Add or subtract. Then simplify by collecting like radical terms, if possible.13 
+ 7 
A. 20 
B. 20 
C. -6 
D. 20 
Answer: B
Mathematics
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Evaluate.If 
and 
, evaluate 
A. 0 B. 4 C. -9 D. 10
Mathematics
Convert. When necessary, round the answer to two decimal places.146 ounces = ____ pounds Give your answer as a mixed number.
A. 9
B. 14
C. 9
D. 9
Mathematics
Solve using the elimination method. If the system has no solution or an infinite number of solutions, state this.7x - 6y = 364x - 3y = 18
A. (0, -6) B. (-1, -5) C. No solution D. (0, -5)
Mathematics
Solve.The pitch P of a musical tone varies inversely as its wavelength W. One tone has a pitch of 240 vibrations per second and a wavelength of 14 ft. Find the wavelength of another tone that has a pitch of 449 vibrations per second. Round your answer as appropriate.
A. 7697.1 ft B. 7.5 ft C. 0.00013 ft D. 0.13 ft
Mathematics