What is the gradient of a line perpendicular to a line with a
gradient of 2?

How to write 3 tenths and 5 tenths as a decimal

The final cost of a sale is determined by multiplying the price on the tag by 75%. which best describes the function that represents the situation?

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.