Marty's favorite hawaiian pizza is made up of a ratio of 7 to every three pieces of ham

Parabolas y=−2x^2 and y=2x^2 +k intersect at points a and b that are in the third and the fourth quadrants respectively. find k if length of the segment ab is 5.

Elena is paid a constant rate for each hour she works. the table shows the amounts of money that elena earned for various amounts of time that she worked.

What is the inverse of the function f(x) = 2x + 1?