Simplify and Evaluate Expressions

Simplify the expression: 
3(1 - 2x) + 7

• 21 - 6x

• 24 + 6x

• 10 + 6x

• 10 - 6x

Evaluate the following expression:
-3x² - 5x + 7 when x = -2

• 5

• 10

• 12

• 7

Evaluate the following expression:
-x - 6x + 10 when x = 5

• -20

• -25

• 25

• 20

Evaluate the following expression:
25x(x - 4) when x = -1

• 100

• 115

• 125

• 130

Evaluate the following expression:
x² + 5 - x when x = 5

• 25

• 33

• 20

• 35

Evaluate the following expression:
x² + 3y when x = 2 and y = -8

• -20

• 20

• 24

• -24

Evaluate the following expression:
t² - t + 1 when t = 5

• 25

• 22

• 23

• 21

Simplify the expression by combining like terms:
4h³ + h + 3h - 6h³ + 2h²

• h³ + 3h + 2h²

• 4h³ + 2h²

• -4h³ + h + 2h²

• -2h³ + 4h + 2h²

Simplify the expression by combining like terms:
k³ + m + m - k³ + k² + k²

• 2k³ + 2m + 2k²

• 2m + 2k²

• 2k² + 2m

• k³ + m + m - k³ + k² + k²

Simplify the expression by combining like terms:
6p³ + m² + h - p³ + m² + 5h

• 6p³ + 2m² + 5h - p³

• 7p³ + 2m² + 5h + p³ 

• 5p³ + 2m² + 6h - p³ 

• 4p³ + 2m² + 6h + p³