The sale price of a 26$ item are a 50% discount

Will mark brainliest question in the pic.

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

The sum of two numbers is 12 and their difference is 18 what are the two numbers