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alexgriva [62]
4 years ago
7

At the beginning of the month, Kimberly had $65.78. Since then, she has received three payments of $32.50 from her babysitting j

ob. Kimberly’s 2 sisters each helped her babysit once during the month, so Kimberly paid them each $8.75.
If Kimberly did not spend any money, how much money does she have now? Enter your answer in the box.
Mathematics
2 answers:
NeX [460]4 years ago
4 0

Answer:

2

Step-by-step explanation:

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Brums [2.3K]4 years ago
3 0
145.78 explanation- she started with 65.78 the she received three payments of 32.50 which equals 97.50. Then you have to add 8.75 plus 8.75 that gives you 17.50 which you have to subtract sense she paid the sisters. I hope this helps !
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A farmer wants to build a rectangular pen and then divide it with two interior fences. The total area inside of the pen will be
irina [24]

Answer:

Dimensions of the pen:

x = 11 ft

y = 6 ft

Step-by-step explanation:

Let call "x"  and "y"  dimensions of the rectangular pen  and  x > y, so the interior fences will be equal to y.

The exterior length is 2*x + 2*y and its cost is (2*x + 2*y ) *20.40

The interior fences are 2*y  and its cost is 2*y* 17

Total cost C  = (2*x + 2*y ) *20.40 +  2*y* 17       (1)

Now area inside the pen is 66 ft²  and it is equal to:

A = x*y    ⇒  66 = x*y   ⇒  y = 66/x

Plugging that value in equation (1) will give C as a function of x

C(x) = [ 2*x + 2* (66/x) ]* 20.40  +  2* (66/x) * 17

C(x) = ( 2*x + 132/x ) 20.40  +  2244/x

C(x)  = 40,80*x + 2692.8/x  + 2244/x

C(x) = 40.80*x  + 4936,8/x

Taking derivatives on both sides of the equation we get

C´(x)  = 40.80 - 4936,8/x²

C´(x)  = 0    ⇒   40.80 - 4936,8/x² = 0   ⇒  40.80 *x² = 4936,8

x² =  4936,8 / 40.80    ⇒  x²  = 121  ⇒  x √121

x = 11 ft

And  y = 66/x   ⇒  y  = 66/11    ⇒  y = 6 ft

3 0
4 years ago
Can someone please answer this question please answer it correctly and please show work please help me I need it
love history [14]

Answer:

The answer would be -10.

Step-by-step explanation:

It's -10 because -8-(-10) = 2

That is equal to -8 + 10 = 2 because two negative together make a positive number.

7 0
3 years ago
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Butoxors [25]

Answer:

y = -4x + 36

Step-by-step explanation:

First, find the slope by calculation (y2-y1)/(x2-x1), you should get -8/2, or -4.

Next, plug the points into the equation y-y1 = slope(x-x1), getting y-28 = -4(x-2).

Simplify the equation and you get y =-4x + 36.

Hopefully this helps- let me know if you have any questions!

3 0
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5/12 x 4/5????????????
riadik2000 [5.3K]

Answer:

1/3

Step-by-step explanation:

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32 ten is the same as ?
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32 tens are the same as 320
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