A laboratory buys one pound of carbon graphite powder and 3 pounds of magnetite powder, which costs a total of $9.30. They spend $21.20 on 4 pounds of carbon graphite powder and 2 pounds of magnetite powder. In the equations below, c represents the cost per pound of carbon graphite powder, and m represents the cost per pound of magnetite powder. c + 3m = $9.30 4c + 2m = $21.20 What is the cost per pound of carbon graphite powder?

Question

A laboratory buys one pound of carbon graphite powder and 3 pounds of magnetite powder, which costs a total of $9.30. They spend $21.20 on 4 pounds of carbon graphite powder and 2 pounds of magnetite powder. In the equations below, c represents the cost per pound of carbon graphite powder, and m represents the cost per pound of magnetite powder.   c + 3m = $9.30 4c + 2m = $21.20  What is the cost per pound of carbon graphite powder?

anonymous · Answer

is that a 9.30*4c or plus?

anonymous · Answer

never mind. is it two different equations?