Solving pairs of linear equations in two variables

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve:

x = -3y - 17

2x + 3y = -7

• (1 , -2)

• (3 , 0)

• (-5 , -2)

• (10 , -9)

• (10 , 2)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Consider the system:

4x+3y=-1

5x+4y=1

Since we now know that x=-7, solve for y:

4(​ (a)   )+3y=-1

​ (b)   +3y=-1

​ (c)   =​ (d)  

y=​ (e)  

• -7
• -28
• 3y
• 27
• 9
• 5
• 7
• -12
• 3
• y

Tags

CCSS.HSA.REI.C.9

For:
 $2x+3y-2z=-1$  
 $x+5y=9$  
 $4z-5x=4$  
What is the x value?

• 1

• 4

• 0

• 10

Tags

CCSS.HSA.REI.C.6

Solve the system:
2x - 5y = 12
y = -2

• y = -2
• (11, -2)
• (1, -2)
• no solution

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

What is a possible solution to the system of equations?

• (0, 0)

• (-5, 5)

• (10, 5)

• (2, 10)

Tags

CCSS.HSA.REI.D.12

What is the answer to the following system of equations?

X + Y = 20

X - Y = 10

write your answer as two numbers in parentheses separated by comma with no spaces

Tags

CCSS.HSA.REI.C.9

For the system below, x = 7. Find the value for y.

4x + 8y = 20

4x - 2y = 30

• y = 4

• y = -3

• y = -1

• y = 2

Tags

CCSS.HSA.REI.C.9

Which method can NOT be used to solve a system of equations?

• substitution
• Cramer's rule
• inverse matrices
• determinants

Tags

CCSS.HSA.REI.C.9

Solve the system using inverse matrices.

-5x + 5y = -10

-7x + 4y = 13

• (-7, -5)

• (-7, -9)

• (7, -9)

• (-7, 5)

Tags

CCSS.HSA.REI.C.9