Which expression is equivalent to (x² 5)(3x + 2x
9)?
O A. x(3X + 2x) - 5x(2x- 9)
OB. X(3x + 2x9) - 5x(3x+ 2x-9)
OC. x(3x+ 2x- 9) - 5x
OD. X(3X² + 2x- 9) + 5x(3x +2x- 9)

Logan wants to know how many skateboards have defective parts. he inspects 20,000 skateboards and keeps track of the number of defects per board. use his probability distribution table to find the expected value for defects on a skateboard.

Evaluate this using ! 0.25^2 x 2.4 + 0.25 x 2.4^2 − 0.25 x 2.4 x 0.65

Look at the figure below: triangle abc is a right triangle with angle abc equal to 90 degrees. the length of ac is 5 units and the length of ab is 4 units. d is a point above c. triangle adc is a right triangle with angle dac equal to 90 degrees and dc parallel to ab. what is the length, in units, of segment cd?