6. "A number is at most -7."

Evaluate the expression for the given value of the variable 7a - 4a for a =8

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.

Why is x= 4 a solution to the proportion 14/x 56/1 6