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dsp73
2 years ago
15

Avery bought a washing machine originally priced at $864.72 but on sale for 30% off. After 4% sales tax, what was the total cost

?
Mathematics
1 answer:
atroni [7]2 years ago
3 0

Answer: 629.51

Step-by-step explanation: 30% of 864.72 is 259.416

864.72 - 259.416 = 605.304      4% of 605.3 = 24.212     605.3 + 24.21 = 629.51

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Sheree’s brother gave samuel his collection of stamps when she left for college. at that time, the value of the collection was $
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The rate of change of stamp collection was $57.5 per year.

Rate is comparison of two related quantities.

Often the second quantity is time (per second, per hour, etc) but it can be anything.

Can be in the style "this per that" or as a single number calculated using division.

Example: Sam makes 3 pancakes every 6 minutes, that is a rate of:

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By formula the rate of change = Change in cost/ Time taken

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1) Omar has scored 85, 71, and 77 on the first three exams in his math class. If the standard 70,80,90 scale is used for grades
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Answer:

a. 47

b. 87

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Step-by-step explanation:

Assume a total of 4 exams ( first 3 plus a final)

Let final score be X,

Hence,  average score = (85 + 71 + 77 + x) / 4 = (233 + x) / 4

a) to get a C, the average score must be 70

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b) to get a B, the average score must be 80

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c) to get a A, the average score must be 90

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(233 + x) = 90 (4) = 360

x = 360 - 233 =  127 (Ans)

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