Page 430 - Algebra 1

Lesson Practice
a. Solve the system by elimination and check the answer. (Ex 1)
7x - 4y = -3 -3x + 4y = -1
Solve each system by elimination.
Hint
When solving exercises a–d, look for the easiest way to solve the system.
b.
(Ex 2)
c.
(Ex 3)
d.
(Ex 4)
e.
(Ex 5)
11x+6y=21 11x + 4y = 25
-2x+5y=6 6x - 2y = 34
-8x-3y=26 -5x - 2y = 16
A movie theater sells 540 tickets to a matinee showing of a new animated feature. A child matinee ticket costs $5.50 and an adult matinee ticket costs $6.00. If the movie theater made $3060 for that showing, how many adult tickets were sold?
Box Office Sales
Practice
Simplify.
1. √ 25 6
( ( 6 6 1 1 ) )
3. √ 29 4 (61)
Distributed and Integrated
4.
(4 0)
5. Sports A sports court has area (39)
(
- . Simplify.
t3n-2s t-2 ___
)
b
1450, 1500, 2800, 1630, 1500, 1710
7. Tell whether the set of ordered pairs (5, 12), (3, 7.2), and (7, 16.8) represents a
(56) direct variation. Find the LCM.
8. 2t3sv5, 6v3t4, and 10v8s4 (57)
9. 14dv3, 7s2v, and 28s7v5 (57)
10. Multiple Choice Which of the following polynomials is equal to (x + 5)(x - 5)? (60) A x2 -25 B x2 +25 C x2 -5x+25 D x2 -10x+25
*11. Landscaping Nasser wants to plant a 4-foot-high Yoshino Cherry tree near a (63) 7-foot-high Snowdrift Crabapple tree. If the cherry tree grows at a rate of
16 inches a year and the crabapple tree grows at a rate of 13 inches per year, when will the two trees be the same height?
f7tb5 ns
6. Find the range for these 6 house sizes in a neighborhood (in square feet):
(48)
2. √ 10 8
( ( 6 6 1 1 ) )
_ _1 2 r-3t2e
3
(
_3 42
)
rg t f6t-1
Lesson 63 415