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Triss [41]
3 years ago
6

Find x if the perimeter of a rectangle is 140. The rectangle has a length of 5x and a width of 4x-2.

Mathematics
1 answer:
RSB [31]3 years ago
4 0

Answer:

x=8

Step-by-step explanation:

p=(l+b)

140=2(x+4x-2)

140=2(9x-2)

140=18x-4

140+4=18x

144=18x

144/18=x

8=x

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erik [133]

Answer:

Greatest number of newspaper ads = 59

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Step-by-step explanation:

It is given that we should buy at least 5 newspapers for every 3 television ads.

So, after purchasing 3 television ads, we can buy any number of television ads but the number should be greater than 5.

Since, the maximum is 62, we can buy 59 newspaper ads. (Note that we have already bought 3 television ads).

For every 3 television ads, we should buy 5 newspaper ads. So,

For the purchase of 3 television ads, we should buy the minimum of 5 newspaper ads.

For the purchase of 2(3) television ads, we should buy the minimum of 2(5) newspaper ads.

For the purchase of 3(3) television ads, we should buy the minimum of 3(5) newspaper ads.

...

...

For the purchase of 7(3) = 21 television ads, we should buy the minimum of 7(5) = 35 newspaper ads.

So, totally 21+35 = 56 ads.

For the remaining 6 ads, if we buy 3 television ads, we should buy 5 newspaper ads.

So, we can buy 2 television ads and 4 newspaper ads.

Hence, we can buy the maximum of 21+2 = 23 television ads.

7 0
3 years ago
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if a turtle can move 1/7 of a mile every hour, then how many hours would it take for a turtle to go 5 miles?
Lyrx [107]

Answer:

35 hours

Step-by-step explanation:

1 mile would be 7 hours- 7x5=35

6 0
2 years ago
Did you ever free club is selling wrapping paper for a fundraiser they order 16 cases if each student in the club takes two thir
omeli [17]
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times both sides by 3
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3 0
3 years ago
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Use exact numbers <br><br> Find the equation of the line <br><br> Thank very much in advance!
SashulF [63]

Answer:

y = 3x+3

Step-by-step explanation:

Slope = 3 and y-intercept = 3

5 0
3 years ago
The formula s = StartRoot StartFraction S A Over 6 EndFraction EndRoot gives the length of the side, s, of a cube with a surface
jeyben [28]

Answer:

2.83 inches

Step-by-step explanation:

The formula for surface area of cube = 6s²

Where

s = side length of cube

S.A = 6s²

s² = S.A/6

s = √S.A /6

For cube a

Surface area = 1200 in²

Hence,

side length = √1200/6

Side length = √200

= 14.14 inches

For cube b

Surface area = 768 in²

Hence,

side length = √768/6

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Therefore,

14.14 inches - 11.13 inches

= 2.83 inches

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3 years ago
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