If y varies inversely as x and y =2 when x =- 7, find k. Α. 10 В. -10 С.-12 D.-14

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
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Number 17-20 

16. If y varies jointly as x and z, find y if x= 2 , k=-5 and z = -3
В. 10
17. If y varies inversely as x and y = 2 when x=- 7, find k.
В. -10
С. -10
D. -30
А. 30
С-12
D.-14
A. 10
18. What is the simplified answer of - 4 ?
А. 8
19. The heat (H) in
Find k when H= 9 and I= 3.
С.6
D. -8
В.- 6
copper wire varies directly as the square of the electric wire (I).
А. 3
В. 1
С. -1
D. -3
20. What is the equivalent of (2 x²y')½ in radical form?
С.
А.
B.
D.
Transcribed Image Text:16. If y varies jointly as x and z, find y if x= 2 , k=-5 and z = -3 В. 10 17. If y varies inversely as x and y = 2 when x=- 7, find k. В. -10 С. -10 D. -30 А. 30 С-12 D.-14 A. 10 18. What is the simplified answer of - 4 ? А. 8 19. The heat (H) in Find k when H= 9 and I= 3. С.6 D. -8 В.- 6 copper wire varies directly as the square of the electric wire (I). А. 3 В. 1 С. -1 D. -3 20. What is the equivalent of (2 x²y')½ in radical form? С. А. B. D.
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