math
posted by mark .
The old lion cage at the zoo was a square, with sides x meters long. For the part of the zoo's 50 birthday celecration, the zoo expanded the length and width. The expression for the total area of the new cage is (x^2+18x+81) square meters.
Part 1:Robert thinks that the cage's length had increased by 6 meters, and its width increased by 8 meters. Is Robert right?
Part 2:How much did the zoo expand the length and width?
Part 3:If the area of the old lion cage was 25 square meters, what is the area of the new cage?
I'm not sure what are the answers are. For part 1, I think Robert is wrong, because i used factoring and 6+8=14 and 6 x 8=48.
For part 2, I think the length and width are 9.
Part 3, i don't have an answer for that.

math 
drwls
Since x^2 + 18 x + 81 = (x+9)^2, the cage must still be square and increased in length of each side by 9 meters. That answers (1) and (2).
(3) If the old area was 25 m^2, the old side length a was sqrt 25 = 5 m.
Now it is 5 + 9 = 14 m
Respond to this Question
Similar Questions

French
Can someone check my work? I'm trying to say: "He was at the zoo and a lion jumped out of the cage and attacked him." This is my attempt. Could you please fix any mistakes? 
convert money (practice)
In 2005 admission to the Bronx zoo was $6 for a child and admission to the toronto zoo was 11 candian dollars. Using the exchange rate of 1.2403 candian dollars per U.s dollar which zoo's admission costs more in U.S dollars. I think … 
English
I included other speech acts. Thank you. 1)“How would you like to go to the zoo? 
Law/421
If a zoo houses a venomous snake and the snake escapes its confines leaving the zoo and gets into a neighbors yard striking a young child. Should the zoo be considered negligent or should the zoo be considered strictly liable . Why … 
math
the entrance fee to the zoo is $3,and to get into the gardens is $2.A ticket to get into both is $4. One day 900 people were at the zoo and 700 in the garden.If 500 people visited only the zoo,what was the total amount of money collected … 
math
Jenna's sixthgrade class is taking a bus to the zoo. The zoo is 156 miles from the school. If the bus travels an average of 55 mi/h, about how long will it take to get to the zoo? 
algerbra
sasha researched the size of zoos in her state. she found that the zoo in the north part of the state is almost twice as large as the zoo in the south. she also found that the zoo in the south part of the state has 200 fewer than twice … 
math
In a zoo, 21% of the animals are reptiles and 11% are birds. There are a total of 1,500 animals in the zoo. Which proportion can be solved for r, the number of reptiles in the zoo? 
English
Which of the following sentences uses a predicate adjective? 
Mathematics question
A zoo keeper weighed some of the animals at Melbourne Zoo. He found that the lion weighs 90 kg more than the leopard, and the tiger weighs 50 kg less than the lion. Altogether the three animals weigh 310 kg. How much does the lion …