What is maximum value of the function y = - ^2 + 2x + 1?

If x = 12 and y = 3, what is the value of x - y 2? 81 6 3 18

Does the problem involve permutations or? combinations? do not solve. the matching section of an exam has 4 questions and 7 possible answers. in how many different ways can a student answer the 4 ? questions, if none of the answer choices can be? repeated?

Which of the following expressions is equal to 2x^2+8