Page 131 - Algebra 1

21. Analyze Use an example to show that the Associative Property holds true for (12) multiplication.
22. Statistics Use the data in the table to Deer Population (11) find the average yearly change in the
deer population during a five-year period.
23. Stocks A Stock Market Report shows the value of stocks in points. The value
(10) of the stock is determined by the number of points. If a stock is at 79_5 points and
it drops 3 points, what is the value of stock?
24. Nutrition One hundred grams of honey contains about 0.3 grams of protein. How
(8) many milligrams is 0.3 grams of protein?
Year
Decrease in Number of Deer
2000
10
2001
7
2002
9
2003
10
2004
12
7
25. Tiling A contractor lays patterned tile floors. He often begins with a polygon and (7) _
makes diagonal lines that pass from corner to corner of the polygon. He uses the 2
n -3n
following expression 2 , where n equals the number of sides of the polygon to
find the number of diagonal lines for any given polygon. a. Find the number of diagonals for a hexagon.
b. Model Check your work by drawing the diagonals in a hexagon.
26. Write and simplify a mathematical expression that shows “fourteen minus the
(4) quotient of three squared and the sum of three plus six.”
27. Verify Indicate whether each statement is true or false. If the statement is false, (2) explain why.
a. The coefficient of x in the expression x + 3 is 3. 2mn _2
b. The factors of the expression _5 are 5 , m, and n.
28. Name the coefficient(s), variables, and number of terms in the expression
(2) b2 - 4ac.
29. Multi-Step Pencils cost ten cents and erasers cost five cents.
(17) a. Write an expression to represent the total number of school supplies purchased. b. Write an expression to represent how much the supplies cost in cents.
*30. Analyze A person runs 5 miles per hour. The equation d = 5t tells how far the
(20) person has run in t hours. Make a table when t = 0, 1, 2, and 4 hours. Graph the
ordered pairs in a graph and connect all the points. What do you notice?
116 Saxon Algebra 1