Rosemary had $25 to spend on school supplies she buys four packages of mechanical pencils. After her trip to the store, she only has $1 left. How much should each pack of pencils cost?

Each pack of pencils cost $6.

Step-by-step explanation: Rosemary had $25 and was left with $1, so she spent $24 in total for four packages, therefore, you can divide $24 into 4 to find out the individual cost, which is $6.

y=-2.5x+12.5

step-by-step explanation:

5y=2x+10

y=0.4x+2

slope=-2.5

5=-2.5*3+b

b=12.5