Algebra and Trigonometry 8th Edition Aufmann Solutions Manual
Algebra and Trigonometry 8th Edition Aufmann Solutions Manual
Algebra and Trigonometry 8th Edition Aufmann Solutions Manual
2 x2 - 3 y = 4
?
2(1) 2 - 3(-1) = 4
?
2 + 3= 4
3. a. Find the decrease: The average debt decreased 5 = 4 False
between 2006 and 2007, and 2008 and 2009. (1,–1) is not a solution.
b. Find the average debt in 2011: 7. Determine whether the ordered pair is a solution
Increase between 2009 to 2010: 22.0 20.1 1.9 y = 3x 2 - 4 x + 2
Then the increase from 2010 to 2011: ?
17 = 3(-3) 2 - 4(-3) + 2
22.0 1.9 23.9 , or $23,900. ?
17 = 27 + 12 + 2
4. a. When the cost of a game is $22, 60 million games
17 = 41 False
can be sold.
(–3, 17) is not a solution.
b. The projected numbers of sales decreases as the
8. Determine whether the ordered pair is a solution
price of this game increases.
c. .Create a table and scatter diagram: x 2 + y 2 = 169
?
p R = p⋅N (-2) 2 + (12) 2 =169
8 8 ⋅80 = 640 ?
4 + 144 =169
15 15⋅ 70 = 1050
148 = 169 False
22 22 ⋅ 60 = 1320
27 27 ⋅ 50 = 1350 (–2, 12) is not a solution.
31 31⋅ 40 = 1240 9. Find the distance: (6, 4), (–8, 11)
34 34 ⋅ 30 = 1020 2 2
d = (-8 - 6) + (11- 4)
36 36 ⋅ 20 = 720
37 37 ⋅10 = 370 = (-14)2 + (7)2
= 196 + 49
d. The revenue increases to a certain point and then
= 245
decreases as the price of the game increases.
=7 5
= 89 = a 2 + b2
14. Find the distance: (0, 0), (5, 13) 19. Find the distance: (x, 4x), (–2x, 3x)
d = ( 12 - 3)2 + ( 27 - 8)2 20. Find the distance: (x, 4x), (–2x, 3x)
= 3 + (27 -12 6 + 8) = 9 x2 + x2
= 3 + 27 -12 6 + 8 = 10 x 2
(
= - 10.6 , 4.4
2 2 ) x y
0 -4
= (-5.3, 2.2)
2 -2
4 0
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