El largo de un terreno rectangular es 42 cm más que dos veces su ancho. El perímetro es
624 cm.

Ancho:   x

Largo:  2x + 4  

PERÍMETRO DEL RECTÁNGULO:

                        P = 2(Largo) + 2(Ancho)

luego pasa por este:

          32 = 2(2x + 4) + 2x

          32 = 4x + 8 + 2x

          32 = 6x + 8

     32 - 8 = 6x

          24 = 6x

       24/6 = x

            4 = x

Lo cambias por este:

Ancho:   x = 4 pies

Largo:  2x + 4 pies = 2(4 pies) + 4 pies = 12 pies es de PERRITOS1000

Step-by-step explanation:

step-by-step explanation:

12: 00 p.m. to 7: 00 p.m. is a total of 7 hours.

4: 00 p.m. to 7: 00 p.m. is a total of 3 hours.

this means that from 4: 00 p.m to 7: 00 p.m. this represents 3/7 of what was lost from 12: 00 p.m. to 7: 00 p.m.

after knowing this, after doing 11,600 - 6,800 = 4,800

4,800 represents 3/7 of what was lost for 7 hours.

we then divide 4,800 by 3 which gets 1,600.

because we know that 1,600 represents 1/7 of how much water was lost, we just have to multiply by 7, which gets 11,200.   after adding 11,200 to how much water was left at 7: 00 p.m. which was 6,800. 11,200 + 6,800 = 18,000

this means that the pool originally had 18,000 gallons in the pool.

you can also check your work by doing 18,000 - 4(1600), which becomes           1800 - 6400 which gets you 11,600.