Which property does the equation below demonstrate? 6(3 + 9) = 18 + 54 question 21 options: a. associative b. identity c. commutative d. distributive

Need this asap if anyone can i would be very grateful. if you could show workings that would really

Delbert keeps track of total of the total number of points he earns on homework assignments, each of which is worth 60 points. at the end of the semester he has 810 points. write an equation for delbert’s average homework score a in terms of the number of assignments n.

At your job you're paid $50 per week plus $3 per sale at least how many saled do you need to make in order to have over $250