Question 914467
Assign a variable.
c, price for pound of copper in dollars per pound.
c+1, price for tin, dollars per pound.
The concentration you use is DOLLARS per POUND.


{{{(2(c+1)+8c)/(2+8)=4.45}}}


Most important is to understand how to form that equation.  Once understood, you understand this problem, and can solve for c, and then compute c+1.