Write the equation of the line that is parallel to y=-2x-5 and goes through (4,-1)

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).

Two variables, x and y, vary inversely, and x=12 when y=4. what is the value of y when x=3?

Identify the number 127 as a rational or irrational. explain