If 3c+4d=2 then c=(2-4d)/3
And if you put that into the other equation

Then you multiply everything by 3, getting

And then

Leaving

I dont have a calc with me right now but you just pot this into the calculator:

And when you get the number you insert it into the nest eqation to get c

So basically
1/4 foot = 3 inches.
The area of a 1/4-ft square is (3" x 3") = 9 square inches.
1/3 foot = 4 inches.
The area of a 1/3-ft square is (4" x 4") = 16 square inches.
The 1/3-ft square tile covers more area than a 1/4-ft square tile
covers. So she won't need as many 1/3-ft tiles to cover the floor
in her room. She will use fewer of those.
Answer:
0.3 cups
Step-by-step explanation:
divide 6 by 20
Hello there,
I hope you and your family are staying safe and healthy during this winter season.

We need to use the Quadratic Formula*
, 
Thus, given the problem:

So now we just need to plug them in the Quadratic Formula*
, 
As you can see, it is a mess right now. Therefore, we need to simplify it
, 
Now that's get us to the final solution:
, 
It is my pleasure to help students like you! If you have additional questions, please let me know.
Take care!
~Garebear