PLEASE HELP ME WITH MY HOMEWORK I SERIOUSLY DONT GET IT. please show ur work :D
Pierre was born in the twentieth century and will be x years old in the year x2(x to the second power). In what year was Pierre Born?
2007-11-30 11:47:30 · 5 answers · asked by nquanghn 2 in Education & Reference ➔ Homework Help
The twentieth century means... the year 19_ _ something...
So that means that in order for x^2 to fall in the 1900-2000 range.... possible x's would be....
Well... if x = 40, then x^2 = year 1600
And if x = 50, then x^2 = year 2500
So now at least you know that x is between 40 and 50
If x = 45, then x^2 = 2025
Hmmm.... that's pretty close to the 1900-2000 that we are looking for. So he will be 45 in the year 2025. So what happens if you subtract 45 years to get the year he was born in?
2025 - 45 = 1980
He was born in 1980. This is your answer because 1980 is in the 20th century.
Hope this makes sense. It was a hard one, even for me!!! Thanks for making me think! :o) LOL That's why I gave you a yellow star. GOOD thinking question!!!
2007-11-30 12:03:43 · answer #1 · answered by blueskies 7 · 1⤊ 0⤋
So you mean he will be x in year=x^2?
Well 45x45=2025, and 2025 - 45 = 1980, it seems like a good answer.
2007-11-30 12:00:49 · answer #2 · answered by robomoza777 2 · 0⤊ 0⤋
the 20th century means in the 1900s
2007-11-30 12:05:08 · answer #3 · answered by anniegirl 3 · 0⤊ 1⤋
This doesn't give enough info. The 2oth century = the 1900's but you can't solve this problem without a specific date....
2007-11-30 11:55:12 · answer #4 · answered by Jaz 'ma' Taz 2 · 0⤊ 1⤋
LOL i have no idea....
its not enough information to be able to answer it
2007-11-30 11:56:15 · answer #5 · answered by Anonymous · 0⤊ 0⤋