Answer:
Step-by-step Solution:
<u>Isolate the variable x to get the answer.</u>
- x − 2/5 = −1
- => x = -1 + 2/5
- => x = -1 + 0.4
- => x = -0.6
Hence, the value of x is -0.6.
 
        
                    
             
        
        
        
Answer:
Perimeter = 42 units Area = 57.73 square units
Step-by-step explanation:
Perimeter of an Astroid = 6l ---> 6 x 7 = 42 units 
Area of an Astroid = (3 x pi x a^2)/8 = 57.73 square units
 
        
             
        
        
        
Answer:
y=2x+3 
Step-by-step explanation:
Use the equation: y=mx+b
m is the slope (2 in this case)
b is the y intercept (3 in this case)
So the equation of the line would be y=2x+3
 
        
             
        
        
        
Answer:
It is a 
Step-by-step explanation: I looked it up
 
        
             
        
        
        
a.

is a proper joint density function if, over its support,  is non-negative and the integral of
 is non-negative and the integral of  is 1. The first condition is easily met as long as
 is 1. The first condition is easily met as long as  . To meet the second condition, we require
. To meet the second condition, we require

b. Find the marginal joint density of  and
 and  by integrating the joint density with respect to
 by integrating the joint density with respect to  :
:


Then


c. This probability can be found by simply integrating the joint density:

