Mathematics
8 Online
OpenStudy (anonymous):
Find the x value for point F such that DF and EF form a 1:3 ratio.
0.75
−1
2
−1.75
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OpenStudy (anonymous):
OpenStudy (anonymous):
@Jim766 @imconfused33 @iambatman please help! I will write testimonial and give medal
OpenStudy (jim766):
what is point D?
what is point E?
OpenStudy (jim766):
can you look at the picture and name the two end points (X, Y)
OpenStudy (jim766):
helloooo
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OpenStudy (anonymous):
sorry not in that class yet
OpenStudy (anonymous):
sorry, and yes give me 3 minutes lol
OpenStudy (anonymous):
and thanks tho! @imconfused33
OpenStudy (anonymous):
D is -3, -3
E is 2, 4
OpenStudy (anonymous):
@Jim766
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OpenStudy (anonymous):
@Jim766 ???????
OpenStudy (jim766):
set it up like this, the last point always goes first
3 (-3, -3)
-
1 ( 2, 4 )
now mult across, like you are distributing
OpenStudy (jim766):
what is 3 * -3? and 3 * -3
OpenStudy (anonymous):
So I multiply 3 with the 2 & 4 ?
OpenStudy (jim766):
no, the 1 times the 2 and the 4
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OpenStudy (anonymous):
-9 and -9
and then 2 and 4
OpenStudy (jim766):
you will end up with (-9, -9)
( 2, 4 )
OpenStudy (jim766):
now add straight down
OpenStudy (anonymous):
Alright then what
OpenStudy (anonymous):
OH so -7 and -5
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OpenStudy (jim766):
-9 + 2
and
-9 + 4
OpenStudy (anonymous):
ok which is -7 & -5
OpenStudy (jim766):
(-7, -5) right
now divide each by the ratio added together 1:3 , 1+ 3 = 4
OpenStudy (jim766):
-7/4, -5/4
OpenStudy (jim766):
or rather
(-7/4, -5/4)
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OpenStudy (jim766):
all they care about is the x number.
OpenStudy (jim766):
what is -7/4 ?
OpenStudy (anonymous):
yayy -1.75! thanks!!!!!
OpenStudy (jim766):
it is like finding mid point, but the ratio makes it different
OpenStudy (anonymous):
ohh I see! and I have one small Q about right triangle
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OpenStudy (anonymous):
A right triangle has
three sides with the same length
two sides that are parallel
at least two congruent sides
two sides that are perpendicular
OpenStudy (jim766):
what is a right triangle?
OpenStudy (jim766):
draw one and look at it...
OpenStudy (anonymous):
I know what it is, and I didn't have to draw it either. Just wanted to know if the 3rd answer choice is corrrect or not ....
OpenStudy (jim766):
it might have 2 congruent sides, but it doesnt have to.
What does it have to have?
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OpenStudy (anonymous):
right angle ?
OpenStudy (anonymous):
oh perpendicular?
OpenStudy (jim766):
right...
OpenStudy (anonymous):
K, so D, ok thanks