To travel the erie canal , a boat must go through locks that raise or lower the boat. traveling east , a boat would have to be lowered 12 feet at amsterdam , 11 feet at tribes hill , and 8 feet at randall. by how much does the elevation of the boat change between amsterdam and randall?

The correct answer is:

31 feet.

Explanation:

The boat is lowered 12 feet at Amsterdam. It is then lowered 11 feet at Tribes Hill; this is a running total so far of 12+11 = 23 feet.

The boat is then again lowered 8 feet at Randall. This makes a total of 23+8 = 31 feet that the boat is lowered.

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step-by-step explanation:

the least common denominatore of 7 and 2 is 9

step-by-step explanation:

7+2=9