The mathematical expression will be (2n / n² + 7) - 3.
The mathematical expression is the combination of numerical variables and operations denoted by addition, subtraction, multiplication, and division signs.
Mathematical symbols can be used to represent numbers (constants), variables, operations, functions, brackets, punctuation, and grouping. They can also be used to denote the logical syntax's operation order and other properties.
Given that the quantity three is less than twice this number divided by the quantity 7 more than the square of this number.
The required expression will be written as:-
E= (2n / n² + 7) - 3.
Therefore, the mathematical expression will be (2n / n² + 7) - 3.
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a. Al
b. Bi
c. Na
d. Fe
Answer: 55 can not be considered a significantly high number of girls.
The probability is relevant to answering that question = .
Step-by-step explanation:
Given : For 100 births,
and .
Also it is said that consider a number of girls to be significantly high if the appropriate probability is 0.05 or less
To check :- If 55 girls in 100 births a significantly high number of girls .
We can see that
and , it means it is likely to occur 55 or more girls .
So 55 can not be considered a significantly high number of girls.
Answer:
For the first question(B)
x=-2
x=5
For part C, the question is not clear
For the last question, the approximated value is -5/4
9x2 – 25 = (3x – 5)(3x + 5)
9x2 – 25 = –(3x + 5)(3x + 5)
9x2 – 25 = –(3x + 5)(3x – 5)
Answer :
(1)
Use FOIL method to mulitply (3x – 5)(3x – 5)
(2)
Use FOIL method to mulitply (3x - 5)(3x + 5)
(3)
Use FOIL method to mulitply -(3x + 5)(3x + 5)
(4)
Use FOIL method to mulitply -(3x + 5)(3x - 5)
So equation 2 is true
3x + y = 18