Acostume that normally sells for $10 is on sale for 10% off. after the deduction is taken , an additional 9% must be paid for sales tax. whay is the total cost to buy a costume

The total cost to buy a costume is $9.81

Step-by-step explanation:

$10 less 10% = 10 * .1 = $1

Subtract 10% discount of $1

$10 - $1 = $9

Add on 9% sales tax

$9 * .09 = $0.81

Add sales tax to discounted price

$9 + $0.81 = $9.81

step-by-step explanation:

use pothagarean therom

a^2+b^2=c^2 so first ac

acm is a right triangle because c= 90°

and am (the hypotenuse or c) =16+9 =25

but there is not enough info we need another angle or side length