18 people x 18 walls = 324 minutes
I would use long division to show my work. But I can tell you the answer. The answer is 121.
Answer:
Step-by-step explanation:
Given:
Solution:
We can solve for 
to make it less complicated.
Now we can solve for 
.
Kx^2-x-1=0
Kx^2-x=1
Kx^2=1+x
K=1+x/x^2
To solve this problem you will need to use the cross product method:
1/16 of an hour → write 1 card
3/4 of an hour → write X cards
(3/4) ÷ (1/16) = X
0.75 ÷ 0.0625 = X
12 = X
Joey can write 12 Thank you cards in 3/4 of an hour.
There you go! I really hope this helped, if there's anything just let me know! :)
