Find the domain of the rational function.f(x) = The domain is all real numbers for x except:

If y varies directly as x, find the direct variation equation for the situation.y = 5 when x = 15

Multiply or divide as indicated. Simplify completely. To use the equation editor, click on above the box. Must show all work for full credit.

Solve the equation. Must show all work. 

Use factoring to solve the quadratic equation.x2 + 7x – 30 = 0

Factor the polynomial completely. Only one of the following choices is one of the factors of the polynomial. Choose the correct factor. If it is not factorable, state it is prime.49×2 + 4y2

Simplify the rational expression. To use the equation editor, click on above the box.

Perform the indicated operation. Simplify if possible. Must show all work for full credit. LEAVE ANSWER IN FACTORED FORM. 

Which of the following is associated with contact dermatitis?

Some people have resistance to HIV infection due to what?