Which expression is equivalent to (x +9i)2? A. x2 + 18x + 81
B. x2 + 18xi – 81
C. x2 + 9xi +81
D. x2 + 9xi – 81

In the equations, a and b represent the price per night for a room in hotel a and hotel b, respectively, w weeks after september 1 last autumn. what was the price per night in hotel a when it was equal to the price per night in hotel b? a = 240 − 20w b = 320 − 30w

Plzzz i beg u so much asaaaap ! what is the slope of this line? enter your answer in the box.

Complete the equation of the line through (−10,3) and (−8,−8). use exact numbers.