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3 years ago

What is the x-intercept of the line 4x-8y = 16? Anybody can help me with this?

Mathematics

2 answers:

Alexxx [7]3 years ago

8 0

Answer:

<h2>x-intercept = 4 → (4, 0)</h2>

Step-by-step explanation:

x-intercept is for y = 0.

4x - 8y = 16

<em>Put y = 0 to the equation, and solve for x</em>:

4x - 8(0) = 16

4x - 0 = 16

4x = 16 <em>divide both sides by 4</em>

x = 4

valentina_108 [34]3 years ago

4 0

Answer:

x=4

Step-by-step explanation:

To find the x-intercept, set y=0 and solve for x.

4x = 16

x = 16/4 = 4 . . . . . the x-intercept

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2 years ago

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3 years ago

In a sample of 70 stores of a certain company, 62 violated a scanner accuracy standard. It has been demonstrated that the condi

uysha [10]

Answer:

We need at least 243 stores.

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

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The margin of error of the interval is:

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For this problem, we have that:

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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 $Z = 1.96$ .

Determine the number of stores that must be sampled in order to estimate the true proportion to within 0.04 with 95% confidence using the large-sample method.

We need at least n stores.

n is found when M = 0.04. So

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

$0.04 = 1.96\sqrt{\frac{0.886*0.114}}{n}}$