Answer:
z=12
Step-by-step explanation:
z+15=27
move constant
z=27-15
z=12
Answer:
The solution is: x = -1, and y = 8/3
Step-by-step explanation:
Notice that the system of equations can be easily solved via the "elimination" method, by subtracting term by term one equation from the other. Doing such will remove completely the term in "y" (since the terms in "y" are exactly equal in both equations), and leave only an equation containing "x", for which the value can be solved:

Now we use this x-value in either equation to solve for y:
This is the graph of a symmetrical normal distribution curve ( a.k.a bell curve). It is perfectly symmetrical with respect to the mean.
<em>So, with respect to which value is the graph symmetrical?</em>
<em>50, as seen in the graph.</em>
So, the mean is 50.
ANSWER: 50
The correct answer is 2,600