The first line is perpendicular, the second line is not perpendicular and not parallel , the third line is parallel to the above line and the forth line not parallel or perpendicular to the line.
<h3>How can the slope of the line be calculate?</h3>
The slope of the line  is been given as −3x+5y=−15
Then  , hence the slope is
, hence the slope is 
- Slope of the first line 5x + 3y = 15 after calculation is 
the slope is 
this means that the line is perpendicular to the given line
- Slope of the second line  3x + 5y = 15 after calculation is 

This means that the line is not perpendicular and not parallel 
- Slope of the Third line  -3x + 5y = 15 can be calculated as 

This means that the line is parallel to the above line.
- Slope of the first line  3x + 5y = 15 after calculation is 

This means that the line is not parallel or perpendicular to the line
Learn more about slope of  line  at:
brainly.com/question/3493733
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156.25 because a square has 4 sides so it would be 625/4 which equals to the answer 156.25
        
             
        
        
        
Answer:
2 kinds of shapes are used to create the faces on this three-dimensional model.
 
        
                    
             
        
        
        
The ratio of the fraction in lowest terms is 10:9