So all you have to do is add 554 and 600 to get 1154 and then make it negative so it would be A
It started at 152 feet below sea level( or -152 feet), then was instructed to rise 63 feet. That would bring it to 89 feet. Then to fall 84 would leave it at 173 feet below sea level(or -173 feet)
Answer:
<h2>
140°</h2>
solution,
Let <DEF= x°
<CDE= 2x°
<BAF= 90°
The sum of interior angle of hexagon= 720°
<A + <B + <C + <D + <E +<F = 720°

Again,

Hope this helps...
Good luck on your assignment..
1. Given
2. Combine like terms
3. Subtraction POE (Property of Equality)