The roots, zeros, or solutions (they all means same thing) of an equation are when you graph that equation, x-intercepts are the real roots, zeros, or solutions.
Or set the y equal to zero which does the same job.
The answer is 17 and 9
Because 13-4=9 13+4=17
The frequency refers to how many times a test scores within that particular range.
To find this answer, we must divide the number of scores we are interested in by the number of total scores, aka (n/500).
We are interested in the range of 70-89, and we notice there are 2 boxes included in this range: 70-79 and 80-89.
In the 70-79 range we see that there are 172 out of 500 scores.
In the 80-89 range we see that there are 105 out of 500 scores.
If you add these scores, you are given 277 out of 500 scores, aka (277/500), which gives us 0.554
You were on the right track with the answer you chose but you just forgot to include the 80-89 range. Hope this helps!
This is how you get your answer you take 43.9 and divide it by 12.7 which gives you 3.4566 and add .52 to get 3.9766 then you multiply that number by 12.7 which gives you 50.5 so $50.5 is how much she would have originally payed.
Since it is a perfect square trinomial, it is of the form:
a^2x^2-2abx+b^2 which simplifies to (ax-b)^2
Therefore:
sqrt(a)=sqrt(25)=5
sqrt(b)=sqrt(36)=6
Plug in a and b:
(ax-b)^2
(5x-6)^2
Test to make sure it did fit the formula:
-2abx=-60 (where x is 1)
-2(5)(6)=-60
-2(30)=-60
-60=-60
Answer:
(5x-6)^2
