kenneyfamily
y varies jointly as x and z and inversely as the square of w. y = 3 when x = 3, z = 10, and w = 2. Find y when x = 4, z = 20, and w = 4.



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kenneyfamily
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@Skaematik

Skaematik
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so y is directly proportional to x and z,
y is inversely proportional to square of wdw:1353303106192:dw

kenneyfamily
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a. y = 2
b. y = 1
c. y = 8
d. y = 4

kenneyfamily
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hmm

Skaematik
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did you find k

kenneyfamily
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is it 4?

kenneyfamily
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@Skaematik

Skaematik
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its 2

kenneyfamily
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but then y=10 right? thats not a choice :(

Skaematik
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ah whoops, i meant y=2.
k = 0.4

kenneyfamily
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thanks!