The length of a spring varies directly with the mass of an object that is attached to it. when a 30-gram object is attached, the
spring stretches 9 centimeters. which equation relates the mass of the object, m, and the length of the spring, s?
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We just started the introduction into circles and i have no idea how to do this.

Awasher and a dryer cost $701 combined. the washer costs $51 more than the dryer. what is the cost of the dryer?

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.