X+4 x+1 Write an equation to determine the value of x so that each pair of polygons has the same perimeter. Then solve

Two sides of a triangle mesure 20cm and 30cm. what is the measure of the third side

Aswimming pool is a rectangle with semicircles on the end. the rectangle is 12 meters wide and 30 meters long. the diameter and width of the swimming pool are equal. sketch and label an overhead diagram of the swimming pool. find the area of the swimming pool floor.

There are 15 plates and each plate is either 7 or 12 inches diameter. which systems of equations do you use to find the number of 7 inch plates, x and 12 inch plates, y