Review for Unit 1 PC #2

Which equation describes Josh's Car Trip?

• y = 160x + 40

• y = -160x + 40

• y = -40x + 160

• y = 40x - 160

The price of meat tripled, and then rose another $0.50 per pound. If the price is now AT MOST $5.25 per pound, which inequality expresses this situation?

• $3x+0.50\le5.25$

• $3x+0.50\ge5.25$

• $3x\cdot0.50\ \le5.25$

• $3\left(x+0.50\right)\ge5.25$

Samantha pays a $40 fee to own a cell phone. She also has to pay $0.10 per minute of cell phone usage. Which function f(x) models the relationship between the number of minutes, x, and the total cost f(x) of Samantha's phone bill?

• f(x) = 40x + 0.10

• f(x) = 0.10x - 40

• f(x) = 40x - 0.10

• f(x) = 0.10x + 40

Which equation represents the graph below?

• y = 500 + 100x

• y = 500 - 100x

• y = 5x + 500

• y = -2x + 500

Ryan is a wrestler trying to make weight. He currently weighs 300 lbs. He loses 2 lbs per week. Which function f(x) models the relationship between the number of weeks, x, and how much Ryan weighs, f(x)?

• f(x) = 300 + 2x

• f(x) = 300x + 2

• f(x) = 300 - 2x

• f(x) = 300x - 2

Your favorite store sells gloves and hats. The store profits $8.00 from each pair of gloves and $10.00 for each hat sold. The store needs to make an average profit of $300 per hour to stay in business. Using x as the number of pairs of gloves and y as the number of hats sold, write and graph an inequality for the number of each item the store needs to sell to stay in business. If 15 pairs of gloves were sold, how many hats must be sold?

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Which situation is represented by the inequality  $150+30x\le3000$ ?

• Kathy wants to hire a caterer for her wedding. Suppose she can spend at most $3000. The caterer charges $30 plus $150 per guest. What is x, the minimum number of guests she can invite?

• Kathy wants to hire a caterer for her wedding. Suppose she can spend at most $3000. The caterer charges $30 plus $150 per guest. What is x, the maximum number of guests she can invite?

• Kathy wants to hire a caterer for her wedding. Suppose she can spend at most $3000. The caterer charges $150 plus $30 per guest. What is x, the minimum number of guests she can invite?

• Kathy wants to hire a caterer for her wedding. Suppose she can spend at most $3000. The caterer charges $150 plus $30 per guest. What is x, the maximum number of guests she can invite?

Jack has a business mowing lawns and charges a flat fee of $20, plus an additional $5 an hour. Which function f(x) models the relationship between the number of hours, x, and the total profit f(x) that Jack will earn?

• f(x) = 5x + 20

• f(x) = 20x + 5

• f(x) = 20x - 5

• f(x) = 5x - 20

Which situation is represented by the inequality  $16x+100\ge800$  ?

• Charles wants to buy a computer. He needs to save at least $800.  He already saved $16 and earns $100 per hour as a lifeguard. What is x, the maximum number of hours he can work?

• Charles wants to buy a computer. He needs to save at least $800.  He already saved $100 and earns $16 per hour as a lifeguard. What is x, the minimum number of hours he can work?

•  Charles wants to buy a computer. He needs to save at least $800.  He already saved $100 and earns $16 per hour as a lifeguard. What is x, the maximum number of hours he can work?

• Charles wants to buy a computer. He needs to save at least $800.  He already saved $16 and earns $100 per hour as a lifeguard. What is x, the minimum number of hours he can work?