Solve the variation problem.The gravitational attraction between two masses varies inversely as the square of the distance between them. If the force of attraction is 4 lb when the masses are 3 ft apart, what is the attraction when the masses are 6 ft apart?
A. 2 pounds
B. 4 pounds
C. 1 pound
D. 3 pounds
Answer: C
Mathematics
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Evaluate the expression for the given replacement values. Write the answer in simplest form.x + y for x = 
, y = 
A. 2
B. 
C. 1
D. 
Mathematics
Find the value of x that satisfies the equation.
+ x = 8
A. x = 
B. x = 
C. x = 
D. x = 15
Mathematics
Solve the absolute value inequality. Other than ?, use interval notation to express the solution set and graph the solution set on a number line.
< 3
A. (-8, 8)
B. (-?, -8) ? (8, ?)
C. (-?, -8) ? (0, ?)
D. (-8, 0)
Mathematics
Write the following as an algebraic expression in u, u > 0.tan 
A. 
B. 
C. u2
D. 
Mathematics