The answer is D..............
??? What is the rest of the question?
Let 
be the length and 
be the width of the rectangle.
Given perimeter of the rectangle
Area of the rectangle is
Also length is 5 more than twice its width,
From the above equations
Now 
The dimensions of the rectangle are length 
, and width 
.
Answer:
8x-y=19 is already in your Ax+By=C form
For your second one you need to switch your x and y around so
3x+y=7 gives you your Ax+By=C form
Now you want to use the system of elimination to solve the system of equations
So when you take 8x-y=19 you then add 3x+y=7
8x+3x= 11x
-y+y=0 (crosses out... why it's called elimination)
19+7=26
Your equation is now 11x=26
You then divide both sides by 11 to get
x=26/11
(Hope this helps ya ;)
The answer is #1. The mean of Team A is less than the mean of Team B, and the standard deviation of Team A is greater than the standard deviation of Team B.
