The mean of five numbers is 6. if one of the numbers is removed, the mean becomes 7. what is the value of the number that was removed?

mean = sum/number

 so 6= sum/5  6 x 5 = sum. 6 x 5 = 30

7= 30-r/4

28=30-r

30-28 = r

r=2

 so the number 2 was removed

answer:

c 60% on edg

3. (5x + 1) - (-10x + 6)

simplify the answer choice. combine like terms. remember to distribute the negative to the terms inside the second parenthesis. also remember that two negatives = one positive, and one of each sign = negative.

- (-10x + 6) = + 10x - 6

simplify. combine like terms:

5x + 1 + 10x - 6

5x + 10x + 1 - 6

15x - 5

∴ it is your answer

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