Ahigh school is conducting a survey to see how many students have part-time jobs. determine whether the samples are biased or unbiased. explain why it’s biased or unbiased.

a) five random students in each homeroom

b) every 10th student that enters a school football game

c) 100 random students in the school parking lot

I do think it is ("A,,) sorry if I'm wrong

- 2 + 10x³ - 21x² + 19x - 4

step-by-step explanation:

each term in the second factor is multiplied by each term in the first factor

x²(- 2x² + 4x - 1) - 3x(- 2x² + 4x - 1) + 4(- 2x² + 4x - 1) ← distribute

= - 2 + 4x³ - x² + 6x³ - 12x² + 3x -8x² + 16x - 4

collect like terms

= - 2 + 10x³ - 21x² + 19x - 4 ← in standard form

yes. we do proportions in probabilities.