When solving an inequality, when do you reverse the inequality sign?

Find the measures of the complement and the supplement of each angle, m

Suppose that x and y are both differentiable functions of t and are related by the given equation. use implicit differentiation with respect to t to determine startfraction dy over dt endfraction in terms of x, y, and startfraction dx over dt endfraction .

Which of the following is true for the relation f(x)=2x^2+1