If you are trying to find the area, it's 10ft but idk what's the question here.
Twice a number increased by 5= 2x+5
5 decreased by twice a number= 5-2x
twice the difference of a number and 5= 2(x-5)
Twice the sum of a number and 5= 2(x+5)
Five subtracted from twice a number= 2x-5
Twice a number, less 5= 2x-5
the slope is -6/5. This is because it goes down 6, and then to the right for 5. You can also use the slope formula to solve this.