The millers drove 150 miles in 3 hours howblong will it take to drive 400 miles

Explain how you can use the associative property to evaluate (7x50)x4.

The fence around a quadrilateral-shaped pasture is 3a^2+15a+9 long. three sides of the fence have the following lengths: 5a, 10a-2, a^2-7. what is the length of the fourth side of the fence?

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