Pls need help and show the workings Express 2½as a fraction of 2½hour ​

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

Which steps could be part of the process in algebraically solving the system of equations, y+5x=x^2+10 and y=4x-10

Extra points! find the missing dimension! need asap