Nicole buys a meal in a town with a 9% sales tax. she tips 19% on the bill before adding the sales tax. she pays a total of $23.35. what should be the original cost of her meal?

Your answer is $18. You just take off 19% of 23.35, add it to the total, then add 9% of $19.62

option a is correct.

step-by-step explanation:

scale factor: it is used to find proportional measurements.

proportions means having the same ratio.

scale factor is the ratio of the model measurement to the actual measurement in a simplest form.

or we can say that the ratio of any two corresponding lengths in two similar geometric figures

if the scale factor is more than 1, then it is an enlargement,

if the scale factor less than 1, then it is a reduction.

given the two geometric figure:

by definition of proportions, we have