An irrational number can be a number with non-terminating decimals that never end
9.62681947384632928747382994(non terminating)....is an irrational number between 9.5 and 9.7
A little bit of trained eyeballing can help here. Let me tell you how I saw the answer without any computation.
Remember that the expansion of a squared binomial is
![(a+b)^2 = a^2+2ab+b^2](https://tex.z-dn.net/?f=%20%28a%2Bb%29%5E2%20%3D%20a%5E2%2B2ab%2Bb%5E2%20)
So, the square of a binomial has the following properties, which you can easily spot:
- It has three terms
- Two of them are perfect squares
- The third is twice the product of the two roots.
Well, in this case we do have three terms, and indeed
is the square of 11x, and 1 is the square of itself. The only thing we have to check is that 22x is twice the product of 11x and 1, which is true.
So, the answer is
![121x^2-22x+1 = (11x-1)^2](https://tex.z-dn.net/?f=%20121x%5E2-22x%2B1%20%20%3D%20%2811x-1%29%5E2%20)
If you want to see some explicit calculations, just use the quadratic formula
to see that there is a double solution
, and then use the formula
to come to the same conclusion.
Because people enjoy it. As of now, we’re quarantining so there’s not much else to do, yk?
Answer: C (152.40)
Step-by-step explanation: 2.54 x 60=152.40cm
The probability of selecting one student who is both from math and science is 1/10
There are the total number of student = 300
Out of which,the number of students who are only in Maths = 120
The number of students who are only in Science = 50 and the students who are not from any subject = 100
<h3>What is the formula for the
total students?</h3>
Total no of students=science student+math students +none
Therefore,the number of student who are from both math and science = Total student - Math student (only) - science student (only) - None
= 300 - 120 - 50 - 100
= 30
That is, there are 30 students who are both from science and math,
Thus, the probability of selecting one student who is both from math and science = 30/300 = 1/10
To learn more about the probability visit:
brainly.com/question/24756209