Answer:
-33/10z - 11
Step-by-step explanation:
since all of these terms are being added, there are no need for the parenthesis 
-7/2z +4 + 1/5z -15
add like terms (to add the fractions, convert them to a common denominator)
-7/2z + 4 + 1/5z - 15
-35/10z + 2/10z - 11
-33/10z - 11
 
        
             
        
        
        
There are 3 shapes present.
Triangle - 2
Circle - 4
Square - 2
Ratio of triangles to cirles: 2 triangles to 4 circles ⇒ 2/4 
2/4 simplified to 1/2.
        
                    
             
        
        
        
Answer:
D
Step-by-step explanation:
All living organisms are made up of one or more cells, which are considered the fundamental units of life. Even unicellular organisms are complex! Inside each cell, atoms make up molecules, which make up cell organelles and structures. In multicellular organisms, similar cells form tissues.
 
        
                    
             
        
        
        
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Answer:
300 dollars
Step-by-step explanation:
250 x 0.2= 50
250 + 50=300