Can you please help me understand how to solve a trig ratio like this?

Select the correct answer from each drop-down menu. consider the following polynomials equations. 3x^2(x-1) and -3x^3+ 4x^2-2x+1 perform each operation and determine if the result is a polynomial. is the result of a + b a polynomial? yes or no is the result of a - b a polynomial? yes or no is the result of a · b a polynomial? yes or no

Varies inversely with x. if y=8.5 when x=-1 find x when y=-1

In a timed typing test lara typed 63 words per minute.estimate the number of words she should be able to type in half in hour show your work