Solve by completing the square.x2 + 4x - 9 = 0
A. {-2 ± 2
}
B. {2 ± 
}
C. {-2 ± 
}
D. {-1 ± 
}
Answer: C
Mathematics
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Find the x- and y-intercepts. If no x-intercepts exist, state so. Round to two decimal places if necessary.f(x) = -x2 + 13x - 42
A. x-intercepts (6, 0) and (7, 0); y-intercept (0,-42) B. x-intercepts (6, 0) and (7, 0); y-intercept (0,6) C. x-intercepts (-6, 0) and (-7, 0); y-intercept (0,-42) D. No x-intercepts; y-intercept (0,6)
Mathematics
Find the sum.- 
+ 
A. 1
B. - 1
C. - 
D. 
Mathematics
Graph the piecewise-defined function.
?
?
A. ?
B. ?
C. ?
D. ?
Mathematics
Write the number in scientific notation.290,000
A. 2.9 × 10-6 B. 2.9 × 105 C. 2.9 × 10-5 D. 2.9 × 106
Mathematics