Solve the problem.A water tank can be filled in 9 minutes and emptied in 10 minutes. If the drain is accidentally left open when the tank is being filled, how long does it take to fill the tank?
A. 90 min
B. 
min
C. 
min
D. 
min
Answer: A
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Provide an appropriate response.Equating the numerators in the process of partial fraction decomposition, your friend has obtained the algebraic expression 
From this equation, what can you say about the original expression?
A. The original expression has a numerator of (7x - 3)(3x - 8)(x + 5)(x + 5). B. The original expression has a non-reducible quadratic factor in the denominator. C. The original expression has the factor (x2 + 5) in the denominator. D. The original expression has a repeating linear factor in the denominator.
Solve the problem.A loaf of bread is removed from an oven at 
and cooled in a room whose temperature is 
. If the bread cools to 
in 20 minutes, how much longer will it take the bread to cool to 
A. 14 min B. 15 min C. 34 min D. 24 min
Solve the problem.Let u = 
, v = 
. Find u - v.
A. 
B. 
C. 
D. 
Multiply. Write the answer in simplest form.40 ? 
A. 25
B. 
C. 20
D. 