Which value for x proves that abc=def by sss

Each equation given below describes a parabola. which statement best compares their graphs? x = 2y^2 x = 8y^2

Lines a and b are parallel. what is the value of x? -5 -10 -35 -55

The weekly amount spent by a company for travel has an approximately normal distribution with mean = $550 and standard deviation = $40. a) what is the probability that the actual weekly expense will exceed $570 for more than 20 weeks during the next year? (note: one year = 52 weeks) b) what is the probability that actual weekly expenses exceed $580 for 10 or more, but 16 or fewer weeks during the next year?