Algebraic expression retest

Simplify the following expression:
3 + 5x + 8 - 2x

• -3x² - 11
• 3x² + 11
• 11 - 3x
• 11 + 3x

m plus the product of 6 and n 

• m + 6n
• m - 6 + n
• 6m + n
• m + 6 + n 

Which property best explains the reason the two expressions are equivalent: 
6(x + 4) = 6x + 24

• Distributive Property
• Commutative Property
• Associative Property
• Identity Property of Multiplication

Which algebraic expression represents "the difference between 4 squared and f"? (6.EE.A.2a)

• $4\ \times2\ -$ f

• $4^2-$ f

• f- $4^2$

• $4^2$ f

What phrase could represent the expression 5(m+3)? (6.EE.A.2a)

• 5 times m added to 3

• 5 times the sum of m and 3

• 5 plus the sum of m and 1

• The sum of 5 and m plus 1

Consider the expression

 $5x\ +\ 24t\ +\ 18$  What mathematical term describes both 5 and 24? (6.EE.A.2b)

• Coefficient 

• Term

• Difference

• Sum

Combine like terms to find an expression that is equal to

 $5\left(h\ +4\right)\ -7$  (6.EE.A.4)

• 5h + 23

• 5h -27

• 5h + 20

• 5h + 13

The number h decreased by eight

• h-8
• 8h
• h+8
• 8-h

What is the coefficient of the following expression? 
7c + 8

• c
• 7
• 8
• 1

a number increased by 9

• n + 9
• n - 9
• 9n
• n/9