Write the phrase as a variable expression. Use x for the unknown number.The sum of 18 and twice a number
A. 2(18 + x)
B. 18 - 2x
C. 18 + 2x
D. 18 + x
Answer: C
Mathematics
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Solve the equation.
= 
A. -2, 6 B. 0, - 3 C. No solution D. 0, 36
Mathematics
Determine whether the given equation is a rational function.f(x) = 
A. Yes B. No
Mathematics
Select the first five terms of the sequence. (Assume that n begins with 1.)
?
?
A. 
B. 
C. 
D. 
E. 
Mathematics
Write the standard form of the equation of the circle with the given center and radius.Center (0, 4), r = 3
A. (x - 4)2 + y2 = 9 B. x2 + (y - 4)2 = 9 C. (x + 4)2 + y2 = 9 D. x2 + (y + 4)2 = 3
Mathematics