Page 171 - Algebra 1

*3. Multiple Choice Which one of the expressions below can be simplified by combining
(18)
A 6(5x+1) B 2x(3+8)
C 7x+5 D 9x-6y+4
4. A table shows temperature changes over a period of a week.
(22)
*5. DigitalTechnology Theaveragesizeforthememorystorageofanmp3playeris
(26) 2 gigabytes (GB). The average size of an mp3 song is 5.5 megabytes (MB). About
how many songs can you store on a 2-gigabyte player if the player requires 16 megabytes for its own use? (Hint: 1gigabyte = 1024 megabytes)
*6. Write Describe two different methods for solving 12(x + 7) = 96. (26)
*7. Justify Solve -5(3x - 7) + 11 = 1. Justify each step with an operation or property. (26)
*8. Verify Draw the graph of a function. Check to see if your graph is truly a function. (25)
*9. Use the graph. Determine whether the relation is a function. (25)
like terms?
a. Why would a circle graph inaccurately display the data? b. Which type of graph would best display the data?
10. Solve 0.4m + 2.05 = 10.45. (24)
11. Error Analysis Two students solved 0.4x - 0.08 = 6.32. Which student is correct?
(24)
Explain the error.
Student A
0.4x - 0.08 = 6.32 10(0.4x) - 100(0.08) = 100(6.32)
4x - 8 = 632 _+_8 _+_8 4x = 640
4x = 640 __
44 x = 160
Student B
0.4x - 0.08 = 6.32 100(0.4x) - 100(0.08) = 100(6.32)
40x - 8 = 632
_+_8 _+_8
40x = 640
40x = 640 __
40 40 x = 16
12. Verify Is x = 8 a solution for 7x - 12 = 44? Explain. If false, provide a correct
(23)
solution and check.
156 Saxon Algebra 1
y
8
4
O
x
-8
-4
-4
4
8
-8