide both sides by 3.5 to find r^2

r^2 = 64

Square root it:

r = 8

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6 0
3 years ago
100pts!! Ellis is painting wooden fenceposts before putting them in his yard. They are each 7 feet tall and have a diameter of 1
NeX [460]

Answer:

39.25 cubic feet of paint will be needed by Ellis.

Step-by-step explanation:

Step-by-step explanation:

Volume of a cylinder:

The volume of a cylinder of radius r and height h is given by:

V = \pi r^2h = 3.14r^2h

How much paint will Ellis need to paint all the surfaces of the 10 fenceposts?

This is the combined volume of these 10 fenceposts.

They are each 5 feet tall and have a diameter of 1 foot.

Radius is half the diameter, so r = \frac{1}{2} = 0.5. Also h = 5

10 fenceposts:

Each has the same volume, so:

V = 10(3.14)r^2h = 31.4(0.5)^2(5) = 39.25

39.25 cubic feet of paint will be needed by Ellis.

hope this helps

6 0
2 years ago
Read 2 more answers
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