Test 3 Mat 1101 Exponent Worksheet With Answer Key - 2009
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1
2Test 3
MAT 1101
Summer 2009
Name ________________________
Simplify all answers and show your work!
1 ) Exponents are a shortcut for repeated __multiplication________________________________.
2) When we have a variable with an exponent raised to another exponent, what do we do with those
4
2
exponents? (Ex: (x
)
)____Multiply them.______________________________________________.
3) To add and subtract fractions, they must have a _common denominator_.
4) Why can we not simplify 6x + 7y any further? _____They’re not like terms.______________
2
2
2
5) Combine like terms: 7x
+ 2x + 5x
– 6 + 8x + 9
12x
+ 10x + 3
3
3
2
2
6) Add: (8x
– 2x + 2) + (3x
+ 6x – 4)
7) Subtract: (10x
+ 5x + 8) – (7x
– 11x + 10)
3
2
11x
+ 4x – 2
3x
+ 16x – 2
Simplify the following:
5
3
−
−
36
x
y
9
10
14
6
7
3
−
−
−
8)
9)
10)
4 (
)
•
•
y
y
y
x
y
7
4
−
16
x
y
18
y 9
x
5
y
12
21
x 4
64
y
2
3
4
9
3
−
x
y
3
– 2
4
– 4
11)
25
2
12) 3
• 4
• 4
• 3
13)
3
5
x
y
1
16
2
8
9x
y
125
3
Multiply the following:
6
3
4
7
2
5
3
2
14) 5xy
(3x
y
– 6x
y
+ 4x
y
)
15) (6x – 7)(2x + 1)
16) (2x – 5)(x
– 9x – 3)
4
10
8
8
6
9
2
3
2
15x
y
– 30x
y
+ 20x
y
12x
– 8x – 7
2x
– 23x
+ 39x + 15
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