Do these 5 problems for your project and SHOW ALL your work. You can either factor or do the quadratic formula. 3x^2 + 7x – 6 = 0 -x^2 – 2x + 8 = 0 -3x^2 – 2x – 5 = 0 x^2 – 1 = 0 x^2 + 4x – 7 = 0 (Last one you have to use quadratic formula) On each question tell what way you solved it and why.

The life (in hours) of a magnetic resonance imagining machine (mri) is modeled by a weibull distribution with parameters β = 2 and δ = 370 hours. (a) determine the mean life of the mri. (round your answer to 2 decimal ) determine the variance of the life of the mri. (round your answer to 1 decimal ) what is the probability that the mri fails before 250 hours? (round your answer to 4 decimal places.)