Let f be a function of two variables that has continuous partial derivatives and consider the points A(6, 4), B(7, 4), C(6, 10), and D(18, 13). The directional derivative of f at A in the direction of the vector AB is 5 and the directional derivative at A in the direction of AC is 5. Find the directional derivative of f at A in the direction of the vector AD. (Round your answer to two decimal places.)

Asap its important using the information in the customer order, determine the length and width of the garden. enter the dimensions.length: feetwidth: feet

Which of the expressions (on the photo document i inserted) together represent all solutions to the following equation? 8cos(12x)+4=-4 *the answer should be in degrees.* > i would like for someone to explain the process to find the solutions for this.

Which statements are true? check all that apply. the line x = 0 is perpendicular to the line y = –3. all lines that are parallel to the y-axis are vertical lines. all lines that are perpendicular to the x-axis have a slope of 0. the equation of the line parallel to the x-axis that passes through the point (2, –6) is x = 2. the equation of the line perpendicular to the y-axis that passes through the point (–5, 1) is y = 1.