Answer:
Step-by-step explanation:
Since it is a square, all four sides are equal and its perimeter is just
P=4s, so if P=8 then
4s=8, dividing each side by 4 we get
s=2
So each side of the plastic square is 2 centimeters.
 
        
                    
             
        
        
        
Answer: No
Step-by-step explanation:
Is 1/4 (8y -12) equivalent to 2y - 12? No. 1/4 (8y-12) equals out to 2y-3 not 2y-12. To solve the system of equations below, grace isolated the variable y in the first equation and then substituted into the second equation. what was the resulting equation? 3y=12x x^2/4+y^2/9=1
 
        
             
        
        
        
Answer:
X is the GPA 
Y is the Salary 
Standard deviation of X is 0.4
Standard deviation of Y is 8500
E(X)=2.9
E(Y)=47200
We are given that The correlation between the two variables was r = 0.72
a)


So, slope =  15300
Intercept =  2830
So, equation : 
b) Your brother just graduated from that college with a GPA of 3.30. He tells you that based on this model the residual for his pay is -$1880. What salary is he earning?

Observed salary = Residual + predicted = -1860+53320 = 51440
c)) What proportion of the variation in salaries is explained by variation in GPA?
 The proportion of the variation in salaries is explained by variation in GPA = 
 
        
             
        
        
        
Answer: x^2+5x+6
Step-by-step explanation:
 
        
             
        
        
        
X-3y=18
X always has a 1 in front of it so
1x-3y=18
-1x      -1x         You will have to get -3y by its self.
-3y=-1x + 18      when you move 1x over the = it turns into a -1x
/-3    /-3      /-3      divided everything by -3 to get y by its self
Y= 1/3 - 6            and that is you answer