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yKpoI14uk [10]
2 years ago
13

What number must be added to 15,-6, and 12 to have a mean of 5? Explain.

Mathematics
1 answer:
Genrish500 [490]2 years ago
3 0

You need to add a -1

We can find this by setting up the equation like so

x + (-6) + 12 + 15 / 4 = 5

x + 21 = 20

x = 20 -21

x = -1

Now if we insert -1 where x is located in the equation, you will get a means of 5

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Answer:

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Step-by-step explanation:

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This can be obtained from using the following simple methodology;

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6 0
3 years ago
2x^2 + 3x - 12 when x = 5 help pls
cluponka [151]

\huge\textsf{Hey there!}

\mathsf{2x^2 + 3x - 12}

\mathsf{= 2(5)^2 + 3(5) - 12}

\mathsf{5^2}

\mathsf{= 5 \times 5}

\mathsf{\bf = 25}

\mathsf{2(25) + 3(5) - 12}

\mathsf{2(25)}

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\mathsf{3(5)}

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\mathsf{50 + 15}

\mathsf{= \bf 65}

65 - 12

\mathsf{= \bf 53}

\boxed{\boxed{\huge\textsf{Answer: \bf 53}}}\huge\checkmark

\large\textsf{Good luck on your assignment and enjoy your day!}

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5 0
2 years ago
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ira [324]

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Step-by-step explanation:

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