Answer:
1. The y-intercept 8 means you start off with $8. The slope 1/4 means how much money you have to pay for the amount of tickets purchased for carnival games.
2. The y-intercept 2 means the number of chapters you started reading and the slope 5/4 means the number of chapters you read per day.
3. The y-intercept 3 means the inital (start) cost of a muffin delivery and the slope 2 means the cost of each muffin delivery for the number of muffins you ordered. 
Number 3 on the slope part might be the other way around if I'm wrong :)
 
        
             
        
        
        
Here's a pattern to consider:
1+100=101
2+99=101
3+98=101
4+97=101
5+96=101
..... 
This question relates to the discovery of Gauss, a mathematician. He found out that if you split 100 from 1-50 and 51-100, you could add them from each end to get a sum of 101. As there are 50 sets of addition, then the total is 50×101=5050
So, the sum of the first 100 positive integers is 5050.
Quick note
We can use a formula to find out the sum of an arithmetic series:

Where s is the sum of the series and n is the number of terms in the series. It works for the above problem.
 
        
        
        
Answer:
D. 15°
Step-by-step explanation:
EGF and HGF are equal and 75°
since JGH is 90° we can say JGI is 90 - 75 = 15°
 
        
             
        
        
        
Answer:
Common difference is 4 
Step-by-step explanation:
25 , 29, 33,37,41
 
        
                    
             
        
        
        
Answer:
(1  , 2
, 2  )
 )
Step-by-step explanation:
Given the 2 equations
7x - y = 7 → (1)
x + 2y = 6 → (2)
Multiplying (1) by 2 and adding to (2) will eliminate the y- term
14x - 2y = 14 → (3)
Add (2) and (3) term by term to eliminate y
15x = 20 ( divide both sides by 15 )
x =  =
 =  = 1
 = 1 
Substitute this value of x into either of the 2 equations and solve for y
Substituting in (2)
 + 2y = 6
 + 2y = 6
2y = 6 -  =
 =  ( divide both sides by 2 )
 ( divide both sides by 2 )
y =  = 2
 = 2 