Add or subtract as indicated. Write the answer in lowest terms.9 - 
A. 
B. 
C. 
D. 
Answer: D
Mathematics
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Solve.Using the chessboard parable, find the total weight (in pounds ) when all squares up to and including 19 are filled. Assume that each grain of wheat weighs 1/7000 pound. Round your answer to the nearest pound.
A. 37 pounds B. 5 pounds C. 75 pounds D. 19 pounds
Mathematics
Add or subtract. Write the answer in lowest terms.
- 
A. 
B. 
C. 
D. 
Mathematics
Solve the system by graphing. If there is no solution or an infinite number of solutions, so state. Use set notation to express the solution set.
A. {(5, 4)} B. {(-5, -4)} C. no solution; ? D. {(-5, 4)}
Mathematics
Simplify the expression.27-4/3
A. 81
B. 
C. - 
D. not a real number
Mathematics