Page 461 - Algebra 1

Lesson Practice
a. What is the probability of rolling either a sum of 2 or a sum of 10 using
(Ex 1)
two number cubes?
b. What is the probability of rolling at least one even number or a sum of
(Ex 2)
3 using two number cubes?
c. A digital music player randomly selects a song from a group of 12 rock,
(Ex 3)
d. Angelina uses Briceson’s data from Example 3. She is planning to call
(Ex 4)
12 pop, 5 country, and 3 alternative artists. What is the probability that the music player selects either a rock or alternative song?
200 people from Wyoming. She assumes that 10,000 of the people who are 75 or older are also employed.
How many people would Angelina expect to call that are either employed or are 75 or older?
Total Population
Employed People
People 75 and Older
510,000
291,000
29,000
Practice
Distributed and Integrated
Determine the degree of each polynomial.
1. 14x2y3z4 2. 12q2r + 4r - 10q2r6
(53) (53)
Simplify.
3. 5x4z3 + 4xz (53)
__ 4. √ 1 5. √ 4
(61) 48 (61) 25x
Tell whether each of the following equations shows inverse variation. Write “yes” or “no”.
6. y=_5 (64) x
Solve each inequality. 8. x+1>1.1
(66)
7. y=_1x (64) 2
9. x-2.3≤7.6 (66)
Find the probability of the following events.
*10. rolling a sum of 7 or a sum of 11 with two number cubes
(68)
*11. rolling a sum of 1 or a sum of 13 with two number cubes (68)
12. Probability A caterer is sorting silverware. There are 75 knives, 50 forks, and
(7)
4
75 spoons. Twenty of the forks and 30 of the spoons have red handles. If a piece of silverware is chosen at random, what is the probability that it will be a fork or have a red handle? Write and solve an expression to find the probability.
446 Saxon Algebra 1