Answer:the number of books that Sally sold is 21
Step-by-step explanation:
Jack sold 126 books. Joe sold 1/2 as many books as many books as jack. This means that the number of books that Joe sold would be
1/2 × 126 = 63
Sally sold 1/3 as many books as joe. This means that the number of books that Sally sold would be
1/3 × 63 = 21 books.
The situation is represented by a drawing with a right triangle where an airplane is at the top corner, the elevation angle (opposite to the airplane) is 70°, the height (vertical leg) is x, and the adjacent leg (horizontal leg) to the 70° angle is 800.
Then, to find the height x, which is the opposite leg to the angle, you can use the tangent ratio, which is opposite leg divided by adjacent leg:
tan(x) = opposite leg / adjacent leg => tan(70°) = x / 800
Answer: tan(70°) = x / 800
3.) (2,1), (4,2), (6,4), (7,5), (8,6)
