Im finishing up some homework before i study for my exams. Could somebody be kind enough to give me the answers to these two problems?
1. The distance a body falls varies directly as the square of the time that it falls. If it fallls 972 meters in 18 seconds how far will it fall in 2 seconds?
2. Find the equation of the line that passes through the points
(-4, -2) and (7, -5)
I love you guys very much! ^^
2007-05-16 08:01:27 · 11 answers · asked by Suzuki Uchiha 1 in Education & Reference ➔ Homework Help
For the first one, you go 972 over 18 = x over 2. Cross multiply, then solve for x.
For two, isn't there an equation x1-y1 over x2-y2 or something? That is what you would use.
Hope that helps!! It's been a while, but that's what I remember...
2007-05-16 08:06:13 · answer #1 · answered by Anonymous · 0⤊ 0⤋
Professing your love to us on Yahoo! for giving you answers to YOUR homework won't make more people want to give you the answers...but anyway lol...
1. First of all, a body?! Ahh ok lol...it will fall 108 metters in 2 seconds. The easy way to solve this would be divide 18 by 2 and get 9. Divide 972 by 9 and you get 108. Ta-da!
2. First, find the slope. -3/11 is your slope. Pick two points - I picked (-4, -2). Then it looks like this:
-3/11 = y+4/x+2
Now, cross multiply and you get...
-11y - 44 = 3x + 6
-11y = 3x + 50
Divide by -11 to get y.
y = -3/11x + -50/11
Hope this helps! ;-) Hope this is right, too lol...kind of rushing but...
2007-05-16 15:14:30 · answer #2 · answered by MW 5 · 0⤊ 0⤋
I do believe the first one would go like this,
the square of 18 sec is 324, and 972/324sec is 3.
so the square of 2 is 4 secs, and 4*3 is 12, so it should be 12 meters.
cant help with the second one though.
2007-05-16 15:12:25 · answer #3 · answered by Aurain_Lorraine 2 · 0⤊ 0⤋
1. multiply 18 x 18 and then divide by 9
2007-05-16 15:07:28 · answer #4 · answered by TAT 7 · 0⤊ 0⤋
These are 9th grade math questions? Wow, this stuff is really easy, and I am two grades below you!
1. I'm pretty sure it's 108 m/s...no, wait, I don't know this one...sorry...
2. y = -3/11 - 34/11
2007-05-16 15:10:12 · answer #5 · answered by shrad 3 · 0⤊ 0⤋
1.12
2^2 times 3
2007-05-16 15:04:51 · answer #6 · answered by essence of falling stars 2 · 0⤊ 0⤋
1. Hint....
972 = 18 squared x 3
so....
D (distance) = 2 squared x 3
2. -4x-2y = 7x - 5y
2007-05-16 15:11:01 · answer #7 · answered by Jessica L 2 · 0⤊ 0⤋
OK when you do a negative and a negative it equals a positive that's all i can give you other then that do your own work
2007-05-16 15:06:11 · answer #8 · answered by ?ohh la la? 2 · 1⤊ 0⤋
no cheating lol only jokin anit got a clue we done some mock exam to day in maths and i no i ave FAILED
2007-05-16 15:05:32 · answer #9 · answered by Emz 2 · 0⤊ 0⤋
im not sure but can u awnser all mi questions for me
2007-05-16 15:49:49 · answer #10 · answered by xsexylilgansta 1 · 0⤊ 0⤋