Answer:
no angle c is not supplementary 
Step-by-step explanation:
  
Angle A and angle B are supplementary
  
A+B=180°   Equation 1
  
The measure of angle B is equal to four times the complement of angle A
  
The complement of angle A=90°-A
  
B=4(90°-A)  
  
B=360°-4A
  
Substitute the value of B in equation 1
  
A+360°-4A=180°
  
-3A=-180°
  
A=60°
  
The measure of angle A=60°
  
B=360°-4A=360°-4(60°)=120°
  
The measure of angle B=120°
 
        
                    
             
        
        
        
Answer:
y=29
Step-by-step explanation:
if x=5. 5x5+4. 5x5=25. 25+4=29
 
        
                    
             
        
        
        
Answer:
 
 
Step-by-step explanation:
Suppose we have a general triangle like the one shown in the figure.
We know the angle A, the angle B and the length b.

By definition I know that the sum of the internal angles of a triangle is always equal to 180 °.
So

We solve the equation and thus we find the angle C.

We already know the three triangle angles.
Now we use the sine theorem to calculate the sides c and a.
The  sine theorem says that:

Then



Also



Finally, we use the Heron formula to calculate the triangle area

Where s is:

Therefore



 
 
 
        
             
        
        
        
Answer:

General Formulas and Concepts:
<u>Pre-Algebra</u>
Order of Operations: BPEMDAS
- Brackets
- Parenthesis
- Exponents
- Multiplication
- Division
- Addition
- Subtraction
<u>Algebra I</u>
- Midpoint Formula:  
Step-by-step explanation:
<u>Step 1: Define</u>
<em>Find points from graph.</em>
Point (-3, 1)
Point (1, -4)
<u>Step 2: Find Midpoint</u>
Simply plug in your coordinates into the midpoint formula to find midpoint
- Substitute [MF]:                          
- [Fractions] Add/Subtract:          
- [Fractions] Divide:                    