To find the answer to the questions ask?

x=6

Step-by-step explanation:

First. We find the x intercept obviously. If y=0 then we have 5x - 6(0) = 30. That simplifies to 5x = 30. We divide both sides by 5 to get x by himself. so we have x=6. Now that we have our x intercept. We want to make a table. of three above and three below the x intercept. To have an easier time to mark our line. Just input 3 then 4 then 5 then 6 then 7 then 8 then 9 in for x. And you will find all your 7 y's. and you have all 7 x's because you just made them!

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.

you didn't give me the choices, so i will just give you the graph so you can look at your choices and choose the right one.