Pls help me:) I rlly need it!

In the polynomial below, what number should replace the question mark to produce a difference of squares? x2 + ? x - 36

The annual snowfall in a town has a mean of 38 inches and a standard deviation of 10 inches. last year there were 63 inches of snow. find the number of standard deviations from the mean that is, rounded to two decimal places. 0.44 standard deviations below the mean 2.50 standard deviations below the mean 0.44 standard deviations above the mean 2.50 standard deviations above the mean

Two years ago a man was six times as old as his daughter. in 18 years he will be twice as old as his daughter. determine their present ages.