Which function forms an arithmetic sequence? a. f(x) = 8(2)^2

b. f(x) = 3x^3 + 1

c. f(x) = 5/x -2

d. f(x) = 2x - 4

Ateacher has $80 to buy workbooks. each work book cost $3. if she buys as many workbooks as possible, how much money does she have leftover? a) $2 b) $4 c) $6 d) $8

Explain why the function is discontinuous at the given number a. (select all that apply.) f(x) = 1 x + 1 a = −1 f(−1) is undefined. lim x→−1+ f(x) and lim x→−1− f(x) exist, but are not equal. lim x→−1 f(x) does not exist. f(−1) and lim x→−1 f(x) exist, but are not equal. none of the above

Anyone know? will mark brainliest if correct