60°; all of of the angles of a triangle add up to 180° so 180 divided by 3 equals 60°.
        
                    
             
        
        
        
Answer:
Step-by-step explanation:
I think you meant 3([7/5]x + 4) - 2(3/2 - [5/4]x).  If that's the case, then identify the LCD:  It is 20.  Multiply both [7/5]x + 4 and 3/2 - [5/4]x by 20 and then divide the resulting expression by 20:
3(28x + 80) - 2(30 - 25x)
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                20
Next, perform the indicated multiplication:
  84x + 240 - 60 + 50x
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                  20
This simplifies to:
  34x + 180        17x + 9
---------------- = ----------------
        20                  10
Next time, please share the answer choices.
 
        
             
        
        
        
Given:
f(x) = x²
g(x) = 4x²
Therefore
g(x) = 4f(x)
This means that the value of g(x) is 4 times the value of f(x). So the graph og (x) is the graph of f(x) vertically stretched by a factor of 4.
The graph shown below confirms the conclusion.
Answer: C. 
The graph of g(x) is the graph of f(x) vertically stretched by a factor of 4.