The answer to the question is in the picture.
To solve this problem you must apply the proccedure shown below:
1. You have that
varies jointly as
and
and inversely as the product of
and
. Therefore, you can write the following equation, where
is the constant of proportionality:

2. Now, you must solve for the constant of proportionality, as following:

3. Susbtiute values:


4. Substitute the value of the constant of proportionality into the equation:

The answer is: 
I hope this helps you
square one side a
Area=a.a
49=a.a
7.7=a.a
a=7
Perimeter=4a=4.7=28
Multiplying fractions: multiply numerators and multiply denominators
1. 3/4 X -6/7 = -18/28 = -9/14
2. -2/7 X -3/7 = 6/49
3. 4 because 72/9 is 8. -72/-9 is 8. Two negatives makes a positive when multiplying and dividing.
Answer:
A. 18.2
Step-by-step explanation:
b^2 + 14^2 = 23^2
b = sqrt(333) = 18.248