Transcript Section R.2 Algebra Essentials OBJECTIVE 1 (a) On the real number line, graph all numbers x for which x  1. (b)

Section R.2
Algebra Essentials
OBJECTIVE 1
(a) On the real number line, graph all numbers x for which x  1.
(b) On the real number line, graph all numbers x for which x > 2.
OBJECTIVE 2
(a) 4
(b) 6
(c) 0
Let P, Q, and R be points on a real number line with coordinates
4, 5, and  1 respectively. Find the distance
(a) Between P and Q
(b) between Q and R
OBJECTIVE 3
Evaluate each expression is x =  2 and y = 4.
(a) 2 x  4 y
(b)  3 xy
2x
(c)
5  3y
(d) 3 x  2 y
OBJECTIVE 4
Find the domain of the variable x in the expression
x2
x 1
OBJECTIVE 5
(a) 4
3
(b) y 6
2
(c)  
3
2
(a) x  x
5
3
(d)  
5
2
3
(b)
x 
4 2
(c)
x 3
(e) 7
x
 3x 
4
OBJECTIVE 6
(a)
49
(b)
1
9
(c)

5.2

2
(a)
 4.5
2
(b)
 4.5
2
(c)
x2
OBJECTIVE 7
Evaluate:
 3.45
6
OBJECTIVE 8
Write each number in scientific notation.
(a) 34562
(b) 23.45
(c) 0.488
(d) 0.0000067
Write each number as a decimal.
(a) 4.25 10
6
(b) 1.2 10
3
(c) 5 10
2