PLEASE HELP: If an $19.95 item has a 7% sales tax, what would be the cost?

Its due ! write an equation in which the quadratic expression 2x^2-2x 12 equals 0. show the expression in factored form and explain what your solutions mean for the equation. show your work.

Ineed with number 6 , explain how to get 1978

Jonathan puts $400 in a bank account. each year the account earns 6% simple interest. how much interest will be earned in 5 years?