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muminat
2 years ago
9

Stan made changes to

Mathematics
1 answer:
Lemur [1.5K]2 years ago
7 0

Answer:

22%

Step-by-step explanation:

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Estimate and calculate <br><br> 2.7 x (-3.2)
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- 216/25

8 16/25

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6.<br> Write in exponential form: log(3)81 = 4
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log_{3}(81)  = 4 \\  \\ 81 =  {3}^{4}

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Write the expression in standard form<br><br> 1/5(5x−10)−3
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Step-by-step explanation:

1/5(5x-10)-3

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3 years ago
At a farm, there are two huge pits for storing hay. 90 tons of hay is stored in the first pit, 75 tons in the second pit. Then,
Travka [436]

Answer:

63 tons

Step-by-step explanation:

The problem statement asks for the tons of hay removed from the first pit. It is convenient to let a variable (x) represent that amount. This is said to be 3 times the amount removed from the second pit, so that amount must be x/3.

The amount remaining in the first pit is 90-x.

The amount remaining in the second pit is 75 -x/3.

Since the first pit remaining amount is half the second pit remaining amount, we can write the equation ...

... 90 -x = (1/2)(75 -x/3)

... 180 -2x = 75 -x/3 . . . . multiply by 2

... 105 - 2x = -x/3 . . . . . . subtract 75

... 315 -6x = -x . . . . . . . . multiply by 3

... 315 = 5x . . . . . . . . . . . add 6x

... 63 = x . . . . . . . . . . . . . divide by 5

63 tons of hay were taken from the first pit.

_____

<em>Check</em>

After removing 63 tons from the first pit, there are 27 tons remaining. After removing 63/3 = 21 tons from the second pit, there are 54 tons remaining. 27 is half of 54, so the answer checks OK.

6 0
3 years ago
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