15 + 0.2x = 20 + 0.15x
0.05x = 5
x = 100 miles
The value of x in the triangle is (a) 22
<h3>How to solve for x?</h3>
The complete question is in the attached image.
From the attached image of the triangle, we have:

Evaluate sin(45)

Solve for x

Divide
x = 22
Hence, the value of x is (a) 22
Read more about special triangles at:
brainly.com/question/654982
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Answer:
D ; Yes because the Pythagorean theorem works
Step-by-step explanation:
The measure of all three sidelengths make a right triangle
Yes because 4 times 5 is 20 and 15 + 5 is 20