First you would divide everything by bc on both sides to get a by it self. Then you answer will be a=c/bc
You basically need to set up a porporion:
1.6/2.4 = x/7.2
x=4.8
1) first one....90-27=63°
2)180-128=52°>>>>that is B
3)first one is suppliment....so A
4)180-125=55°....I think D....but not in pic !!!
so...go for it !!!
So 10 questions is 100% you missed 30% of the questions so you would do 100%-30% which is 70%
