(Solved): Please help fast (keep short please) aw Find when r= -3 and s= -5 if w(x,y,z) = xz + y, x= 3r+1, y ...

aw Find when r= -3 and s= -5 if w(x,y,z) = xz + y², x= 3r+1, y=r+s, and z=r-s. dr OA. -16 OB. -12 O C. -18 O D. 6 Find and sketch the domain for the function cos xy) foxy)=- Find the domain of the function. Express the domain so that coefficients have no common factors other than 1. Select the correct choice below and, if necessary, fill in the answer box to complete your choice OA. The domain is all points (x,y) satisfying FO: OB. The domain is all points (xy) satisfying 0. OC. The domain is all points (x,y) satisfying >0. OD. The domain is the entre xy-plane Choose the correct sketch below. The domain is shaded in yellow OA B. Oc OD. a 6 1