Answer: GN runs between a vertex and the midpoint of the opposite side, so it is a median.
HK is an altitude because it is perpendicular to base GJ and H is a vertex.
ML is not perpendicular to a base although it does bisect a base, but anyway, neither M nor L is a vertex: ML is neither altitude nor median.
Step-by-step explanation:
"A median of a triangle is a line segment joining a vertex to the midpoint of the opposing side, bisecting it. ... Each median divides the area of the triangle in half; hence the name" Wikipedia.
Residual. Bc that diff between observed y and predicted y.
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Correct answer: Diagonals are congruent.
Answer:
(a)
(b)
Step-by-step explanation:
(a) For using Cramer's rule you need to find matrix and the matrix for each variable. The matrix is formed with the coefficients of the variables in the system. The first step is to accommodate the equations, one under the other, to get more easily.
To get , replace in the matrix A the 1st column with the results of the equations:
To get , replace in the matrix A the 2nd column with the results of the equations:
Apply the rule to solve :
In the case of B2, the determinant is going to be zero. Instead of using the rule, substitute the values of the variable in one of the equations and solve for :
(b) In this system, follow the same steps,ust remember is formed by replacing the 3rd column of A with the results of the equations: