Solve quadratic equation by factoring.x(x - 2) = 80
A. -8, -10
B. 8, 10
C. -8, 10
D. 8, -10
Answer: C
Mathematics
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Solve the equation.2{5 - [7(k + 3) - 6(k + 3)]} = -4k
A. 
B. {- 2}
C. 
D. 
Mathematics
Solve the problem.Use the formula d = 10 log (I/I0), where the loudness of a sound in decibels is determined by I, the number of watt/m2 produced by the soundwave, and 
watt/m2. What is the intensity in watt/m2 of a noise measured at 84 decibels? Round to the nearest tenth.
A. 2.5 × 10-3 watt/m2 B. 2.5 × 10-4 watt/m2 C. 8.4 × 10-10 watt/m2 D. 4.4 × 1015 watt/m2
Mathematics
Simplify.
A. 
B. 
C. 
D. 
Mathematics
Write the exponential expression as a radical.9x7/5
A. 9
B. 
C. 9
D. 
Mathematics