Which of the following is a one-to-one function? a. y=[x] b. f(x)={5x-1: x< -2 x-9: x> (or equal to) -2 c. y= ixi d. f(x)={4: x< 0 5: 0< (or equal to)x< (or equal to)2 6: x> 2 i think it's a but i'm really not positive

Christina can paint 420 square feet in 105 minutes. which unit rate describes the scenario?

James is playing his favorite game at the arcade. after playing the game 3 times, he has 8 tokens remaining. he initially had 20 tokens, and the game costs the same number of tokens each time. the number t of tokens james has is a function of g, the number of games he plays. write the function’s formula? t=

Consider the polynomials given below. p(x) = x4 + 3x3 + 2x2 – x + 2 q(x) = (x3 + 2x2 + 3)(x2 – 2) determine the operation that results in the simplified expression below. 35 + x4 – 573 - 3x2 + x - 8 a. p+q b. pq c.q-p d. p-q