I think it’s 21 not sure because I did 9 more than 4 times which is 9*4 =36 then u subtract 15 less which would be 36-15 which equals 21
you can use 363 divide by 3 which is 121
Answer:
Option (a) is correct.
The system of equation becomes

Step-by-step explanation:
Given : Equation 
We have to construct a system of equations that can be used to find the roots of the equation 
Consider the given equation 
To construct a system of equation put both sides of the given equation equal to a same variable.
Let the variable be "y", Then the equation 
becomes,
Thus, The system of equation becomes

Option (a) is correct.
Answer:
A) 0.028
Step-by-step explanation:
Given:
Sample size, n = 115
Population parameter, p = 0.1
The X-Bin(n=155, p=0.1)
Required:
Find the standard deviation of the normal curve that can be used to approximate the binomial probability histogram.
To find the standard deviation, use the formula below:

Substitute figures in the equation:




The Standard deviation of the normal curve that can be used to approximate the binomial probability histogram is 0.028