Arectangle picture frame has a width of 9cm and a length of x cm .which expression represents the perimeter of the picture frame? 2(x+18)2x+92x+18x +9

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)?