Solve using the quadratic formula.x2 - 8x - 20 = 0
A. -2, -18
B. -10, 2
C. -2, 10
D. -1, 
Answer: C
Mathematics
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Subtract.79
A. 34 B. 44 C. 114 D. 104
Mathematics
Factor using the formula for the sum or difference of two cubes.8x3 - 1
A. (2x - 1)(4x2 + 1) B. (8x - 1)(x2 + 2x + 1) C. (2x - 1)(4x2 + 2x + 1) D. (2x + 1)(4x2 - 2x + 1)
Mathematics
Multiply.1 ? 
A. 24
B. 
C. 
D. 25
Mathematics
Solve the system using the inverse matrix method.
?b ? 0
A. x = 
, y = 1; 
B. x = 
, y = -1; 
C. x = 
, y = 1; 
D. x = 1, y = 
; 
Mathematics