4. Which pair of expressions below is equivalent?
A. x + y + x + y and 2(x + y)
B. 5(2x – 3y) and 10x – 3y
C. 4x - 5y and 5y - 4y
D. 9x + 2y and 11xy

Aman is 6 feet 3 inches tall. the top of his shadow touches a fire hydrant that is 13 feet 6 inches away. what is the angle of elevation from the base of the fire hydrant to the top of the man's head?

How many doughnuts are equal to 20 cookies.? 3 apples = 5 bananas6 cookies = 7 apples2 doughnuts = 1 banana

B. two events are dependent if the occurrence of one event changes to occurrence of the second event. true or false