Determine whether the variation model is of the form 
or 
and find k. Then write a model that relates y and x.
x
4
8
12
16
20
y
1
A. 
B. 
C. 
D. 
E. 
Answer: C
Mathematics
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Solve the equation 
.
?
A. There is no solution.
B. 
C. 
D. 
Mathematics
Find the foci of the ellipse.49x2 + 16y2 = 784
A. (0, ±7)
B. (0, ±4)
C. (±
, 0)
D. (0, ±
)
Mathematics
Graph the function.y = cos 8x
A. 
B. 
C. 
D. 
Mathematics
Collect like terms.-8b + 4b
A. -4b B. -12b C. -4b2 D. 4b
Mathematics