Answer:
13+11
Step-by-step explanation:
13-11=2 and 13+11=24
 
        
             
        
        
        
Answer: A
Explanation:
First you have to write the model in an equation form. 
6x+5=15
Subtract 5 from both sides
6x=10
Divide 6 from both sides
X=10/6
Simplify
X=5/3 or 1.67
        
                    
             
        
        
        
{x+2y+2z=0
{2x+y+z=3
{x-3y-z=1
{x+2y+2z=0
-
{4x+2y+2z=6
{-3x=-6  → x=2
{-3y-z=-1
+
{y+z=-1
{-2y=-2  → y=1
{2+2+2z=0 → 2z=-4 → z=-2
Final triple is
(2; 1; -2)
        
             
        
        
        
Answer: We are using a line regression tool to solve the parameters asked in the problem. We can use online tools or that of Excel. According to the tool, the best fit values are 
Slope0.3848 ± 0.03956
Y-intercept0.6053 ± 0.6370
X-intercept-1.573
1/Slope2.598
Step-by-step explanation: Best fit lines make sure that the standard deviation at each point is minimum from the best fit line.
 
        
                    
             
        
        
        
Answer: The answer to 2c+15cd+9d+12=12.