Solve the equation by the method of your choice. Simplify irrational solutions, if possible.x2 + 18x + 66 = 0
A. {-18 ± 
}
B. {-9 ± 
}
C. {9 ± 
}
D. {9 ± 
}
Answer: B
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Solve the problem.A tank contains 100 gal of fresh water. A solution containing 2 lb/gal of soluble lawn fertilizer runs into the tank at the rate of 1 gal/min, and the mixture is pumped out of the tank at the rate of 
Find the maximum amount of fertilizer in the tank and the time required to reach the maximum.
A. 48 pounds, 40 minutes B. 60 pounds, 40 minutes C. 50 pounds, 50 minutes D. 48 pounds, 60 minutes
Rewrite the fraction in simplest form.
A. 
B. 
C. 
D. 
Write in terms of the cofunction.sin 47°
A. cos 43° B. cos 47° C. cot 43° D. tan 43°
Graph the function, showing all asymptotes (those that do not correspond to an axis) as dashed lines. List the x- and y-intercepts.f(x) = 
A. x-intercept: 
, no y-intercept ;
B. x-intercept: (1, 0) , no y-intercept ;
C. x-intercept: 
, no y-intercept ;
D. x-intercept: (0, 0) , y-intercept: (0, 0) ;