Solve the system of equations by using substitution. 
A. x = 1, y = 0
B. x = 0, y = 1
C. x = 1, y = 1
D. x = 0, y = 0
Answer: B
Mathematics
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Find the logarithm using the change-of-base formula.log4 2
A. 2.0000 B. 0.5000 C. -0.5000 D. 1.0000
Mathematics
We use ln to denote the natural logarithm. The solution for t of the equation
is:
?
A. 
B. 
C. 
D. 
Mathematics
Solve. If necessary, round to the nearest tenth.If a tree 52.5 feet tall casts a shadow that is 21 feet long, find the height of a tree casting a shadow that is 25 feet long.
A. 44.1 ft B. 10 ft C. 62.5 ft D. 56.5 ft
Mathematics
Provide an appropriate response.A proper fraction has the form 
. What is the largest possible number that x can be?
A. 21 B. 20 C. 22 D. 10.5
Mathematics