How many liters of a 30% alcohol solution must be mixed with 20 liters of a 50% solution to get a 40% solution?

Explain how you can use the associative property to evaluate (7x50)x4.

Evaluate the discriminant of each equation. tell how many solutions each equation has and whether the solutions are real or imaginary. 4x^2 + 20x + 25 = 0

The coordinates of vortex a’ are (8,4) (-4,2) (4,-,4) the coordinates of vortex b’ are (6,6)(12,-,12)(12,12) the coordinates of vortex c’ are(-2,,12)(4,12)(12,-4)