What topics? and where’s your question
<span>Pick two pairs: 4x - 3y + z = - 10. 2x + y + 3z = 0. ... Eliminate the same variable from each system: 4x - 3y + z = - 10. 2x + y + 3z = 0. ... Solve the system of the two new equations: -5y - 5z = - 10. 5y - 7z = 34. ... Substitute into one of the original equations: - x + 2y - 5z = 17. ... <span>Check: Does 2(1) + 4 + 3(- 2) = 0 ? Yes.</span></span>
where is the s in here though
Answer:
A) x=5 or -11
Step-by-step explanation:
The given equation is:

The most suitable method so solve this quadratic equation is the square root method.
We take square root of both sides to obtain:



We now split the plus or minus sign to get;

This simplifies to:

The correct choice is A
Least square regressions are used to find the equation of <em>best fit between two variables</em>.
The equation of the least-squares regression line is: 
The given parameters are:





The equation of the least-squares regression line is represented as:

Where:


So, we have:






So, the equation is:


Read more about equations of least squares regression at:
brainly.com/question/2141008