A) A= { x thuộc N / x = ab, a = 3b} b) B= {x thuộc N / 20 chia hết x }
c) C= {x thuộc N / x chia hết 2 và 30 < x < 46 }
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Aretha wanted to gather data about the cost of local bowling leagues in her area. she plotted the data and determined that the average bowling league costs consist of a one-time registration fee and a monthly fee modeled by the equation y = 15x + 20. identify and interpret the y-intercept in this model. the y-intercept is 20. this is the cost per month. the y-intercept is 20. this is the cost of registration. the y-intercept is 15. this is the cost of registration. the y-intercept is 15. this is the cost per month.