Question

Mark as brainliest answer correctly and explain not long

Answer 1

Answer:

○ 6

○ $C(d) = 20d + 15$

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

$3 = a$ [Plug this back into both equations above to get the c-term of 6]; $6 = c$

_______________________________________________

Twenty dollars a day means exactly the way it sounds, so the expression of this is $20d$, then fifteen dollars is the initial cost you pay on top of your daily fee:

$C(d) = 20d + 15$

I am joyous to assist you anytime.