1. What is the equation in point-slope form of the line that crosses the x-axis at 10 and is perpendicular to the line represented by y = 12x − 7? A. y = 2(x −10)
A. , y = 2(x −10),

B. y − 10 = −2(x − 0)
B. , y − 10 = −2(x − 0),

C. y = −2(x − 10)
C. , y = −2(x − 10),

D. y = −2(x + 10)

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Given: ae ≅ ce ; de ≅ be prove: abcd is a parallelogram. we have that ab || dc. by a similar argument used to prove that △aeb ≅ △ced, we can show that △ ≅ △ceb by. so, ∠cad ≅ ∠ by cpctc. therefore, ad || bc by the converse of the theorem. since both pair of opposite sides are parallel, quadrilateral abcd is a parallelogram.

At store a, erasers are sold individually. the cost y of x erasers is represented by the equation y=0.75x. the costs of erasers at store b are shown in the graph.