Each rug is 1/8 of the floor space. So, 4 rugs would cover half of the floor space. Multiply, then reduce.
4(1/8)=4/8 or 1/2
Check the formula of future value of annuity ordinary (through Google)
FVOA=100[((1+0.13/12)^(12)-1/(0.13/12)]
FVOA=1274.15
Formulas:
y=x-2
y=-1x+6
You'll basically just graph these which you said you can do, and if you don't want to, just input these formulas in Desmos Graphing Calculator, and the point that they intersect is your answer for the point of intersection
