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Roman55 [17]
3 years ago
11

Rates for having a manuscript typed at a certain typing service are $5 per page for the first time a page is typed and $3 per pa

ge each time a page is revised. If a certain manuscript has 100 pages, of which 40 were revised only once, 10 were revised twice, and the rest required no revisions, what was the total cost of having the manuscript typed? a) $430 b) $620 c) $650 d) $680 e) $770
Mathematics
1 answer:
Goryan [66]3 years ago
6 0

Answer:

D. $680

Step By Step Explanation:

100 pages are typed. Each page coast $5 to type.

100 x 5 = 500

40 pages are revised once. It costs $3 to revise a page once.

40 x 3 = 120

10 pages are revised twice. It costs $3 to revise a page once so it will cost $6 to revise it twice

10 x 6 = 60

To find the total cost we add all the amounts together

500 + 120 + 60 = 680

The final answer is $680

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Why is the product of negative reciprocals always -1?
erik [133]

Answer:

please check the explanation.

Step-by-step explanation:

Let suppose we have a number = n  

  • n≠0    

The negative reciprocal of 'n' = -1/n

Taking the product of 'n' and its negative reciprocal '-1/n':

n\left(-\frac{1}{n}\right)

remove parentheses: (-a) = -a

=-n\frac{1}{n}

\mathrm{Multiply\:fractions}:\quad \:a\times \frac{b}{c}=\frac{a\:\times \:b}{c}

=-\frac{1\times \:n}{n}

\mathrm{Cancel\:the\:common\:factor:}\:n

=-1

Canceling the common factor (the number itself) will bring -1.

It proves that the multiplication of any number and its negative reciprocal will always yield -1.

3 0
3 years ago
What is 7 1/2 increased by 5 1/4?​
g100num [7]

Answer:

12.75

Step-by-step explanation:

12 3/4

5 0
2 years ago
I have up to 8 I just really need help with the rest
nlexa [21]

9. In two years it would be (2,20) find the point on the grid and mark the spot.

In three years it would be (3,40) also mark that spot on the grid.

In four years it would be (4,80) mark this point on the grid

All I'm doing is finding the number of the year and going up till it meets the red line or population amount.

Hope this helped you a little.

8 0
3 years ago
Can anyone help me find the value pls?
Flauer [41]

The inside angle for B, which is labeled x is the same as the outside angle of D which is labeled as 72, so we know x = 72.

In a parallelogram two angles next to each other equal 180, so angle A and angle B equal 180.

We know B = 72, so A = 180-72 = 108

Angle A is divided in 2 by angle y, so y = 108/2 = 54

Answers: x = 72

Y = 54

4 0
3 years ago
Sarah is going on a trip. she drives for 2 hours and 20 minutes, rests for 25 minutes and drives for another 2 hours and 40 minu
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Answer:...,,,.

Step-by-step explanation:.....,l,,

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3 years ago
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