Plz solve it would help thanks

The measure of one angle of an octagon is two times smaller that of the other seven angles. what is the measure of each angle?

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

15 liters is approximately how many gallons