What is the literal coefficient of -3z?

What is the numerical coefficient of '-y'?

The literal coefficient of-y is

What is the numerical coefficient of 'x'?

The relation between U, P and V for an ideal gas is U = 2 + 3PV. What is the adiabatic coefficient of gas.

The numerical coefficient of -3z is

Coefficient of x in 3x

What happens to the coefficient of friction if the weight of the body is doubled ?