Simplify each expression. 11. ANSWER: 12. ANSWER: 13. ANSWER: 14. ... Study Guide and Review - Chapter 8 ... GEOMETRY A triangle has an area of 3x. 2...
Study Guide and Review - Chapter 8 Simplify each expression.
11.
ANSWER:
12.
ANSWER:
13.
ANSWER:
14.
ANSWER:
15.
ANSWER:
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16. GEOMETRY A triangle has an area of 3x + 9x – 54 square centimeters. If the height of the triangle is x + 6 centimeters, find the length of the base.
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ANSWER: Study Guide and Review - Chapter 8
15.
ANSWER:
2
16. GEOMETRY A triangle has an area of 3x + 9x – 54 square centimeters. If the height of the triangle is x + 6 centimeters, find the length of the base.
ANSWER: 6x –18 cm
Simplify each expression.
17.
ANSWER:
18.
ANSWER:
19.
ANSWER:
20. eSolutions Manual - Powered by Cognero
ANSWER:
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Guide and Review - Chapter 8 Study
20.
ANSWER:
21.
ANSWER:
22.
ANSWER:
23. GEOMETRY What is the perimeter of the rectangle?
ANSWER:
39. If a varies directly as b and b = 18 when a = 27, find a when b = 10.
ANSWER: a = 15
40. If y varies inversely as x and y = 15 when x = 3.5, find y when x = –5.
ANSWER: y = –10.5
Manual - Powered by Cognero eSolutions 41. If y varies inversely as x and y = –3 when x = 9, find y when x = 81.
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ANSWER: a =Guide 15 and Review - Chapter 8 Study
40. If y varies inversely as x and y = 15 when x = 3.5, find y when x = –5.
ANSWER: y = –10.5
41. If y varies inversely as x and y = –3 when x = 9, find y when x = 81.
ANSWER:
42. If y varies jointly as x and z, and x = 8 and z = 3 when y = 72, find y when x = –2 and z = –5.
ANSWER: y = 30
43. If y varies jointly as x and z, and y = 18 when x = 6 and z = 15, find y when x = 12 and z = 4.
ANSWER:
44. JOBS Lisa’s earnings vary directly with how many hours she babysits. If she earns $68 for 8 hours of babysitting, find her earnings after 5 hours of babysitting.
ANSWER: $42.50
Solve each equation or inequality. Check your solutions.
45.
ANSWER:
46.
Manual - Powered by Cognero eSolutions ANSWER: x = 13
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ANSWER:
Study Guide and Review - Chapter 8 46.
ANSWER: x = 13
47.
ANSWER: x = –7
48.
ANSWER:
49.
ANSWER: x =8
50.
ANSWER: x <1
51.
ANSWER:
52. YARD WORK Lana can plant a garden in 3 hours. Milo can plant the same garden in 4 hours. How long will it take Page 5 them if they work together?
eSolutions Manual - Powered by Cognero
ANSWER: Study Guide and Review - Chapter 8
52. YARD WORK Lana can plant a garden in 3 hours. Milo can plant the same garden in 4 hours. How long will it take them if they work together?
