Given the system of equations, what is the solution?
x + 3y = 5
x - 3y= -1
o {(-4,-3)
{(2,113
O {(-2, 3)

The solution for the given equations  x + 3y = 5 and x - 3y = -1 are x=2 and y=1.

Step-by-step explanation:

The given is,

           ......................................(1)

           ....................................(2)

Step:1

         By elimination method,

        Subtracting Equations (1) and (2),

             ( - )

           ( ) + ( ) = ( )

                                        = 6

                                          = 1

Step:2

        Substitute the value of y in equation (1),

                        + ( 3 × 1 ) = 5

                                      = 5-3

                                      = 2

Step:3

        Check for Solution,

        Substitute the values of x and y in Eqn (1),

                           2 + ( 3 × 1 ) = 5

                                         5 = 5

Result:

       The solution for the given equations  x + 3y = 5 and x - 3y = -1 are x=2 and y=1, by elimination method.

3. parallelogram

step-by-step explanation:

we turn each of our sides into direction vectors

ab=b-a=(3 - 7, 1 - 0) = (-4, 1)

bc=c-b=(1,6)

cd=d-c=(4,-1)

da=a-d=(-1,-6)

we see how the opposite sides have negated direction vectors; this is characteristic of a parallelogram.   we have congruent sides ab=cd and bc=da with unequal lengths because 1^2+6^2 is different from (-4)^2+1^2.   so it's not a square or a rhombus.  

we check the dot product of direction vectors of adjacent sides.   we have

ab dot bc = -4(1) + 1(6) = 2

that's not zero so the sides are not perpendicular.   we've ruled out rectangle.

the direction vectors indicate two pairs of congruent parallel sides, so we choose parallelogram over trapezoid.

this is answer of 144 cubic meters