Answer:

Step-by-step explanation:
Equation of straight line in point slope form is given as

Here

Therefore,


 
        
             
        
        
        
The value of b^2-4ac is known as the discriminant of a quadratic function, and can tell you how many roots exist of this function depending on what it is equal to.
Start by moving the -1 to the other side, as we need this function to equal zero.
2x^2 + 3x + 1 = 0
This is now the standard form ax^2 + bx + c = 0. Plug each value that corresponds into the discriminant equation. 
b^2-4ac
(3)^2 - 4(2)(1)
9 - 8
1
The value of the discriminant is 1, meaning that two real roots exist for the function described.
        
                    
             
        
        
        
Answer:
Range  = (237100, 292900)
Step-by-step explanation:
Using Chebyshevs Inequality:






Thus, 88.9% of the population is within 3 standard deviation of the mean with the Range = μ  ±  kσ
where;
μ = 265000
σ = 9300
 Range = 265000  ±  3(9300)
 Range = 265000  ± 27900
Range =   (265000 - 27900, 265000 + 27900)
Range  = (237100, 292900)
 
        
             
        
        
        
3/7 or 3:7 because you tossed the dice 7 times and got an even number 3 of those times.