Answer:
Step-by-step explanation:
For a triangle the area is

If our triangle is isosceles and the 2 congruent sides each measure 4 and they include an angle of 40 degrees, let's say that the vertex angle is 40 and the sides that are not the base each measure 4.  If we drop an altitude from the vertex to the base, we cut the triangle into 2 right triangles, with the vertex angle being 20 degrees and the hypotenuse being 4.  To find the base, then, which is opposite the angle, we use the sin ratio:
 and
 and
4sin(20) = b so
b = 1.368
But we need the whole base, and that is only half of it.  So
2b = 2.736
To find the height, which is adjacent to the angle, we use the cos ratio:
 and
 and
4cos(20) = h so
h = 3.759
Now we have enough info to find the area of the triangle using the triangle area formula from above:
 and
 and
A = 5 meters squared.
 
        
             
        
        
        
The answer is 0.91 because it is
        
             
        
        
        
Pretty sure it´s 12.25
61.25 /5=12.5 
you can check this by doing 12.5 x 5 ; 15 or 30 and you´ll get the same product in monthly earned
 
        
             
        
        
        
Angle F should be 46 degrees 
 
        
             
        
        
        
Answer:
y = 3x - 5
Step-by-step explanation:
You use the equation y = mx + b, and you plug in what you know. The slope is already 3 so you do y = 3x + b
after that, you plug in y and x, because (2,1) are the values of x and y.
1 = 3(2) + b
1 = 6 + b
subtract 6 from both sides to isolate the b
-5 = b