Kelly wants to create a rectangular playpen for his cats in his backyard, and estimates that the cats will need 500 square feet. he also wants the length of the playpen to be 20 feet longer than the width, so they have room to run. what dimensions should the playpen be?

Assuming that x = width 
the length would be = x+20

x (x+20) = 500
X^2 +20x - 500 = 0

Based on the equation above, you can find the x which will became the width and then added that width with 20 and you find the length

hope this helps

38+105= 143, 39+104=143, and you will find then adding the numbers on opposite sides, moving inwards yields the answer 138 every time. because of this, you’re going to multiply 138 times the number of pairs, which is 34. therefore, 34*138= 4692(i’m sorry if it’s the wrong numbers, but it’s the right concept)