Brainliest question please help me please help me now plz

How many different ways can you make change for $.50 using only nickels, dimes, and quarters?

Which statement is true about the extreme value of the given quadratic equation? a. the equation has a maximum value with a y-coordinate of -21. b. the equation has a maximum value with a y-coordinate of -27. c. the equation has a minimum value with a y-coordinate of -21. d. the equation has a minimum value with a y-coordinate of -27.

V=x^4-y^4 pick three expressions that can represent the three dimensions of the prism (each in meters)