Arthur makes $216 each week writing a column for a newspaper. he recently wrote his first book and earns $7 for each copy sold. last week, he made $517 from the newspaper and sales of his book combined. which of the following accurately describes arthur's profit from last week and number of copies of his book that were sold? 216 - 7c = 517; 41 copies 216 - 7c = 517; 45 copies 216 + 7c = 517; 46 copies 216 + 7c = 517; 43 copies