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shutvik [7]
3 years ago
12

Solve for x 9x-7= -7.

Mathematics
2 answers:
DENIUS [597]3 years ago
8 0

Steps to solve:

9x - 7 = -7

~Add 7 to both sides

9x - 7 + 7 = -7 + 7

~Simplify

9x = 0

~Divide 9 to both sides

9x/9 = 0/9

~Simplify

x = 0

Best of Luck!

Reika [66]3 years ago
4 0

Answer:

x = 0

Step-by-step explanation:

9x - 7 = - 7

9x = - 7 + 7

9x = 0

x = 0/9

x = 0

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-4 ( 6 - 2n ) = 30 + 8n <br><br> Please help me
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N = no solution

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Read 2 more answers
In Pennsylvania the average IQ score is 101.5 The variable is normally distributed and the population standard deviation is know
elena-14-01-66 [18.8K]

Answer:

P-value = 0.0368

Step-by-step explanation:

We are given the following in the question:

Population mean, μ = 101.5

Sample mean, \bar{x} = 106.4

Sample size, n = 30

Alpha, α = 0.05

Population standard deviation, σ = 15

First, we design the null and the alternate hypothesis

H_{0}: \mu = 101.5\\H_A: \mu> 101.5

We use One-tailed(right) z test to perform this hypothesis.

Formula:

z_{stat} = \displaystyle\frac{\bar{x} - \mu}{\frac{\sigma}{\sqrt{n}} }

Putting all the values, we have

z_{stat} = \displaystyle\frac{106.4 - 101.5}{\frac{15}{\sqrt{30}} } = 1.789

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P-value = 0.0368

P-value is lower than the significance level.

4 0
3 years ago
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