Marta ate a quarter of a whole pie. edwin ate 1/4 of what was left. cristina then ate 1/3 of what was left. what fraction of the pie remains? answer is 3/8 how do you come up with this answer?

Step-by-step explanation:

Maria ate a quarter of a whole pie =

Left over pie =

Edwin ate 1/3 of what was left =

Left over pie =

Cristina ate 1/3 of what was left =

Left over pie =

- 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

rx and sx

step-by-step explanation: