Please help quick. I tried everything (2, 7, 7) (2*7*7) and more.

Umm.. just started this 2day and its not on my notes(p′︵‵。)

What would the rule be for the reflection of y=-3

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?