Let P be the set of polynomials. Let a, b, c, and d be elements of P such that band d are non-zero elements in P. Which of the following is true regarding the difference below?
The difference is a rational number.
The difference is a polynomial.
The difference is a rational expression.
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The difference is an Integer.

Gretchen is setting up for a banquet. she has 300 chairs and needs to distribute them evenly among t tables. how many chairs should she put at each table? write your answer as an expression.

Arley is building a model of a city map. in one part of the city, three roads form a right triangle, which harley draws as triangle abc, with the following measures: m∠b=90° and m∠a=30°. in his scale model, the hypotenuse of triangle abc, ac¯¯¯¯¯¯¯¯, has a length of 817−−√ cm. what is the value of a (the length of bc¯¯¯¯¯¯¯¯)?

The longer leg of a 30-60-90 trangle is 18