Write the expression with positive exponents. Then simplify if possible.(-2)-4
A. - 
B. -16
C. 16
D. 
Answer: D
Mathematics
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Find the domain of the expression.
?
?
A. All real numbers x such that x ? 2 B. All real numbers x such that x ? 2 C. All real numbers x such that x > 2 D. All nonnegative real numbers x such that x < 2 E. All real numbers x such that x ? 2
Mathematics
Assume that the cities lie on the same north-south line and that the radius of the earth is 6400 km. Find the distance between City A, 34° N and City B, 37° N. (Round to the nearest kilometer.)
A. 406 km B. 372 km C. 335 km D. 301 km
Mathematics
Write the phrase as a mathematical expression. Use x as the variable.Twice some number
A. 2 + x
B. 2x
C. 
D. 2 - x
Mathematics
Perform the operation shown below and leave the result in trigonometric form.
?
?
A. 
B. ?
C. ?
D. ?
E. ?
Mathematics