Write the vertex form of a quadratic function with a vertex at (4.5) and a point (8,-3)

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.

.632

step-by-step explanation:

6 * 1/10 = 3/5

3*0.01 = 0.03

3/5 + 0.03 = .63

2*0.002 = .002

.63 + 0.002 = .632

a = 3.14

b = 18

c = 18/5 or 3.6 or 3 3/5

step-by-step explanation: