Question

Fill in the blank so that the resulting statement is true. Name the property of real numbers used; commutative, associative, identity, inverse or distribute.Questions attached

Answer 1

• 80. Commutative property: (-5)(-7) = (-7)(-5)

,

• 84. Distributive property:

`3(4+5)=3\cdot4+3\cdot5`

Step-by-step explanation

80.

Using the commutative property of the multiplication where:

`(a)(b)=(b)(a)`

We can apply it to our problem and get:

`(-5)(-7)=(-7)(-5)`

84.

Using the distributive property of the multiplication where:

`a\cdot(b+c)=ab+ac`

We can apply it to our problem:

`3(4+5)=3\cdot4+3\cdot5`