Please help

slope= -1, and it goes through the point (2,5) what is that in standard form

Do u just plot the numbers on the graph like (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).

You have 6 dollars +12 pennies +to quarters + 4 dimes=2 nickels how much do you have