VERY URGENT The Walnut Cove Club sells hot dogs and drinks from a concession stand at the annual 4th of July parade. Carl bought 5 hot dogs and 4 drinks and paid $21.40. Susan purchased 4 hot dogs and 2 drinks and was charged $14.60. What is the cost of 1 hot dog?

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.

Four congruent circular holes with a diameter of 2 in. were punches out of a piece of paper. what is the area of the paper that is left ? use 3.14 for pi

Can someone check if i did this correct. it’s number 4 if you’re wondering.