What is the solution to the system of equations? {2x-2y+z=5 2x-2y+3z=7 -3x-3y+3z=9

2x - 2y + z = 5multiply by -1
2x - 2y + 3z = 7

-2x + 2y - z = -5 (result of multiplying by -1)
2x - 2y + 3z = 7
add
2z = 2
z = 2/2 = 1

2x - 2y + z = 5multiply by 3
-3x - 3y + 3z = 9...multiply by 2

6x - 6y + 3z = 15 (result of multiplying by 3)
-6x - 6y + 6z = 18 (result of multiplying by 2)
add
-12y + 9z = 33

-12y + 9(1) = 33
-12y + 9 = 33
-12y = 33 - 9
-12y = 24
y = -24/12
y = -2

2x - 2y + z = 5
2x - 2(-2) + 1 = 5
2x + 4 + 1 = 5
2x + 5 = 5
2x = 5 - 5
2x = 0
x = 0

solution is : (0,-2,1)

Answer: d. 39 cmin the diagram, the approximate length of the minor arc de is 39 centimetres.step-by-step explanation: the formula for the length of an arc in a circle is as displayed below.let the length of the minor arc de = xx = 2( pi )r × angle of sector / 360°from this, we will substitute the values given from the problem into the formula to obtain the length of the minor arc de.x = 2( pi )r × angle of sector / 360°r = radius = 25cmpi as an approximate value = 3.14angle of sector = 120°x = 2( 3.14 )( 25 ) × 120° / 360°x = 157 × 1 / 4x = 39.25x = 39 ( rounded to the nearest whole number as an approximate value )

Yes the slope to this is -5