Answer:
A quadrilateral is a polygon with four sides. A parallelogram is a quadrilateral with both pairs of opposite sides parallel and congruent. ... The geometric markings shown on the rectangle below indicate parallel sides with an equal number of arrows and congruent sides indicated with an equal number of hatch (hash) marks.
Step-by-step explanation:
 
        
             
        
        
        
Sin x =  square root (2) / 2
In order for us to get for cos x and tan x, first we need to know what 
Hypotenuse, Adjacent, and Opposite sides.
sin x = opposite / hypotenuse.
adjacent = square root (hypotenuse^2 - opposite^2)
adjacent = square root (2^2 - square root(2)^2)
adjacent = square root (4 - 2)
adjacent = square root (2)
cos x = adjacent / hypotenuse
tan x = opposite / adjacent..
cos x = square root (2) / 2
tan x = square root (2) / <span>square root (2)  = 1
So, </span>cos x = square root (2) / 2 and tan x<span> = 1</span>
        
             
        
        
        
Answer:
(a) The system of the equations  has no solution.
 has no solution.
(b) The system of the equations  has many solutions
 has many solutions 
Step-by-step explanation:
(a) To find the solutions of the following system of equations  you must:
 you must:
Multiply  by 2:
 by 2:

Subtract the equations

0 = -3 is false, therefore the system of the equations has no solution.
(b) To find the solutions of the system  you must:
 you must:
Isolate x for 

Substitute  into the second equation
 into the second equation

The system has many solutions.
Isolate y for 

 
        
             
        
        
        
Answer:
length when found = length at birth + (age × yearly growth)