Which ordered pair in the form (x, y) is a solution of this equation? 3x-4y=21
A) (-2,-3)
B) (0,7)
C) (7,0)
D) (-3, -2)

Which of the following would be a good name for the function that takes the weight of a box and returns the energy needed to lift it?

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

What is the value of the discriminant of the quadratic equation -2x = -8x + 8 and what does its value mean about thenumber of real number solutions the equation has?