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katrin [286]
2 years ago
15

If x=7 and y=−2, evaluate the following expression:2xy​

Mathematics
2 answers:
antoniya [11.8K]2 years ago
6 0

Answer:

-28

Step-by-step explanation:

2xy=2(7)(-2)=14(-2)=-28

anzhelika [568]2 years ago
6 0

Answer:

-28

Step-by-step explanation:

2xy\\\\2(7)(-2)\\\\2*7*-2\\\\14*-2\\\\\boxed{-28}

Hope this helps.

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Suppose we take two different random samples from the same population of test scores. The population mean and standard deviation
Leto [7]

Answer:

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Step-by-step explanation:

We are given the following in the question:

A 95% confidence interval is calculated with the following sample sizes

n_1 = 25\\n_2 = 64

The population mean and standard deviation are unknown.

Effect of sample size on confidence interval:

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If we want a confidence interval with greater precision that is smaller width, we have to choose the higher sample size.

Thus, the 95% confidence interval obtained with a sample size of 64 will give greater precision.

3 0
3 years ago
Solve for x. <br><br> 3(x + 5) - 2(x + 2) = 20
IRINA_888 [86]
[tex] 3(x + 5) - 2(x + 2) = 20 \\
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4 0
3 years ago
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Fatima evaluated the expression when m = -2 and n = 4. Her work is shown below.
Kruka [31]

Answer:

The answer to your question is: third option is correct.

Step-by-step explanation:

The third option is correct

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(4,9) is in quarter I and (4,-9) is in quarter IV of the graph. (4,-9) is the point (4,9) reflected over the x-axis. they are similar bc both have 4 as their x coordinate.
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3 years ago
Stuck on this problem, please help
hoa [83]
The answer is :23
B:34
C:56
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2 years ago
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