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sertanlavr [38]
3 years ago
12

5y-4x=-7 what does x equal

Mathematics
1 answer:
harkovskaia [24]3 years ago
4 0

Answer:

x = \frac{5y + 7}{4}

Step-by-step explanation:

5y - 4x = - 7

5y - 4x + 4x = - 7 + 4x         [adding + 4x on both sides ]

5y + 7 = - 7 + 7 + 4x            [adding 7 on both sides , - 4x + 4x = 0 ]

5y + 7 = 4x                         [ -7 + 7 = 0 ]

\frac{5y + 7}{4}  = \frac{4x}{4}                            [ dividing by 4 on both sides ]

x = \frac{5y + 7}{4}

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<h3>When do we perform one sample z-test?</h3>

One sample z-test is performed if the sample size is large enough (n  > 30) and we want to know if the sample comes from the specific population.

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where \mu_0 is the hypothesized population mean of the money his customer spends in his store.

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Learn more about one-sample z-test here:

brainly.com/question/21477856

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