After determining whether the variation model below is of the form 
or 
, find the value of k.
x
154
161
168
175
182
y
66
69
72
75
78
A. 
B. 
C. 
?
D. 
E. 
Answer: D
Mathematics
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Find the inverse of the function.K = {(-6, -3), (3, 6), (-9, 7), (9, -7)}
A. K-1 = {(-7, -9), (-9, 3), (-3, -6), (7, 9)}
B. K-1 = {(-3, -6), (6, 3), (7, -9), (-7, 9)}
C. K-1 = {(-6, - 
), (3, 
), (-9, 
), (9, - 
)}
D. K-1 = {(-7, -9), (6, 3), (-3, 3), (7, 9)}
Mathematics
Solve the system of equations by the substitution method.
A. (7, 0) B. (0, 7) C. infinite number of solutions D. no solution
Mathematics
Simplify the expression 
as much as possible after substituting 
for x.
?
A. ?
B. ?
C. ?
D. ?
E. ?
Mathematics
Factor the difference of two squares.25 - 36x2
A. (5 + 6x)(5 - 6x) B. (5 + 6x)2 C. (5 - 6x)2 D. prime
Mathematics