The answer is A.
Remember that distributing is a(b+c)= ab+ac
3(r-2)=
3*r + 3*-2=
3r-6
Final answer: A
Yes it is a stirght line sory dont know how to so yeah it is supplementary
It would be 1.65 in decimal form. convert it to fraction and thats your answer
tell you teacher to Fu** off
Cos(theta) = adjacent/hypotenuse
cos(theta) = 6/20
cos(theta) = 0.3
Use the inverse cos or cos^-1 on your calculator to get the angle
theta = 72.5