Which property was applied to create this equivalent expression?

7 x + (5 + 6 x) right-arrow (7 x + 5) + 6 x
the commutative property only
the associative property only
the distributive property only
both the commutative property and the associative property

Two streets intersect at a 30- degree angle. at the intersection, the are four crosswalks formed that are the same length. what type of quadrilateral is formed by the crosswalks?

Cheryl works as a hotel maid. the number of hotel rooms she cleans is directly proportional to the number of hours she works. the graph shows that r rooms are cleaned in t hours.

Technical improvements catechnical improvements cause production costs to decline, which causes to increase and prices to decreased unemployment causes consumer incomes to use production costs to decline, which causes to increase and prices to decreased unemployment causes consumer incomes to