(Q-R)+(S-T)
(7m+3n-11-2m)+(n+5- -m-3n+8)
5m+3n-11+-2n+-3+-m
4m+n+-14
A18
18 is the exponent, am not sure because I see this topic a really long time ago, but I think that you multiply the exponent because the sign is multiplication
Answer:
7 Hours 12 Minutes
Step-by-step explanation:
So they one of the printer increases at a rate of 1/12 and the other increases at a rate of 1/18. Since you don't know the time it actually takes, you will replace both numerators with and x. (x/12 and x/18). You want to set these up so that they are adding. (x/12 + x/18=1). Since you're adding, you want to change it to the same denominator. The lowest is 36 so you multiply x/12 by 3/3 (so you don't unbalance the equation) and x/18 by 2/2. You'll end up with 3x/36 + 2x/36= 1 which will simplify to 5x/36=1. Multiply each side by 36 to leave the variable by itself. It becomes 5x=36 and when you divide it by 5 you get 7.2. So it's seven and .2 hours, which is equivalent to7 and 1/5 of an hour or 7 hours and 12 minutes.
I believe it goes like this
If you do,
124.65×36(12×3=36 3 year span)
=4,487.4
Though I'm not 100% sure it is my best guess.
