590.92-219.38 what is the value of the expression?

What are the constants in this expression? -10.6+9/10+2/5m-2.4n+3m

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?

Which equation represents h for right triangle abc