Answer: x = -3, 5, 4
Step-by-step explanation:
Don't have time for it
How do you calculate the mean (average) ?
Isn't it just
Mean = (total points of all the tests) divided by (number of tests) ?
Let's work with that.
Multiply each side of that formula by (number of tests), and you have
Total points of all the tests = (Mean) times (number of tests).
In this problem, you know the mean, and you know the number of tests,
so you can easily calculate the total points.
92287262=6282992=72727275=2092÷6&^×=
6x - 7 = 35
6x = 35 + 7 <em> (add 7 and then divide by 6)</em>
6x = 42
x = 42/6
x = 7