Answer Key 217- −−
− ()⋅−
108 −( +
2=− −− ()
108 −(
2=− −−
1014
2
=− 10 −− 7
= − 10 + 7
=− 39.^7853
3236 12
(^2488) ⋅ 53
2 − ÷
− +
− ÷
49 85 ⋅ 81
32 ⋅ 36 12
=^49 −+^4081
63 −
90
3
= 30
- ()−
⎛ −
⎝⎜⎛⎛
⎝⎝⎞
⎠⎟⎞⎞
⎠⎠+
−625 576
146
3=()−⎛
⎝⎜⎛⎛
⎝⎝⎞
⎠⎟⎞⎞
⎠⎠+
−49
146
3=()− ⎛
⎝⎜⎛⎛
⎝⎝⎞
⎠⎟⎞⎞
⎠⎠+
−7
146
3=()− ⎛
⎝⎜⎛⎛
⎝⎝⎞
⎠⎟⎞⎞
⎠⎠+
−1
26
3
=− 3 − 2
= − 511.55
202=55 −
400=0
400
= 0- (12 − 5) − (5 − 12)
= 7 − (−7)
= 7 + 7
= 14
13.9 100 64
15+− 100
−−=
−93 + 6
15=
−96 +
15=
−15
15
= − 1- −8 + 2(−1)^2 + 6
= −8 + 2 ⋅ 1 + 6
= − 8 + 2 + 6
= 0
15.3
22
31
415
77
3⎛⎜⎛⎝⎝⎝⎛− ⎞⎞⎞⎠⎠⎠⎟− ()− 5 +−⎛⎝⎛⎛⎝⎝ ⎞⎠⎟⎞⎞⎠⎠=− 1 +−^5
45=− 6 + 1.25
= − 4.75Chapter 6 Algebraic Expressions
Exercise 6
- Name the variable(s) and constant(s) in the expression 2π r, where r is the measure
of the radius of a circle. Answer: The letter r stands for the measure of the radius