Statistics problem please someone help

What is the inverse of the function f(x) = 2x + 1?

How do you find p(a and b) if a and b are independent events for two or more actions, such as tossing a coin twice and finding p(heads and heads)? 2. how do you find p(a or b) if a and b are independent events for one action, such as spinning a four-color spinner once and finding p(red or blue)?

In the diagram below de and ed are tangent to 0 which expression gives the measure of def