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wariber [46]
3 years ago
12

Annie and Bertha walk together. When Annie walks 4 steps, Bertha has to walk 5 steps to catch up. If Bertha walks 100 steps, how

many steps does Annie walk?
Mathematics
1 answer:
belka [17]3 years ago
3 0
Cross Multiple
4 5
x 100

400=5x
x=80
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Which statement is true about the parentheses in this expression? [24 − (15 + 2) + 3] − 9
marin [14]

Answer: 0

Step-by-step explanation:

[24 - (15 + 2) +3] -9

[24-(17) +3] -9

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9 - 9 = 0

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3 years ago
The function C(x)=−20x+1681 represents the cost to produce x items. What is the least number of items that can be produced so th
Reptile [31]

Answer:

<em>The least number of items to produce is 41</em>

Step-by-step explanation:

<u>Average Cost</u>

Given C(x) as the cost function to produce x items. The average cost is:

\displaystyle \bar C(X)=\frac{C(x)}{x}

The cost function is:

C(x) = -20x+1681

And the average cost function is:

\displaystyle \bar C(X)=\frac{-20x+1681}{x}

We are required to find the least number of items that can be produced so the average cost is less or equal to $21.

We set the inequality:

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Multiplying by x:

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Adding 20x:

1681 \le 21x+20x

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Swapping sides and changing the sign:

41x \ge 1681

Dividing by 41:

x\ge 41

The least number of items to produce is 41

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Answer:

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Step-by-step explanation:

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