Mike paid $2.94 in sales tax on an item that cost $42.00 before tax. at that rate, how much would he pay in sales tax for an item that cost $58.00 before tax?

Oscar and julie ashton are celebrating their 15th anniversary by having a reception hall. they have budgeted $4,500 for their reception. if the reception hall charges a $90 cleanup fee plus & 36 per person, find the greatest number of people that they may invite and still stay within their budget.

2x minus y equals 6, x plus y equals negative 3

The number of calories you burn depends on your weight. a 110-pound person burns 163 calories during 30 minutes of tennis. find the number of calories that a 190-pound person would burn during the same activity, assuming they burn calories at the same rate.