Mickey incorrectly calculated the unit price:

The correct operation is:

Each carton costs 1.85, so 7 cartons cost
Find common denominators and move from there
One way to see if two ratios are proportional is to write them as fractions and then reduce them. If the reduced fractions are the same, your ratios are proportional.
Answer:
0
Step-by-step explanation:
1/2 * 2 is 1. 1 - 1 is 0
Have a great day/night!
Since y=x+3 (given)
Put value of y in equation x+y=(-3)
x+x+3=(-3)
2x=(-6)
x=(-3)
Put x=(-3) in x+y=(-3)
(-3)+y=(-3)
y=0
So, x=(-3)
y=0