If you have 60 and get 45 as discount how much the percentage

Which of the following is true for the relation f(x)=2x^2+1

You are at a restaurant and owe $56.20 for your meal. you want to leave an 18% tip. approximately how much is your tip?

To finance her community college education, sarah takes out a loan for $2900. after a year sarah decides to pay off the interest, which is 4% of $2900. how much will she pay