Six is less than or equal to the sum of 4 and -2x

Don't know how to find x given these segment lengths

What dimensions can créate more than one triangle ?

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.