Page 178 - Algebra 1

16. Justify What is the first step in solving 0.35 + 0.22x = 1.67? (24)
*17. Phone Charges The length of the first ten calls Tyrese made one month were 13, 28, (22) 6, 10, 13, 22, 31, 12, 2, and 9 minutes. In a stem-and-leaf plot of the data which
digit would appear the most in the leaves column?
18. Verify Show that -_3 x = 12 and _5 x = -2 _1 have the same solution.
(21) 4 32 2
19. Graph the ordered pair (-1, 0) on a coordinate plane.
(20)
Measurement To measure the length of a steel rod, an engineer uses a reference (19) point a few millimeters from the end of the ruler. She then subtracts this
reference point from her final measurement of 325 mm. If the rod’s length is 318 mm, what reference point did she use?
21. Convert 37 American dollars to Indian rupees. (Hint: 1 rupee = $0.025) (8)
22. Statistics Absolute deviation is the absolute value of the difference between a
(5) value in a data set and the mean of the data set. For the data set {8, 9, 11, 12, 15},
the mean is 11, so the absolute deviation for the value 15 is |15 - 11| = |4| = 4. What is the absolute deviation for each of the other numbers in the above data set?
23. Fundraising The cheerleaders made $3 profit on each item sold in a fundraiser. (15) They sold x calendars and y candles in total. Write and simplify an algebraic
expression to find the total profit.
24. Write A coin is tossed 8 times. What is the probability that the next time the coin
(14) is tossed the result will be heads? Explain. 25. Simplify 11 · 3 + 7.
(4)
26. Multi-Step A vending machine has q quarters and d dimes.
(9) a. Write an expression with variables to represent the value of the money.
b. Find the value of the change in the machine if there are 21 quarters and 13 dimes.
_1 _1 _2 _1 _1 _2 27. Use <, >, or = to compare the expressions. 3 + 5 · 15 (3 + 5 ) · 15
(7)
28. Write A man runs up and down stairs. If the number of stairs he runs up plus the (6) number of stairs he runs down is the total number of stairs, describe his position
at the end of his run.
29. Write Show the steps for simplifying 10 · 42 + 72 ÷ 23.
(4)
30. Accounting Accountants prepare financial reports for businesses. Identify the set (1) of numbers that best describes the numbers in a financial report. Explain your
choice.
3 4 20.
Lesson 27 163