Answer:
True mean/population mean
Step-by-step explanation:
The standard error in this case gives an estimate on how far the values observed during the course of the experiment ate likely to be from the true mean/population mean.
 
        
             
        
        
        
Standard Form is ax + by = c, where a, b, and c are not fractions and a is not negative.
So, you can go through each of your options to see which ones work with those rules. 
A. 2.5x + 3y = 12   No, this is not in Standard Form. 2.5 can be rewritten as 2<span>

, menaing A is a fraction, which you can't have.
B. -10x - 3y = 1   No, this is not in Standard Form. A is -10, but A can't be negative.
C. 2x + 3y = 12   Yes, this is in Standard Form. It follows all of the rules.
D. 5x + 5y = 10   Yes, this is in Standard Form. It follows all of the rules.
So, 
C and 
D are both written in Standard Form.
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Answer:
y = x/4 -1/2
Step-by-step explanation:
given coordinates : ( -2, -1 ) and ( 2 , 0 )
gradient = y2 - y1 / x2 - x1
                = 0 - -1 / 2 - -2
                = 1/4
equation of line:
y - y1 = m( x - x1 )
y - 0 = 1/4 ( x - 2 )
y = x/4 -1/2
the line shown below to confirm:
 
        
                    
             
        
        
        
Answer:
The equation given in the question matches the situation C. 
Step-by-step explanation:
A. The amount that Cindy paid for books was 15% of p i.e. it is only  
B. The amount is given to a charity after saving 15% of p. That means if p is the amount of charity, then there were a savings of 15% of p.
Therefore, the total charity payment after savings = p - 15% of p =  
C. The amount that Sandy paid for a shirt with 15% tax on p.
Therefore, if the price of a shirt is p, then total payment of Sandy after tax is = p + 15% of p =  
Hence, the equation given in the question matches the situation C. (Answer)