Question

Joe’s score on the first four math homework assignments one week were 75%, 90%, 80%, 100%. What is the minimum score Joe can get on his 6th math homework assignment so that his average for the week is at least 90%?

Answer 1

[AI-generated answer — Bot GPT 3.5]

To find the minimum score Joe can get on his 6th math homework assignment, we need to calculate the total points he has achieved so far and the total points possible for all his assignments.

Joe scored: 75% + 90% + 80% + 100% = 345%.

Now, we need to find out how many points Joe scored out of the total possible points:

75% + 90% + 80% + 100% = 345% of total possible points

If 345% = total possible points, then 90% = x, where x is the total possible points for Joe to achieve a 90% average.

Now we can set up the equation:

345% = x
90

Cross multiply to solve for x:

345 * 90 = 90 * x
31050 = 90 * x
344.44 = x

Now, we know that Joe needs to achieve at least 344.44 points in total to have a 90% average for the week.

Since Joe has already achieved 345% points, the minimum score he can get on his 6th math homework assignment would be:

344.44 - 345 = -0.56

Therefore, Joe needs to achieve at least -0.56% on his 6th math homework assignment to maintain a 90% average for the week.