4. At a sale on summer clothing , Jeff bought three pairs of flip-flops and five tank - tops for $ 55 . Tori bought three pairs of flip - flops and two tank -tops for $ 31. What is the price for a pair of Flip -flops and what is the price for a tank - top?

Idon’t understand this.. will someone ? will mark brainliest along with 20 points.

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.

If a is a nonzero real number then the reciprocal of a is