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3 years ago

Solve: -1/4a - 4 = 4

Mathematics

2 answers:

Andrew [12]3 years ago

3 0

The answer would be a=-32

densk [106]3 years ago

3 0

Answer:

a = -12

Step-by-step explanation:

-1/4a - 4 = 4

(-1/4a / -1/4) - 4 = (4 / -1/4)

a - 4 = -16

(a - 4 + 4) = -16 + 4

a = -12

I might have made some mistake but if my memory is right this is how you solve it.

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Add the 6 miles and the 2 miles together.

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2 years ago

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vladimir1956 [14]

Answer:

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Decision rule

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Step-by-step explanation:

From the question we are told that

The percentage of US female workers paid at the minimum wage or less is $k_o =$ 7% = 0.07

The sample size is $n = 500$

The number paid minimum wage or less is x = 42

The significance level is $\alpha =$ 5% = 0.05

Now the probability of getting a US female workers paid at the minimum wage or less is mathematically represented as

$\= k = \frac{x}{n}$

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$\= k = \frac{42}{500}$

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The alternative hypothesis is $H_a :k_o \ne 0.07$

Generally the test statistics is mathematically evaluated as

$z = \frac{\= k - k_o}{\sqrt{\frac{k_o(1-k_o)}{n} } }$

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$z = \frac{0.084 - 0.07}{\sqrt{\frac{0.07 (1-0.07)}{500} } }$

$z = 1.23$

Now the Decision rule is stated as

If the test staistics is greater than the critical value of significance level then $H_o$ is accepted else $H_o$ is rejected

With the above in mind

The critical value of the significance level which is obtained from the table is

$t_{0.05} = 1.645$

Now since the critical value of significance level is greater than the test staistics then the null hypothesis will be rejected

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