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allochka39001 [22]
3 years ago
5

HELP PLEASE!!!! A small tree was planted at a height of 8 feet. The tree has been planted for 14 months, and is now 52.8 feet ta

ll. Which equation could be used to find x, the average number of feet the tree grew each month?
Mathematics
1 answer:
PolarNik [594]3 years ago
4 0

i think this is the answer 14x+8=52.8


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the tens digit of a two digit number is 5 greater the units digit. If you subtract double the reversed number from it, the resul
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Given:

The tens digit of a two digit number is 5 greater the units digit.

If you subtract double the reversed number from it, the result is a fourth of the original number.

To find:

The original number.

Solution:

Let n be the two digit number and x be the unit digit. Then tens digit is (x+5) and the original number is:

n=(x+5)\times 10+x\times 1

n=10x+50+x

n=11x+50

Reversed number is:

x\times 10+(x+5)\times 1=10x+x+5

x\times 10+(x+5)\times 1=11x+5

If you subtract double the reversed number from it, the result is a fourth of the original number.

11x+50-2(11x+5)=\dfrac{1}{4}(11x+50)

11x+50-22x-10=\dfrac{1}{4}(11x+50)

40-11x=\dfrac{1}{4}(11x+50)

Multiply both sides by 4.

160-44x=11x+50

160-50=11x+44x

110=55x

Divide both sides by 55.

\dfrac{110}{55}=x

2=x

The unit digit is 2. So, the tens digit is 2+5=7.

Therefore, the original number is 72.

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<h2>Answer:</h2>

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<h2>Step-by-step explanation:</h2>

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