Two numbers such that the greater number is 75 percent more than the lesser number
1 answer:
<h2>Greetings!</h2>
<h2>Hope this helps!</h2>
If x = the first number (equal to 1x) then the second number is 75% more than this.
This means the value of the bigger number is 100 + 75 (because 100 is the starting number and 75 is the percent bigger)
This can be shown with the following equation:
Amount *
x * = 1.75x
1.75x is the value of the bigger number.
<h2>Hope this helps!</h2>
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Given sequence:
-2,-7,-12 ,..
Unknown;
Find the sum of the first 20 terms = ?
Solution:
The sequence is -2,-7,-12 ,..
To find he sum of n-terms of a sequence, we use the expression below;
Sₙ =
where n is the number of terms = 20
a is the first term = -2
d is the common difference= -7 - (-)2 = -5
Now input the parameters and solve;
Sₙ =
Sₙ = 10(-4 + -5(19)) = 10(-99) = -990
The sum of the first 20 terms of the sequence is -990
The mean and standard deviation for the number of boys in the 950 babies are 475 and 15.41, respectively
<h3>How to determine the mean and the standard deviation?</h3>From the complete question, we have:
P(boy)= 0.5
Sample size = 950
The mean is then calculated as:
This gives
Evaluate
The standard deviation is calculated as:
This gives
Evaluate
Hence, the mean and standard deviation for the number of boys in the 950 babies are 475 and 15.41, respectively
Read more about mean and standard deviation at:
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