Y= 5x + 2
4x - y = 0
is (2,12) a solution of the system?

No

Step-by-step explanation:

if you plug the top equation into the bottom equation, you would get

4x-(5x+2)=0

4x-5x-2=0

-x=2

x=-2

x would equal -2 which would then make y = -8

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.

step-by-step explanation:

one of the most important purposes of surface treatment is to alter surface properties according to the requirement of specific applications. for example, hydrophobic coating has been utilized on windshield and eyeglasses. gold atom monolayer on substrate has become a popular surface bioconjugation strategy.