Solve the equation.
= -15
A. 
B. ?
C. {-15}
D. {15}
Answer: B
Mathematics
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Solve the problem.The gravitational force (in lb) of attraction between two objects is given by 
where x is the distance between the objects. If the objects are 15 ft apart, find the work required to separate them until they are 75 ft apart. Express the result in terms of k.
A. 
k
B. 
k
C. 
k
D. 
k
Mathematics
Use quadratic regression to model the following data. Round your answers to two decimal places, if necessary. x 2.13 3.45 4.76 6.18 8.22 y 3.64 5.82 9.16 7.32 3.19?
A. ?
B. ?
C. 
D. ?
Mathematics
Evaluate the expression without using a calculator.
1/2
A. 
B. 
C. 
D. 
Mathematics
Perform the indicated operations and simplify the result. Leave the answer in factored form.
+ 
A. 
B. 
C. 
D. 
Mathematics