A factory has 3 engineers, 7 technicians, & 2 labors. A team of 3 persons is selected from the factory

Tom had a total of $220 and he spent $35 on a basketball ticket . what percent of his money did he have left?

What is the value of x when x + 7 = 21?

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.