Unit 6 Expressions and Equations

Select all the equations where y = 6 is a solution.

• 6y = 36

• $\frac{18}{y}=\ 3$

• 2 ( y + 3) = 15

Select all the expressions that are equivalent to 24x- 12y.

• 12 (12x - y)

• 12 (2x - y)

• 12 ( 2x + y)

• 2 (22x - 10y)

• 2 (12x - 6y)

Select all the equations represented by this tape diagram.

• 3+3+3+3=?

• ?=4⋅3

• ?=3⋅3⋅3⋅3

• 4÷3=?

• 4=?÷3

3/10 of the students in band play brass.

If there are b students in band, write an expression for the  number of sixth graders in brass in terms of b.

Of, relating to, or designating algebra. 2. Designating an expression, equation, or function in which only numbers, letters, and arithmetic operations are contained or used.

• Slope

• Parallel Lines

• No solution

• Algebraically

The equation for the table below is y=2x+5, fill in the missing values.

c

d

e

f

4

3

-1

7

0

9

The table shows Sandra's weekly earnings, y , based on the number of hours she works. Which equation can Sandra use to calculate her weekly earnings when she works x hours?

• y = 8x

• y = 5x + 40

• y = 10x

• y = 10x + 80

The table shows Sandra's weekly earnings, y , based on the number of hours she works. Which equation can Sandra use to calculate her weekly earnings when she works x hours?

​ (a)  

• y = 8x

• y = 5x + 40

• y = 10x

• y = 10x + 80

Lin got a $50 gift card to an online music store. She uses the gift card to buy an album for $9.99. She also wants to use the gift card to buy some songs. Each song costs $1.29. Which of these inequalities describes this situation, where n is the number of songs Lin wants to buy?

• 9.99+1.29n≥50

• 9.99+1.29n≤50

• 9.99−1.29n≥50

• 9.99−1.29n≤50

Which number line shows all the values of x that makes the inequality true?

• a

• b

• c

• d