Which expression is equivalent to 66 ⋅ 6−9? Question 9 options:

1)

fraction 1 over 6 to the power 3

2)

fraction 1 over 6 to the power 15

3)

1 over 6 to the power negative 3

4)

fraction 1 over 6 to the power negative 15

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.

or

step-by-step explanation:

we need to solve for 'x' the following equation:  

we have that:

⇒

⇒ ⇒

factorizing, we get that:

  ⇒

then, the solutions are: or

nothing extraneous has been found!

answer: your correct answer is b. d.

step-by-step explanation: