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Which algebraic expression is a polynomial? See below

Savannah is painting a striped background for a mural on a wall that is 1515 yards long. she wants a total of 9696 stripes that are all the same width. which calculation should savannah use to decide how wide to make each stripe?

The area of square garden is 300m squared. how long is the diagonal?

Use circumcenter theorem to solve for the given values