How much does the 2nd item cost before tax?

The variable in a relation who’s value depends on the value of the independent variable is called what?

Find the zeros of each function. f(x) = x^2 + 5x - 6

In a two-digit number the units' digit is 7 more than the tens' digit. the number with digits reversed is three times as large as the sum of the original number and the two digits. find the number.