Why functions are multiplied, and where the resulting functions are used in real life.

Step-by-step explanation:

functions are use in money machines, soda machines we use functions for Basic economics and a lot of things, for example, you can use functions whenever you buy a sale the first thing u calculate is the discount. For example, I want to buy this 20 dollar shirt, and it is on sale at 15% off.

2(2x + 3) = -4 + 2(2x + 5)

4x + 6 = -4 + 4x + 10

4x + 6 = 4x + 6

4x - 6 + 6 = 4x - 6 + 6

4x = 4x

x = x

unlimited solutions.