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/sci/ - Science & Math

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1074005 No.1074005 [Reply] [Original]

Guys I need some help with a take home test. My teacher is a moron and can't teach for shit so I need some help here. I tried everything I could before asking you guys so I'm not being a lazy prick.

First, I need the distance between these pairs...

A(5, 2) and B(5, -2)

C(1, 1) and D(3, 2)

E(-4,0) and F(-6, 3)


Need this simplified

√ 100
_____
√ 2
.
.
.
√ 15 * √ 6
.
.
.
√ 5 * 45
.
.
.
√ 56
____
√ 7
.
.
.
Need these simplified by rationalizing the denominator

√ 5
___
√ 3
.
.
.
14
___
√ 7
.
.
.
3
______
5-√ 15
.
.
.
4
_______
5+√ 5
.
.
.

More next post

>> No.1074011

OP here, need work shown too.

>> No.1074007

Need these simplified


-6√ 7 - √ 7
.
.
.
2√ 3 - 3√ 3 + √ 3
.
.
.
2√ 12 + √ 3
.
.
.
√ 8 + √ 18
.
.
.
2√ 27 - 2√ 75

If anyone can help me I will love you guys forever.

>> No.1074017

Apparently you're a moron as well.

>> No.1074023

Haha oh wow. Fuck off.

>> No.1074024

>>1074017
I'm a moron because my teachers fail at teaching? Also I was out for most of the week when we learned this.

>> No.1074025
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1074025

Difference between two points: How much you need to get from point A to point B...

Did you really try everything

>> No.1074031 [DELETED] 

>>1074025
Used the formula she said, didn't work apparently.

>> No.1074030
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1074030

I spy some trolling

>> No.1074044

is this a troll or your son's elementary homework?

>> No.1074046

>>1074024
of course, its not your fault. There were circumstances.

>> No.1074048

>>1074025
I had the right answers, then she bitched how I didn't show the full work.

>> No.1074050

Distance between 2 points...OP...Open the textbook, there is a simple as fuck formula for this. Use it.

>> No.1074063

Look up the distance formula on Wikipedia. That's part A.

Part B and C needs knowledge of rules of exponents (realize that a square root is simply an alternate method of expressing a number to the one half power). Look those up.

Not sure wut do with part D.

>> No.1074065

this is 10th grade math

>> No.1074082

>>1074065
...and I'm 11th grade.


Really can someone just help me, even if not the answers can someone just explain how to do this crap?

>> No.1074080

for the distance do x1-x2, y1-y2 and find the hypotenuse

for the rest learn to factor integers... seriously this is fucking elementary

>> No.1074089
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1074089

>>1074082

>11th grade

>> No.1074091

Maths uses numbers

>> No.1074103

>>1074091
Thank you for your valuable input.

>> No.1074125

Can someone tell me how to do the last three parts...

>> No.1074143

What grade are you in OP? , i did this shit in like 8th grade.

>> No.1074148

distance has been explained

to simplify you have to know how to manipulate radicals:
for instance, sqrt 100 is the same as sqrt 25 * sqrt 5
sqrt 25 is the same as 5 so sqrt 100 can be simplified to 5*sqrt 5

to rationalize the denominator you need to take the radical out of the denominator.
since you can't actually change the number, you ahve to multiply it by 1.
obviously just doing the number*1 accomplishes nothing, so we would write 1 as something like sqrt(3)/sqrt(3)

so sqrt(5)/sqrt(3) * sqrt(3)/sqrt(3) is still the same as your original number, but now it is written as sqrt(15)/3

the other ones are simple, you just need to get them all in the same form so you can add and subtract them(2sqrt(12)-4sqrt(12) is -2sqrt(12))

>> No.1074150
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1074150

>>1074005

>> No.1074168

A-B
d=sqrt((x2-x1)^2+(y2-y1)^2)
d=sqrt((5-5)^2+(-2-2)2)
d=sqrt(0+16)
d=4

simplify
sqrt(100)/sqrt(2)
sqrt(2*2*5*5)/sqrt(2)
sqrt(2*2)*sqrt(5*5)/sqrt(2)
2*5/sqrt(2)
10/sqrt(2)

denominator
sqrt(5)/sqrt(3)
sqrt(3)*sqrt(5)/(sqrt(3)*sqrt(3))
sqrt(15)/3

the last
2*sqrt(27)-2*sqrt(75)
2*sqrt(3*3*3)-2*sqrt(3*5*5)
2*3*sqrt(3)-2*5*sqrt(3)
6*sqrt(3)-10*sqrt(3)
-4*sqrt(3)

>> No.1074179
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1074179

>>1074168
I love you...
Have a gif.

>> No.1074182

for distance, use phytagoras

>> No.1074192
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1074192

>>1074148
Love you too

Have a.... this thing.

>> No.1074197

You know, it's really sad 4chan can teach me this crap better in 20 mins rather than a teacher in a week.

>> No.1074198

>>1074168
these aren't right btw

>> No.1074213

Read your fucking textbook. I'm sure it has OVER 9000 examples of this shit.

>> No.1074314

>>1074213
It has one, and it's nothing like what I'm doing.