Don't you just plug in the variables 8+(2×3)+(3×4)
Some of the problems are in scientific notation, which if you don't know how to do, I will try to explain, when you see for example 1 x 10^3, what it is saying is basically 1 x 10 x 10 x 10 so in that case 1,000, simple trick is to look at what ever number is in the top right, then add that many zeroes. So this is most likely supposed to be a division problem. if you need more help message me.
Take the area of the room and subtract the area of the rug.
12*10-7*5=
120-35=
85
