How many x intercepts appear on the graph of this polynomial function? f(x)=x^4-x^3+x^2-x

What is the solution to this system of equations? y= 2x - 3.5 x - 2y = -14

Find a third-degree polynomial equation with rational coefficients that has roots -2 and 6+i

Astudy claims that the mean age of online dating service users is 40 years. some researchers think this is not accurate and want to show that the mean age is not 40 years. identify the null hypothesis, h0, and the alternative hypothesis, ha, in terms of the parameter μ. select the correct answer below: h0: μ≥40; ha: μ< 40 h0: μ≤40; ha: μ> 40 h0: μ≠40; ha: μ=40 h0: μ=40; ha: μ≠40