Solve the system of equations by the substitution method. Check your solutions. For any dependent equations, write your answer in ordered pair form.
A. {(3, -1)}
B. {(-3, 0)}
C. {(2, 0)}
D. ?
Answer: A
Mathematics
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Use scientific notation to perform the following operations. Leave your answer in scientific notation.(6 × 10-4) ÷ (12 × 102)
A. 5.0 × 105 B. -5.0 × 10-7 C. 5.0 × 10-7 D. -5.0 × 105
Mathematics
Solve the quadratic equation by completing the square.x2 + x + 3 = 0
A. 
B. 
C. 
D. 
Mathematics
Determine whether the graph of the equation is a circle or an ellipse.x2 + y2 - 6x - 4y + 4 = 0
A. Ellipse B. Circle
Mathematics
Solve the logarithmic equation symbolically.log 8x = 8.7
A. x = 
B. x = 696
C. x = 108.7/8
D. x = 100.7
Mathematics