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3. y varies directly as x and inversely as z. If y = 5 when x = 3 and z = 4, find y when x = 6 and z = 8. 4. y varies directly as x2 and inversely as z. If y = 12 when x = 2 and z = 7, find y when x = 3 and z = 9.

3. y varies directly as x and inversely as z. If y = 5 when x = 3 and z = 4, find y when x = 6 and z = 8. 4. y varies directly as x2 and inversely as z. If y = 12 when x = 2 and z = 7, find y when x = 3 and z = 9.

Advanced Engineering Mathematics
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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Please help me answer number 3 and 4 with complete solution

Combined Variation 1. y varies jointly as x and z. If y = 5 when x = 3 and z = 4, find y when x = 6 and z = 8. 2. y varies jointly as x and z. If y = 12 when x = 4 and z = 3, find y when x = 9 and z = 8. 3. y varies directly as x and inversely as z. If y = 5 when x = 3 and z = 4, find y when x = 6 and z = 8. 4. y varies directly as x2 and inversely as z. If y = 12 when x = 2 and z = 7, find y when x = 3 and z = 9. 5. A varies jointly as b and h. If A = 16 when b = 2 and h = 8, find A when b = 8 and h = 16.
Transcribed Image Text:Combined Variation 1. y varies jointly as x and z. If y = 5 when x = 3 and z = 4, find y when x = 6 and z = 8. 2. y varies jointly as x and z. If y = 12 when x = 4 and z = 3, find y when x = 9 and z = 8. 3. y varies directly as x and inversely as z. If y = 5 when x = 3 and z = 4, find y when x = 6 and z = 8. 4. y varies directly as x2 and inversely as z. If y = 12 when x = 2 and z = 7, find y when x = 3 and z = 9. 5. A varies jointly as b and h. If A = 16 when b = 2 and h = 8, find A when b = 8 and h = 16.
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