Answer:
m<y= 75
Explanation:
A straight line is equal to 180.
180-105=75
Because, these two angles are attached to each other and same side interior angles.
meassure of angle y is 75
This was so because the microscopes were not of high resolutions back then.
The answer is A: salt content
True. Faults are associated with,or form, the boundaries between Earth's tectonic plates