A) Here is a number machine.
Input
Output
9
x2
+ 3
Work out the output when the input is 9.
b)
Here is the same number machine.
Input
Output
Work out the input when the output is 17.

Find the constant of variation for the relation and use it to write an equation for the statement. then solve the equation.

Precalculus question, image attached.

72 the length of a side of a triangle is 36. a line parallel to that side divides the triangle into two parts of equal area. find the length of the segment determined by the points of intersection between the line and the other two sides of the triangle.