A solution to an equation is a number when substituted back into the original equation produces a what statement

Mathematics

1 answer:

sergij07 [2.7K]4 years ago

6 0

Answer:

true statement

Step-by-step explanation:

Substituting a solution back into the original equation will make the equation true.

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PLEAASSEEE HELP ASAP!!!

eduard

Answer:

$= 2 \frac{7}{23} \\ \\$

Step-by-step explanation:

$5 \frac{3}{8} - 3 \frac{1}{6} \\ \\ \frac{43}{8} - \frac{19}{6} \\ \\ \frac{258 - 152}{48} \\ \\ \frac{106}{48} \\ \\ \frac{53}{23} = \: \: 2 \frac{7}{23}$

8 0

4 years ago

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Can pretty please help me with 2 math question its due today

Mashcka [7]

Answer:
(4x + 12 ) - ( -8 ) =
4x + 20
Explanation:
Just add them up and form a equation ( this is for the second one )

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3 years ago

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Franchise Business Review stated over 50% of all food franchises earn a profit of less than $50,000 a year. In a sample of 130 c

nydimaria [60]

Answer:

We need a sample size of 564.

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of $\pi$ , and a confidence level of $1-\alpha$ , we have the following confidence interval of proportions.

$\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}$

In which

z is the zscore that has a pvalue of $1 - \frac{\alpha}{2}$ .

For this problem, we have that:

$\pi = \frac{81}{130} = 0.6231$

The margin of error is:

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

95% confidence level

So $\alpha = 0.05$ , z is the value of Z that has a pvalue of $1 - \frac{0.05}{2} = 0.975$ , so $Z = 1.96$ .

Based upon a 95% confidence interval with a desired margin of error of .04, determine a sample size for restaurants that earn less than $50,000 last year.

We need a sample size of n

n is found when $M = 0.04$