What is the average (arithmetic mean) of 4x + 5, 7x-6,and -8x+2?

2 ⤊

What is the average (arithmetic mean) of 4x + 5, 7x-6,and -8x+2?

A) x + 1
B) x + 1/3
C) 3x + 1
D) 3x + 1/3
E) 3x + 3 1/3

2007-11-08 00:54:03 · 3 answers · asked by Killa 1 in Science & Mathematics ➔ Mathematics

3 answers

sum = 3x + 1
mean = (3x + 1) / 3
mean = x + 1/3
OPTION B)

2007-11-08 04:30:21 · answer #1 · answered by Como 7 · 2⤊ 0⤋

The arithmetic mean is the sum of the numbers divided by the number of items added.
There are 3 items here so the mean is
(4x+5 + 7x-6 + -8x+2)/3
= (4x+7x-8x + 5-6+2)/3
= (3x+1)/3
= x + 1/3

2007-11-08 01:06:45 · answer #2 · answered by SL 2 · 0⤊ 0⤋

4x + 7x -8x = 3x
5-6+2 = 1
Mean = (3x+1) divide by 3
Answer is B

2007-11-08 01:03:05 · answer #3 · answered by killer babe 1 · 0⤊ 0⤋