WILL MARK BRAINLIEST IF YOU GIVE ME THE CORRECT ANSWER What is the solution (a, b) to this system of linear equations?

3a+6b=45

2a-2b=-12
(-27, 6)
(-1, 7)
(1, 7)
(27, -6)

Evaluate the discriminant of each equation. tell how many solutions each equation has and whether the solutions are real or imaginary. x^2 - 4x - 5 = 0

Awater truck is filling a swimming pool. the equation that represents this relationship is y=19.75x where y is the number of gallons of water in the pool and x is the number of minutes the truck has been filling the pool.

Which graph represents the linear function below? y-4= (4/3)(x-2)