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?
For the first word problem, you are correct. To find the score Tim needs to average 92, you need to add up all his previous scores and divide it by the number of tests. In this case, Tim has taken 4 tests and his total score is 86 + 96 + 88 + 91 = 361. Since he needs to average 92, you can set up the equation (361 + x) / 5 = 92, where x represents the score Tim needs on his next test. Solving this equation, you get x = 99, so the correct answer is d) 99.
For the second word problem, you're also correct. To find the difference between the water levels at the end of summer and winter, you subtract the level at the end of winter from the level at the end of summer. In this case, -2 - 1 = -3, so the difference between the two levels is -3. Therefore, your answer of -3 is correct.