Which of the pictures does not illustrate a line of symmetry? Answer A, B, Both A and B, or Neither.
?
(A) 
(B) 
What will be an ideal response?
Answer: A
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Solve the problem.A certain electronic air cleaner is capable of filtering x liters of air per second and the percentage of the contaminants that are removed from the air may be calculated by 
where 
(i) Graph f in [0, 85, 5] by 
(ii) Use the intersection-of-graphs method to estimate the x-values where 75% to 90% of the pollutants are removed.
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A. 
75% to 90% are removed when
about 42 to 50 liters of air are
filtered.
B. 
75% to 90% are removed when
about 25 to 30 liters of air are
filtered.
C. 
75% to 90% are removed when
about 35 to 43 liters of air are
filtered.
D. 
75% to 90% are removed when
about 26 to 31 liters of air are
filtered.
Use the prime factorization method to find the LCM of the variable expressions.15mn and 25m2n
A. 375m2n B. 75mn C. 75m2n D. 375mn
For the given functions f and g, find the requested composite function value.f(x) = 7x + 6, g(x) = 2/x;
Find (g ? f)(3).
A. 
B. 
C. 
D. 18
Solve the problem.y varies directly as x and inversely as the square of z. y = 110 when x = 90 and z = 3. Find y when x = 100 and z = 10.
A. 11 B. 110 C. 1358.02 D. 36.67