In the diagram shown, .CDEF is a trapezium
.ABCF is a rectangle
.BD is 9cm
.AB is 6cm
.EF is 3cm
.Perimeter of ABCF is 20cm

Calculate the area of trapezium CDEF. You must show all your working.

Adifferent website gives the cost for the first train as £56.88 and the second train as £20.11 with a £9.50 charge for cycle storage for the whole trip. how much would the journey cost you?

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.

Which describes the difference between the graph of f(x)=x^2 and g(x)=-(x^2-2)