Iwent to the grocery store the other day and there were no price tags on anything! i bought 3 loaves of bread and 1 milk jug and when the cashier scanned it, the total was $9. then i saw the person behind me bought 1 loaf of bread and 2 milk jugs. her total was $5.50. i walked out: how much does one loaf of bread cost?

To solve this problem, set up and solve a system of equations.  The variables b and m will represent a bread loaf and milk jug, respectively:



I would solve using substitution.  Take one of the equations and set it equal to one of the variables, for example:



Now, plug this into the other equation for m and solve for b:



We now know that a loaf of bread costs $2.50.  Plug this value in for b in the first equation and solve for m:



One jug of milk costs $1.50 and one loaf of bread costs $2.50.

Number nine is f(x)= 40x : ) hoped i ya