What is the common difference of the arithmetic sequence on which the series is based? : 3 + 4.5 + 6 + 7.5 + 9 + 10.5.

In the proof of the triangle angle sum theorem, you must draw an auxiliary line. which construction must you use to draw this line?

What is the solution to the equation in the & show work i’m very

Y+ 2/y is it a polynomial in one variable or not? and if so, why?