Unit 3 Review 1

Lisa has a coupon for 30% off any purchase at Best Buy. If the item she buys costs  $x$   dollars, then the amount she will be charged is represented by this expression:
 $x\ -\ .3x$  
Which if the following is equivalent to that expression?

•  $-0.3x$  

•  $1.7x$  

•  $1.3x$  

•  $.7x$  

Lisa has a coupon for 45% off any purchase at Best Buy. If the item she buys costs  $x$   dollars, then the amount she will be charged is represented by this expression:
 $x\ -\ .45x$  
Which if the following is equivalent to that expression?

•  $-0.45x$  

•  $1.45x$  

•  $1.55x$  

•  $.55x$  

Simplify by combining like terms:
5a + 2b - 3a + 4

• 8a + 2b + 4
• 2a + 2b + 4
• 8ab
• 4ab + 4

Tags

CCSS.7.EE.A.1

Simplify  
6(x + -2)

• 6x + -2
• 6x + -12
• 4x
• 6x - 2

Tags

CCSS.6.EE.A.3

 $-3x^2\ +\ 8x\ +\ 2\ +\ x^3\ -\ x^2\ -\ 8$ 
Simplify

•  $-4x^2\ +\ x^3\ +\ 8x\ -\ 6$  

•  $4x^{2\ }+\ x^{3\ }+\ 8x\ -6$  

•  $4x^{4\ }-\ 8x\ -6$  

• This is simplified already

 $-3x^2\ +\ 8x\ +\ 2\ +\ x^3+\ x^2\ -\ 10$ 
Simplify

•  $-2x^2\ +\ x^3\ +\ 8x\ -\ 8$  

•  $-3x^{2\ }+\ x^{3\ }+\ 8x\ -10$  

•  $-2x^{2\ }-\ 8x\ -10$  

• This is simplified already

The number of customers at JJ's Hair Salon decreased 12% in January. Which expression shows this decrease using the variable j to represent the customers.

• $j\ -\ .12j$

• $.12j$

• $1\ +\ .12j$

• $1j\ -\ 12j$

The number of customers at JJ's Hair Salon decreased 17% in January. Which expression shows this decrease using the variable j to represent the customers.

•  $j\ -\ .17j$ 

•  $.17j$ 

•  $1\ +\ .17j$ 

•  $1j\ -\ 17j$ 

Simplify the expression:

• 5y - 10

• y - 16

• 4y + 8

• y - 8

Tags

CCSS.6.EE.A.3

3.2x + 4.7y + 3.9x -1.2x

• 4.7y + 8.3x

• 5.9x + 4.7y

• 10.6xy

• -10.6xy