The answer for this would be 23.4.
This is because 1.3 = 1 mile. Therefore you should do 1.3 x 18
which equals 23.4!
Answer
Explanation
The quadratic equation to be solved is
x² + 4x - 4 = 0
The graph of this equation is plotted and attached under 'Answer'.
From the graph, we can see that the solutions of the equation include
x = -4.828 and x = 0.828
The equation has two roots, that is two solutions.
Hope this Helps!!!