Solve the quadratic equation using the quadratic formula.x2 - 8x - 13 = 0
A. {-4 + 
, -4 - 
}
B. {4 + 
, 4 - 
}
C. {8 + 
, 8 - 
}
D. {4 + 
, 4 - 
}
Answer: D
Mathematics
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Express the number in scientific notation.3,672,000,000
A. 367.2 × 107 B. 3.672 × 106 C. 3672 × 106 D. 3.672 × 109
Mathematics
Solve the special system by elimination. If the system is dependent, write the solution using set-builder notation with the common line expressed in slope-intercept form.
A. {(x, y)|y = 5x + 7}
B. {(x, y)|y = -5x + 7}
C. ?
D. 
Mathematics
Multiply.(2x + 9y)2
A. 2x2 + 36xy + 81y2 B. 4x2 + 81y2 C. 4x2 + 36xy + 81y2 D. 2x2 + 81y2
Mathematics
Multiply and simplify.
? 
A. 
B. 
C. 
D. 
Mathematics