Sasha thought of a number. She added 22.5 to the number then multiplied the result by 2. a) Write this function as a mapping. b) Use inverse functions to work out the number Sasha thought of. Show your working.

Follows are the solution to these questions:

Step-by-step explanation:

For point a:

Let the number is = x then,

equation / mapping function:

For point b:

Calculating the inverse function:

now we change the value of x and y so, it will gives the inverse function in standard parameters:

the correct is answer is a 9-sided polygon!