Answer: The constant is -4 cause it will never change from x or y value.
Step-by-step explanation:
Answer: 0.24
Step-by-step explanation:
You have to multiply the percent by its decimal form and then you multiply the decimal by the cost of the meal
The Definition of Porcentage is given by:
Where Vx is discounted value or increased, and Vt is total value. The discount decreases the "p" value.

If you notice any mistake in my english, please let me know, because i am not native.
The first box is 15
the second box is 27
the third box is 36