Answer:
A.
Step-by-step explanation:
As shown in the question we can interpret the following:

Now all we have to do is plug these values into the equation, and so we find that A. is the correct answer.
1.
The edge lengths of a triangle are inversely proportional to 2,3 and 4.
The actual proportions of the lengths are then
12(1/2:1/3:1/4)=6:4:3
The longest side
= 39* (6/(6+4+3)
= 39*6/13
=18
2. 63 breads : 35 kg flour
is the same as
54 breads : x kg flour
Cross multiply and get
x=54*35/63=30
30 kg of flour are needed to make 54 breads.
<span>Here's one --> 1000÷100=10</span>
Answer:3+x
Step-by-step explanation:3*x