7. W varies directly as the square of x and inversely as y and z. If w = 12 when x = 4, y = 2 and
Z=20, find w when x = 3, y = 8 and z= 5.
a. 10
b. 9
d. 25/3
y .
c. 27/4
8 If tuo
Z=20, find w when x = 3, y = 8 and z= 5.
a. 10
b. 9
d. 25/3
y .
c. 27/4
8 If tuo
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Answer:
7.W=kx^2/yz
12=k(4)^2/(2)(20)
12=16k/(2)(20)
12=2k/5
k=5/2×12
k=30
W=(30)(3)^2/(8)(5)
w=6*9/8
W=3*9/4
W=27/4