Frank has test grades of : 84 , 92 , 89, and 93. He wants an average of 90. What grade should he get on his next test in order to get a 90 average?

Question

hero · Answer

Someone posted this same problem earlier

anonymous · Answer

92 i think!

hero · Answer

Yet no proof of how you got the 92

anonymous · Answer

sorry! I multiplied 90*5 to get 450

anonymous · Answer

then subtracted each answer from 450
like 450-84-92...etc

anonymous · Answer

chill out dude

anonymous · Answer

idk if im write im so brain weary rite now

hero · Answer

You shouldn't just post answers without at least showing how you got it. For more info, consult the code of conduct

anonymous · Answer

sorry man! im new here! this is my first day

anonymous · Answer

i showed my work now!

anonymous · Answer

sorry annie!

hero · Answer

Ask the user if he understands it

anonymous · Answer

I'm a GIRL.

anonymous · Answer

its a girl! and annie do you understand how i got that?

hero · Answer

Annie, did you understand anything @awesomeness123 wrote?

anonymous · Answer

Uh...Well I did, but just not the subtracting part.

anonymous · Answer

Like , can't I just add 84 + 92 + 89 + 93 together and subtract the sum of that from 450 ?

anonymous · Answer

okay to get the average you must add together then divide right

anonymous · Answer

so for this we must do the opposite

anonymous · Answer

yes! lol
i made that complicated

anonymous · Answer

sorry im doing math on a virtual school doing math so my brain feels like jelly

anonymous · Answer

Alright, well then I got it. Thanks ♥

anonymous · Answer

im so tired that i wrote doing math twice

anonymous · Answer

yes what you did was correct!

anonymous · Answer

It's okay :)

anonymous · Answer

np! anytime