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Tresset [83]
3 years ago
7

Sheri's brother gave Sam his collection of stamps when she left for college. At that

Mathematics
1 answer:
pychu [463]3 years ago
6 0

Answer: $70 per year.

Step-by-step explanation:

Let's say that x is the number of years that has passed and y is how much the stamp is worth.

So we know that in zero years the stamp was worth $420 because that is the time Sheri gave her brother Sam the stamp. That could bring up the coordinates  (0,420) .

Now we know that in 8 years it was worth $980 and that could be the coordinates (8,980)

To find the rate of change we need to find the different between the y value and divide it by the difference in the x values.

420 - 980 = -560

 0-8 = -8

-560/-8 = 70

The rate of change is 70 which means that it grew by $70 every year.

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Set up a proportion:

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Cross multiply:

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Divide 3/4 to both sides or multiply by its reciprocal, 4/3:

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So you had a total of 32 muffins, now subtract this from the amount that blew away to find out how many you have left:

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Answer:

<em>Hence the daughter's present age is 15 years</em>

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<em></em>

Step-by-step explanation:

Let the present age of daughter be x

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5 years ago;

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Since y = 2x + 5

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<em>Hence the daughter's present age is 15 years</em>

<em>The fathers present age is 35 years</em>

<em></em>

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