100%
Students in grades 7 and 8 were asked which food they liked best. The results are shown in the table.
Favorite Food

What percentage of all students prefer hot dogs?
A. 25%
B. 27.5%
C. 30%
D. 45.5%
E. 55%

55/200 in percentage is 27.5 percent

So answer is 27.5

- 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