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Solutions to Practice Exam 2:
1. a. 64
b. 16
1
x10
c.
1
8
c.
a 9b15
8
d.
16
81
d.
x10
4 y2
2. a. 1
b.
3. a. 12 x 5 y 5
b.  8 x 3 y 4
c. 7 x 5  9
d. 3x 2  x 
f. 3x  12
g.  y  14
j. 25x 2  9 y 2
h.
e.  3x 2  6 x  20
i. 9 x 2  30 x  25
4. a.
b. 7 x 3  2 x 2  8 x  2 
x  13
5. a. 1.357 (109 )
b. 6.2 (106 )
6. Area = 2 x 2  2 x  12
Perimeter = 6 x  2
7. a. 2 xx  2x  2
c. 4 x  3x  5
b.
d.
8. a.
3, 4
1
 1
d.  , 0, 
2
 2
 9
b. 0, 
 4
e.
 12,  4
18
x4
x  3x  8
 m  2 (t  x)
c.
6, 2
 5 
f.  , 0
 4 
9. The number is 0 or 6.
10. The whole numbers are 9 and 11.
11. length is 14 inches
12. The lengths of the legs are: 9 centimeters and 12 centimeters
4
x3
x 2  2 x  24
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