Ok for this Simplify the following expression using the distributive property 7(z+12)
Explain your answer
You guys keep saying it’s 7z+84 and when you do it you do 7xz & 7x12
But where did the x come from

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:

seems like d

step-by-step explanation: