From the figure and statement provided, select the proper TO PROVE statement. If two parallel planes are cut by a third plane, the lines of intersection are parallel.
OMN= AB
AB + BC = AC
om is parallel to I
AB= BC
ais parallel to b

Suppose a man is heterozygous for heterochromia, an autosomal dominant disorder which causes two different‑colored eyes in an individual, produced 25‑offspring with his normal‑eyed wife. of their children, 15 were heterochromatic and 10 were‑normal. calculate the chi‑square value for this observation.

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Which shows the correct solution of the equation 1/2a+2/3b=50, when b=30?