Unit 3 Review

Solve for x:
5x - 14 = 8x + 4

• x = 6
• x = -6
• x = -18/13
• x = 10/3

A local bakery has a daily operating cost of $1800 plus a cost of $10 per cake they make. If a cake sells for $15, which equation could be used to determine the minimum number of cakes, c, they must sell each day to earn a profit?

• 15c < 1800 + 10c

• 15c > 1800 + 10c

• 15c = 1800 + 10c

• 10c < 1800 + 15c

David

invests $10,000 in a savings account that pays 3.5% simple interest. If David

makes no withdrawals or deposits to the account, how much will be in the

account after 7 years.

• $2,450

• $11,750

• $12,450

• Not here

8w - 8 = - 4x + 16

• 8
• 16
• 24
• 2

Sara is ordering t-shirts for her school. Sally's Shirt Shop charges $8.50 for each shirt and a one-time set up fee of $60. Shaun's Shirt Shack charges $11 for each shirt and a one-time set up fee of $24. Which inequality can be used to find x, the minimum number of shirts that can be ordered so that the total charge at Sally's Shirt Shop is less than the total charge at Shaun's Shirt Shack?

• 8.50x + 11 < 24x + 60

• 8.50x + 24 < 11x + 60

• 11x + 24 < 8.50x + 60

• 8.50x + 60 < 11x + 24

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

• x = 7
• x = -7
• x = 2/7
• x = 11

Roxy and Randy are selling pancake breakfast plates to raise money for a class trip. Roxy is selling plates for $5.00 and has already raised $175. Randy is selling plates for $3.50 and has already raised $250. Which equation can be used to find p, the number of plates that Roxy and Randy must sell so that the total amount raised is the same for both Roxy and Randy?

• 5p + 250 = 3.50p + 175

• 250p + 3.50 = 175p + 5

• 3.50p + 250 = 5p + 175

• Not here

Cody’s Gym charges a $15 fee to join and $30 per month. Tyler’s Gym charges a $30 fee to join and $20 per month. Write an inequality that could be used to determine after how many months Tyler’s gym would be a better deal.

• 30 + 20x < 15 + 30x
• 30x + 20 < 15x + 30
• 30 + 20x > 15 + 30x
• 30x + 20 > 15x + 30

Peppy Pets charges a flat fee of $15 plus $3 per hour to keep a dog during the day. Happy Hounds charges a flat fee of $21 plus $1 per hour. For how many hours is the total fee charged by the companies the same?

• 2 hours
• 3 hours
• 4 hours
• 5 hours

Zoe needs to rent a car. Kara's Kar Kompany charges $22 per day and a $100 cleaning fee. Callie's Car Company charges $26 per day and has a $40 cleaning fee. After how many days would the rental cost be the same for both car rental companies?

• 8 Days

• 13 Days

• 15 Days

• 18 Days