Rationalize the denominator of the given radical expression.

18/(√19 + √13)

For the following rational expression, reduce to the lowest terms and indicate values that should not be included in its domain.

(z² - 12z + 36)/(z² + z - 42)

Which of the following statements is true about an isosceles right triangle?

Find the measure of the indicated angles.

For the following equation of a circle, find its center and radius.

x² + y² = 841

Plot the following point on the Cartesian plane and determine the axis or quadrant in which the point lies.

(17, 13)

Identify the graph of the given equation. 

(x -7)² +(y +13)² = 9

Identify if the given relation represents a function. Then, determine its domain and range.

Evaluate f(x + 5) for the function given below.

f(x) = -11x + 31