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3 years ago

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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Ivahew [28]

Answer:

b = 44 feet 

Step-by-step explanation:

BY Pythagorus theorem :-

=》

$55 {}^{2} = 33 {}^{2} + b {}^{2}$

=》

$3025 = b {}^{2} + 1089$

=》

$b {}^{2} = 3025 - 1089$

=》

$b {}^{2} = 1936$

=》

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7 0

2 years ago

A manager at the bookstore must arrange a collection of 231 books for display. The manager decides to use a combination of 15 sh

Kitty [74]

Answer:

6 tables.

Step-by-step explanation:

If he has 15 shelves, we can put the overall number of books off to the side for a moment. First calculate how many books he COULD put onto shelves. This would be 7*15, since each of fifteen shelves can hold 7 books. Counting by fifteens or using a calculator allows us to see that the shelves can hold 105 books.

Going back to the original number of books, we subtract 105 from the original value. The equation at this point is 231 - 105. The result is 126 books left to put on top of tables. But we're not done yet!

Since a table can hold 25 books, we need to divide the remaining number of books by 25. That would be 126/25. Doing this gives us 5 tables we would need, plus one book let over. Since we've run out of shelves, we MUST use another table just for the final book. That's 5+1, or 6 tables. Let's not forget to label our answer.

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2 years ago

Consider a circle whose size can vary. The circumference of the circle is always 2π times as large as its radius. Let r represen

ser-zykov [4K]

Answer:a) C = 2πr

b) 37.68feet

c) r = C/2π

d) 5.89feet

Step-by-step explanation: