Teresa needs to save 25.50 to go to the movies this weekend. She currently has $3. If Teresa makes 7.50 an hour babysitting how many hours does she need to babysit this week

She needs to babysit for 3 hours

Step-by-step explanation: 3 x $7.50 = $22.50. $22.50 + $3 = $25.50

- 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

the expected value of the random variable : 0, 1 and 2

step-by-step explanation: