Answer:
○ 6
○ [tex]C(d) = 20d + 15[/tex]
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
[tex]3 = a[/tex] [Plug this back into both equations above to get the c-term of 6]; [tex]6 = c[/tex]
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Twenty dollars a day means exactly the way it sounds, so the expression of this is [tex]20d[/tex], then fifteen dollars is the initial cost you pay on top of your daily fee:
[tex]C(d) = 20d + 15[/tex]
I am joyous to assist you anytime.
