If m = 9, what is the value of the expression 3m - 4?

The answer is 23.

Step-by-step explanation:

Plug in 9 for the m-value in the equation to get 3(9) - 4.  Multiply the 9 by 3 to get 27 and then subtract 4 to get your answer.

true statements:

a) x + y = y + x   ⇒ commutative property of addition

b) (x * y) * z = x * (y * z) ⇒ associative property of multiplication

d) (x + y) + z = x + (y + z) ⇒ associative property of addition

false statements:

c) x - y = y - x   should be: x - y = - y + x

e) (x - y) - z = x - (y - z) should be: (x - y) - z = x - (y + z)

step-by-step explanation: