3/ x -1 - 4 / x + 2=2
I work a bit backwards so, lets try looking at it like this,
3/ X
-4/X
what could X be to let these be positive since our outcome is positive?
3/0=0
4/0=0
so 3/0-1= -1
-1-4/0= 0
+2= 2
so 2=2
so now we go and fill it in to make sure
3/0-1-4/0+2=2
and it works so,
X= 0
I hope this helped some

6 0

4 years ago

After constructing a relative frequency distribution summarizing IQ scores of college students, what should be the sum of the re

saul85 [17]

Answer:

Option A. If percentages are used, the sum should be a 100%. If proportions are used, the sum should be 1.

Explanation:

The relative frequency can be measured as a ratio (proportion) or as a percentage.

As a ratio, the relative frequency is the number of times that the desired outcome is observed (either theoretically or experimentally) divided by the total number of possible outcomes (theoretically) or observed (experimentally).

As a percentage, the relative frequency is the ratio multiplied by 100.

This shows it mathematically:

relative frequency of event 1 = frequency of event 1 / number of events

relative frequency of event 2 = frequency of event 2/number of events

relative frequency of event n = freqquency of event n/number of events

Total relative frequency = sum of of relative frequencies

= sum of all (n) frequencies / number of events =

= number of events / number of events = 1

As a percentage, total relative frequency = 1 × 100 = 100

7 0

4 years ago