You’ve earned 52%, 78%, 52%, and 64% on our previous for exams in a math class what do you need to earn on the next exam to have an average of 70% among all exams?

The marks that should be earned on the next exam should be 108%.

Given that,

Based on the above information, the calculation is as follows:

Since there is the average of 70%, so the total should be 350%.

Now the earning on the next exam should be

= 350% - 52% - 78% - 52% - 64%

= 104%

Therefore we can conclude that the marks that should be earned on the next exam should be 108%.

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You'd better hope for some bonus points on the last exam, because you need 104%.

Step-by-step explanation:

70% * 5 = 350%

52% + 78% + 52% + 64% + x% = 350%

246% + x%  = 350%

x% = 104%

she played for 18.75 hours.

step-by-step explanation:

if she played 2/4 of a hour on tuesday. and there is 60 minutes in an hour and 60 divided by 4 is 7.5. and she played 2/4 of an hour on thursday then again 60 divided by 4 is 7.5, you add 7.5+7.5=56.25. now you have to do 1/4 of an hour, it equals 3.75. now you have to add them all up. 3.75+7.5+7.5=18.75

i hope this and i hope you get it right. it took me a while to get this done for you. : )

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