Answer:
B
Step-by-step explanation:
Since the triangle is right use the tangent ratio to find x
tan64° = 
= 
Multiply both sides by 11
x = 11 × tan64° = 22.55 → B
Answer:
(-3, 3).
Step-by-step explanation:
4x^2-36= 0
4x^2 = 36 Taking square roots of both sides:
2x = +/- 6
x = +/- 3.
Step 1) Add up the three given angles: 125+109+83 = 317
Step 2) Subtract the result (found in step one) from 360
360 - 317 = 43
The reason for the 360 is because for any four-sided polygon, the angles always add up to 360 degrees.
The answer is 43
