Six times a number is greater than 20 more than that number

The depth of a lake at a certain point, wich is a function of the distance of that point from shore, is 30 feet.

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.

Which equation can be solved to find x the measure of jk in the apex