André and elena are saving money. André starts with $100 in his savings account and adds $5 per week. Elena starts with $10 in her saving account and adds $20 each week. After how many weeks will André and Elena have the same amount of money in their savings account?

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).

The moats separating people from the animals are 5 m wide for lions and 4 m wide for the elephants. if the lion’s moat is 4 m deep, how deep should the elephants’ moat be?

What is the value of p in the equation y^ = -4x?