Test Review: Combine like terms/Distribute/Rational V Irrational

Simplify the following expression:

9x + 5(x + 3)

• 9x + 15

• 45x + 27

• 14x + 42

• 14x + 15

Which of the terms could be combined in the following expression:

3x + 7 - 9x + 24y + 2x²

• 7, 24y

• 3x, 9x

• 3x, -9x

• 3x, -9x, 2x²

Which number is a rational number ?

• 1/4
• π
• √3
• ∛25

.141414141414...

• Rational 
• Irrational 

Which of these contains a constant?

• 56t

• 4r - s

• 12e + 7

What are coefficients?

• The letters in an expression
• The numbers without a letter
• The same as constants
• The number before a letter 

Combine like terms: n -10 + 9n - 3=

• 9n - 7

• 10n - 7

• 9n - 13

• 10n -13

Simplify:
3(9 + 2d) + 4d 

• 18d+10d
• 18d-10d
• 27+10d
• 37d

√3  

• rational
• irrational

A variable can be _______?

• Any number

• Any letter of the alphabet

• only X

• only 1