Algebra II Semester 2 Practice Final _18 Pages

ID: A
85. Find the real-number root.
− 125
3
343
25
a.
49
b. − 125
343
c. − 125
1029
d. − 5 7
86. Multiply and simplify if possible.
6 ⋅ 2
a. 2 3
b. 12
c. 3 2
d. not possible
87. Multiply and simplify if possible.
Ê
ˆ
7x x − 7 7
Ë
Á
¯
˜
a. x 7 − 49 x
b. 7x − 49x
c. x 7 − x 49
d. − 42x
88. Divide and simplify.
3
3
162
2
3
a. 3 3
3
b. 162
3
c. 3 3
d. 3 3
89. Divide and simplify.
90x 18
2x
a. 3x 8 5x
b. 18x 17
c. 5x 3x 8
d. none of these
90. Rationalize the denominator of the expression.
Assume that all variables are positive.
6x 8 y 9
a.
b.
5x 2 y 4
x 3 y 2
5
30y
30x 10 y 13
5x 2 y 4
c. 5x 3 y 2 30y
d. none of these
91. Rationalize the denominator of the expression.
Assume that all variables are positive.
3
2 + 3
a.
b.
c.
d.
3
6
3
2 6
3
2 36
3
2 6
3
2 36
3
+ 9 18
6
3
+ 3 2
6
3
+ 9 4
6
3
+ 3 4
6
92. Add if possible.
4
2 2x
4
a. 8 4x
4
+ 6 2x
4
b. 16 2x
4
c. 8 2x
d. not possible to simplify
93. Add if possible.
3
4 3x
3
a. 9 13x
3
b. 27 3x
3
+ 5 10x
c. 27 10x
3
d. not possible to simplify
14