3 years ago

What is the percent decrease from 120% to 90%

Mathematics

1 answer:

boyakko [2]3 years ago

7 0

30% decrease.

120-90 = 30

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The cost, in dollars, of producing x belts is given by C(x) = 634 + 18x - 0.071 x^2. Find the rate at which average cost is chan

o-na [289]

Answer:

When 324 belts have been produced, the average cost is changing at -28 dollars for each additional belt.

Step-by-step explanation:

The cost of producing x belts is given by:

$C(x) = 634 + 18x - 0.071x^{2}$

Find the rate at which average cost is changing when 324 belts have been produced.

This is $C'(324)$ . So

$C(x) = 634 + 18x - 0.071x^{2}$

$C'(x) = -0.142x + 18$

$C'(324) = -28$

So the correct answer is:

When 324 belts have been produced, the average cost is changing at -28 dollars for each additional belt.

5 0

3 years ago

I need help answering this question

Advocard [28]

Answer:

$x = 17$

Step-by-step explanation:

Since line m is parallel to line n, therefore:

$(6x + 5) + (5x - 12) = 180$ (consecutive interior angles are supplementary)

Solve for x

$6x + 5 + 5x - 12 = 180$

Add like terms

$11x - 7 = 180$

Add 7 to both sides

$11x - 7 + 7 = 180 + 7$

$11x = 187$

Divide both sides by 11

$\frac{11x}{11} = \frac{187}{11}$

$x = 17$

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3 years ago

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denis-greek [22]

255 Is the correct answer

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3x + 1 = 7 What is the value of x?

Olin [163]

The value for X is 2

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You have $15 to spend in a candy store. If Kitkat cost $0.75 each and mini Snickers are $0.25 each.

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Step-by-step explanation:

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3 years ago

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