45 :)))))))))))))))))))))))))))))))
        
             
        
        
        
9/4x  -15     for x=4
To find this answer you must plug the 4 everywhere the x is located.
(9/4)(4)  -15
Multiply 9/4 by 4
(9/4) x 4 = 9
Now we take our 9 answer and add it to -15.
9-15 = -6
The answer is -6
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For the other equation, you also must plug in 3 where ever x is located in the equation.
5/3x -3/5
(5/3)(3) -3/5
Multiply 5/3 and 3
(5/3) x 3 = 5
Take that answer of 5 and add -3/5
5- (3/5) =4 2/5
The answer to this equation would be 4 2/5 or 4.4
 
        
             
        
        
        
Volume of prism = area of base * height
                           = area of triangle * height
         (in this case triangle)
Volume = ( 0.5*13*13)*7
             = (84.5)*7
             = 591.5
answer is C
        
             
        
        
        
Answer:
eahti-1
Step-by-step explanation: