Page 569 - Algebra 1

Find the probability of the following events. 8. spinning a blue section or a letter B
(68)
9. spinning a gray section or a letter D (68)
10. spinning a white section or a letter C (68)
C B
A
D
D
C
A
B
A B
11. Computer Electronics The failure rate for desktop computers is 5% for the first year (68) of use. For notebooks it is 15%. If you purchase both a new computer and a
notebook, what is the probability that either one will fail in the first year?
12. Multi-Step Use the scatter plot.
(71) a. Using two points on the line, find an equation for the trend
line.
b. Does the graph show a positive correlation, a negative correlation, or no correlation?
13. Entertainment People are often employed by amusement parks to
(74) predict the ages and weights of patrons. For a fee, one guesser claims
700 600 500 400 300 200 100
0 1
2
3
4 5
Day
6 7 8
she can predict a patron’s weight within three pounds of the correct
weight. If the guess is incorrect, the patron receives a prize. Write and solve an absolute-value equation for the maximum and minimum values of a correct guess for a person weighing 162 pounds.
14. Multi-Step The success rate on an exam is represented by 72x2 - 156x + 72. (79) a. Evaluate the expression for x = 2.
b. Factor the expression completely. 15. Verify Show that √ 14 · √ 21 = 7√ 6.
__ 16. Find the vertical asymptote: y = 1.6 .
(76)
(78) x + 2.5 + 7.8
17. Baseball A pop fly is hit into the infield. In the expression -5t2 + 40t - 35, (79) t represents the time that the ball was 37 meters high. Factor the expression
completely.
18. One student is selected from a school committee that has 12 seniors, 8 juniors,
(80) 10 sophomores, and 4 freshmen. Make a graph showing the frequency distribution. 19. Data Analysis Use the frequency distribution from the table to make a bar graph.
(8 0)
*20. The value of a varies jointly with b and c. What is the constant of variation if
(Inv 8)
21.
(81)
a = 18, b = 2, and c = 3? Write an equation expressing the given relationship. Model Graph the solution for 2(x + 9) - 14 > 3x + 7 + 2x.
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Saxon Algebra 1
Pasta Salad
Cucumber Salad
Caesar Salad
Carrot Salad
Number
12
16
22
10
Sales (dollars)