What is the answer of this attachment:

Which graph corresponds to the function f(x) = x2 + 4x – 1?

If the sales price of a dvd is $20 and the markup is 34%, what is the cost of the dvd?

How many heads would you expect if you flipped a coin twice? first, fill in the table below with the correct probabilities. hint: the sample space for flipping a coin twice is {hh, ht, th, tt}. a = b = c = f