In the attached figure, we have AC = CD, CD = BD and the Angle at the vertex ACD = 64º. What is the measurement of the Angle of the vertex BCD? Help, please!

There are 15 plates and each plate is either 7 or 12 inches diameter. which systems of equations do you use to find the number of 7 inch plates, x and 12 inch plates, y

Which number completes the system of linear inequalities represented by the graph? y> 2x – 2 and x + 4y 2 et 2 3 4

Two years ago a man was six times as old as his daughter. in 18 years he will be twice as old as his daughter. determine their present ages.