Solve 5n=20 math right now please

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

In a class, there are 12 girls. if the ratio of boys to girls is 5: 4 how many boys are there in the class

Solve the following inequalities and show the solution on a number line. 2x+3< 3(4x+5)