Sin(x-y) if cos x =8/17 and cos y = 3/5

How many solutions does the nonlinear system of equations graphed below have? a. one b. zero c. four d. two

For which pairs of functions is (f•g)(x)=12x? f(x)=3-4x and g(x)=16x-3 f(x)=6x2 and g(x)= 2/x f(x)= and g(x) = 144x f(x)=4x and g(x) =3x

How can you find the magnitude of a vector, v = < x,y > , where the horizontal change is x and the vertical change is y?