Answer:
320 cups of soup.
Step-by-step explanation:
Given:
A chef planning for a large banquet thinks that 2 out of every 5 dinner guests will order his soup appetizer.
He expects 800 guests at the banquet.
Question asked:
How many cups of soup he should prepare ?
Solution:
Ratio of soup appetizer to the number of guest = 2 : 5
Now, let number of cups of soup prepare for 800 guests = 
Now, as we have to find through <u>equivalent ratios,</u> we can write it as:-
<em>2 : 5 = </em>
<em> : 800</em>

Thus, he should prepare 320 cups of soup for 800 guests.
Answer:
ab/(a+b)
Step-by-step explanation:
Without loss of generality, we can put point C at the origin and define line BD by the equation ...
x/a +y/b = 1
Points (x, y) fall on the line BD, and we have point L where x=y. That value of x, the square's side length, will satisfy ...
x/a +x/b = 1 . . . . . fill in x=y in the equation
x(a+b)/ab = 1 . . . .factor out x, add 1/a+1/b
x = ab/(a+b) . . . . solve for x
The length of the side of the square is ab/(a+b).
the answer is c=10s-0.10s