Hello so I have finals on the picture above ^ Any advice how I can pass?
(Im doing this in class-)

Me solve this problem, and someone clearly explain to me how to solve it.1.) use the value of the discriminant to determine if the given trinomials has 2 real solutions, 1 real solution, or no real solutions.a.  x2  − 4x  − 7 = 0b. 4r2  + 11r  − 3 = 0c. 3m2  + 7 = 0d.  t2  + 2t  + 1 = 0

Write a function for a rotation 90 degrees counter clockwise about the origin, point 0

Erin bought christmas cards for $2 each to send to her family and friends. which variable is the dependent variable?