You go to the store to buy a new outfit. It costs $68.00. It has a sign that it is 18% off. The sales tax is 7%. How much will you pay for the outfit? (Remember tax is last) *

I will pay $ 59.6632 for the outfit.

Step-by-step explanation:

The original price is $68.00 and it had a disccount of 18%, therefore the new value is the original one, which is 100%, subtracted by the disccount, therefore it is: 100% - 18% = 82%. We can apply a rule of three in order to calculate this value, as shown below:

$68.00 -> 100%

$x -> 82%

68/x = 100/82

100*x = 68*82

100*x = 5576

x = 5576/100 = 55.76

This is the value pre tax, but we need to calculate the value after the tax of 7%. Applying the same thought process as before, the value after taxes is 107% of the value pre tax. So we can also use a rule of three as shown below:

$55.76 -> 100%

$y -> 107%

55.76 / y = 100 / 107

100*y = 55.76*107

100*y = 5966.32

y = 5966.32 / 100 = $ 59.6632

I will pay $ 59.6632 for the outfit.

4 and 5)16.97 or 12√2

6)15.59 or 9√3

7)y = 15.59 or 9√3     x =27

8)17.80