5x-3=42. To solve you add three to both sides making the equation 5x=45. Then you divide both sides by five, and you get 9 as your answer.
$3.9584067435 which would be $3.96 rounded to the nearest penny
Since you are trying to figure out how many miles she can drive in 1 hour and you already have half of that hour, all you would need to do is double that number.

×

=

Now, all you would need to do is simplify the answer.

= 1

or 1.6
The answer would be, Suzy can drive 1

or 1.6 miles in 1 hour.
I hope this helps!