Nancy bought 360 tropical fish for a museum display. she bought 8 times as many gold fish as angel fish. how many of each type of fish did she buy?

which is a system of equation to model the problem if x represents the number of angel fish nancy bought and y represents the number of gold fish she bought?

a) x - y = 360
y = 8x

b) x + y = 360
y = 8x

c) x + y = 8
y = 360x

d) x + 8y = 360
y = 8x

Identify the type of observational study described. a statistical analyst obtains data about ankle injuries by examining a hospital's records from the past 3 years. cross-sectional retrospective prospective

Scores on the cognitive scale of the bayley-scales of infant and toddler development range from 1 to 19, with a standard deviation of 3. calculate the margin of error in estimating the true mean cognitive scale score, with 99% confidence, if there are 12 infants and toddlers in a sample.

Me with this assignment ! i only partially understand, so explain. also it's a work sample. at the championship bike race, steve and paula were fighting for first place. steve was 175 feet ahead of paula and had only 300 feet left to go. he was very tired and was going only 9 feet per second. paula was desperate to catch up and was going 15 feet per second. who won the bike race and by how far did she/he win?