SOLUTION: Use an inequality to solve
Jim has gotten scores of 88 and 69 on his first 2 test. What score must he get on his third test to kee an average of 85 or greater?
I got
x>88
Question 420050: Use an inequality to solve
Jim has gotten scores of 88 and 69 on his first 2 test. What score must he get on his third test to kee an average of 85 or greater?
I got
x>88
Could that be correct? Found 2 solutions by sudhanshu_kmr, solver91311:Answer by sudhanshu_kmr(1152) (Show Source):
Not even close. Think about how you would find the average of the test scores if you knew what all three of them were. You would first add up all of the scores and then divide that sum by 3. That means that 3 times 85 is the least that the sum of the three scores can be, hence, if is the score you don't know:
Now all you have to do is to solve the inequality for
Notice the use of because the problem says "85 or greater" not "greater than 85."
John
My calculator said it, I believe it, that settles it
