ABCF is a rectangle. CDEF is a trapezium.
AE is a straight line.

AB = 9cm, AE = 11cm, DE = 5cm.

The perimeter of rectangle ABCF is 28 cm.

Calculate the area of trapezium CDEF.

42cm^2

Step-by-step explanation:

i have no idea but just put that it works

i could probably can you me with a question of mine?

step-by-step explanation:

- 2 + 10x³ - 21x² + 19x - 4

step-by-step explanation:

each term in the second factor is multiplied by each term in the first factor

x²(- 2x² + 4x - 1) - 3x(- 2x² + 4x - 1) + 4(- 2x² + 4x - 1) ← distribute

= - 2 + 4x³ - x² + 6x³ - 12x² + 3x -8x² + 16x - 4

collect like terms

= - 2 + 10x³ - 21x² + 19x - 4 ← in standard form