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GREYUIT [131]
3 years ago
12

3. One number is equal to two times a second number. Two times the first number plus two times the second number is 24. If you l

et x stand for the first number and y for the second, what are the two numbers? A. x = 12, y = 6 B. x = 24, y = 12 C. x = 8, y = 4 D. x = –24, y = –12
Mathematics
1 answer:
zloy xaker [14]3 years ago
4 0
One of my friends say it's C. x = 8, y = 4
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Someone please help with this question :)!
Elodia [21]
I think a) would be the answer. I proceeded by elimination: the domaine of the function goes from 3 and continues to infinity, so that leaves with a) and b) as possible answers. Both have the same range and both of their functions reflect over the x axis, so we have to compare the two answer by looking at the position of the function in the graph. The function is in the first quadrant (top right corner), so the position of the function has to be at our right, which leads us to a).
3 0
2 years ago
Two rectangles are similar one has a length of 12 cm and a width of 9 cm and other has a width of 8 cm find the length of the se
Serga [27]

Answer:

13.5

Step-by-step explanation:

the relationship is times 1.125

meaning 9 times 1.125 is 8

Thus 12 times 1.125 is 13.5

6 0
3 years ago
A doctor is measuring the average height of male students at a large college. The doctor measures the heights, in inches, of a s
RoseWind [281]

Answer:

There is a 95% confidence that the true mean height of all male student at the large college is between the interval (63.5, 74.4).

Step-by-step explanation:

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

CI=\bar x\pm z_{\alpha/2}\times\frac{\sigma}{\sqrt{n}}

The (1 - α)% confidence interval for population parameter implies that there is a (1 - α) probability that the true value of the parameter is included in the interval.

Or, the (1 - α)% confidence interval for the parameter implies that there is (1 - α)% confidence or certainty that the true parameter value is contained in the interval.

The 95% confidence interval for the average height of male students at a large college is, (63.5 inches, 74.4 inches).

The 95% confidence interval for the average height of male students (63.5, 74.4) implies that, there is a 0.95 probability that the true mean height of all male student at the large college is between the interval (63.5, 74.4).

Or, there is a 95% confidence that the true mean height of all male student at the large college is between the interval (63.5, 74.4).

4 0
3 years ago
The present shown below is a cube.<br> Find the surface area of the present.
Kruka [31]
To answer this you need to multiply 20 by 20. this gives 400cm
or you can also square 20
3 0
3 years ago
Read 2 more answers
What’s the answer to this ?
vazorg [7]

Answer:

40.49 cm²

Step-by-step explanation:

I hope it helps

8 0
3 years ago
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