6. 30 miles every 2 hours is the same as 15 miles every hour. When you multiply 15 miles by the number of hours (t), you find the distance. Therefore, the answer is d = 15t
7. 3 pounds of onions cost 2.67, so if you divide 2.67 by 3, you will have .89 for every pound. Now you multiply .89 by 4 and 5, since those are the only pounds in the answer choices, and see if they match. .89 * 4 = 3.56 and .89 * 5 = 4.45. C is the only one that matches, since 4.45 / 5 = .89