1. At a local amusement park, 70% of the rides are made for kids who are 48
inches and taller. If there are 80 rides in
total, how many are made for kids who
are 48 inches and taller?

56

Step-by-step explanation:

first of all there are 80 rides in total. 70/100 is equal to 70%. So, multiplying 70% by 80 gets you with 56!

- 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