Solve for x. Leave your answer in simplest radical form , help pretty plzzzzzzz

They paid $93 including tax and tip.
The food cost $73.89.

The tax is 5.8%, so the amount of tax was 5.8% of $73.89.
5.8% * $73.89 = 0.058 * $73.89 = $4.29.

Add the tax to the food cost: $73.89 + $4.29 = $78.18

They paid $93, so the amount of tip was
$93 - $78.18 = $14.82

Now we need to find what percent of $73.89 is $14.82.

To find what percent a part is of a total, divide the part by the total and multiply by 100.

$14.82/$73.89 * 100 = 20.06

They left a 20% tip, so the answer is

c. They left a 20% tip, so the service was probably above average.