225 3x5 is 15 and to the power of 2 is 15x15 so multiply and you get 225 hope it helps
Answer:
65 degrees
Step-by-step explanation:
The angles will sum up to 360, just do 360 - all known angles
360 - 90 - 128 - 77 = 65
3x-x+2=4, That should be your answer if that is what your looking for
88 degrees is the correct answer