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Line IJ has an equation of a line y=-3x-8. Which of the following could be an equation for a line that is parallel to line IJ? A. y=3x+7 B. Y=1/3x+7 C. Y=-3x+7 D. Y=-1/3x+7
srry i suck at linear algebra
parallel means that the slope is the same y = mx + b, where m is the slope if y=-3x-8, what is m?
Wouldn't M be -3?
yup, now look at the answer choices and find another equation where m = -3
Ok so it's C?
excellent work, you got it ~
Thanks!! Do you think you can help me with another one?
17.6 21.4 26.7 32.9
are you familiar with the pythagorean theorem?
a^2 + b^2 = c^2 does this equation look familiar?
No, not really but I know that perimeter you have to add all sides up
A little bit.
alright, so in order to find the length of each side, we'll use that equation let me draw the graph out to make this a bit easier
alright, let's start off by finding the length of AB the pythagorean theorem tells us that AB^2 = 1^2+4^2, so what is AB?
Would it be 17?
not quite AB^2 = 17, right? so what is AB?
Haha I typed that in on my calculator and got 17
AB^2 = 17 so AB = square root of AB^2 = square root of 17
I'm not really sure.
AB = square root of 17
right, we'll round to 4.1 for now
the answer is C due to the fact they have the same slope
C was the answer for the first question BUT we're working on another question right now
That's what I thought but how do u get C in trying to learn
C was the answer for the FIRST question, we're working on a DIFFERENT question right now...
Ok so we round up to 4.1 then what?
anyway, back to the question, we found AB, right? now we need to find BC
Ok so we do the same thing right?
yes! do you think you can try to find BC now?
I got 2
not quite... BC^2 = 2^2 + 2^2 BC = square root of BC^2
yup! ok, let's move on to the next part, CD
Well I got 8 but the square root of 8 is like 2.8237432
Ok would CD be 7?
no, please do what we did before...
CD^2 = 7^2 + 2^2
I'm not sure about CD? Sorry
it's the same process we've been doing CD^2 = 7^2 + 2^2 CD = square root of CD^2
Would it be 7.2
Now we just add all the numbers we got together
we're not done yet, we still have one more side left... AD...
Oh haha ok
once you find AD, THEN add up all the sides together and pick the closest answer (it might be a little off because of rounding)
Ok umm 6?
no, please repeat the same process we've been doing...
AD^2 = 6^2 + 4^2
alright, now add everything together and pick the closest response
Ok I got 21.1 so the closest one would be 21.4?
yup! the reason why our answer doesn't match up exactly is because we rounded a bit
THANK YOU SO MUCH!! If I had a bunch of medals I would give them to you