Solve the equation.3x - 6 = 12
A. {10}
B. {19}
C. {15}
D. {6}
Answer: D
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Solve.The thickness of an airport runway's pavement is determined by the weight of the planes using it. The relationship between runway thickness x, in inches, and gross airplane weight y, in thousands of pounds, can be modeled by the equation 
If a loaded cargo plane weighs 300,000 pounds, what must the minimum thickness of the runway be? Round any partial inch up to the nearest whole inch.
A. 11 in. B. 39 in. C. 40 in. D. 12 in.
Solve the problem.A vertical right circular cylindrical tank measures 
high and
diameter. It is full of oil weighing 
. How much work does it take to pump the oil to the level of the top of the tank? Give your answer to the nearest ft ? lb.
A. 10,640,197 ft ? lb B. 5,320,099 ft ? lb C. 44,334 ft ? lb D. 2,660,049 ft ? lb
Solve the problem.Find all the points having an x-coordinate of 9 whose distance from the point (3, -2) is 10.
A. (9, 13), (9, -7) B. (9, -12), (9, 8) C. (9, 2), (9, -4) D. (9, 6), (9, -10)
Find the domain of the function.f(x) = x2 + 4
A. (-?, ?) B. (-?, -4) or (-4, ?) C. [-4, ?) D. (-4, ?)