Solve for the given letter.-7k + ar = r - 2y for r
A. r = 
B. r = 
C. r = 
D. r = 
Answer: C
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Solve the equation.
= 
A. ?
B. 
C. 
D. 
A drug is carried into an organ of volume 
cm3 by a liquid that enters the organ at the rate of a cm3/sec and leaves it at the rate of b cm3/sec. The concentration of the drug in the liquid entering the organ is c g/cm3. If the concentration of the drug in the organ at time 
is increasing at the rate of
?
?g/cm3/sec, and the concentration of the drug in the organ initially is 
g/cm3, show that the concentration of the drug in the organ at time 
is given by
?
What will be an ideal response?
Use the quadratic formula to solve the equation.x2 - 14x + 85 = 0
A. {7 - 36i, 7 + 36i} B. {7 - 6i, 7 + 6i} C. {7 + 6i} D. {1, 13}
Determine whether the equation is an identity. If it is an identity, prove it.tan2 x = sec2 x + sin2 x - cos2 x
What will be an ideal response?