It's simple .....
just subtract R and C.....
so 50x+10-10x-275
= 40x-265
so the answer is B
I would solve it for B, but that's just what I think. So you would do -12 time -2 which is 24, then subtract 24 from both sides so that you would get B=-31
He spent 27.7 repeating minutes of his class talking.
10.05 = 10 5/100 = 10 1/20
10.005 = 10 5/1000 = 10 1/200
therefore, 10.05 is greater then 10.005