Elimination Method

Find x and y using the elimination method
2x+3y=7
2x+7y=11

• x=-2, y=-1
• x=2, y=-1
• x=2, y=1
• x=-2, y=1

Solve 
4x+ 9y = 28
-4x -y = -28

• (-7,0)
• (6,0)
• (-6,0)
• (7,0)

Tags

CCSS.HSA.REI.C.5

CCSS.HSA.REI.C.6

Solve
−6x + 6y = 6
−6x + 3y = −12

• (5, 6) 
• (6,5)
• (2,4)
• (4,2)

-4x -2y = -12
4x +8y = -24

• (5,6)
• (6,-6)
• (6,-2)
• (4,-3)

Solve 
 x  -   y  =  11
2x +  y  = 19

• (10,-1)
• (-1,10)
• (3,-4)
• (6,7)

Tags

CCSS.HSA.REI.C.6

A babysitter earns $8 an hour for babysitting 2 children and an additional $3 tip when both children are put to bed on time.  If the babysitter gets the children to bed on time, what expression could be used to determine how much the babysitter earned?

• 8x+3 where x is the number of hours
• 3x+8 where x is the number of hours
• x(8+2) + 3 where x is the number of children
• 3x+(8+2) where x is the number of children

A high school basketball team won exactly 65 percent of the games it played during last season. Which of the following could be the total number of games the team played last season? 

• 22
• 20
• 18
• 14

Tags

CCSS.6.RP.A.3C

Which ordered pair (x,y) satisfies the system of equations shown below?
2x - y = 6
x + 2y = -2 

• (-6, 2)
• (-2, 2) 
• (2, -2) 
• (4, 2) 

Tags

CCSS.HSA.REI.C.5

CCSS.HSA.REI.C.6

Tyra subscribes to an online gaming service that charges a monthly fee of $5.00 and $0.25 per hour for time spent playing premium games. Which of the following functions gives Tyra's cost, in dollars, for a month in which she spends x hours playing premium games? 

• C(x) = 5.25x
• C(x) = 5x + 0.25
• C(x) = 5 + 0.25x
• C(x) = 5 + 25x

Tags

CCSS.HSA.CED.A.1

CCSS.HSA.SSE.A.1

CCSS.HSF.BF.A.1

CCSS.HSF.IF.A.1

CCSS.HSF.IF.A.2

CCSS.HSF.LE.A.1

CCSS.HSF.LE.A.2

• A
• B
• C
• D

Tags

CCSS.HSN.CN.A.1

CCSS.HSN.CN.A.2