Evaluating and Creating Expressions

The product of 7 and j increased by 3 is shown in which expression?

• 3+7j

• 7j-3

• 7(j+3)

• 3j+7

Tags

CCSS.6.EE.A.2A

Evaluate 3x + 8   if x = 2

• 13
• 14
• 15
• 16

Tags

CCSS.6.EE.A.2C

Evaluate when x = 8:
2x + x - 10

• 34
• 22
• 14
• 24

Tags

CCSS.6.EE.A.2C

Evaluate the expression when x = 3. 
2x² - 5

• 31
• 12
• 7
• 13

Tags

CCSS.6.EE.A.2C

Evaluate the expression when x = 8:  
7(6 + 3 − x)

• 72
• 56
• 21
• 7

Tags

CCSS.6.EE.A.2C

Evaluate the following expression

x² -2(x+5)

x=10

• 10

• 70

• 85

• 90

Tags

CCSS.6.EE.A.2C

Evaluate 5x + 4y if x=3 and y=2

• 54

• 22

• 95

• 23

Tags

CCSS.6.EE.A.2C

What is an algebraic expression?

• a letter or a symbol used to represent an unknown value

• an expression that contains one or more variables and may also contain an operation symbol such as + or -

• a specific number whose values does not change

Ava was asked to find the value of the expression

13t-8r^2 when t=-10 and r=-2. Her work is shown below, but she made a mistake. Which step is incorrect?

1.) 13t-8r^2

2.) 13(-10)-8(-2)^2

3.) 13(-10)-8(4)

4.) -130-8(4)

5.) -138(4)

6.) -552

• 13(-10)-8(-2)^2

• 13(-10)-8(-2)^2

• 13(-10)-8(4)

• -130-8(4)

• -138(4)

Which of the following situations could be represented by the expression, x(x+7)?

• The volume of a rectangular prism that has a length 7 inches longer than its height. Its height and width are the same length.

• The volume of a rectangle that has a width 7 inches longer than its length.

• The volume of a rectangle that has a length 7 times its width.

• The volume of a rectangular prism that has a length seven times longer than its height. Its height and width are the same length.