Factor the following expression using the GCF. 4dr – 16r

r(4d – 16)
2r(2d – 8)
4(dr – 4r)
4r(d – 4)

were is the equation

ca = ec

cpctc makes it so that corresponding parts of the triangle you proved to be equal are equal, the other options aren't part of the part of the triangles you proved to be equal.

y=20x

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hope this