Area of square = l²
Perimeter of square = 4l
According to the question, 

Using zero product property,
Either, 

Or,

Since length can't be negative, 
the length is 9
 
        
        
        
Answer:
Step-by-step explanation:
steps are below
step 1
y^3-8y^2+19y=12  equation
step 2
y^3-8y2+19y(-12)=12(-12)  minus 12 from both sides
y^3-8y^2+19y-12=0
step 3
(y-1)(y-3)(y-4)=0  add brackets
step 4
(y-1)(y-3)(y-4)=0  factor
step 5
y-1=0 or y−3=0 or y-4=0  set them equal
Answer:
y=1 or y=3 or y=4
 
        
             
        
        
        
Answer:
   r equals start fraction cap a minus p over p t end fraction
Step-by-step explanation:
Subtract the term non containing r, then divide by the coefficient of r.
   
 
        
             
        
        
        
The first option is your answer. 
Sigma notation is just a fancy way to shorten a sum of a series of numbers using a set equation. The "n =" tells you where to start in the sequence and the top number tells you where to stop. 
        
             
        
        
        
Answer:
Answer to question 8 is : Area =1017.88 and Circumference =113.1
Answer to question 9 is: Area =490.87 and Circumference =78.54
Step-by-step explanation:
8. i just did  πr2for area and for circumference i did 2πr which is just the equation to find each
9.i found that half of the diameter is 12.5 so i did πr2 to find the Area i filled in the radius and pai and 2πr for circumference filled in the pai and radius
oh also round it if u want
plz give me brainliest and rate it that u and goodluck