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Lady bird [3.3K]
3 years ago
6

1. Evaluate 8x(2)y9(-2) for x=-1 and y=2

Mathematics
1 answer:
MrMuchimi3 years ago
5 0
1. 8-1(2)2(9)(-2) = 8+72 = 80
2. -(10)(-2) = 20
3. - 1/18xy
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3 x -2^(n-1)

To answer this question, first solve the equation 3 x -2^(n-1) for n=1, n=2,
n=3, n=4, and n=5.

Where n=1
3 x -2^(1-1)
3 x -2^0
3 x 1
n1 = 3


Where n=2
3 x -2^(2-1)
3 x -2^1
3 x -2
n2 = -6


Where n=3
3 x -2^(3-1)
3 x -2^2
3 x 4
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Where n=4
3 x -2^(4-1)
3 x -2^3
3 x -8
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Where n=5
3 x -2^(5-1)
3 x -2^4
3 x 16
n5 = 48


The next step is to find the summation by adding n1 + n2 + n3 + n4 + n5.

3 + (-6) + (12) + (-24) + (48) =
3 - 6 + 12 - 24 + 48
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The answer is C. 33
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4 years ago
I need to know the answer
34kurt

Answer:

32 =  - 8u

u =  - 4

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