Answer:
decreasing
Step-by-step explanation:
If you put the function in desmos, everything up until -1 is decresaing still.
T=number of tiles bought
cost at store 1 is 0.79t+24
cost at store 2 is 1.19t
when will be equal cost?
0.79t+24=1.19t
minus 0.79t from both sides
24=0.4t
divide both sides by 0.4
60=t
answer is 60 tiles
-20, -23, -26 (adding three)
Sum means to Add.
So the sum of d and 9 would be d + 9
