solve 4x+x+4=8x-3x+4. does the solution, no solution, or infinitely many solutions? if one soultion, write the solution. explain

What is the difference between regular convex and concave polygons

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

Need on this one asap im almost done with this subject