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2 years ago

10

I need help with this will mark u as brainliest.

1 answer:

Amanda [17]2 years ago

7 0

1. B
2. A
3. D
4. D
I'm not too sure about 1 but I'm sure about the others. Hope this helps!

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Steve's sister is 25 years old. her age is 5 years more than 4 times his age.

Virty [35]

Answer:

Steve is 5

Step-by-step explanation:

Steves sister is 25, she is 5 years more than 4 times steve is.

5 * 4 = 20 and the sister is 5 years older so,

Steve is 5

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2 years ago

Troy’s canoe is 18 feet long. Ariel’s canoe is the length of Troy’s canoe.

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Evaluate the expression. (-3)^-2

Wewaii [24]

$~~(-3)^{-2}\\\\\\=\dfrac 1{(-3)^2}~~~~~~~~~~~~~~~~~~~~~~~~~;\left[k^{-n} = \dfrac 1{k^n},~~~ k \neq 0\right]\\\\\\=\dfrac 1{(-1)^2 \cdot 3^2}\\\\\\=\dfrac 1{1 \times 9}\\\\\\=\dfrac 19$

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1 year ago

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What is the sum of a seven-term geometric series if the first term is -2, the last term is

ExtremeBDS [4]

Answer:

-26042

Step-by-step explanation:

sum of a finite geometric series =

$\frac{a_1(1-r^n)}{1-r}$

here, a1 is the first term, r is the common ratio, and n is the number of terms

a1 = -2

r = -5

n = 7

$\frac{a_1(1-r^n)}{1-r} = \frac{-2(1-(-5)^7)}{1-(-5)} = -26042$

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1 year ago