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State if the two triangles are congruent. if they are, state how you know?

Asmall business produces and sells balls. the fixed costs are $20 and each ball costs $4.32 to produce. each ball sells for $8.32. write the equations for the total cost, c, and the revenue, r, then use the graphing method to determine how many balls must be sold to break even.

The measure of an angle is 117°. what is the measure of a supplementary angle?