Determine the domain of each rational function, and express the rule for each function in an equivalent form in
lowest terms.
a. f(x) = x4 / x2
b. f(x) = 3x + 3 / 15x − 6
c. f(x) = x2 − x − 2 / x2 + x
d. f(x) = 8x2 + 2x − 15 / 4x2 − 4x − 15
e. f(x) = 2x3 − 3x2 − 2x + 3 / x3 − x
f. f(x) = 3x3 + x2 + 3x + 1 / x3 + x

the answer to the expression is 83

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.

b

step-by-step explanation:

yes

step-by-step explanation:

so of course you want to start by plugging the 5 in which goes to 7(5)+3(5)=50 because 7*5=35 and 3*5=15 and then add them together, then plug in the 5 to the other equation as well 9(5)+5=50 because 9*5= 45 and then add 5 and so yes they are equivalent.