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Elementary and Intermediate Algebra
Mark Dugopolski, Southeastern Louisiana University
Real Numbers and Their Properties
Using the Properties to Simplify Expressions
Warm-Ups
1
3(x + 6) = 3x + 18
A)
TRUE
B)
FALSE
2
-3x + 9 = -3(x + 9)
A)
TRUE
B)
FALSE
3
-1(x - 4) = -x + 4
A)
TRUE
B)
FALSE
4
3a + 4a = 7a
A)
TRUE
B)
FALSE
5
(3a)(4a) = 12a
A)
TRUE
B)
FALSE
6
3(5 · 2) = 15 · 6
A)
TRUE
B)
FALSE
7
x + x = x
2
A)
TRUE
B)
FALSE
8
x · x = 2x
A)
TRUE
B)
FALSE
9
3 + 2x = 5x
A)
TRUE
B)
FALSE
10
-(5x - 2) = -5x + 2
A)
TRUE
B)
FALSE
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