Determine whether the algebraic expression is a polynomial. If it is a polynomial, write the polynomial in standard form, determine the degree, and state if it is a monomial, binomial, or trinomial. If it is polynomial with more than three terms, say the expression is a polynomial
5x - 8x +3

other answer is correct. i had used the radius of the radius somehow. a website:

the answer is a beach is the best place to be

180°

step-by-step explanation:

sum of equilateral triangle=180°

< n=60°

< m=120°°[angle supplementary of equilateral angle]

< m+< r+< x=360°(sum of exterior angle of triangle)