Page 388 - Algebra 1

12. Multi-Step Tenecia timed her classmates to see how many seconds they could jump (48) up and down on one leg, and got these data results: 40, 33, 41, 36, 26, 38, 44, 46,
44, 35, 40, 37, 40, 31, 38, 41, 33, 51, 38, 40, 43, 35, 37, 38. a. Show Tenecia’s data on a line plot.
b. Analyze Describe the overall shape of the line plot.
c. Generalize Make a statement about this data based on the line plot.
13. Zoo The number of visitors at the petting zoo jumped from 600 in May to 900 in (47) July. What is the percent of increase?
14. Find the sum of (-9z3 - 3z) + (13z - 8z2) using a vertical form. (53)
15. Phone Rates Ronnie is considering switching cell phone plans. The new plan (49) would cost $5.95 per month plus $0.04 cents per minute.
a. Analyze What are the restrictions on the domain and range of this situation? b. Write an equation in slope-intercept form to represent this situation.
16. _Simplify the rational expression, if possible. Identify any excluded values.
(51)
17. Write an inequality for the graph. (50)
k-3 7k - 21
0 1 2 3 4 5 6 7
18. Fitness After six weeks of participating in a fitness program, Joyce jogs 40 miles (49) per week. Her average mile gain has been 2 miles per week. Write an equation that models Joyce’s weekly mileage m in terms of the number of weeks w that she stays
in the program. When will Joyce jog over 60 miles?
*19. Verify Verify that 221 is an outlier for the following data set that shows the
(54) number of dollars individuals have in a savings account.
143, 95, 116, 169, 146, 131, 144, 150, 191, 127, 162, 221, 150
20. Multiple Choice What is the upper extreme in the box-and-whisker plot? (54)
Running Rate in mph
345678
A 5 B 6 C 7 D There is none.
*21. Basketball At the beginning of the third quarter of a basketball game, Stephen (55) had 16 points and Robert had 14 points. During this quarter Stephen only
attempted 2-point shots and Robert only attempted 3-point shots. For every shot Stephen made, Robert made a shot. At the end of the third quarter, they were tied.
a. Write a system of linear equations to represent the total points earned by each
player by the end of the third quarter. Let x be the number of shots that were made and y be the total number of points.
b. How many shots would each player have to make so that the game would be tied?
c. How many points had each player earned by the end of the third quarter?
Lesson 57 373