5% X
100. 15. Cross multiply
5×15=75. 100×X=100X
÷ ÷
100=7.5. 100=1
15.00
- 7.50. X=8.50$ sale price i
8 .50. is $8.50
(2+5x)=(4x+7)
-4x on each side
-2 in each side
x=5
I usually drink coffee (lots of it lol)
or I do a little toung twister in my mind a couple times to wake my brain up
or you could just repeat every word the teacher says in ur head
these work for me im not kidding I know how annoying it is to stay awake during ANY class
anyhow, this is what I do, go ahead and try them, if they work for my sleepy head, im sure they'll work for you.
good luck btw!!!