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Hoochie [10]
3 years ago
10

7.Kristy baked 18 cookies. She took 2/3 of the cookies to work. How many cookies did she NOT take to work? 4 6 8 12

Mathematics
2 answers:
Nonamiya [84]3 years ago
5 0
Its 6
2/3 of 18 = 12
18-12=6
Anit [1.1K]3 years ago
3 0
Here's the equation:
18 - 18 * 2/3
18 - 36/3
18 - 12
6
She didn't take 6 cookies to work.
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Reason:

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Enter the finite geometric series from its given description, and then enter its sum.
Mama L [17]

Answer:

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Step-by-step explanation:

a = 4

r = -5

geometric series:  a_n=ar^{(n-1)} = 4(-5)^{(n-1)}

Determine which term = -12500:

a_n=-12500

4(-5)^{(n-1)}=-12500

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n-1 = ln(3125)/ln(5) = 5

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Using geometric sum series formula: S_n=\frac{a(1-r^n)}{1-r}

Therefore, S_6=\frac{4(1-(-5)^6)}{1-(-5)} =\frac{-62496}{6} =-10416

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