Base de datos :a=3 ,b=_2, c=5 y d=_6

1. _d÷ab=
2. _d÷(ab)=
3. 10+cb=
4. _d_c+a=

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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.

Arectangle plot measure 20ft. by 30ft. a 3-ft.-wide sidewalk surrounds it.find the area of the sidewalk.