Simplify the following: a)12: 18: 36. b)320: 480. c)16mm: 480

Which statement describes surface features called maria on the moon

If x is 6, then 7x= a. 13 b. 42 c. 42x d. 76

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?