A1 Unit 4 Summative Review

Plumber A charges $60 an hour. Plumber B charges $40 to visit your home plus $55 for each hour. Select the correct system of linear equations that model the problem.

• 
  

  $y=60x$

  $y=55x+40$
  

• $y=40x$
  $y=60x+55$
  

Tags

linear system

How many solutions will this system have? 

• No solution
• One Solution
• I Don't Know
• Infinitely Many Solutions

The graph represents a system of linear equations. How many solution(s) does the system have?

• two
• one
• No solutions
• Infinite solutions

What is the solution to this system of equations?

• (4, -1)
• (-1, 4)
• (-4, 1)
• (-4, -1)

This system has _____ solutions

• 0
• 1
• 2
• Infinitely many

Slopes of parallel lines are...

• opposite reciprocals.
• opposites.
• the same.
• always 7.

Which of the following lines goes through the point (0, 4) and is parallel to y = 5x - 3?

• y = 1/5x - 3
• y= 5x - 7
• y = 5x + 4
• y = -5x - 3

What slope is perpendicular to:  
m = 5/8

• -5/8
• 5/8
• -8/5
• 8/5

Write the equation of a line PERPENDICULAR to the line y = 3x + 2 that passes through the point (9, -2)

• y = -1/3x - 5

• y = 3x-29

• y = 1/3x -5

• y = -1/3x +1

Solve the following system of equations using any method. Which of the following is the solution to the system?

Tags

linear system