Which ordered pair is a solution of the inequalty y<3x + 1? A (-3,-2)
B (3.14)
C (1.-3)
D. (1.6)

Step-by-step explanation:

Since (-3) < 3(1) + 1 is true, option C is correct.

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.

c.

step-by-step explanation:

because first you have to add the 4x, 9x, and the 7x together and you get 20x and then you add the last numbers up and you get 5and then you put the subtraction sign in there and that's how you get the answer.