Simplify -y- 6x + 4 + 3x - 8 + y

Can someone answer it, and plot it, for 20 points and brainliest answer? p.s. they're the same ! : )

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

Determine the difference: 3.2 × 1010 – 1.1 × 1010. write your answer in scientific notation.