Question

An auto mechanic ordered eight car spark plugs and four truck spark plugs. Car spark plugs cost $.75, and truck spark plugs cost $3.00 apiece. Use the distributive property to find the total cost of these parts.

Answer 1

The answer is 30

0.75*8=6
3.00*8=24
24+6=30

Answer 2

The answer is $18.

Explanation:

The distributive property of multiplication is :

`a(b+c)=a* b+a* c`

Given is:

8 car spark plugs cost $0.75 a piece and 4 truck spark plugs cost $3.00 a piece.

So, we can find the total cost as:

`(8*0.75)+(4*3)`

`6+12` =18

So, the answer is $18.