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nadya68 [22]
3 years ago
12

Solve each system of equations using the elimination method 3x+8y=2 4x-2y=-10

Mathematics
1 answer:
LenaWriter [7]3 years ago
8 0

x = -2

y = 1

let's multiply second equation by 4 to get a common coefficient of y variable.

16x-8y=-40

add the equations

3×+8y=2

16x-8y=-40

----------------

3x+16x = -38

19x = -38

x = -2

substitute x

3×-2 + 8y = 2

-6 + 8y = 2

8y = 2+6

y = 1

check the answer

-6+8 = 2

-8-2= -20

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t = -1.428

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Since population standard deviation is not known, we cannot use z-distribution for this test. We are given the value of sample standard deviation, so t-test will be used for this case.

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3 years ago
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Please Help Me! I need to pass.
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Then you would add 40 with 5% of 40

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Answer:

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