4. A store offers packing and mailing services to customers. If a customer ships a box weighing 4 pounds, it would cost $15. If a customer ships a box weighing 8 pounds, it would cost $23. Identify the following characteristics: a. What is the input? b. What is the output? c. What is the slope? Show your work. d. What does the slope represent in words? e. What is the y-intercept? Show your work. f. What does the y-intercept represent in words?

answer: a

step-by-step explanation:

if xy ~ yz therefore xy would be the same length as yz

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.

fdvs

step-by-step explanation: vsfdvsfvd