Perform the indicated operation or operations, if possible.
- 
A. 
B. 
C. 
D. 
Answer: A
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Solve the equation for the indicated variable.Pco = 
Pm for y (partial pressure)
A. y = 
B. y = 
C. y = 
D. y = 
Write the first five terms of the arithmetic sequence with the first term a1 and common difference d. a1 = 
, d = 
A. 
, 
, 
, 
, 
B. 
, 
, 
, 
, 
C. 
, 
, 
, 
, 
D. 
, 
, 
, 
, 
Solve the problem.Arches in the shapes of parabolas are often used in construction. Find the equation of a parabolic arc that is 20 feet high at its highest point and 22 feet wide at the base, as illustrated in the figure. Place the origin at the midpoint of the base.
A. y = - 
x2 + 20
B. y = -x2 + 22
C. y = -x2 + 20
D. y = 
x2 + 20
Use U = universal set = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9}, A = {1, 2, 3, 5, 8}, B = {2, 3, 5, 7}, and C = {1, 4, 9} to find the set.B ? C
A. {1, 2, 3, 4, 5, 7, 9} B. {0} C. { } D. {1, 2, 3, 5, 7, 9}