Section R.2 Algebra Essentials
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Transcript of Section R.2 Algebra Essentials
Section R.2
Algebra Essentials
OBJECTIVE 1
(a) On the real number line, graph all numbers for which 1.
(b) On the real number line, graph all numbers for which > 2.
x x
x x
OBJECTIVE 2
(a) 4 (b) 6 (c) 0
Let , , and be points on a real number line with coordinates
4, 5, and 1 respectively. Find the distance
(a) Between and (b) between and
P Q R
P Q Q R
OBJECTIVE 3
Evaluate each expression is = 2 and = 4.
2(a) 2 4 (b) 3 (c) (d) 3 2
5 3
x y
xx y xy x y
y
OBJECTIVE 4
Find the domain of the variable in the expression
2
1
x
x
x
OBJECTIVE 5
3
6
2
(a) 4
(b)
2(c)
3
y
2 45 2 4
3 3
7
(a) (b) (c) 3
3(d) (e)
5
x x x x
x
x
OBJECTIVE 6
21(a) 49 (b) (c) 5.2
9
2 2 2(a) 4.5 (b) 4.5 (c) x
OBJECTIVE 7
6Evaluate: 3.45
OBJECTIVE 8
Write each number in scientific notation.
(a) 34562 (b) 23.45 (c) 0.488 (d) 0.0000067
6 3 2
Write each number as a decimal.
(a) 4.25 10 (b) 1.2 10 (c) 5 10