Homework 4.2

Solve the system by elimination.

3x + y = 19

2x - y = 6

• (5, 14)

• (4, 5)

• (5, 4)

• (14, 5)

Solve the system by elimination. Hint: What will you use as a multiplier and on which equation?

x + 6y = 17

x - 3y = 8

• (5, 2)

• (11, 1)

• (1, 11)

• no solution

What would be the first step in finding the solution using elimination?

2x + 2y = -2

3x - 2y = 12

• you cannot solve this using elimination

• cross out the 2x and 3x

• Add the like terms. The y terms will zero out.

• change to slope intercept form and graph

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve the system. You could use elimination OR substitution.

4x + 5y = 5

x = -10y + 3

• ( 1 , 5 )

• ( 0.2 , 1 )

• No Solution

• ( 1 , 1/5 )

What is the variable that willl be "eliminated"?

5x - 4y = 11

5x + 4y = -14

• x variable

• y variables

• both variables

Which graph represents a system of equations with infinite solutions?

• 
• 
• 
• None of the above

Tags

CCSS.8.EE.C.8A

Write the equation of the line.

• y=-3x-4
• y=-4x-3
• y=(-3/4)x-3
• y=(-4/3)x-3

Tags

CCSS.HSA.CED.A.2

CCSS.HSA.REI.D.10

What is Brad's slope in terms of sit-ups?

• 1 sit-up per day
• 5 sit-ups per day
• 15 sit-ups per day
• 15 days per 1 sit-up

Tags

CCSS.HSF.LE.B.5

What is the y-intercept of the line graphed below?

• 3
• 4
• -3
• 4/3

Tags

CCSS.HSA.CED.A.2

CCSS.HSA.REI.D.10

CCSS.HSS.ID.C.7