Answer:
3 or 4 i belive
Step-by-step explanation:
True.
Since

,

and the solutions are decreasing functions.
Answer:use math-way it would help if not use math papa
Step-by-step explanation:
Answer:
$120.
Step-by-step explanation:
The amount he sells the tool kit for = 80 + 20% of 80
= 80 + 16
= $96.
Let m be the marked price, then
m - 0.20m = 96
0.8m = 96
m = $120.