Two walls are 10 ft long and the other 2 walls are 7 ft long what's the total square foot of the room

Ammonia molecules have three hydrogen atoms and one nitrogen atom.how many of each atom arein five molecules of ammonia

Asystem of equations has 1 solution.if 4x-y=5 is one of the equations , which could be the other equation ?

Find the magnitude, correct to two decimal places, made by each of the following with positive direction of the x axis a) y= x the answer is 45° but i don’t know how