What is the mean of the numbers represented by x + 1, 3x - 2, and 2x - 5? *I think it's A*?
A. 2x - 2
B. (6x - 7)/3
C. (x + 1)/3
D. x + 4
回答 (3)
Mean of the three numbers
= [(x + 1) + (3x - 2) + (2x - 5)] / 3
= [x + 1 + 3x - 2 + 2x - 5] / 3
= [(x + 3x + 2x) + (1 - 2 - 5)] / 3
= (6x - 6) / 3
= 3(2x - 2) / 3
= 2x - 2
...... The answer is: A. 2x - 2
((x + 1) + (3x - 2) + (2x - 5)) / 3
(6x - 6) / 3 = (6x / 3) - (6/3) = 2x - 2. You're correct; the answer is A).
[ (x + 1) + (3x - 2) + (2x - 5) ] / 3
[ 6x - 6 ] / 3 = 2x - 2______Option A
收錄日期: 2021-04-18 14:52:12
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