Use sustitution method 2x+y=5 x+3y=5

Which polynomial function has x intercepts -1, 0, and 2 and passes through the point (1, -6)

The table below shows the height of a ball  x  seconds after being kicked.  what values, rounded to the nearest whole number, complete the quadratic regression equation that models the data? f(x)  =  x2  +  x  +  0based on the regression equation and rounded to the nearest whole number, what is the estimated height after 0.25 seconds?   feet

Standard deviation of 19,29,21,22,23