After determining whether the variation model below is of the form 
or 
, find the value of k.
x
20
40
60
80
100
y
?
?
?
?
A. 
B. 
C. 
?
D. 
E. 
?
Answer: E
Mathematics
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Write the equivalent fractions with the least common denominator.
and 
and 
A. 
= 
; 
= 
; 
= 
B. 
= 
; 
= 
; 
= 
C. 
= 
; 
= 
; 
= 
D. 
= 
; 
= 
; 
= 
Mathematics
Solve the problem.Let f(n) = 
- 
. What is f(n) approximately equal to as n gets large?Hint: Compute various examples on your calculator.
A. 
B. 
C. 
D. 
Mathematics
Solve the problem.Suppose that the function y = f(x) is increasing on the interval (7, 9). Over what interval is the graph of 
increasing?
A. (3, 5) B. (28, 36) C. (11, 13) D. (7, 9)
Mathematics
Simplify the given expression. Write the answer with variables in alphabetical order and any constant term last.12 + 10t + 8
A. 10t - 20 B. 10t2 + 20 C. 10t + 20 D. 10t + 96
Mathematics