The coefficients corresponding to k = 0, 1, 2, ..., 6 in the expansion of (x + y)6
are
O
A. 0,6, 15, 20, 15, 6, 0
O
B. 0, 1,6, 15, 15, 6, 1,0
O
C. 1,6, 15, 15, 6,1
O
D. 1, 6, 15, 20, 15, 6, 1
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Use the elimination method to find the solution to the system of equations. 2x - 3y = -9 -x + 3y = 6

You’re repairing a large rectangular aquarium. the final step is to cover the glass with a protective film. the front and back of the aquarium measure 4 meters by 2 meters, and the sides of the aquarium measure 3 meters by 2 meters. how many square meters of protective film do you need? ( )

Asurvey of 2,000 doctors showed that an average of 3 out of 5 doctors use brand x aspirin.how many doctors use brand x aspirin