Which are the solution of x2 =-5x +8

The two square pyramids are similar. find the total volume of both pyramids if the ratio of their surface areas is 9/16

X^2/100+y^2/25=1 the length of the major axis is: a)5 b)10 c)20

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