Ch al l en g e Simplify each expression.- 3* • 32-jc • 3 2
- (a + b)2(a + by3
48. 2 ” • 2” +2 • 2
51. (f + 3)s(t + 3)s
49. 35 • V • 3 2 • 2X
52. 5X+1 • 51_JC - Nature A book shows an enlarged photo of a carpenter bee. A carpenter bee is
about 6X10 3 m long. The photo is 13.5 cm long. About how many times as long as
a carpenter bee is the photo?
St a n d a r d i z e d Test Pr ep
^AT/ACT 54. Whatisthe simplified form of ^2x2yij^4x«yej?
CD 6 x 2 yi CD 6 xy C O Sx^yl- What is the x-intercept of the graph of 5x - 3y = 30?
CD-10 CO-6 CD 6
8 x43/ 2CD 10
- At the Athens Olympics, the winning time for the women’s 100-m hurdles was
2.06 X 10 _1 min. Which number is another way to express this time in minutes?
CD 0.20620.6 CO 206 X 101 CO 206 X 10” - What is the solution of 4x - 5 = 2x + 13?
CD 3 © 4 ©9 CD 32
Ex t e n d e d
, R e s p o n s e
- Bill's company packages its circular mirrors in boxes with square bottoms, as
shown at the right. Show your work for each answer.
a. What is an expression for the area of the bottom of the box?
b. If the mirror has a radius of 4 in., what is the area of the bottom of the box?
c. The area of the bottom of a second box is 196 in.2. What is the diameter of the
largest mirror the box can hold?
Mixed Review
Solve each system.- 2x + 3y = 12
—3 x + y = —7
Se e Le sso n 6- 3.- 2x — y = — 3
x — y = 1
61. 2x + y = 15
21 X + y = 5
Find the third, seventh, and tenth terms of the sequence described by each rule. Se e Le sso n 4- 7.- A{n) = 10 + [n - 1)(4) 63. A(n) = -5 + {n - 1)(2) 64. A{n) = 1.2 + {n~ l)(-4)
Get Read y! To p r e p a r e f o r Le sso n 7 - 3 , d o Ex e r c i se s 6 5 - 6 8.
Simplify each expression. Se e Le sso n 7- 1.- ( —2)—4 66. 5xy° 67. 4m_ 1 n 2 68. —3x^y^z6
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