You purchase an item that has a 7% sales tax. Write an expression that represents the cost of the item in simplest terms. What is the coefficient? (decimal answer)

Answer 1

Let x = cost of item before tax

r=rate of sales tax in decimal form

Total cost of item with tax can be represented by (1 +r)x

Since sales tax is 7%, r = .07

So Total cost = (1 + .07) x

=1.07x

Coefficient of the above expression is 1.07