Write the following statement as a mathematical expression. State whether the expression is a linear or nonlinear expression in x. Seven subtracted from five times a number, and then the difference added to nine times a number.

First step is to get rid of the square root. remember that a square root is the same as raising to the (1/2) power. see below: multiply exponents per exponent rules to get: remember you subtract exponents from the denominator and add exponents in the numerator so: simplify further: so a is the correct choice. if you don't understand this google exponent rules and it will you understand. look at the image results.