What shape has four sides all the same length but has no right angles?

X+ y = 5 ; x - y =3 solve using linear combination

Three baby penguins and their father were sitting on an iceberg 0.50.50, point, 5 meters above the surface of the water. the father dove down 4.74.74, point, 7 meters from the iceberg into the water to catch dinner for his kids. what is the father penguin's position relative to the surface of the water?

Which equation can be solved to find x the measure of jk in the apex