Can some one explain how to get the answer and what is the answer

15 and 14.7 are 1 apart, so 15 – 14.7 must be 1.

From a group of 10 men and 8 women, 5 people are to be selected for a committee so that at least 4 men are on the committee. howmany ways can it be done?

Write the point slope form of the equation of the line passing through the points (-5, 6) and (0.1).