Asystem of equations can be solved by which of the following methods? select all that apply.
a. matrix method
b. forward method
c. back substitution
d. inverse method

Step-by-step explanation:

If there are equations with multiple variables then we can use the substitution method to remove variables from the equations and solve them.

Matrix method is similar to the elimination method, we can represent the equations as matrix form as a ROW ECHELON MATRIX.

idk i would have to be there to under stand it

step-by-step explanation:

idk i would have to be there to under stand it

-3

step-by-step explanation:

a drawing really does here:

so i draw the horizontal line y=2 and the vertical line x=-2 at this intersection i put b (this is where my right angle is going to be).   so point b is at (-2,2).   point a is 5 units long and is also on y=2 so this point has to be (3,2) or (-7,2) -doesn't matter i will go with (3,2).

now we know c is at (-2,y) we don't know the y yet bet we know that c is on x=-2.

we have the area of the triangle is .5bh=12.5

we know the base length is 5 (ab)

we have the height is (2-y) if you look at your

plug in

.5(5)(2-y)=12.5

solve for y to get the y-coordinate for c

2.5(2-y)=12.5

divide both sides by 2.5 giving:

2-y=5

now subtract 2 on both sides

-y=3

y=-3