Select the correct answer. Which relation does not represent a function?
А.{(3, 0), (0, 3)}
B.{(6,-2), (5,-2)}
C.{(3, 4), (3,5)}
D.{(5, 5), (-5,-5)}
E.{(1,-2), (-2, 1)}

Given tan∅=4/3 and π< ∅< (3π)/2; find cos2∅ a. -24/25 b. 24/25 c. -24/7 d. -7/25

Evaluate the following expression 1/3^2

Someone this asap for a group of students attends a basketball game. * the group buys x hot dogs at the concession stand for $2 each. * the group buys y drinks at the concession stand for $3 each. the group buys 29 items at the concession stand for a total of $70. how many hot dogs did the group buy?