An author is paid $500 as an advance on their book plus an additional $4 for every book sold. if the author earns $880, how many books has he or she sold?

What expression is equivalent to 42x-56y

If f(x) = -5x + 1 and g(x) = x3, what is (gºf)(0)? enter the correct answer

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)?