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Express cos J as fraction in simplest terms

What are the relative frequencies to the nearest hundredth of the columns of the two-way table?

Identify the converse of the following conditional: if a point is in the first quadrant, then its coordinates are positive. if the coordinates of a point are not positive, then the point is not in the first quadrant. if the coordinates of a point are positive, then the point is in the first quadrant. if a point is in the first quadrant, then its coordinates are positive. if a point is not in the first quadrant, then the coordinates of the point are not positive.

Determine which expressions represent real numbers and which expressions represent complex number. asaaap! plis!