Roxannee is buying suppliers for a catering job. She bought a piece of salmon for $31.28. If the cost of the salmon was $9.20 per pund, how many pounds did she buy? (Show your work)

she bought 3.4 pounds

Step-by-step explanation:

They must make lunches of a number greater than 8 to make a profit.

Step-by-step explanation:

Let there be x lunches the student has to make.

So, the selling price of the x lunches will be 4x.

Now, they had to pay an advertising fee of $20 and the ingredients cost $1.5 to make each lunch.

So, the total making charges of x lunches is (20 + 1.5x).

To make a profit the condition is 4x > 20 + 1.5x

⇒ 2.5x > 20

⇒ x > 8.

Therefore, they must make lunches of a number greater than 8 to make a profit. (Answer)