Three posters cost $9.60. at that rate, how many posters can you buy for $48?
a) 5 posters
b) 15 posters
c) 16 posters
d) 153 posters

correct answer is b. wht u got to do is is find out how much is one posters ( 9.60 / 3 = 3.20) and times it by all the answer choices til u c which one end up to the right answer. : p

12: A(2)

14:C(-2/3)

15:D(1)

(im sorry i dont know 13)

Step-by-step explanation:

for 12 you have to do the equation y2-y1 over x2-x1 and then solve it, you get -4/-2 which converts to 2

for 14 you subtract the 2x onto the other side leaving you with 5y=-2x+10 then you have divide eveything by 5 which gives you y=-2/5+2 and -2/5 is your slope.

and for 15 you go up one over one to get to your next point therefore 1 is the slope.(rise over run)