Chapter 4 Systems of Linear Equations

Solve the system by substitution.
 
5x + 4y= −14
y =  −7x  −  15 

• (-2, -1)
• (1, -2)
• (-2, 1)
• (-1, -2)

What is the solution to the system?

• (0, 3)
• (1, -1)
• (-3, 1)
• (1, 3)

Solve the following system by using elimination:

-2x - 5y = -15

x + 8y = 13

• (5, 1)

• (1, 5)

• (5, -1)

What is the solution?

• (2, 2)
• (3, 2)
• (3, 4)
• (2, 3)

Solve:
x = -3y - 17
2x + 3y = -7

• (1, -20)
• (3, 0)
• (-5, -2)
• (10 , -9)

Solve using elimination. 
 4x + 8y = 20
-4x + 2y = -30

• (-7,1)
• (2,-5)
• (-2,5)
• (7,-1)

Which choice shows substitution correctly?

y = 2x + 3

3x + 2y = 20

• 3x + (2x + 3) = 20

• 3x + 2y(2x + 3) = 20

• 3x + 2 (2x + 3) = 20

• y + 2x + 3 = 20

Solve the system of equations using substitution:
3x - y = -8
x = -2

• (2, 2)
• (-2, -14)
• (-2, 2)
• (2, 14)

What is the point of intersection?

• (1, -1)

• (0, -2)

• (-1, 1)

• (2, 0)

• (-3, 16)

• (-3, -16)

• (-4, 15)

• (-4, -15)