Find an equation of the line containing the centers of the two circles whose equations are given below. x2+y2−2x+4y+1
=0
x2+y2+4x+2y+4
=0

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Which expression is equivalent to 16 in exponential form? a) 4 × 4 b) 8 × 2 c) 23 d) 24

In which quadrant does the point lie? write the coordinates of the point. a. quadrant ii; (–2, –4) b. quadrant iii; (2, 4) c. quadrant iii; (–2, –4) d. quadrant iv; (–4, –2)