Question

What did i doo wrong i picked #2
Which property is used in Step 1 of simplifying the expression five times the quantity z minus x end quantity plus z plus zero?

Expression: 5(z – x) + z + 0

Step 1: 5z – 5x + z + 0

Step 2: 5z + z – 5x + 0

Step 3: 5z + 1z – 5x + 0

Step 4: 6z – 5x + 0

Step 5: 6z – 5x

Zero Property of Multiplication

Identity Property of Addition

Distributive Property

Associative Property of Multiplication

Answer 1

In step 1, the 5 was DISTRIBUTED to z - x to produce 5z - 5x

Answer 2

I think it's the distributive property.

http://en.wikipedia.org/wiki/Distributive_property