Find the value of c that makes the expression a perfect square trinomial.

x2 − 15x + c

What is the name used to describe a graph where for some value of x, there exists 2 or more different values of y?

Someone answer asap for ! the total ticket sales for a high school basketball game were $2,260. the ticket price for students were $2.25 less than the adult ticket price. the number of adult tickets sold was 230, and the number of student tickets sold was 180. what was the price of an adult ticket?

Aquadratic equation in standard from is written ax^2= bx+c, where a,b and c are real numbers and a is not zero?