Unit 3 Test Review

Abraham has two jobs. He walks dogs for $20 per hour and works at Chick-fil-A for $10 per hour. He is only able to work 18 hours per week, but he needs to make at least $250 per week. Which system of inequalities would model the situation above?

• $20d+10c\ge250$
  

  $d+c\le18$
  

• $20d+10c<18$
  $d+c\ge250$

• $20d+10c>250$
  $d+c=18$

True or False: Does the following graph represent the system of inequalities below?

 $x+y<2$ 
  $y\le-2$  

• True

• False

Which system of inequalities matches the following graph?

• $y\le2x-2$
  $y>2x+6$
  

• $$y\; <2x+6$$
  $y\le2x-2$
  

• $y<2x-2$
  $y>2x+6$
  

Give the solution of the following system as an ordered pair

 $y+x+3=0$  
 $y-2=-6x$  

• (1,-4)

• (-4,1)

• (-4,-1)

• (4,-3)

Give the solution to the following system of equations
 $-9x+12y=-15$  

 $8x+6y=30$  

• (3,1)

• (1,-6)

• No Solution

• (1,3)

• Infinite number of solutions