Write the verbal expression for each. 11. "the product of a number and 4"
12. "five times the difference of a number and 3"
13. "seven less than a number squared"

Ametalworker has a metal alloy that is 30? % copper and another alloy that is 55? % copper. how many kilograms of each alloy should the metalworker combine to create 90 kg of a 50? % copper? alloy?

Use set builder notation to represent the following set: { -3, -2, -1, 0}

Which of these tools or constructions is used to inscribe a hexagon inside a circle?