Give the domain and range of the function.r(x) = 
- 4
A. Domain: [- 4, ?); Range: all real numbers
B. Domain: all real numbers; Range: all real numbers
C. Domain: all real numbers; Range: [- 4, ?)
D. Domain: all real numbers; Range: [0, ?)
Answer: C
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Find the standard-form equation of the ellipse centered at the origin and satisfying the given conditions.An ellipse with intercepts (±9, 0) and (0, ±8)
A. 
+ 
= 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 
+ 
= 1
Translate the problem to a system of equations, then solve using Cramer's Rule.Jerry has 3 pieces of string. The total length is 82 inches. The sum of the two longer pieces is 70. The middle piece is twice as long as the shortest piece. What are the lengths of the 3 pieces?
A. 6, 12, and 64 inches B. 12, 24, and 46 inches C. 12, 46, and 56 inches D. No solution
Perform the operation and write the result in the standard form.(9 + 4i)(7 + 5i)
A. 43 + 73i B. 20i2 + 73i + 63 C. 83 - 17i D. 43 - 73i
Determine the number of terms in the expression and then list the coefficients for each term.45x2 + 1
A. 2 terms: 45x2 and 1; coefficients: 45, 0 B. 1 term: 45x2; coefficient: 2 C. 1 term: 45x2; coefficient: 45 D. 2 terms: 45x2 and 1; coefficients: 45, 1