Let z vary jointly with x and y. Find the constant of variation k. Then, use 
to find z when x = 5 and y = 7.z = 69,020 when x = 58 and y = 119
A. k = 
; z = 350
B. k = 10; z = 350
C. k = 10; z = 120
D. k = 
; z = 120
Answer: B
Mathematics
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, - 
B. 0
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, -
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A. -226.06 B. 0.19 C. -225.95 D. 0.30
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A. {
}
B. {7, -7}
C. no real solution
D. {
, -
}
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