Page 410 - Algebra 1

21. Tell whether the set of ordered pairs (2, 8), (4, 16), and (7, 28) represents a direct (56) variation.
22. Tennis Atenniscourt’sdimensionscanberepresentedbyawidthof4x+25feet (58) and a length of 2x + 15 feet. Write a polynomial for the area of the court.
23. Determine the slope of the line graphed below. (44)
(-1, -4)
*24. Find the product of (x + 2)(x + 9) using the FOIL method.
(58)
25. Translate the inequality x - 2.5 > 4.7 into words. (45)
26. Hobby Eleanor has more than twice as many football trading cards as José.
(45) Eleanor has 79 trading cards. What is the greatest number of trading cards José
might have?
27. Multi-Step The varsity football team started summer training with 85 players.
(47) 10 players dropped out after 1 week of training, and then 7 players dropped out
after 2 weeks.
a. What was the percent of decrease for the first week? What was the percent of
decrease for the second week?
b. What was the total percent of decrease for the 2 weeks of summer training?
28. Law Enforcement Arnold is using the graph to represent a speed limit of 45 miles (50) per hour. What restrictions should also be placed on the graph?
30 40 50 60
29. Before painting, the edg_es around a rectangular light_fixture must be taped. The
2a
(51) length of the fixture is 3a - 2 yards, and the width is 3a - 2 yards. How much tape
is needed?
30. Justify Identify the slope and y-intercept of the line y = x - 4. Explain. (52)
(-1, 5)
4
y
2
x
O
-3
-2
1
-2
-4
a-2
Lesson 60 395