Answer:
y = 17/4 + 9x/4
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer: 7,5
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer:
a. E = 50 H b. 950 dollars
Step-by-step explanation:
a. Since Rachel tutors English for 50 dollars for each hours, her rate is 50 dollar per hour. If she tutors for time, H hours, Her earning E = rate × time = 50 × H 
E = 50H. 
b. If Rachel's earnings after tutoring for 19 hours is gotten by substituting H = 19 into the equation for the earnings, E.
So, E = 50H
E = 50 × 19 
E = 950 dollars. 
So, Rachel's earnings after 19 hours is 950 dollars.
 
        
             
        
        
        
The population starts at 2000, so a=2000.
We also know that the population in 3 hours is 1000, so we can setup the equation:
      2000 b^3 = 1000
This gets us:
     b^3 = 1/2
And taking the cube root of both sides gives us:
     b ≈ 0.7937005259841
Rounding that to 4 places, we have:
     f(t) = 2000 (0.7937)^t