The odds are 2:4 which simplify to 1:2.
This is because there are 2 s's and 4 letters that are not 2.
c = number of children
s = number of students
a = number of adults
since the theater has a capacity of 189, then c + s + a = 189.
there are half as many "a" as "c", so then a = c/2 or 2a = c.
so the cost for all children since the price for one is 5 bucks, the total will be 5*c or 5c.
likewise, the total cost for students is 7*s or 7s.
and for adults likewise is 12*a or 12a.
we know all ticket sales was 1372, so then 5c + 7s + 12a = 1372.
now, let's use the elimination method on that system of equations of two variables, let's multiply hmmmm say the first equation by -7, to eliminate the "s".
Answer:
The correct option is C
(SEE THE ATTACHMENT)
Step-by-step explanation:
The question is unclear because the options given doesn't make any sense. We can consider the questions incomplete, After searching the internet, I found out what was the question and its options actually are. I hope it helps
(YOU CAN SEE THE ATTACHMENT BELOW)
Q) WHICH FORMULA SHOULD BE USED TO CALCULATE VARIANCE?
ANSWER)
We know that there are 2 types of variance, Population variance and sample variance. As in this question, we are considering all the values of the data to find variance. we'll find Population Variance. If we would considered only some values (sample) from the data (population), we would have considered to find sample variance.
Population Variance is given as sigma squared which is calculated by sum of square variables minus mean, divided by number of observation in population.
which is represented by option C
- h is the number of hours John works
- f(h) is the function for the amount of money John earns
with this information provided all we have to do now is substitute
so, first row:
we repeat the same process with the rest of the values
second row:
repeat that once more
third and final row:
and we're done, hope this helps. <3