If the store purchase an item at a wholesale cost of 3.50 per item and it is sold at a retail value of 5.00 per item what is the gross profit percentage of the item

The gross profit is approx. 30%
$1.50 of $5.00

5 x .30 = 1.5

This law is sometimes called the grouping property. as you can see, regardless of how the numbers are grouped, the answer is still 13. the associative law of multiplication is similar to the same law for addition. it says that no matter how you group numbers you are multiplying together, you will get the same answer.

X=-4  is the answer i think