There are 10 kids on the math team. two kids will be selected from the team to compete in the state competition. how many ways are there to select the 2 competitors?

Y=4x^2+x-1 solve using quadratic formula

Which expression is equivalent to sq-80

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.