Answer:
2
Step-by-step explanation:
15+12=27
54 / 27 = 2
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
1st multiply 2 x 8 x 144 = 2304 in^3divide 2304 by 144 = 16 board feet
Hi!
We can see the river is a straight line.
This means that the angles that fall upon it are supplementary angles, and will add up to 180 degrees.
Therefore:

Combine like terms:

Subtract 21 from both sides:

Divide both sides by 3:

Therefore, the value of x is 53 degrees.