Answer:
he started with either 20 or 15 i probably thought about this way to much so this is the best i could come up with
Step-by-step explanation:
 
        
             
        
        
        
Answer:
100 is grace's initial amount. w is how much of the substance is being decrased each week. in ryan's equation, 1 is 100% of the substance, so the initial amount, and 0.4 is the amount that is being decreased.
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer:
The sprinkler can spread water 18 feet away.
Step-by-step explanation:
We are given the following in the question:
Area formed by watering pattern = 1,017.36 square feet
We have to find the how far the sprinkler spread the water.
The sprinkler covers a circular area. We need to find the radius of this circular area to find the how far the sprinkler spread the water.
Area of circle = 

where r is the radius of the circle.
Putting values, we get,

Thus, the sprinkler can spread water 18 feet away.
 
        
                    
             
        
        
        
Answer:
y + 1 = 7(x + 2).
Step-by-step explanation:
Point slope form:
y - y1 =m(x - x1).
Here m = 7 and (x1,  y1) = (-2,  -1)
So the answer is;
y - (-1) = 7(x - (-2))
 
        
             
        
        
        
Answer:
89 2 irrational roots
Step-by-step explanation:
The discriminant Is b²-4ac when the equation is in the form 
ax²+bx+c so in the equation 
a=2 b=5 and c=-8 
plug into the equation for the discriminant 
so 5²-4(2)(-8)
25-(-64) 2 negatives make a positive so
25+64=89
since 89 isn’t a perfect square 2 irrational roots