Answer:
450
Step-by-step explanation:
To find an area of the triangle, you must first multiply the base and the height.
 
        
             
        
        
        
Total miles:350+150=500
Total hours:4+3=7
Avg speed:500/7=71.429 mph
        
             
        
        
        
No the side lengths of 9,12, and 18 doesn’t form a right triangle. Posted a picture showing all the side length that is a right triangle.
 
        
             
        
        
        
Answer:
 8 maths tests
Step-by-step explanation:
Given data
We are told that in 1/4 hour that is 0.25hour (15 mins) She grades 1 math test
our aim is to find how many maths test she grade in 3 hours (120min)
Hence 
in  15 mins she does 1 grading
in 120 mins she does x
cross multiply 
15x= 120
divide both sides by 15
x= 120/15
x= 8 maths test
Hence in 2 hours, she can grade 8 maths tests
 
 
        
             
        
        
        
Answer:
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