Exercises with Answers
Exercises with Answers
Exercises with Answers
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544 Chapter 5 Quadratic Functions<br />
5.6 <strong>Answers</strong><br />
1.<br />
3.<br />
5.<br />
7.<br />
9<br />
4<br />
(<br />
− 1 )<br />
6 , −71 12<br />
11<br />
4<br />
(<br />
− 1 2 , 33 )<br />
4<br />
37.<br />
a) R = (−1/3)x 2 + 40x<br />
b) x = 60 objects<br />
c) p = 20 dollars<br />
d) R = $1200<br />
39. x = −b/(2m), y = b/2, A = −b 2 /(4m)<br />
9. − 81 4<br />
11.<br />
13.<br />
(<br />
−∞, 10 ] {<br />
= x<br />
3 ∣ x ≤ 10 }<br />
3<br />
[<br />
− 209 ) {<br />
}<br />
16 , ∞ = x<br />
∣ x ≥ −209 16<br />
15. x = − 1 4<br />
17. 0.25<br />
19. 335.25<br />
21. 10 and 10<br />
23. 6 and −6<br />
25. 3/2 and −3/4<br />
27. −5, −5<br />
29. 7, 7<br />
31. 10 feet by 10 feet<br />
33. 361250 square meters<br />
35. 200<br />
Version: Fall 2007