The vertex of this parabola is at (5, -4). which of the following could be its equation?

a. y = 2(x - 5)^2 + 4

b. y = 2(x - 5)^2 - 4

c. y = 2(x + 5)^2 + 4

d. y = 2(x + 5)^2 - 4

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 customer price index(cpi), which measures the cost of a typical package of customer goods,was 208.8 in 2011 and 244.1 in 2016.let x=11 corresponding to the year 2011 an estimate to cpi into 2013 and 2014. assume that the data can be modeled by a straight line and the trend to continue idenfinitely.use data points to find such a line and then estimate the requested quantities

Is a square always, sometimes, or never a parallelogram