The length of the room is 156 inches because 8 x 156 is 1248
Answer:

Step-by-step explanation:
slope of r:

s is perpendicular to r:

Step: 3 and 4
In step 3 you were suppose to add 34 to both sides to cancel it out which should have given you positive 17x=40
Im kinda confused if the problem is 2(10-13)=-34x+60 were did you get 9x and 26x on the left side