For the residual plot below, explain whether the plot shows a linear or non-linear model and why. See attached

How many zeros does the function f(x)=4x3-x2+1 have

Plz hurry evaluate the expression a+b where a=8 and b=19

Which statements describe the solutions to the inequality x< -20 check all that apply. there are infinite solutions. each solution is negative. each solution is positive. the solutions are both positive and negative. the solutions contain only integer values. the solutions contain rational number values.