One moving company charges $800 plus $16 per hour. Another moving company charges
$720 plus $21 per hour. At what number of hours will the charge by both companies be the
same? What is the charge?

Hour: 16. The charge: 1056

Step-by-step explanation:

I multipled each number out in the equations

(16 x ?) + 800

(21 x ?) + 720

Then I repeated that over and over again until I got matching numbers.

- 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

step-by-step explanation: