Which steps could be used to solve this story problem?

billy had 20 rubber balls and 12 plastic balls. he shared the balls equally among 4 friends.

how many more rubber balls did each friend get than plastic balls?

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).

Complete the solution of the equation. find the value of y when x equals to 28 x+3y=28

Acircle has a radius of 12.6cm what is the exact length of an arc formed by a central angle measuring 120