Which of the following are zeros of the function P(x) = 4x4 + 8x3 - 7x2 - 21x - 9.

(1+/- sqr rt of 3) / 2
(1+/- sqr rt of 5) / 2
(1+/- sqr rt of 7) / 2
3/2

step-by-step explanation:

total income = price of one ticket   *   number of tickets sold

  y                 =     4                                   x

so the equation is y=4x     with x≥0   because number of tickets sold can not be negative

thus the equation is a semi -line with an end point at

(0,0)

passing through :

x=1     y=4(1) = 4   so through (1,4)