Hel m pl Ty graphed the speed of his car in miles per hour. Which relationship could represent Ty’s ordered pairs he graphed if his unit rate was 60 mph? A.)(1/2, 30), (1, 60), (2, 90), (3, 120) B.)(1/2, 30), (1/4, 15), (1, 60), (3/2, 90) C.)(30, 1/2), (15, 1/4), (60, 1), (90, 3/2) D.)(30, 1/2), (60, 1), (90, 2), (120, 3)

Can any one me with the answers to these questions asap?

Find the number of real number solutions for the equation. x2 + 5x + 7 = 0 0 cannot be determined 1 2

Afactory makes propeller drive shafts for ships. a quality assurance engineer at the factory needs to estimate the true mean length of the shafts. she randomly selects four drive shafts made at the factory, measures their lengths, and finds their sample mean to be 1000 mm. the lengths are known to follow a normal distribution whose standard deviation is 2 mm. calculate a 95% confidence interval for the true mean length of the shafts. input your answers for the margin of error, lower bound, and upper bound.