Are the two expressions equivalent? how do you know? 5x + 3x and 5(3) + xy

Which point on the x-axis lies on the line that passes through point c and is parallel to lino ab?

Consider the set of all four-digit positive integers less than 2000 whose digits have a sum of 24. what is the median of this set of integers?

You just purchased two coins at a price of $670 each. because one of the coins is more collectible, you believe that its value will increase at a rate of 7.1 percent per year, while you believe the second coin will only increase at 6.5 percent per year. if you are correct, how much more will the first coin be worth in 15 years?