The function f is defined by f(x )=150÷x −z , where z is constant. Find z if the value of f at x = 1 5 is equal to 250.

-150

Step-by-step explanation:

The function f is defined by f(x )=150÷x −z , where z is constant. Find z if the value of f at x = 1 5 is equal to 250.

Given the function;

f(x )=150÷x −z

This can also be written as;

f(x )=150/x −z

If f(1.5) = 250, hence;

at x = 1.5, f(x) = 250

Substitute;

250 = 150/1.5 - z

250 = 100 - z

z = 100 - 250

z = -150

Hence the value of z is -150

there would be 365 different 4 digit numbers

step-by-step explanation:

i belive that it is 365 because i asked google

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.