Page 588 - Algebra 1

Lesson Practice
Factor completely. Check your answer. a. 3y2 +6yz+4y+8z
(Ex 1)
b. 3y2 -4y3 +3-4y (Ex 2)
c. 99x3y - 33x3 + 33x2y - 11x2 (Ex 3)
d. 3a2b - 4ab + 20- 15a (Ex 4)
Factor each trinomial by grouping.
(Ex 5)
e. x2 -4x-77
f. 6a2 -1a-15
Practice
Distributed and Integrated
Factor.
1. x2 +3xy-54y2
(72)
Solve.
3. 2g + 9 - 4g < 5 + 6g - 2
(81)
*2. 64a2b-16a3 +18a2b-9 (87)
4. 6(k - 5) > 3k - 26 (81)
Use an equation to find the probability of the event.
5. rolling 4 on two number cubes and a coin landing on heads
(8 0)
6. rolling a number less than 4 on two number cubes and a coin landing on heads (8 0)
Determine whether the polynomial is a perfect-square trinomial or a difference of two squares. Then factor the polynomial.
7. 100-c6 8. 4x2 +20x+25 (83) (83)
Find the distance between the given points. Give the answer in simplest radical form.
9.
(86)
11.
(71)
12.
(71)
(1, 3) and (4, 7) *10. (2, -1) and (6, 3) (86)
Which situation would most likely be represented by a negative correlation: hours of practice and your golf score, hours of practice and the number of baskets you make in basketball, or hours of practice and the cost of a computer? Hint: In golf, the lower the score, the better.
Entertainment The table shows the average ticket price for a movie. Make a scatter plot from the data.
Year
1990
1995
2000
2001
2002
2003
2004
2005
Ticket Price (dollars)
4.23
4.35
5.40
5.65
5.80
6.03
6.21
6.41
Lesson 87 573