Use the domain and range of each of the following relations to determine which is a function. im timed i have 20min let

How many kilometers are equal to 5 miles? use 1 mile ≈ 1.61 kilometers. !

Kendra had twice as much money as kareem. kendra later spent $8 and kareem earned $6. by then, the two had the same amount of money. how much money did each have originally?

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.