By Berchie Holliday, Gilbert J. Cuevas, Beatrice Luchin, Ruth M. Casey, Linda M. Hayek, John A. Carter, Daniel Marks, Roger Day, Carol E. Mallory, Viken Hovseplan

This system scholars want; the point of interest lecturers wish! Glencoe Algebra 1 is a key software in our vertically aligned highschool arithmetic sequence constructed to aid all scholars in achieving a greater figuring out of arithmetic and increase their arithmetic rankings on today’s high-stakes tests.

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Include an expression for the cost of service if Nicole has a coupon for $25 off her base rate for her first six months. 48. Simplify: [10 + 15(2 3)] ÷ [7(2 2) - 2] 47. REVIEW What is the perimeter of the triangle if a = 9 and b = 10? Ó>Ê ä°xL ÓÊ xAÊÊ£® Step 1 [10 + 15(8)] ÷ [7(4) - 2] Step 2 [10 + 120] ÷ [28 - 2] Step 3 130 ÷ 26 Step 4 _1 5 A 164 mm Which is the first incorrect step? B 114 mm F Step 1 C 28 mm G Step 2 D 4 mm H Step 3 J Step 4 Write an algebraic expression for each verbal expression.

_ 14 18 4 _ 69. _ ·3 9 7 2 _ 72. _ ·3 5 4 20 Chapter 1 The Language and Tools of Algebra 5 _ 70. _ · 15 6 16 11 _ 73. _ ·4 12 5 1-4 Identity and Equality Properties Main Ideas During the college football season, teams are ranked weekly. The table shows the last three rankings of the top five teams for the 2005 football season. The open sentence below represents the change in rank of Texas from Week 6 to Week 7. • Recognize the properties of identity and equality. • Use the properties of identity and equality.

Thus, 0 is called the additive identity. Additive Identity Words For any number a, the sum of a and 0 is a. Symbols a + 0 = a, 0 + a = a Examples 5 + 0 = 5, 0 + 5 = 5 There are also special properties associated with multiplication. Consider the following equations. 7·n=7 The solution of the equation is 1. Since the product of any number and 1 is equal to the number, 1 is called the multiplicative identity. 9·m=0 The solution of the equation is 0. The product of any number and 0 is equal to 0. This is called the Multiplicative Property of Zero.