The answer is 180.
12 times 15 equals 180
18 times 10 equals 180
20 times 9 equals 180
1 180 divided by 14 = 12.87^=13 total plates
15
x12
3 0
1 5 0
180 with this you can figure how many more bagels are needed to fill the final plate
15 624/1000 is it supposed to be sipplified?
I'm pretty sure you would have 412.38 (€) because the equation would be $522 × 0.79.
If you mean slope.. the equation to set up is y=mx+b. Using this, and finding out the answer m=2.
Hope this helped!