Add or subtract the following mixed numbers using the first method. (add the whole numbers; add the fractions; combine the parts of the sum for the answer.) be sure your answers are in mixed number format and reduced to lowest terms. 2 2/3 + 4 1/8 =
a 6 2/11
b 6 3/11
c 6 3/24
d 6 19/24

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.

Gretchen is setting up for a banquet. she has 300 chairs and needs to distribute them evenly among t tables. how many chairs should she put at each table? write your answer as an expression.

The perimeter of a movie screen is 54 meters. the screen is 18 meters wide. how tall is it?