is not included as a rational number !
<u>Step-by-step explanation:</u>
Here we have , following expressions & we need to identify which of the following is not a rational number . Let's find out:
We know that , Rational Number : A number which can be expressed in form of p/q , where q is not equal to zero !
Here Expressions are:
:
Let's evaluate this expression
⇒ 
⇒ 
Therefore , It is a rational number ! .
:
Let's evaluate this expression
⇒
Therefore , It is a rational number ! .
:
Let's evaluate this expression
⇒ 
⇒ 
Therefore , It is a rational number ! .
- :
Let's evaluate this expression
⇒
⇒ 
Therefore , It is not a rational number , as pi is included ! .
Answer:
B) 450 words in 6 minutes
Step-by-step explanation:
450 divided by 6 is equal to 75 which makes 75 words per minute. Then if you divide 300 by 4 it also is 75 words per minute.
True. A rational number is a number that can be put into a fraction and all real numbers can in the form of x/1
Answer:
t α 1 /r ; t = k/r
Step-by-step explanation:
Given that :
Time taken, t varies inverse as rate, r
MATHEMATICALLY,
t α 1 /r
Hence,
t = k/r ;
Where, k is the proportionality constant
Hence, the situation could be expressed as :
t = k/r OR
t α 1 /r
Answer:
Step-by-step explanation:
x² - 7x - 18 = 0
Product = -18
Sum = -7
Factors = 2 , (-9) {2*(-9) = -18 & 2 +(-9) = -7}
x² + 2x - 9x - 18 = 0
x(x + 2) - 9(x + 2) = 0
(x +2)(x - 9)= 0
x + 2 = 0 ; x - 9 = 0
x = -2 ; x = 9
x = -2 , 9
Sale price = 272000
Reduction percentage = 15%
Let the original price = x
Reduction = 15% of x
Original price - reduction price = Sale price
x - 15% of x = £272000
x = 3200 * 100
Original price = £320000
