Answer:
if ur trying finding the y-intercept  it's -24
Step-by-step explanation:
slope- intercept form is y=mx+b we know m is 4 (7,4) 7 is the x 4 is the y ...
then you plug them in and we know 4 times 7 is 28 and then 4-s8 is -24  
 
        
             
        
        
        
A^2+b^2=c^2 so 4(4) +3(3) is 16+9= 25 and the square root of that is 5.
        
             
        
        
        
Answer:
Step-by-step explanation:0.04
 
        
             
        
        
        
Answer:
   see below
Step-by-step explanation:
Putting n=1 into the formulas eliminates the first two choices, since they evaluate to 3.57 and 0.85, respectively, not 4.2.
Putting n=2 into the formula eliminates the third choice, because you know that 4.2(0.15) < 3.57 without even using a calculator.
The only viable choice (and the correct choice) is the last one.