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3 years ago

To find the answer to the questions ask?

Mathematics

2 answers:

timurjin [86]3 years ago

7 0

The answer is 6.

5*6-0=30

30=30

Luden [163]3 years ago

3 0

Answer:

x=6

Step-by-step explanation:

First. We find the x intercept obviously. If y=0 then we have 5x - 6(0) = 30. That simplifies to 5x = 30. We divide both sides by 5 to get x by himself. so we have x=6. Now that we have our x intercept. We want to make a table. of three above and three below the x intercept. To have an easier time to mark our line. Just input 3 then 4 then 5 then 6 then 7 then 8 then 9 in for x. And you will find all your 7 y's. and you have all 7 x's because you just made them!

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And he runs the same number of miles ask every day. His total distance run for one week is less than 60 miles. Which any quality

stiv31 [10]

Answer:

around 8 or 8.5 miles a day for 7 days

Step-by-step explanation:

60 divided 7 equals 8.5

3 0

3 years ago

How many centimeters long is a leg of an isosceles right triangle if its hypotenuse has a length of 8√2 centimeters?

andrew-mc [135]

Answer:

The leg is 8 cm long

Step-by-step explanation:

An isosceles right triangle has the length of its hypotenuse and opposite equal

Let us call the length x

From Pythagoras’ , the square of the hypotenuse equals the sum of the squares of the two other sides

Thus, we have ;

x^2 + x^2 = (8 √2)^2

2x^2 = 128

x^2 = 128/2

x^2 = 64

x= √64

x = 8 cm

7 0

3 years ago

Help!!! Which equation is represented by the graph below?

ExtremeBDS [4]

Answer:

your answer is CCCCCCC

Step-by-step explanation:

8 0

3 years ago

In a college student poll, it is of interest to estimate the proportion p of students in favor of changing from a quarter-system

Contact [7]

Answer:

n=206

Step-by-step explanation:

Previous concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".

The margin of error is the range of values below and above the sample statistic in a confidence interval.

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The population proportion have the following distribution

$p \sim N(p,\sqrt{\frac{\hat p(1-\hat p)}{n}})$

Solution to the problem

In order to find the critical value we need to take in count that we are finding the interval for a proportion, so on this case we need to use the z distribution. Since our interval is at 99% of confidence, our significance level would be given by $\alpha=1-0.99=0.01$ and $\alpha/2 =0.005$ . And the critical value would be given by:

$t_{\alpha/2}=-2.58, t_{1-\alpha/2}=2.58$

The margin of error for the proportion interval is given by this formula:

$ME=z_{\alpha/2}\sqrt{\frac{\hat p (1-\hat p)}{n}}$ (a)

And on this case we have that $ME =\pm 0.09$ , we can use as prior estimate of p 0.5, since we don't have any other info provided, and we are interested in order to find the value of n, if we solve n from equation (a) we got: