Factor the expression. Express your answer so that only positive exponents occur. x2/5 + x-1/5
A. x-1/5(x3/5 + x)
B. x-1/5(x3/5 - 1)
C. x-1/5(x3/5 + 1)
D. x-1/5(x3/5)
Answer: C
Mathematics
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Solve. Simplify the answer.Barat walked 
mile to his biology class, 
mile to his art class, 
mile to his calculus class, and then back to his dormitory. If he walked 1 mile altogether, how far did he walk from his calculus class to his dormitory?
A. 
mi
B. 
mi
C. 
mi
D. 
mi
Mathematics
Simplify the expression. First use the distributive property to remove any parentheses.7(x - 9)
A. 7x - 16 B. 7x + 63 C. 7x - 9 D. 7x - 63
Mathematics
Find the domain of the given function.f(x) = 
A. [-3, ?)
B. (3, ?)
C. (- 
, ?)
D. [
, ?)
Mathematics
Write an equation to describe the variation. Use k for the constant of proportionality.w varies directly as b
A. w = 
B. w = kb
C. b = 
D. b = kw
Mathematics