Question 1

The graphing calculator screens show a system and the point of intersection. Choose the screen which best represents the given system.
-Y = 2.5
X + y = 5

Accepted Answer

A)   
B)   
C)   
D)

Question 2

GraphSolve the system by substitution.
-X - 2y = 18
2x - y = 0

Accepted Answer

A)  {( -6, -13)} 
B)  {( -7, -14)} 
C)  {( 6, 12)} 
D)  {( -6, -12)}

Question 3

Solve the system by graphing.
-2x + y = 0
Y = 3x + 5

Accepted Answer

A)  {( -2, -1)} 
B)  {( 2, -4)} 
C)  {( -1, 2)} 
D)  {( 2, -1)}

Question 4

Write a system of equations for the problem, and then solve the system.
-A biologist collected 223 fern and moss samples. There were 155 fewer ferns than moss samples. How many fern and moss samples did the biologist collect?

Accepted Answer

A)  Fern samples: 34; moss samples: 189 
B)  Fern samples: 189; moss samples: 68 
C)  Fern samples: 189; moss samples: 34 
D)  Fern samples: 172; moss samples: 34

Question 5

Solve the system by graphing.
-4x + y = 16
16x + 4y = 64

Accepted Answer

A)  {(5, -4)} 
B)  {(0, 16)} 
C)  {(x, y)| 4x + y = 16} 
D)

Question 6

Decide if the graph of the system is a pair of parallel lines, intersecting lines, or one line.
-x + y = -1
X - y = 7

Accepted Answer

A)  One Line 
B)  Parallel 
C)  Intersecting

Exam 5: Exponents and Polynomials

The graphing calculator screens show a system and the point of intersection. Choose the screen which best represents the given system. -Y = 2.5 X + y = 5

GraphSolve the system by substitution. -X - 2y = 18 2x - y = 0

Solve the system by graphing. -2x + y = 0 Y = 3x + 5

Write a system of equations for the problem, and then solve the system. -A biologist collected 223 fern and moss samples. There were 155 fewer ferns than moss samples. How many fern and moss samples did the biologist collect?

Solve the system by graphing. -4x + y = 16 16x + 4y = 64

Decide if the graph of the system is a pair of parallel lines, intersecting lines, or one line. -x + y = -1 X - y = 7