Answer:
x = 2
y = -24
Step-by-step explanation:
The midsegment of a trapezoid connects the midpoints of its non-parallel sides, and is parallel to the parallel bases.
We are given trapezoid NSMJ with midsegment HG, where:
- MG = 18
- GS = -3x - y
- HG = 24
- NS = 6x
- KM = -y + 12
The length of the midsegment of a trapezoid is half of the sum of the lengths of the two parallel bases. Given that NS and KM are the parallel bases, then:
[tex]HG=\dfrac{NS+KM}{2}\\\\\\24=\dfrac{6x-y + 12}{2}\\\\\\48=6x-y+12\\\\\\y=6x+12-48\\\\\\y=6x-36[/tex]
As point G is the midpoint of side MS then:
[tex]MG = GS\\\\18=-3x-y[/tex]
Rearrange to isolate y:
[tex]y=-3x-18[/tex]
We have now created a system of two linear equations:
[tex]\begin{cases} y=6x-36\\y=-3x-18\end{cases}[/tex]
Substitute the first equation into the second equation and solve for x:
[tex]6x-36=-3x-18\\\\6x-36+3x=-3x-18+3x\\\\9x-36=-18\\\\9x-36+36=-18+36\\\\9x=18\\\\x=2[/tex]
Therefore, the value of x is:
[tex]\Large\boxed{\boxed{x = 2}}[/tex]
To find the value of y, we can substitute x = 2 into either of the equations for y. Let's use y = 6x - 36:
[tex]y = 6(2) - 36\\\\y=12-36\\\\y=-24[/tex]
Therefore, the value of y is:
[tex]\Large\boxed{\boxed{y=-24}}[/tex]
