Write a point slope form of the line through point j(4,1) with slope -5

Find the gradient of f(x, y,z)equals=left parenthesis x squared plus y squared plus z squared right parenthesis superscript negative 1 divided by 2 baseline plus ln left parenthesis x right parenthesis x2+y2+z2−1/2+ln(xyz) at the point left parenthesis negative 2 comma 1 comma negative 2 right parenthesis(−2,1,−2).

How long does it take natsumi to clean up after she is done? table: .area time30. 245. 2.7560. 3.5

Ijust need these 2 questions answered (the second pic is just confirmation i'm not confident in that answer)