WILL GET 15 POINTS AND MARKED BRAINLINESt 1. Create your own expression that contains at least one operation and one variable.

example: 5x

2. Describe a situation that your expression can model.

example: x represents the price of a pound of grapes, in dollars. Cheryl buys 5 pounds of grapes. The cost of Cheryl's grapes can be modeled by 5x

4x+5

Step-by-step explanation:

4x represents making 4 dollars per hour and 5 represent the amount of money you began with

2

step-by-step explanation:

vvvvv

reduce the friction between its moving parts

step-by-step explanation:

in fact, by reducing the friction between the moving parts of the machine, it is possible to reduce the energy wasted due to this friction; therefore, more input energy is converted into useful work, and this will improve the efficiency of the machine.