What is the value of 3c-4d when c=5 and d=1/2

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

The table shows the age and finish time of ten runners in a half marathon. identify the outlier in this data set. drag into the table the ordered pair of the outlier and a reason why that point is an outlier.

5x−4≥12 or 12x+5≤−4 can you with this problem