Find the condition that the line lx + my + n = 0 should be normal to the circle x2 + y2 + 2gx + 2fy + c = 0,
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In the equations, a and b represent the price per night for a room in hotel a and hotel b, respectively, w weeks after september 1 last autumn. what was the price per night in hotel a when it was equal to the price per night in hotel b? a = 240 − 20w b = 320 − 30w

Find the missing variable for a parallelogram: a = latex: 32in^2 32 i n 2 h = b = 6.3 in (1in=2.54cm)

Select the two pairs of figures that are similar.