Please help asap no wrong answers pls

Suppose the radius of a circle is 16. what issuppose the radius of a circle is 16. what is its circumference its circumference

The suare root of 9x plus 7 plus the square rot of 2x equall to 7

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?