Which expression is equivalent to 3r-6+r3r−6+r?

He that is measured at 220° is a reflex angle. the opposite angle is obtuse. find the measure of obtuse .

John used linear combination to solve the system of equations shown. he did so by multiplying the first equation by -3 and the second equation by another number to eliminate the x-terms. what number did jonas multiply the second equation by? 4x-6y=23x+5y=11

Is the power produced directly proportional to the wind speed, give reasons for your answer?