Page 88 - Algebra 1

24. Banking Frank deposited $104.67 into his bank account. Later that day, he spent
(5)
25. Justify Simplify 52 + (1 + 3)2 · (16 - 14 )3 - 20. Justify each step. (7)
26. Error Analysis Two students simplify the expression 2 + 3x + 1. Which student
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*27. Justify Arlene has 30 buttons and buys x packages of buttons. There are
$113.82 from the same account. Estimate the change in Frank’s account balance for that day.
is correct? Explain the error.
Student A
2 + 3x + 1
= 2 + 1 + 3x = (2 + 1) + 3x = 3 + 3x
Student B
2 + 3x + 1
= (2 + 3)x + 1 = 5x + 1
(12)
has is represented by the expression 30 + 7x - 12. Simplify the expression and
7 buttons in each package. She uses 12 buttons. The number of buttons she now justify each step using the properties.
28. Multiple Choice Which of the following expressions will result in a negative
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number? A (-6)2
B (-6) ÷ (-6) C -_3 (6) ÷ (-4)
4
D -1 · (-6)2
A Greek company needs to purchase some products from a U.S. corporation. First, the company must open an account in U.S. dollars. If the
account is to hold $1,295,800, how many drachma, the Greek currency, should the company deposit? Use the exchange rate of one Greek drachma for every $0.004 in U.S. currency.
30. Probability Describe each of the following events as impossible, unlikely, as likely as
(Inv 1)
29. International Banking
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not, likely, or certain.
a. Jim rolls a 10 on a standard number cube.
b. Sarah guesses a number correctly between 1 and 900. c. Mayra dropped a coin and it landed heads up.
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