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Posted by **Mitch** on Thursday, October 6, 2011 at 1:31pm.

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?

- math questions -
**drwls**, Thursday, October 6, 2011 at 1:37pm1) 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 1:40pm1)

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 2:07pmfor 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=

-2 + -1 = -3

- math questions -
**Ms. Sue**, Thursday, October 6, 2011 at 2:13pmI'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 2:18pmOK 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 2:37pmIt 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 2:43pmOK I get it now

thank you

- math questions -
**Ms. Sue**, Thursday, October 6, 2011 at 2:53pmMarko/Mitch -- please keep the same name on your posts.

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