The equation of the line passing through the points (−10, 0) and (−8, 20) can be expressed as y = mx + b. give the value of b.

First find slope:

20-0/-8+10= 20/2= 10

Slope=10

next use point slope form and solve it:

y-0=10(x+10)

y=10x+100

b=100

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.

1/800 is the right answer