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4. A taxi service charges a flat rate of [tex]$\$[/tex] 15[tex]$ plus $[/tex]\[tex]$ 2$[/tex] per mile. Which equations correctly model the total fare [tex]$F$[/tex] for [tex]$m$[/tex] miles driven? (Select all that apply.)

A. [tex]$F = 15 m + 2$[/tex]
B. [tex]$F = 15 + 2 m$[/tex]
C. [tex]$F = 2 + 15 m$[/tex]
D. [tex]$F = 2 m + 15$[/tex]


Sagot :

To determine which equations correctly model the total fare [tex]\( F \)[/tex] for [tex]\( m \)[/tex] miles driven by a taxi service that charges a flat rate of [tex]$15 plus $[/tex]2 per mile, let's carefully analyze the given options:

1. Option 1: [tex]\( F = 15m + 2 \)[/tex]

- This equation suggests that the total fare increases by [tex]$15 per mile and adds a flat rate of $[/tex]2.
- This is incorrect because the fare should increase by [tex]$2 per mile and have a flat rate of $[/tex]15.

2. Option 2: [tex]\( F = 15 + 2m \)[/tex]

- Here, the equation correctly adds a flat rate of [tex]$15 and then increases the fare by $[/tex]2 for each mile driven.
- This correctly represents the situation where the total fare [tex]\( F \)[/tex] is composed of a fixed cost of [tex]$15 plus an additional $[/tex]2 for each mile driven.

3. Option 3: [tex]\( F = 2 + 15m \)[/tex]

- This equation suggests that the total fare increases by [tex]$15 per mile and adds a flat rate of $[/tex]2.
- This is incorrect because, as with Option 1, the fare should increase by [tex]$2 per mile and have a flat rate of $[/tex]15.

4. Option 4: [tex]\( F = 2m + 15 \)[/tex]

- This equation adds the per-mile cost of [tex]$2 for each mile (\( 2m \)) and then a flat rate of $[/tex]15.
- This correctly represents the scenario where the fare is a sum of a [tex]$15 flat rate and an additional $[/tex]2 per mile driven.

Therefore, the correct equations that model the total fare [tex]\( F \)[/tex] for [tex]\( m \)[/tex] miles driven are:

[tex]\[ F = 15 + 2m \][/tex]
[tex]\[ F = 2m + 15 \][/tex]

Thus, the correct options are:
- [tex]\( \boxed{2} \)[/tex]
- [tex]\( \boxed{4} \)[/tex]
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