Answer:
x=1, x=4
Step-by-step explanation:
Melanie made the first error in step 4; csc(x) .
Answer: tanks of gas
Step-by-step explanation:
Let the x be the number of tanks of gas, then
The amount of gas used by first car=
The amount of gas used by second car=
The amount of gas used by third car=
Thus, the total change in the amount of gas for all three cars=
Since, the amount of gas tanks of gas is used for all three cars.
Therefore, the total amount would be negative .
hence, the answer is tanks of gas.