Find the specified domain and express it in interval notation.For f(x) = x2 - 81 and g(x) = 2x + 3, what is the domain of 
(x)?
A. All real numbers
B. 
C. (-?, -9) ? (-9, 9) ? (9, ?)
D. 
? 
Answer: C
Mathematics
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Provide an appropriate response.A letter or symbol that represents one or more unknown values is a(n):
A. equation B. known C. constant D. variable
Mathematics
Factor the GCF out of the given expression.81x8y8 + 54x2y6 - 90x5y3
A. 9x(9x8y8 + 6x2y6 - 10x5y3) B. 9x2y3(9x6y5 + 6y3 - 10x3) C. 9x2(9x6y8 + 6y6 - 10x3y3) D. 9(9x8y8 + 6x2y6 - 10x5y3)
Mathematics
Solve the problem.Use determinants to find the area of the triangle with vertices (1, 6), (4, 1), and (0, 0).
A. 12.5 B. 12.0 C. 11.5 D. 11.0
Mathematics
Suppose that ? is in standard position and the given point is on the terminal side of ?. Give the exact value of the indicated trig function for ?.(-20, 48); Find sin ?.
A. 
B. - 
C. - 
D. 
Mathematics