Posted by Mitch on Thursday, October 6, 2011 at 1:31pm.
Tims tet grades in french were:
what score must Tim make on his next test to average 92?
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?
- math questions - drwls, Thursday, October 6, 2011 at 1:37pm
1) 99 is correct
2) I would call it a change of +3, since the water level rose going from summer to winter.
- math questions - Ms. Sue, Thursday, October 6, 2011 at 1:40pm
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
- math questions - Mitch, Thursday, October 6, 2011 at 2:07pm
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 dont understand how you get 3 meters
i got -3 meters
-2 + -1 = -3
- math questions - Ms. Sue, Thursday, October 6, 2011 at 2:13pm
I'm sorry. I was wrong for number 1. I added the wrong group of numbers.
DrWLS is right (as usual) :-)
- math questions - Mitch, Thursday, October 6, 2011 at 2:18pm
OK SO 1ST ONE IS 99
I Still dont understand how its +3 difference?
can you explain?
- math questions - Ms. Sue, Thursday, October 6, 2011 at 2:37pm
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.
- math questions - marko, Thursday, October 6, 2011 at 2:43pm
OK I get it now
- math questions - Ms. Sue, Thursday, October 6, 2011 at 2:53pm
Marko/Mitch -- please keep the same name on your posts.
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