Simplify
25/4
=
25/2a
=
2b
=
c

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.

If tan2a=cot(a+60), find the value of a, where 2a is an acute angle

Can someone me with my math problem pls my teacher is on my back about this