Unit 3 review 3

Peppy Pets charges a flat fee of $25 plus $2.75 per hour to keep a dog during the day. Happy Hounds charges a flat fee of $30 plus $0.75 per hour. For how many hours is the total fee charged by the companies the same?

• 0.4 hours

• 2.5 hours

• 7 hours

• -2.5 hours

Tags

CCSS.8.EE.C.8C

Which of the following scenarios best represents the following inequality?
30 + 4x  $>$  70 + 2x 

• There are two limo companies that charge based on the number of people, x, that they carry.  Limo A charges $30 plus $4 per person.  Limo B charges $70 plus $2 per person.  Write an inequality showing when Limo B will be a better deal.

• Company A charges a one time installation fee of $30 and $4 per month.  Company B charges a one time installation fee of $70 and the $2 per month.  After how many months will will you save money by using Company A? 

• Company A charges a one time installation fee of $30 and $4 per month.  Company B charges a one time installation fee of $2 and the $70 per month.  After how many months will will you save money by using Company A? 

• Company A charges a one time installation fee of $4 and $30 per month.  Company B charges a one time installation fee of $70 and the $2 per month.  After how many months will will you save money by using Company B? 

Which situation can be represented by 15x + 8 = 10x

• John went to two different carnivals. The first carnival charged $15 per hour and gave a 8% discount with a coupon. The second carnival charged $10 per hour. What is the number of hours that John can stay at each carnival to have to pay the same amount?

• John was training for a bike race. On the first day her traveled 8 miles per hour and started 15 miles from his house. On the second day he started from his house and rode 10 miles per hour. What is the number of hours that John would have to ride his bicycle to travel the same distance on both days?

• John and Jennifer were playing a video game. John scored started the game with 8 points and scored 15 points per minute. Jennifer started the game with no points and scored 10 points per minute. After how many minutes would they each have the same score?

• John payed $8 for each pizza and a $15 delivery fee. Jennifer paid $10 for each pizza and had no delivery fee. How many pizzas can each of them order using the same amount of money?

Is this table a function or not a function?

• Function because each input has on output

• Not a Function because each input has more than one output

• Not a function because there is a -2 and a positive 2

• Function because each input has more than one output

Tags

CCSS.8.F.A.1

Which set of coordinates does not describe y as a function of x?

• (2, 4), (-2, 4), (2, 5), (3, 6)

• (1, 3), (2, 3), (3, 5), (4, 4)

• (-1, 6), (3, -4), (9, -7) , (6, 5)

• (2, 2) (1, 1), (3, 3), (4, 4)

Tags

CCSS.8.F.A.1

Which graph does NOT represent y as a function of x?

• 
• 
• 
• 

solve the equation

• 13

• 42

• -42

• 8

solve the equation

• 35

• 15

• -120

• 120

Solve the equation:
7x - 4 = 3 + 8x

• x = 7
• x = -7
• x = 2/7
• x = 11

2x = x + 3

• 6
• 3
• 2
• x