X - 2y + 2z = -22 x + 3y - z = 03 x + 2y + 3z = -15

Mathematics

1 answer:

scZoUnD [109]3 years ago

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Solve -2= -(x-8), justifying each step with an algebraic property PLZ HELP

vredina [299]

-2 = -(x-8)
-2 = -x + 8 ( - * + = - and - * - = + )

-2 - 8 = -x +8 - 8
-2 - 8 = -x
-(2+8) = - x
-10 = -x | * (-1)

x=10

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3 years ago

The variable z has a standard normal distribution. find the value z such that the event z > z has proportion 0.08. z = –1.41

andrezito [222]

The appropriate choice is z = 1.41.

The empirical rule tells you 68% of the distribution is within 1 standard deviation, so p(z > 1) ≈ 0.17. This means the z value is more than 1 for the probability to drop to 0.08. The only choice that is greater than 1 is 1.41. (The number is actually about 1.40507.)

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3 years ago

Solve each equation. 2p = 2 p = _____ q - 3 = 7 q = _____

svp [43]

P=1
q= 10
p=1 because 2x1 equals 2
q= 10, because 10 minus 3=7(just add 7+3)

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3 years ago

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Solve 4x+5y=13 for y.

inessss [21]

Y = -4x/5 + 13/5 would be the answer to 4x+5y=13

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