Ed lined up 12 guitar pics side to side on his desk. Each guitar pick measured 15 mm wide. How many centimeters wide was his line of guitar picks?

Look at the figure below: triangle abc is a right triangle with angle abc equal to 90 degrees. the length of ac is 5 units and the length of ab is 4 units. d is a point above c. triangle adc is a right triangle with angle dac equal to 90 degrees and dc parallel to ab. what is the length, in units, of segment cd?

Write an inequality for this description. - one fourth of the opposite of the difference of five and a number is less than twenty.

Which rotation about its center will carry a regular hexagon onto itself