Final answer:
The trip from Las Vegas took approximately 3913.14 miles.
Step-by-step explanation:
To find the time it took for the trip from Las Vegas, we can use the formula: Speed = Distance / Time. Let's denote this as:
Speed₁ = 161 mph
Speed₂ = 230 mph
Time₂ = 7 hours
We know that the distance going and returning is the same, so let's denote the distance as 'D':
Distance = D
Using the formula, we can write two equations:
Speed₁ = D / Time₁
Speed₂ = D / Time₂
Substituting the given values, we have:
161 = D / Time₁
230 = D / 7;
To solve for 'D', we can rearrange the second equation to find 'D', and then substitute into the first equation:
230 * Time₁ = 7 * D;
Time₁ = 7 * D / 230;
Substituting the value of Time₁ into the first equation:
161 = (7 * D / 230) / Time₁
Simplifying, we get:
161 * Time₁ = 7 * D / 230;
161 * Time₁ = 7D / 230;
161 * Time₁ = 7D / 230;
Cross multiplying:
161 * 230 = 7D * Time₁;
Simplifying, we get:
D = 161 * 230 / (7 * Time₁);
Substituting the given value of Time₂ into the equation:
D = 161 * 230 / (7 * 7);
Calculating, we get:
D = 3913.14;
Thus, the trip from Las Vegas took approximately 3913.14 miles.