Answer:
y=2
perimeter=28
Explanation:
a rhombus has all 4 sides equal
because of this, we can set 2y+3 equal to 9-y.
2y+3 = 9-y
+y +y
3y+3=9
-3 -3
3y=6
/2 /2
y=2
now we can plug y into the sides. we only need to do it once because all sides are equal.
2(2)+3
4+3
7
one side is 7. we must find all sides.
7+7+7+7 = 28
the perimeter is 28.