Simplify the expression, writing the answer as a single term without negative exponents.(a-1 + b-1)-1
A. 
B. 
C. 
D. 
Answer: C
Mathematics
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Find the exact value. If the value of the function is not defined, write undefined.cos (-4?)
A. -1 B. 0 C. Undefined D. 1
Mathematics
Find the perimeter of the triangle.an equilateral triangle whose side measures 16 mi
A. 48 mi B. 47 mi C. 32 mi D. 128 mi
Mathematics
Add and, if possible, simplify.
x + 
x
A. 
B. 
x
C. 
x
D. 
Mathematics
Differentiate.f(x) = 3 - e-x
A. e-x B. 3 - e-x C. -e-x D. 3 + e-x
Mathematics