Unit 2A Review: Simplifying Expressions

Unit 2A Review: Simplifying Expressions

by Yushan Wang

​Simplifying Expressions - Combining like terms

​Add or subtract the terms with the same variable

​Simply expression

​7 - 3 + 8.9 => 12.9

3a + 2 a => 5a

​1.5g +6.5g => 8g

Multiple Choice

  $$5\ \frac{1}{2}+2\ \frac{3}{4}\ -\frac{1}{4}$$    

• $$8\ \frac{1}{2}$$  

• 8

• $$8\ \frac{1}{4}$$  

Multiple Choice

2f + f

• 3f
• 2f
• f

Multiple Choice

5a + 2a + 2a 

• 9a
• 8a
• 7a

Multiple Choice

3.5b + b - 2b 

• 3b
• 0.5b

• 2.5b

Multiple Choice

Simplify the expression: -2x + 1 + 7x 

• 5x

• 6

• 5x + 1

• 5 + 1x

Multiple Choice

Simplify the expression: -6v + 2 - 12 + 2v

• 12

• 12v

• 10 + 8v

• -4v - 10

Multiple Choice

6x + 2.3x + 1.5 + 4.3

• 8.3x + 5.8 

• 2.3x - 3.8

• 4.8x - 2.3

• 8.3x + 3.8 

Multiple Choice

(4x -9)

• -4x-9

• 4x+9

• 4x-9

• -4x+9

Multiple Choice

• -24x+36
• 24x+36
• -24x+32
• 24x-32

Multiple Choice

(-9 + 6x)

• -9-6x

• -9+6x

• 6x+9

• -6x+9

Multiple Choice

-(8r + 3)

• -8r - 3

• 8r - 3

• -8r + 3

• 8r + 3

Multiple Choice

2(x + 3)

• 2x - 3

• 2x + 3

• 2x+6

• x + 6

Multiple Choice

• 50x+25
• -50x-25
• -50x+25
• 50x-5

Multiple Choice

(3x-5)-(2x+6)

• 5x+11

• x-1

• x-11

• x+11

Multiple Choice

(-2+4x)+(2x+6)

• 4x+6

• 4x+10

• 6x+4

• 10

Multiple Choice

-5(n+4)+5n

• -5n-20+5n

• -20

• -5n + 4 +5n

• -5n +20 +20n

​(1.8k - 5) + (3.5 + 6.1k) + (k + 1.5)

Step 1: Remove parentheses with distribution

​1.8k - 5 + 3.5 + 6.1k + k + 1.5

​Step 2: Combining like terms

(1.8+6.1+1)k + (-5+3.5+1.5)

​=> 8.9k

Multiple Choice

A rectangle has a length of 2m and a width of 0.5m-3. Which of the

following expression represents the PERIMETER of the rectangle?

• 4x+6

• 4x+10

• 6x+4

• 10

Multiple Choice

Solve the following equation
X + 8 = 15

• 23
• -7
• 7
• -23

Multiple Choice

Solve the following equation 
8 = m - 12

• 4
• 0.5
• 5.0
• 20

Multiple Choice

Solve for x:

• x = 20
• x = 7
• x = 10
• x = 3

Multiple Choice

What are vertical angles?

• Angles that are adjacent to each other
• Angles that add up to 180°
• Angles that are opposite of each other when lines intersect
• Angles that add up to 90°

Multiple Choice

∠1 and ∠3 can best be described as -

• complementary angles
• supplementary angles
• vertical angles
• adjacent angles

Multiple Choice

Simplify the following expression:
x + 4 - 7(x - 5)

• -33x + 19
• -47x² +  21
• 33x - 19
• -6x + 39

Multiple Choice

If m∠1 = 30°, then m∠3 = 

• 30°
• 60°
• 150°
• undetermined

Multiple Choice

The angle relationship shown is -

• complementary angles
• supplementary angles
• vertical angles
• angle bisector

Multiple Choice

Two angles added together to equal 90 degrees is:

• Supplementary

• Complementary

• Right

• Vertical

Multiple Choice

These angles are...

• Complementary
• Supplementary
• Neither

Multiple Choice

Supplementary Angles measure _____ degrees.

• 180
• 55
• 100
• 90

Multiple Choice

What is the measure of the missing angle?

• 92
• 102
• 82
• 72