Explain how to use the midpoint formula to prove or disprove that abcd is a parallelogram. a) prove that ac and bd do not have the same midpoint. the diagonals of a parallelogram cannot have the same midpoint. b) prove that ad and bc have the same midpoint. all sides of a parallelogram are congruent; therefore, they have the same midpoint. c) prove that ac and bd have the same midpoint. the diagonals of a parallelogram bisect each other; therefore, they have the same midpoint. d) prove that ab and cd do not have the same midpoint. all sides of a parallelogram are congruent; therefore, they have different midpoints.

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.

Someone answer this asap rn for ! a discount store’s prices are 25% lower than department store prices. the function c(x) = 0.75x can be used to determine the cost c, in dollars, of an item, where x is the department store price, in dollars. if the item has not sold in one month, the discount store takes an additional 20% off the discounted price and an additional $5 off the total purchase. the function d(y) = 0.80y - 5 can be used to find d, the cost, in dollars, of an item that has not been sold for a month, where y is the discount store price, in dollars. create a function d(c(x)) that represents the final price of an item when a costumer buys an item that has been in the discount store for a month. d(c(x)) =

What is the value of the expression below? 148+(-6)| + |– 35= 7|