Use the properties of logarithms to simplify the expression.
?
?
A. 0
B. ?
C. 
D. -5
E. 5
Answer: E
Mathematics
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Find the angle between u and v in radians.u = 2i - 2j - 9k, v = 9i + 4j - 7k
A. 0.88 B. 0.70 C. 1.25 D. 1.57
Mathematics
Use percents, percent equations, and/or percent proportions to solve the application.A company has 25 franchises in China. This number is expected to increase to 32 over the next three years. What is this percent increase?
A. 72% B. 21.9% C. 28% D. 7%
Mathematics
Write a proportion that models the situation described. Then, solve the proportion for x.If 3.5 ounces of oil are to be added to 17.5 gallons of gasoline, then x ounces of oil should be added to 39.5 gallons of gasoline.
A. 
= 
; x = 7.9 ounces
B. 
= 
; x = 7.8 ounces
C. 
= 
; x = 197.5 ounces
D. 
= 
; x = 8.1 ounces
Mathematics
Solve.3x2 + 12x = - 7
A. 
B. 
C. 
D. 
Mathematics