4× a first number decreased by a second number is -19 the first number increased by three times the second number is eight find the numbers

Y=4x^2+x-1 solve using quadratic formula

Aline has a slope of 1/4 and passes through point (0.4,-1/2). what is the value of the y-intercept?

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