Eight friends ate at a restaurant and agreed to share the bill equally. because judi forgot her money, each of her seven friends paid an extra $2.50 to cover her portion of the total bill. what was the total bill?

Acoffee shop orders at most $3,500 worth of coffee and tea. the shop needs to make a profit of at least $1,900 on the order. the possible combinations of coffee and tea for this order are given by this system of inequalities, where c = pounds of coffee and t = pounds of tea: 6c + 13t ≤ 3,500 3.50c + 4t ≥ 1,900 which graph's shaded region represents the possible combinations of coffee and tea for this order?

1) prove that 731^3−631^3 is divisible by 100 2) prove that 99^3−74^3 is divisible by 25

What is the length of the midsegment of a trapezoid with bases of length 15 and 25 ?