Find the point on the terminal side of θ = -3π/4 that has an x coordinate of -1

Use the elimination method to solve the system of equations -x+5y=-4 and 4x+3y=16

Compare these two waves: the blue and orange waves have the same pitch, but the blue wave is louder. the blue and orange waves have the same volume, but the blue wave has a higher pitch. the orange wave has a higher pitch, but the blue wave is louder. the blue wave has a higher pitch, but the orange wave is louder.

What is the area of the trapezoid shown ?