Assume that x is a positive number. Use the properties of logarithms to write the expression
?
logb (x + 8) - logbx as the logarithm of one quantity.
?
A. 
B. 
C. 
D. 
E. logb (x2 - 8x)
Answer: B
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Find the indicated vector.Let u = 
, v = 
. Find u + v.
A. 
B. 
C. 
D. 
Solve the proportion.
= 
A. 28 B. 3.5 C. 14 D. 92.6
Solve the problem.The intensity of light from a light source varies inversely as the square of the distance from the source. Suppose the the intensity is 40 foot-candles at a distance of 10 feet. What will the intensity be at a distance of 22 feet? Round your answer to the tenths place.
A. 8.5 foot-candles B. 7.7 foot-candles C. 8.3 foot-candles D. 8.0 foot-candles
Graph. Label any intercepts and determine the slope of the line. If the slope is undefined, state this.x = -7
A. x-intercept: (-7, 0), m: - 
B. x-intercept: (0, -7), m: 0
C. x-intercept: (0, 0), m: -7
D. x-intercept: (-7, 0), m: undefined