Charles Lost 6 kilograms over 4 months. Two months later when he weighed himself the scale read 82 kg this meant he had gained 4 kg in two months what had he weighed six months earlier?

Twice the sum of a number and 4 is equal to three times the difference of the number and 7. find the number.

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.

How can constraints be used to model a real-world situation?