Answer:
You could get 5 packs of cookies.
Step-by-step explanation:
Each pack would cost $3.50, so we would have to divide $17.50 by $3.50, which would give us 5 packs of cookies
If u multiply the amount of gallons the pail holds by the amount of pails the tank can hold you would get 225.25 gallons.
Step-by-step explanation:
Let original price be x
Price after 40% discount is $201
Therefore
x × 40% = $201
x = 201 ÷ (40/100)
x = 502.5
Therefore, the original price is $502.5
Hope it helps :)
The two equations are

and

the first equation can be solved for x to be

next you can substitute x in the second equation

Distribute 4 to everything in the parentheses

combine like terms:

subtract 28 from both sides of the equation

divide both sides by -1.5

plug this in to the original equation of x+y=7

subtract 4 from both sides.

Final Answer: they bought 3 adult tickets and 4 student tickets
Hope this helps!
One solution: (0,-8) is the answer