Which of the following pairs of functions are inverses of each other

What is the difference between the predicted value and the actual value

Write an inequality for this description. - one fourth of the opposite of the difference of five and a number is less than twenty.

Can someone plz me understand how to do these. plz, show work.in exercises 1-4, rewrite the expression in rational exponent form.[tex]\sqrt[4]{625} \sqrt[3]{512} (\sqrt[5]{4} )³ (\sqrt[4]{15} )^{7}\\ (\sqrt[3]{27} )^{2}[/tex]