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3 years ago

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Three friends say they are friends A,B and C and they want to buy a teacher a gift so they each put in $10($30 total) and a four

th friend say he is friend D and uses the money and buys a $25 gift and has $5 left and gives each of the three friends $1 back so they technically used $9 each but 9x3=27 and there is $2 left from the $5 but 27+2=29 so when is the last dollar like how does this work?

1 answer:

vlada-n [284]3 years ago

4 0

Answer:

Step-by-step explanation:

You are using the wrong accounting system

Forget the nine dollars.

If the thing bought was 25 dollars, then each one of A B and C put in 25/3 = 8.3333 dollars. If 1 dollar each was going back, then the sum became 9 1/3 dollars. 3 * 9 1/3 = 27 + 1 = 28. There is 2 dollars left. Everything is fine.

25 + 3 = 28

The three each got 1 dollar back. But the total accounted for is 25 + 3 = 28

There's 2 left over. That makes 30. Everything's fine. There is no missing dollar.

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Answer:

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Step-by-step explanation:

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3 years ago

Determine the present value P you must invest to have the future value A at simple intrest rate r after time t. A=$14,000, r=9.5

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Answer:

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Step-by-step explanation:

Amount formula; A = (Principal* rate* time) +Principal

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3 years ago

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Answer:

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3 years ago

The green triangle is a dilation of the red triangle with a scale factor of s=1/3 and the center of dilation is at the point (4,

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Given:

The scale factor is $s=\dfrac{1}{3}$ and the center of dilation is at the point (4,2).

Red is original figure and green is dilated figure.

To find:

The coordinates of point C' and point A.

Solution:

Rule of dilation: If a figure is dilated with a scale factor k and the center of dilation is at the point (a,b), then

$(x,y)\to (k(x-a)+a,k(y-b)+b)$

According to the given information, the scale factor is $\dfrac{1}{3}$ and the center of dilation is at (4,2).

$(x,y)\to (\dfrac{1}{3}(x-4)+4,\dfrac{1}{3}(y-2)+2)$ ...(i)

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Using (i), we get

$C(-2,11)\to C'(\dfrac{1}{3}(-2-4)+4,\dfrac{1}{3}(11-2)+2)$

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Therefore, the coordinates of point A are (16,8).

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3 years ago