Expand the number 0.398

Express the following as a function of a single angle, cos(60) cos(-20) - sin(60) sin(-20)

Ac contractor is building a new subdivision outside of the city. he has started work on the first street and is planning on the other streets to run in a direction parallel to the first. the second street will pass through (-2,4) find the equation of the location of the second street in standard form. a.2x+y=2 b. x-y=2 c.2x+y=2 d. x+y=2

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