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bija089 [108]
3 years ago
5

Which equation has an � −intercept of (5,0) and a � −intercept of (0, −2.5)?

Mathematics
1 answer:
mestny [16]3 years ago
7 0
So much clearer!  Thank you (seriously).

Use the point-slope form of the eq'n of a str. line.  Find the slope first:
         0-(-2.5)         2.5
m = ------------- = -------- = 1/2
           5 - 0              5

Then,    y-0 = (1/2)(x-5)

Which answer choice do you believe matches this?

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In a simple random sample of 300 boards from this shipment, 12 fall outside these specifications. Calculate the lower confidence
Lyrx [107]

Answer:

The 95% confidence interval for the percentage of all boards in this shipment that fall outside the specification is (1.8%, 6.2%).

Step-by-step explanation:

In a random sample of 300 boards the number of boards that fall outside the specification is 12.

Compute the sample proportion of boards that fall outside the specification in this sample as follows:

\hat p =\frac{12}{300}=0.04

The (1 - <em>α</em>)% confidence interval for population proportion <em>p</em> is:

CI=\hat p\pm z_{\alpha/2}\sqrt{\frac{\hat p(1-\hat p)}{n}}

The critical value of <em>z</em> for 95% confidence level is,

z_{\alpha/2}=z_{0.05/2}=z_{0.025}=1.96

*Use a <em>z</em>-table.

Compute the 95% confidence interval for the proportion of all boards in this shipment that fall outside the specification as follows:

CI=\hat p\pm z_{\alpha/2}\sqrt{\frac{\hat p(1-\hat p)}{n}}\\=0.04\pm1.96\sqrt{\frac{0.04(1-0.04)}{300}}\\=0.04\pm0.022\\=(0.018, 0.062)\\\approx(1.8\%, 6.2\%)

Thus, the 95% confidence interval for the proportion of all boards in this shipment that fall outside the specification is (1.8%, 6.2%).

6 0
3 years ago
timothy bought 12 of his cars to the babysitters. these toy cars represent 30% of his toy car collection. what is the total numb
omeli [17]

If 30% of his collection is 12 cars, then we can use the fraction

30/12=100/x

x=40

7 0
3 years ago
Find the equation of the line that is parallel and passes through the point (9,6) find the equation of the line perpendicular
masya89 [10]
Any line parallel to this line can be written as y=-2/3x+c and passes through (9,6).thus 6=-2/3(9)+c.c-6=6.c=12.equation is y=-2/3x+12.
3 0
3 years ago
19+4n<br><br> But "n=4"<br><br> IF YOU DON'T EXPLAIN OR PUT A FAKE ANSWER YOU WILL BE REPORTED
salantis [7]
Sub the number in
19 + 4(4)
= 19 + 16
= 35
multiplication is first because of bedmas
8 0
3 years ago
Read 2 more answers
In a class of 34 students, 19 of them are girls.
Colt1911 [192]

Answer:

55.9%

Step-by-step explanation:

To find the percent that are girls, take the number of girls over the total number of students

19/34

.558823529

To change to percent form, multiply by 100%

55.8823529%

To 1 decimal place

55.9%

5 0
3 years ago
Read 2 more answers
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