When multiplying 15/x • x/3, is it necessary to make the restriction x ≠ 0 ? Why or why not ?

Factor and solve to find roots x squared -x - 90 =0

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

Write an eqautoin of the line that passes through the give points -3,-2 and 2,-1