Answer:
I AM NOT ABLE TO GIVE THE ANSWER OF THIS QUESTION
 
        
             
        
        
        
 
 
3x²+x-5=0
a = 3, b = 1, c= -5
-> ∆ ( delta ) = b²-4ac = 61 > 0
-> x1 =( -b+√∆ )÷ 2a =...
x2 = (-b-√∆)÷2a =...
p/s: do your teachers teach you how to use ∆ ( delta ) in maths calculation ? i live in europe and our teachers teach us that way. however, it is a rịght and fast way. you should learn it. 
 
        
             
        
        
        
Answer:
The length of the pipe = 17 feet
Step-by-step explanation:
length = 15 feet
width = 8 feet
 Pythagorean theorem,
 (diagonal)² = (length)² +(width)²            {all angles of rectangle are 90°}
                    = 15² + 8²
                    = 225 + 64  = 289 
 diagonal    = √289 = √ 17 * 17
                    = 17 feet
 
        
             
        
        
        
Answer:
68.965
Step-by-step explanation: