Answer:
(0, -8)
Step-by-step explanation:
 
        
             
        
        
        
Step-by-step explanation:
1st 
8x-59 + 2x-11 = 180
10x -70 = 180
10x = 180 + 70
10x = 250
x = 25
2nd
8x - 59 = 15y + 6
8(25) -59 = 15y + 6
200 -59 = 15y + 6
141 = 15y + 6
15y + 6 = 141
15y = 141 - 6
15y = 135
y = 135/15
y = 9
 
        
                    
             
        
        
        
15% of what number is 36
15% of 36=5.4
        
                    
             
        
        
        
Answer:
-9 3/4
Step-by-step explanation:
The last step is to simplify the fraction into a mixed one.
 
        
                    
             
        
        
        
a function that model the number of people that receives email in week t  is  .
 .
<u>Step-by-step explanation:</u>
Here we have , Tobias sent a chain letter to his friends . The number of people who receives the email increases by a factor of 4 in every 9.1 weeks , and can be modeled by a function P, which depends on the amount of time t weeks . Tobias initially sent letter to 37 friends . We need to write a function that model the number of people that receives email in week t . Let's find out:
Basically it's an exponential function as 
 , In question initial value is 37 & and for every 9.1 weeks there is increase in people by a factor of 4 i.e.
 , In question initial value is 37 & and for every 9.1 weeks there is increase in people by a factor of 4 i.e.
⇒ 
But , wait ! People increase in every 9.1 weeks not every week so modified equation will be :
⇒  
 
Therefore , a function that model the number of people that receives email in week t  is  .
 .