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Lubov Fominskaja [6]
3 years ago
14

Please help me out with this!

Mathematics
1 answer:
olganol [36]3 years ago
3 0
A. y-intercept

B. The slope is 3/4, the y-intercept is 0

C. For this one you need to put it in y-intercept form. So, you subtract 2x, and move it over to 12. The equation would look like 6y = 2x + 12.

Then, divide everything by 6, and the equation would look like: y = 2/6x + 2

Thus, the slope is 2/6x and 2 is the y-intercept.
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Subtract 7 from the product 3 times f
ahrayia [7]

Answer:

3f-7

Step-by-step explanation:

6 0
3 years ago
the sales price for a bicycle $315. the original price was first discounted by 5o% and then discounted by 10%. find the original
VMariaS [17]

Answer:

?× ( 1 − 50/ 100 ) × ( 1 − 10/ 100 ) = $ 315            ? = $ 315 /( .5 ) ( .9 ) = $ 700

Step-by-step explanation:

5 0
3 years ago
A random sample of 30 households was selected as part of a study on electricity usage, and the number of kilowatt-hours (kWh) wa
grin007 [14]

Answer:

The 98% confidence interval for the mean usage in the March quarter of 2006, in kWh, was (333.87, 416.13).

Step-by-step explanation:

We have the standard deviation for the sample, which means that the t-distribution is used to solve this question.

The first step to solve this problem is finding how many degrees of freedom, we have. This is the sample size subtracted by 1. So

df = 30 - 1 = 29

98% confidence interval

Now, we have to find a value of T, which is found looking at the t table, with 29 degrees of freedom(y-axis) and a confidence level of 1 - \frac{1 - 0.98}{2} = 0.99. So we have T = 2.462

The margin of error is:

M = T\frac{s}{\sqrt{n}} = 2.462\frac{91.5}{\sqrt{30}} = 41.13

In which s is the standard deviation of the sample and n is the size of the sample.

The lower end of the interval is the sample mean subtracted by M. So it is 375 - 41.13 = 333.87 kWh

The upper end of the interval is the sample mean added to M. So it is 375 + 41.13 = 416.13 kWh

The 98% confidence interval for the mean usage in the March quarter of 2006, in kWh, was (333.87, 416.13).

6 0
3 years ago
Need help ASAP please
KiRa [710]

Answer:

6 minutes

Step-by-step explanation:

6.77-1.25=5.52

5.52/.92= 6

6 0
3 years ago
Read 2 more answers
Find the slope of a line parallel to the line through the given points p(-2,4) q(6,-2)
olchik [2.2K]

Answer:

(-2-4)/(6+2)= -6/8= -3/4

8 0
3 years ago
Read 2 more answers
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