18sqrt(x) I'm assuming that 3(sqrt(x))5 is equal to 15sqrt(x). If that is the case, just perform the multiplication within each term and treat the sqrt(x) as a variable when you add the all together. It is okay because they are like terms.
It is always linear it has a y intercept at 7 and an X intercept at -7 domain: (-infinity, infinity) range: (-infinity, infinity) integral: (1/2) x^2+7× derivative: 1
7 + 