Answer:
17°
Step-by-step explanation:
Look everything you have above the horizontal line.
It's a 73° angle, plus the one you need, plus 90°. They add up to 180.
m+73+90=180, or m=17.
In right triangle XZW, the height WY is the geometric mean of segments ZY and XY.
Hence,
0.3
-14 *3 and -14 + 3