Question

Sam bought brushes for $8 , a palette for $5 and oil paints for $15 he paid $29.82 in all what sales tax rate did Sam pay

Answer 1

Sam's total purchase is 8 + 5 + 15 = 28

He paid 29.82. So, algebraically,

28 * (1+ r) = 29.82
28 + 28r = 29.82
28r = 1.82
r = 1.82/28
r = .065

or 6.5% sales tax.

Prove it:

28 * (1 + .065) = 29.82??
28 x 1.065 = 29.82??
29.82 = 29.82 YES!!

Hope that helps.