math questions
posted by Mitch on .
WORD PROBLEM:
Tims tet grades in french were:
86,96,88,91
what score must Tim make on his next test to average 92?
a 89
b 93
c 97
d 99
I said 99. because when you add all
numbers its 460/5 = 92
2) the water level indicator measures the rise and fall in meters of the water level in a resevoir. The o on the gauge indicates the normal water level in the reservoir. The water level at the end of the summer was
2 and at the end of winter it was 1.
Find the difference between the 2 levels.
2  1 = 3
3 is the difference between the 2 levels.
is that right?

1) 99 is correct
2) I would call it a change of +3, since the water level rose going from summer to winter. 
1)
He has a total of 378 points now.
Total possible for 5 tests is 500 points.
0.92 * 500 = 460 needed for 92%
460  378 = 82% needed on next test.
2) The difference is 3 meters 
for no 1)
I'm confused the data is:
86 96 88 91 which = 361
with a test score of 99
added in its;
86 96 88 91 and 99 = 460 /5 = 92%
and i don't understand how you get 3 meters
i got 3 meters
21=
2 + 1 = 3 
I'm sorry. I was wrong for number 1. I added the wrong group of numbers.
DrWLS is right (as usual) :) 
OK SO 1ST ONE IS 99
I Still don't understand how its +3 difference?
can you explain? 
It was 2 meters below normal at the end of the summer. It was 1 meter ABOVE normal at the end of winter. The water rose 3 meters in the intervening months.

OK I get it now
thank you 
Marko/Mitch  please keep the same name on your posts.