Write an algebraic expression that illustrates the additive identity.

Let r = 3. what is the value of r + 58?

Use set builder notation to represent the following set: { -3, -2, -1, 0}

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.