Answer:
The commutative property of multiplication states that changing the order of the numbers we are multiplying, does not change the product.
B (2x+5y=-10) is the answer.
X - y = 2400/6 = 400 where x = speed of plane and y = speed of wind.
x + y = 2400/5 = 480 - flying with the wind
adding the 2 equations
2x = 880
x = 440
Speed of the plane with no wind = 440 mph
Round 9 3/4 to 10 ft
10 × 4 = 40 ft²
answer is 40ft² estimated
