Determine which fractions are proper.
, 
, 
, 
, 
A. 
, 
, 
, 
, 
B. 
, 
C. 
, 
, 
, 
D. 
, 
, 
Answer: B
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Find the extreme values of the function subject to the given constraint.
A. Maximum: none; minimum: 30 at 
B. Maximum: none; minimum: 24 at 
C. Maximum: 30 at 
minimum: 24 at 
D. Maximum: 51 at 
minimum: 30 at 
Find the product.(x + 12y)(x + 10y)
A. x2 + 22xy + 22y2 B. x2 + 22xy + 120y2 C. x2 + 19xy + 120y2 D. x + 22xy + 120y
Simplify the expression.(
+ 
)(
- 
)
A. 2 - 2
B. 2 - 8
C. 10
D. -6
Solve the problem.A chemist needs 50 milliliters of a 53% solution but has only 49% and 59% solutions available. How many milliliters of each should be mixed to get the desired solution?
A. 40 mL of 49%; 10 mL of 59% B. 20 mL of 49%; 30 mL of 59% C. 30 mL of 49%; 20 mL of 59% D. 10 mL of 49%; 40 mL of 59%