ITT: HOW SMART IS Sup Forums?
>how long does it take you to solve my little sister's math homework?
ITT: HOW SMART IS Sup Forums?
Jackson Collins
Other urls found in this thread:
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Ian Perry
>should the target start releasing the water to hit the target
Yes, absolutely. Forest fires are no joke.
Thomas Mitchell
3.369 m
Tyler Taylor
...
Nathaniel Anderson
no, its 1.68 m
Sebastian Bailey
Hahahaha... Its 6m. you can actuallyndo it in your head, nad I'm bad at maths.
Gavin Hall
what shape is the swimming pool?
Elijah Richardson
(10x2) (8x2) (the circumference of pool)
20 16 9 (adding them up)
36 (again adding up)
72/36 = 2m?
got no clue if correct but too lazy to check
Adam Sanders
So x2 + 18x - 72 = 0. Then x must be 3(√17 - 3).
Andrew Nguyen
This is right. You have basically 72=36x+4x^2. Key is the 4x^2 which are boxes of sidewalk on each corner
Isaac Martin
This user is correct
Its a ratio problem
8 x 10 = 80
72 + 80 = 152
152/80 = 1.9 Ratio of the center to outer rectangle
1.9 x 8 = 15.2 m total width of the walkway past pool
15.2 - 8 = 7.2 width of two walkway sections
7.2 / 2 = 3.6 one section of the walkway
Ethan Lewis
Key word is Uniform width
Matthew Jones
algebra.com
You can also use quadratic equation 3.6 is correct
Gabriel Lee
>So x2 + 18x - 72 = 0.
Right so far
>Then x must be 3(√17 - 3).
Its damn -9+√9=6
Ethan Murphy
Off by a factor two: x is twice the width. Width should be (3√17)/2 - 9/2 ≈ 1.6847
Lucas Hughes
How is -9+√9 not negative?
Jacob Watson
Let's check your work user
Total area of pool and walkway
15x17.2=258
Now let's subtract the area of the pool
258-80=you are retarded
Robert Gray
yeah, 1.684658
Ian Carter
bacuse its a fucking lenght. I could write it mathematically correct
|-9±√9|
Luke Price
Basically, you can cut the walkway into sections: 4 sides and 4 corners:
Area of long sides: 2*10*w
Area of short sides: 2*8*w
Area of corner squares: 4*w^2
all this adds up to 72
4*w^2 + 36w = 72
solve this however you want.
Juan Baker
you have a rectangle filled by the walkway & pool which is a wide & b long
a = 8 + x*2
b = 10 + x*2
a*b = 72 (area of walkway) + 80 (area of pool)
(8 +x*2) * (10+x*2) = 152
easy math from there
Anthony Sanders
It's fucking 2.
Luis Lopez
Ah, I'm the fucking boron that forgot the corners. I've 1.68 with what you did...
>4x^2+36x=72
>4x^2+36x-72=0
>x^2+9x-18
>-9/2±√[ (9/2)^2-(-18) ]
>-4.5±√[ 4.5^2+18 ]
>x1= 1.68 ; x2= -10.68
Testing:
>(1.68×2+8)×(1.68×2+10)-80=71.76
whats wrong with this?