Answer:
The median of the given data is 700.
Step-by-step explanation:
We are given the following data in the question:
400, 600, 800, 1000
Formula:
Median =

Thus, the median of the given data is 700.
Step-by-step
=> 900=-100x+300
=> -100x+300=900
=> -100x=900–300
=> -100x=600 divide both side by -100
=> x=-6
Answer:
36
Step-by-step explanation:
This is the fraction we use to solve this problem 
Fractions are
and 
We now ask ourselves

Since whatever we do to the numerator we have to to the same to the denominator, we multiply 3 and 12

Hope this helps!
PLZZZ give brainliest
We let y equal to the elevation above sea level so that the elevation of the rock climber after x minutes of climbing would be:
y = 2x + 50
His initial height can be calculated when x is equal to zero it is when the climber is not yet climbing. Therefore, the rock climber'sinitial height above sea level would be 50 meters.