math
posted by jenn .
I have an average of 66.67 i need a 70percent to pass the class, what do i need to get on thenext test?

We need to know the total points including those for the next test.

Your question is not quite complete.
How many tests gave you that 66.67 average ?
Suppose it was only one test, then you need x on the next so that
(x+66.67)/2 =70
x+66.67 = 140
x = 73.33
If your 66.67 was the average of 5 tests, then if x is your 6th test
(x + 5(66.67)/6 = 70
x + 333.35 = 420
x = 86.65
Can you see the problem with your question ?