Simplify the expression. Assume that all variables are positive when they appear.
- 
+ 
A. 9x
- 4
B. 8x
- 4
C. 9x
- 4
D. 9
- 
Answer: C
Mathematics
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Solve.The pitch P of a musical tone varies inversely as its wavelength W. One tone has a pitch of 370 vibrations per second and a wavelength of 18 ft. Find the wavelength of another tone that has a pitch of 498 vibrations per second. Round to the nearest tenth of a foot if necessary.
A. 13.4 ft B. 0.000098 ft C. 10,236.7 ft D. 0.07 ft
Mathematics
Perform the indicated operation.(x - 4)(x + 9)
A. x2 + 5x - 36 B. x2 - 5x - 4 C. x2 - 5x + 36 D. x2 - 13x - 36
Mathematics
Provide an appropriate response.Write in decimal form. 4.495 × 106
A. 449,500 B. 4,495,000 C. 269.7 D. 44,950,000
Mathematics