Two angles in a triangle add up to 108 degrees what is the size of the third angle

Which values for a and b will create infinitely many solutions for this system of equations? ax-y=8 2x+y=b

Mary had at least an 80% on her test write an inequality to represent this situation

The random variable x is the number of occurrences of an event over an interval of ten minutes. it can be assumed that the probability of an occurrence is the same in any two-time periods of an equal length. it is known that the mean number of occurrences in ten minutes is 5.3. the appropriate probability distribution for the random variable