Use the addition property of equality to solve the equation.11s = 10s + 13
A. 13
B. 23
C. 14
D. -13
Answer: A
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Solve the problem.A 100 gal tank is half full of distilled water. At time = 0, a solution containing 2 lb/gal of concentrate enters the tank at the rate of 4 gal/min, and the well-stirred mixture is withdrawn at the rate of 
When the tank is full, how many pounds of concentrate will it contain?
A. 187.5 pounds B. 175 pounds C. 150 pounds D. 200 pounds
Solve the problem.If an object is dropped, the distance it falls during t seconds is given by d(t) = 
gt2, where g is about 32 ft/sec2. Find the distance an object would fall in 6 seconds.
A. 288 ft B. 96 ft C. 1152 ft D. 576 ft
Solve for x: x2 - 7x - 8 = 0
a. x = -3, 4 b. x = -8, 1 c. x = -7, 1 d. x = 7, -1 e. x = 8, -1
Find the partial derivative.Let z = f(x,y) = 9x2 - 11xy + 4y3. Find 
.
A. 18x - 11y B. 18x + 11y2 C. -11x - 12y D. -11x + 12y2