Suppose a group of x people rent a jeep for $80 for a trip to the beach and plan to share the cost equally. if one person in the group decides not to go, each remaining person has to pay an extra $4. which equation could be used to determine how many people are in the group? a) x − 1 80 − 80 x = 4 b) 80 x − 1 − x 80 = 4 c) 80 x + 1 − 80 x = 4 d) 80 x − 1 − 80 x = 4

In the equations, a and b represent the price per night for a room in hotel a and hotel b, respectively, w weeks after september 1 last autumn. what was the price per night in hotel a when it was equal to the price per night in hotel b? a = 240 − 20w b = 320 − 30w

Jeffery conducted a survey in his school and found that 30 of the 50 eighth grade students' favorite subject is mathematics. based on the results, jeffery concluded that out of the 200 students in his school, 120 students' favorite subject is mathematics. select the statement that is true about jeffery's conclusion. a. jeffery's conclusion is not valid because the sample was biased since only 200 students were surveyed. b. jeffery's conclusion is valid because the sample was random since all of the students were eighth grade students. c. jeffery's conclusion is valid because the sample was random. d. jeffery's conclusion is not valid because the sample was biased since all of the students were eighth grade students.

:24% of students in a class are girls. if there are less than 30 students in this class, how many students are there? how many girls are there?