Can u guys help please

Is δ pmr similar to δ smn ? if so, which postulate or theorem proves these two triangles are similar?

The trigonometric ratios sine and secant are reciprocals of each other

Given the quadratic function f(x)=3x^2-24x+49 a. use “completing the squares” to convert the quadratic function into vertex form b. state the vertex c. find the x and y intercepts d. graph the function