Assume that a is a real number such that the quadratic function f (x) = ax 2 + 100 does not have a maximum value. Which of the following quadratic functions has a maximum value? A. p(x) = (a + 100)x2 + 100 O B. g(x) = ( )x2 + 100 O C. h(x) = a 2x2 + 100 O D. g(x) = -ax2 + 100

7+(3n++8) what is the answer to this?

Runners run around the school's football field. the cross country coach determines that the width of the field is seventy yards shorter than the length. part a write an expression that represents the perimeter of the football field. let x represent the length of the football field. include parentheses in your expression. next, write an equivalent expression that does not include parentheses. what property or properties did you use to simplify? explain. part b the cross country coach later determines that the length of the football field is 120 yards. all students must run five laps. using your answer from part a, determine the actual number of yards that each athlete must run in the tryouts. in order to make the team, students must complete the laps in 6 minutes. how quickly must they run each lap?

While on a train trip, marsha noticed that there were 35 people in her train car. after the next stop, there were only 21 people in her car. if p represents the percent decrease in the number of people in marsha's train car, what is p?