Oct 9 Spiral Review

Jasmine makes candles using different scents. She sells each candle for $5.  The function 

 f(x) = 5x represents the scenario.   

What does the variable x represent? 

• Output

  The cost of each candle 

• Input

  The number of scents 

• Input

  The number of candles sold 

• Output

  The total cost 

A shipping company charges a cost per pound plus a fixed fee to ship a package.  The total cost, f(x) in dollars, of shipping x pounds is modeled by the function f(x) = 5.3x + 1.4 

Which statement is true? 

• The coefficient is 1.4 and represents the fixed fee to ship the package. The constant is 5.3 and represents the cost per pound. 

• The coefficient is 5.3 and represents the cost per pound.  The constant is 1.4 and represents the fixed fee to ship the package. 

Solve for x

• x > -3/2

• x < 3/2

• x >_ -3/2

• x >_ 3/2

What is the formula in terms of s? 

Which best describes the behavior of the function f(x) = -2x – 6?

• Slope increases by 2

• Slope decreases by 2

• Slope increases by 6

• Slope decreases by 6

Does the equation have infinitely many solutions or no solution?

18x + 4 + 2x = 4(5x - 1) 

• Infinite Solutions

• No Solution

• One Solution

• Not enough information

– (6x + 2) – 5(– x – 1)  =  – x + 3  

• Infinite Solutions

• No Solutions

• One Solution

• Not enough information

Suppose the relationship between daily low temperature x, in Celsius, and daily sales at a frozen yogurt shop, y, can be modeled by the equation y = 1100 + 35x. Which statements about the relationship between temperature and sales are true? 

Select two correct answers

• If the low temperature increases by 1 degree, then sales are expected to increase by $35. 

• If the low temperature increases by 1 degree, then sales are expected to increase by $1,100. 

• If the low temperature is 0 degrees, then sales are expected to be $1,100

• If the low temperature is 0 degrees, then sales are expected to be $35 

Tanika booked a banquet hall for a party. The hall charged $15 per person, with a required tip of $60 for the waiters. Tanika knows that the total bill was $315, but she lost track of how many people attended. She writes and solves an equation, where p represents the number of people who attended. 

Which operation describes Tanika’s missing work in Step 2?

• added 60 to both sides 

• multiplied both sides by 15 

• divided both sides by 15 

• subtracted 60 from both sides

The sale price of a jacket is represented by the expression 𝑥 − 0.2𝑥. 

 

Which statement about the expression is true. 

• The sales price is 20% less than the original price.

• The original price of the jacket is x

• The sale price is 20% of the original price.

• The amount of the discount is represented by 0.2x