Write two different ways to decompose 6/10 into a sum

Let f(x) = 3 − x . find the average rate of change of f(x) from x = a to x = a + h and simplify your answer so that no single factor of h is left in the denominator.

Solve the equation by completing the square. x^2+2x=17

5. write an equation for the line that is parallel to the given line and that passes through the given point. y = –5x + 3; (–6, 3)