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2 years ago

Please help! I'll give Brainliest! 20 points!

Mathematics

1 answer:

trapecia [35]2 years ago

3 0

Answer:

Step-by-step explanation:

The mean is the sum of the 5 numbers, divided by 5:

µ = (9 + 18 + 27 + 30 + x)/5 = (84 +x)/5 = 16.8 +x/5

The median of a 5-number set will be the middle number. Depending on the value of x, the mean/median may be 18, x, or 27, so we have three possible equations for x.

16.8 +x/5 = 18

x/5 = 1.2 . . . . . subtract 16.8

x = 6 . . . . . . . . multiply by 5

___

16.8 +x/5 = x

16.8 = 4/5x . . . . subtract x/5

21 = x . . . . . . . . . multiply by 5/4

___

16.8 +x/5 = 27

x/5 = 10.2 . . . . . . subtract 16.8

x = 51 . . . . . . . . . . multiply by 5

___

The sum of the possible values of x is ...

sum = 6 + 21 + 51 = 78

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Step-by-step explanation:

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2 years ago

What is the midpoint of the segment shown below?

Aneli [31]

Answer:

(1, -3/2)

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