The table below shows the cost for a popular cruise. There is a booking fee plus a cost per day. Help Video

Number of Days Cost ($)
4 675
5 800
6 925


(2 points)
The cost per day is $

The booking fee is $

Skip to navigation

1 answer

To find the cost per day and the booking fee, we can set up a system of equations based on the information provided in the table.

Let:

  • \( b \) be the booking fee.
  • \( c \) be the cost per day.

The cost for each number of days can be expressed using the formula: \[ \text{Cost} = b + c \times \text{Number of Days} \]

From the data given:

  1. For 4 days: \[ 675 = b + 4c \]
  2. For 5 days: \[ 800 = b + 5c \]
  3. For 6 days: \[ 925 = b + 6c \]

Now, we can create a system of equations:

  1. \( b + 4c = 675 \) (Equation 1)

  2. \( b + 5c = 800 \) (Equation 2)

  3. \( b + 6c = 925 \) (Equation 3)

We can solve this by eliminating \( b \).

Subtract Equation 1 from Equation 2: \[ (b + 5c) - (b + 4c) = 800 - 675 \ c = 125 \]

Now we have \( c \).

Next, we'll use the value of \( c \) to find \( b \). We'll substitute \( c = 125 \) back into Equation 1:

\[ b + 4(125) = 675 \ b + 500 = 675 \ b = 675 - 500 \ b = 175 \]

Thus, the solutions are:

  • The cost per day is \( c = 125 \) dollars.
  • The booking fee is \( b = 175 \) dollars.

Final Answers:

  • The cost per day is $125.
  • The booking fee is $175.