Simplify, then write in descending order.9x7 + 9x4 + 7 + 3x7 - 1
A. 9x7 + 12x4 + 6
B. 9x4 + 12x7 + 6
C. 12x7 + 9x4 + 6
D. 21x4 + 6
Answer: C
Mathematics
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Add.-14 + (-52)
A. 66 B. -38 C. 38 D. -66
Mathematics
Solve the equation.3.5 = 
A. 31.5 B. 11.5 C. 12.5 D. 30.5
Mathematics
Solve the problem.What is the intensity in watt/m2 of a noise measured at 92 decibels? 
where S0 is 10-12 watt/m2. (Express in scientific notation, and round to three significant digits.)
A. 9.89 × 1015 watt/m2 B. 1.58 × 10-2 watt/m2 C. 9.2 × 10-10 watt/m2 D. 1.58 × 10-3 watt/m2
Mathematics
Solve for the variable.4(2x - 5) = 7(x + 5)
A. x = -15 B. x = 19 C. x = 15 D. x = 55
Mathematics