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frosja888 [35]
3 years ago
5

What number should be removed from the list {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13} so that the mean of the remaining number

s is 7.25?
Mathematics
1 answer:
Julli [10]3 years ago
7 0

Answer:

3

Step-by-step explanation:

1+2+4+5+6+7+8+9+10+11+12+13 = 87

87/12 +7.25

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Answer:

Step-by-step explanation:

Comment

The angle supplementary to x and 3x are equal.

Supplementary angles = 180

Solution

x + 3x = 180

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4x/4 = 180/4

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1 year ago
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Anna35 [415]

Answer:

x=8.5

Step-by-step explanation:

To solve this equation, we want to find out what x is. To do this, we need to get x by itself.

Perform the opposite of what is being done to the equation. Remember to perform everything to both sides.

4(x-5)=14

4 is being multiplied by x-5. The opposite of multiplication is division. Divide both sides by 4.

4(x-5)/4=14/4

x-5=14/4

x-5=3.5

5 is being subtracted from x. The opposite of subtraction is addition. Add 5 to both sides.

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Both sides of the equation are the same, so we know our solution, <u>x=8.5 </u>is correct.

6 0
2 years ago
Read 2 more answers
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