Y = x^2 - 6x + 7
a = 1
b = -6
c = 7
Before you get the A.O.S, you must first solve for the vertex.
The vertex formula is \frac{-b}{2a} 
Plug in the numbers:
-(-6) / 2(1)
--6 = 6 and 2*1 = 2
6/2 
Vertex (or x) = 3
Now you have to plug in the x in order to find the vertex (or y)
Your equation should now look like this;
y = (3)^2 - 6 (3) +7
Solve each part separately and then add it up...
3^2 = 9
-6 * 3 = -18
+7
9 - 18 + 7
A.O.S (or y) = -2
        
             
        
        
        
The answer is: D)	115
 The explanation is shown below:
 1. You have that the frequency with which a cricket chirps varies directly with the temperature, which you can express it as following:
 
 Where  is the frequency with which a cricket chirps,
 is the frequency with which a cricket chirps,  is the temperature and
 is the temperature and  is the constant of proportionality.
 is the constant of proportionality.
 2.  If the cricket chirps 100 times per minute in 80° weather, you can calculate  as below:
 as below:
 
 3. Therefore, the frequency in 92° weather is:
 
 
 
        
             
        
        
        
Is this the actual question
        
                    
             
        
        
        
I=PRT
P=present amount
R=rate
T=time
basically 
20+interest<u /> is more than or equal to 400
20+I<u>></u>400
minus 20 both sides
I<u>></u>380
solve
P=20
R=3%=0.03
T=?
I=PRT
380<u><</u>I=PRT
380<u><</u>20(0.03)(T)
380<u><</u>0.6T
divide both sides by 0.6
633.33333<u><</u>T
633.33 years at least
        
             
        
        
        
Answer:
one spool of thread costs $1.89
Step-by-step explanation:
$8.99x3=$26.97
$32.64-$26.97=$5.76
$5.76 divided by 3=$1.89