The first A because once you plug in the numbers into the x,y it is easier to find the solution.
Answer:
See explanation below.
The selection of drop down arrows from top to bottom should be:
5; 4; 1; 2; 3
Step-by-step explanation:
Quadrilateral with exactly ONE set of parallel sides: Trapezoid (option 5)
Parallelogram with 4 congruent (equal) sides and 4 right angles: square (option 4)
Quadrilateral with 2 pairs of parallel sides (notice no reference to angles between sides and constrain about similarity in side length - so this os the most general description): parallelogram (option 1)
Parallelogram with 4 right angles (notice no constrain about the length of the sides): rectangle (option 2)
Parallelogram with 4 congruent sides (notice there is no constrain about the angles between the sides): rhombus (option 3)
There are at least two different things that could go in
the blank spot and make the equation a true statement.
It could be " - 2 " .
It could be " · 4/3 " .
It could be " + 2 cos(π) "
etc.
Answer:
(-2,-1,-3)
Step-by-step explanation:
5x-4y-3z=3
x+y-z=0
x=3y+1
Multiply the second equation by -3
-3(x+y-z)=0*3
-3x-3y+3z =0
Add this to the first equation to eliminate z
5x-4y-3z=3
-3x-3y+3z =0
--------------------
2x-7y =3
Substitute x =3y+1 into the above equation
2(3y+1) -7y=3
Distribute the 2
6y +2 -7y = 3
Combine like terms
-y+2 =3
Subtract 2 from each side
-y+2-2 = 3-2
-y = 1
Multiply by -1
-y*-1 = 1*-1
y =-1
We need to find x
x=3y+1
x =3(-1) +1
x =-3+1
x= -2
Now we need to find z
x+y-z=0
-2+-1-z=0
-3-z=0
Add z to each side
-3-z+z=0+z
-3=z
x=-2, y=-1 z=-3
(-2,-1,-3)
