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○ 6

○

Step-by-step explanation:

Let c represent three-pound bags and a represent one-pound bags.

Use a system of equations:

{9 = c + a

{36 = 5c + 2a

−⅕[36 = 5c + 2a]

{9 = c + a

{−7⅕ = −c - ⅖a >> New Equation

____________

1⅘ = ⅗a

__ ___

⅗ ⅗

[Plug this back into both equations above to get the c-term of 6];

_______________________________________________

Twenty dollars a day means exactly the way it sounds, so the expression of this is , then fifteen dollars is the initial cost you pay on top of your daily fee:

I am joyous to assist you anytime.

he earned 78.75 in interest.

step-by-step explanation: