Hugh bought some magazines that cost [tex]$\$[/tex]3.95[tex]$ each and some books that cost $[/tex]\[tex]$8.95$[/tex] each. He spent a total of [tex]$\$[/tex]47.65[tex]$. Let $[/tex]m[tex]$ represent the number of magazines and $[/tex]b[tex]$ represent the number of books. Which equation models the situation?

A. $[/tex]m + b = 47.95[tex]$
B. $[/tex]m + b = 60.55[tex]$
C. $[/tex]3.95m + 8.95b = 47.65[tex]$
D. $[/tex]8.95m + 3.95b = 47.65$



Answer :

Let's go through the problem step by step to determine the correct equation that models the given situation.

1. First, identify the variables and their respective costs from the problem:
- Let [tex]\( m \)[/tex] represent the number of magazines.
- Each magazine costs \[tex]$3.95. - Let \( b \) represent the number of books. - Each book costs \$[/tex]8.95.

2. Next, understand the total expenditure mentioned in the problem:
- Hugh spent a total of \$47.65.

3. To form an equation, we need to represent the total cost in terms of the number of magazines ([tex]\( m \)[/tex]) and books ([tex]\( b \)[/tex]).
- The cost of [tex]\( m \)[/tex] magazines is [tex]\( 3.95m \)[/tex].
- The cost of [tex]\( b \)[/tex] books is [tex]\( 8.95b \)[/tex].

4. Since the total expenditure is the sum of the cost of the magazines and the books, we can write the equation as:
[tex]\[ 3.95m + 8.95b = 47.65 \][/tex]

5. Finally, let's verify the provided options:

- Option 1: [tex]\( m + b = 47.95 \)[/tex]

This option suggests that the sum of the number of magazines and books equals 47.95, which does not correctly represent the given costs and total expenditure.

- Option 2: [tex]\( m + b = 60.55 \)[/tex]

This option also does not correctly combine the costs and the total amount spent.

- Option 3: [tex]\( 3.95m + 8.95b = 47.65 \)[/tex]

This option matches our derived equation and accurately represents the relationship described in the problem.

- Option 4: [tex]\( 8.95m + 3.95b = 47.65 \)[/tex]

This option incorrectly assigns the cost per unit to the wrong variable (m for books and b for magazines), so it's not correct.

The correct equation that models the situation given in the problem is:
[tex]\[ 3.95m + 8.95b = 47.65 \][/tex]