Anumber is multiplied by 5 and then 3 is subtracted from the product the result is 12 find the number

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

Which of the following will form the composite function?

Perform the indicated operation and write the answer in the form a + bi. (-5 + 2) + (3 - 6i)