Let x represent the number. Write the English phrase as an algebraic expression.Twice the sum of a number and 9
A. 18 + x
B. 9(x + 2)
C. 2x + 9
D. 2(x + 9)
Answer: D
Mathematics
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Answer the question.For f(x) = x2 - 9 and g(x) = 2x + 3, what is the domain of 
A. 
B. 
x ? - 
C. All real numbers
D. 
x ? - 
Mathematics
Evaluate the radical expressions or indicate that the root is not a real number.
A. 3 B. 81 C. -3 D. not a real number
Mathematics
Find the decimal form for the rational number. If it repeats, then so indicate with a bar.- 
A. -7.33
B. -7.3
C. -7.
D. -7.34
Mathematics
Convert.7.36 kg to grams
A. 0.0736 g B. 7360 g C. 736 g D. 0.00736 g
Mathematics