Solve the problem.A voltage source of 12 volts can supply a voltage V (in volts) through a 72-ohm line to a variable resistance R (in ohms) given by the following equation. V = 
. How fast does V change with respect to R when R is 67 ohms?
A. 0.167 V/?
B. 0.045 V/?
C. 0.192 V/?
D. 6.216 V/?
Answer: B
Mathematics
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Use rational exponents to simplify the expression, if possible. Then, write the answer in radical form.
A. x27
B. x3
C. 
D. 3z
Mathematics
Find the indicated matrix.Let A = 
and B = 
. Find A + B.
A. 
B. 
C. 
D. 
Mathematics
Simplify the rational expression. Find all numbers that must be excluded from the domain of the simplified rational expression.
A. Already in lowest terms B. -x, x ? 7 C. 1, x ? 7 D. -1, x ? 7
Mathematics
Perform the indicated operation. Simplify if possible.
+ 
A. 
B. 
C. 
D. 
Mathematics