Let me walk you through this real quick:
-4x + 9 (10x - 1)
-4x + 90x - 9 (open up the brackets)
90x - 4x - 9
= 86x - 9
Midpoint of (x1,y1) and (x2,y2) is

so the midpoint of HX is the mdpoint of (13,8) and (-6,-6)
which is



the midpoint is (3.5,1)
Answer:
Please see attachment
Step-by-step explanation:
Please see attachment
Answer:
Step-by-step explanation:
Okay first I will do is the mean.
73+77+85+84+37+115= 471
Then divid it by how many numbers. so, 6.
471 divided by 6 = 78.5
Mean is 78.5
~~~~~~~~~~
How to find the median
order them least to greatest.
37, 73, 77, 84, 85, 115.
The middle number is 77 and 84.
median: 80.5
mean: 78.5
Answer:
The correct answer is "664".
Step-by-step explanation:
The given values are:
Margin of error,
E = 5%
i.e.,
= 0.05
Level of confidence,
C = 99%
i.e.,
= 0.99
Level of significance,
α = 0.01
From the z value table,
Critical z = 2.576
As we know,
The required sample size n will be:
= 
On substituting the values, we get
= 
= 
= 
= 
i.e.,
= 