Page 474 - Algebra 1

Lesson Practice
Solve, graph, and check the solution for each inequality.
-x _1 _
a.n<2 (Ex 1) 3
c. 6w ≤ 57 (Ex 3)
b. <8 (Ex 2) 4
d. _1 ≥ -4a (Ex 4) 2
e. Barney earns a 4% commission on what he sells. How much does he
(Ex 5)
need to sell to earn at least a $750 commission every month?
Practice
Distributed and Integrated
Find the probability of the following events.
1. tossing a coin heads-up or rolling a 3 with a number cube
(68)
2. tossing a coin tails-up or rolling a number less than 4 on a number cube (68)
3. tossing a coin tails-up and rolling a number greater than 6 on a number cube (33)
Solve the inequality. 4.y-2<_1
5. y+_3<_1 (66) 2 4
7. √ 3x + 2√ 3x (69)
(66)
Add. *6.
(69)
8.
(64)
9.
(70)
*10.
(54)
11.
(54)
*12.
(55)
2 18√ 3y + 8√ 3y
Write an inverse variation equation relating x and y when x = 18 and y = 4.5. Determine if the inequality symbol needs to be reversed, and then solve.
-2a ≥ -5
A team scores 56, 42, 60, 43, 51, 22, 44, 55, and 49 points.
a. Identify any outliers.
b. On the same screen of the graphing calculator, make one box-and-whisker plot of these data without identifying any outliers, and make another box-and-whisker plot that does identify any outliers.
c. How many points would you expect the team to score in the next game? Explain your answer.
Ages The ages at a family party are recorded.
5, 30, 33, 42, 36, 40, 1, 44, 29, 61, 82, 63, 29, 38, 6, 11
Make a box-and-whisker plot of these ages and determine if there is an outlier.
Use the graphing calculator to determine the solution to the following system. x + y = -2
y = 4x - 7
Lesson 70 459