WU: Jan 22

What is the first step in solving a system by Substitution?

• Make sure both equations are in standard form.
• Make sure at least one equation is solved for one variable.
• Make sure both equations are in slope-intercept form.
• Make sure both equations can be solved.

Tags

TEKS.MATH.A.5C

y = -2x + 18
y = 8

• (5, 8)
• (-5, 8)
• (2, 8)
• (-2, 8)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

If a system of equations has no solution, what does the graph look like? 

• intersecting lines
• parallel lines
• skew lines
• intersecting lines

Tags

CCSS.8.EE.C.8A

Simplify 3(1 - 2x) + 7

• 21 - 6x
• 24 + 6x
• 10 + 6x
• 10 - 6x

Tags

CCSS.6.EE.A.3

Solve for y: 
4x + 3y = 9

• y = -3/4x + 3
• y = -4x + 9
• y = -4/3x + 3
• 3y = -4x + 9

Tags

CCSS.6.EE.C.9

If a system of linear equations has infinitely many solutions, what does this mean about the two lines? 

• Intersecting lines
• Identical line
• Parallel lines

Tags

CCSS.8.EE.C.8A

x - 3y = -13
4x + 2y = 4

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

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6