Answer:
Between 21 years and 75 years
Step-by-step explanation:
Given that a real estate company is interested in the ages of home buyers. They examined the ages of thousands of home buyers and found that the mean age was 48 years old, with a standard deviation of 9 years. 
X the ages of home buyers is N(48, 9)
a) 
Hence using Cheby chev inequality

b) 

c) Using normal distribution we have

d) z value is 2.97
Hence x lies between

Between 21 years and 75 years
 
        
             
        
        
        
GIVE ME BRAINLIEST PLEASEEEEEEE
Answer:
$25.00
Step-by-step explanation:
180.00-105.00=75
75.OO DIVIDED 3= $25.00
 
        
             
        
        
        
Ok so u have to multiply for this one
Work *Jake*:
So he spends 2 hours on each assignment. He has 3 assignments so u have to do :
2*3=6
 He spend 6 hours a day doing home work so now u have to multiply that by 30:
6*30=180
Work *Orlando*:
So he spends 2 hours on each homework. He has 2 sheets each do so u have to multiply 2 and 2: 
2*2=4
He spends 4 hours a day doing homwork so u  have to multiply it by 30: 
4*30=120
Answer: 
So Jake spends 130 hours
Orlando spends 120 hours 
Add both together:
120+130=250
They spend 250 hours together on work in 30 days/
        
                    
             
        
        
        
Answer:When a vertical line is placed across the plot of this relation, it intersects the graph more than once for some values of x. If a graph shows two or more intersections with a vertical line, then an input (x-coordinate) can have more than one output (y-coordinate), and y is not a function of x.
Step-by-step explanation: