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11Alexandr11 [23.1K]
4 years ago
14

How do I do this?? Plz help!!

Mathematics
1 answer:
Fed [463]4 years ago
7 0
2x+5 +6x-7 +60 =180
8x+ 58 = 180
-58 -58
8x=122
x=15.25
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When sandy and allen's mother decorates the house by herself, it takes her 5 hours.When both Sandy and Allen help, the three can
Yuri [45]

If you're asking how this is possible,

Answer and explanation:

If Sandy and Allen's mother does the job in 5 hours

And Allen and Sandy's contributions completes the job in 2.5 hours

5 hours - 2.5 hours =2.5 hours

Allen and Sandy's contribution is half of the time it took only Allen and Sandy's mother= 2.5 hours

Therefore Allen and Sandy together will take 2.5×2 = 5 hours to complete the job alone without their mother

A similar example: if it takes one person 2 hours to peel 5 potatoes and it takes 1 hour to peel same number of potatoes if a second person helps, then this second person reduces the time used by 1 hour(50%) and would take 2 hours to complete the work.

6 0
3 years ago
Find the circumference and area of a circle with the diameter of 14 inches
VLD [36.1K]

Answer:

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Area = PI * radius^2

Area = PI * 7^2

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Step-by-step explanation:

5 0
4 years ago
I need to know the value of pi number, you know, the one with two parallel lines and one in a horizontal form in top, please hel
Talja [164]

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Step-by-step explanation:

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4 years ago
One hundred divided by the quantity three times fives
AlladinOne [14]

For this case we have:

One hundred equals 100

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So, rewriting the expression we have:

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One hundred divided by the quantity three times fives is equivalent to \frac {20} {3}

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3 years ago
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