For the equation 21 + 3x = 3x + k, which value of k will create an equation with no solutions?

A. x
B. 3x
C. 15

What is the distance between point a and b

Need ! 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?

What is the equation of a line that passes through points (0, 4) and (-4,-8)?