List all the schools in the school district. For each school, list all the teachers at the school; sort them alphabetically within each school. For each school, list the weights of the students of the teacher who is first on that school's sorted teacher list. Combine the lists and average the results. a. a simple random sample
b. a systematic random sample
c. a stratified random sample
d. a random cluster sample
e. a random stratified cluster sample
f. a multistage random sample
g. a multistage random cluster sample
h. a random stratified multistage cluster sample
i. a systematic sample

On ryan's last social studies test there were two types of questions true/false worth 3 points each and multiple choice questions worth 4 points each

Im so bad at fractions they are not my best math thing to work on

Let us imagine that the number of automobile accidents in a certain region are related to the regional number of registered automobiles in tens of thousands (b1), alcoholic beverage sales in $10,000 (b2), and decrease in the price of gasoline in cents (b3). furthermore, imagine that the regression formula has been calculated as: y = a + b1x1 + b2x2 + b3x3 where y = the number of automobile accidents, a = 7.5, b1 = 3.5, b2 = 4.5, and b3 = 2.5 calculate the expected number of automobile accidents for a football weekend if the region has 25,000 registered vehicles, $75,000 worth of beer is sold, and a gas war causes a 10 cent drop in a gallon of gas.