5.1=s. Use the distributive property and add like terms
It can be too late to save for retirement. You want to begin saving at least 45 years before you plan to retire.
<h3>When to start savings for retirement?</h3>
Retirement is when labour stops working at a regular job. When a person retires, they would have a reduced source of income. This is why it is important to save for retirement. The earlier one starts to save for retirement, the more money the person would have when they retire.
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Answer:
The value of a+b is 4.
Step-by-step explanation:
The given function is
![\[f(x) = \left\{ \begin{array}{cl} 9 - 2x & \text{if } x \le 3, \\ ax + b & \text{if } x > 3. \end{array} \right.\]](https://tex.z-dn.net/?f=%5C%5Bf%28x%29%20%3D%20%5Cleft%5C%7B%20%5Cbegin%7Barray%7D%7Bcl%7D%209%20-%202x%20%26%20%5Ctext%7Bif%20%7D%20x%20%5Cle%203%2C%20%5C%5C%20ax%20%2B%20b%20%26%20%5Ctext%7Bif%20%7D%20x%20%3E%203.%20%5Cend%7Barray%7D%20%5Cright.%5C%5D)
It is given that for some constants a and b the function f has the property that f(f(x))=x for all x.
For x≤3,

For x>3,

At x=0,


Using property f(f(x))=x,

.... (1)
At x=1,


Using property f(f(x))=x,

.... (2)
Subtract equation (2) from equation (1).

Divide both sides by 2.

Substitute this value in equation (1).


The value of a is
and value of b is
. The value of a+b is


Therefore the value of a+b is 4.