Homework Help: Math

Posted by Sarah on Wednesday, December 5, 2012 at 3:22pm.

I have a 73.3 and that is worth 70% of my mark. My final is worth 30%. What do i need to get on my final to finish with anything over a 70%?

Math - Reiny, Wednesday, December 5, 2012 at 3:35pm
(70/100)(73.3 + (30/100)x = 70
70(73.3) + 30x = 7000
30x = 1869
x = 62.3

you will need 62.3% on your final

check:
.7(73.3) + .3(62.3) = 70

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