Answer:
Vertex form:  
The vertex is 
Step-by-step explanation:
For a general quadratic function the form is:
 
For the function
 
The values of the coefficients for the function are the following:  ,
,  ,
,  
Take the value of b and divide it by 2. Then, the result obtained squares it.
 
 
Add and subtract  
 
Write the expression of the form
 
 
The vertex is 
 
        
             
        
        
        
Answer:
OOO I KNO ITS 7.2 15.6 OK 
Step-by-step explanation:
SO WHAT YOU DO IS 7.2 THEN ROUND SO THEN ITS 6 THEN 15.6 16
THEN YOU WILL DIVIDE. I HOPE THIS HELPS 
THIS IS HOW I LEARNED BUT I COULD BE WRONG.
PLZZZ BRAINLYIST!!!!
OH AND HAVE A WONDER FULL DAY
 
        
             
        
        
        
He bought 4 cards for $4 so that's 16 he put 20 in each that's 80 and 70 x 4 is 1,400 so all of that in total would be 1,436, correct me if I'm wrong, and if you're too lazy to read than, the answer is 1,436
        
             
        
        
        
Answer:
4
Step-by-step explanation:
 
        
             
        
        
        
Answer:
System of equations: 
L = 5W + 7
2W + 2L = P 
L = 62 cm 
W = 11 cm
Step-by-step explanation:
Given the measurements and key words/phrases in the problem, we can set up two different equations that can be used to find both variables, length and width, of the rectangle.  
The formula for perimeter of a rectangle is:  2W + 2L = P, where W = width and L = length.  We also know that the L is '7 more than five times its width'.  This can be written as:  L = 5W + 7.  Using this expression for the value of 'L', we can use the formula for perimeter and solve for width: 
2W + 2(5W + 7) = 146 
Distribute:  2W + 10W + 14 = 146 
Combine like terms:  12W + 14 = 146
Subtract 14 from both sides:  12W + 14 - 14 = 146 - 14 or 12W = 132
Divide 12 by both sides:  12W/12 = 132/12 or W = 11
Put '11' in for W in the equation for 'L':  L = 5(11) + 7 or L = 55 + 7 = 62.