70, 80, 90, 90, 100, 100, 100, 110, 110, 110, 110, 120, 120, 120, 120, 130, 130, 140
the answer is 110. you go from both sides taking away one at a time until you meet in the middle. in this scenario two numbers were in the middle. i added 110 and 110 and got 220. at that point you divide by two.
to visualize this:
if the problem was like this
1, 2, 3, 4, 5
the median would be three because it’s in the middle. hope this helps!
Answer:
6:9,2:3
Step-by-step explanation:
sorry I Only knew this much
Answer:
2 numbers could be 10 and 12
or - 12 and - 10
Step-by-step explanation:
let the 2 numbers be x and x + 2
since they are 2 consecutive even numbers, the difference between them is 2
the difference between the reciprocals is 1/60
we have to mulitply the 2 denominators x and (x+2) to get a common denominator for the 2 fractions
=
we can then remove the brackets from the numerator and denominator
and then cross multiply
60 * 2 = x² + 2x
120 = x² + 2x
x² + 2x - 120 = 0
we have a quadratic equation which needs to be solved
x² + 12x - 10x - 120 = 0
x (x + 12) - 10(x + 12) = 0
(x - 10) (x + 12) = 0
x - 10 = 0 or x + 12 = 0
x = 10 x = -12