What is a predicate of a sentence ? like: the leave's turn yellow in the fall.

which answer is it:
1. the leave's turn
2. in the fall
3. the leave's
4. turn
5. turn yellow in the fall.

PLEASE HELP

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An air conditioning system can circulate 350 cubic feet of air per minute. how many cubic yards of air can it circulate per minute?

Segment ab is shown on the graph. which shows how to find the x-coordinate of the point that will divide ab into a 2: 3 ratio using the formula

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