Question

Write and solve an equation to find the value of the variable.

5.2, 8.3, 8.5, 7.7, 7.8, y; mean = 7.1

5.1
5.3
5.8
3.9

Answer 1

the mean is the average
the average is the sum of all number divided by how many number there are

Answer 2

ok thanks

Answer 3

so you do 5.2+8.3+....+y/6=7.1

Answer 4

Not only y/6
all the sum divided by 6 ok

Answer 5

5.2 + 8.5

Answer 6

what is that?

Answer 7

i said sum everything up

Answer 8

ok mybad

Answer 9

ok work-_^

Answer 10

i got 7.34

Answer 11

for the sum?

Answer 12

(5.2+ 8.3+8.5+7.7+7.8+y)/6 = 7.1

Answer 13

is this what you did

Answer 14

the answer is A. 5.1. The way I solved it was to work backwards. First I multiplied 7.1 by 6 to get the total amount of all the numbers added together. Next I subtracted the total of the numbers we already know (e.g. 5.2, 8.3, 8.5, 7.7, 7.8). The remaining amount is the answer. Let me know if you don't understand what I said so I can explain further.

Answer 15

Also the exact equation is 7.1 X 6 - (5.2 + 8.3 + 8.5 + 7.7 + 7.8) = x