Let $p$ and $q$ be the two distinct solutions to the equation $$(x-3)(x+3) = 21x - 63.$$ If $p > q$, what is the value of $p - q$?

The two-way frequency table below shows data on playing a sport and playing a musical instrument for students in a class.

What are the measures of ∠a, ∠b, ∠c and ∠d? explain how to find each of the angle measure.

The graph and table shows the relationship between y, the number of words jean has typed for her essay and x, the number of minutes she has been typing on the computer. according to the line of best fit, about how many words will jean have typed when she completes 60 minutes of typing? 2,500 2,750 3,000 3,250