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PSAT 1.34 Math Diagnostic 186 Views
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Description:
PSAT 1.34 Math Diagnostic. Which of the following equations best represents circle K?
Transcript
- 00:00
Sorry And here's your smoked You sure Brought to you
- 00:04
by the circle k ranch and a dairy farm where
- 00:07
every animal is circle shape It makes milking cows a
- 00:11
real challenge All right check out this craft circle k
- 00:15
is shown in the coordinate plane above Went to the
Full Transcript
- 00:17
following equations Best represents circle k and hear potential answer
- 00:22
Who were smelling blood gratings here already Well before we
- 00:25
do anything at all even put on our shoes Come
- 00:28
on now you missed your window We'll need to recall
- 00:30
that standard equation for us Circle for the forgetful and
- 00:33
absent minded Here it is x minus h squared plus
- 00:37
y minus k squared equals r squared That thing where
- 00:40
the center of the circle is point h k in
- 00:43
the radius is our we've been given the circle center
- 00:45
as indicated by this lovely blue dot here And it
- 00:48
looks like it's located at point three Negative six so
- 00:52
we can now plug in three for age and negative
- 00:54
Six Four k Watch the signs when we plug in
- 00:57
negative six for k we're taking why Minus negative six
- 01:01
which is the same as y plus six so that
- 01:03
gives us x minus three squares plus y plus six
- 01:07
squared equals r squared Okay we're making some headway here
- 01:10
Incidentally if you're wondering what's ahead weigh about eighty pounds
- 01:13
all right now we need some point on circle so
- 01:16
we can determine the radius Well if we go seven
- 01:19
along the x axis then down six boom there we
- 01:23
go Seven negative six is one such point now since
- 01:26
we know that the radius is the distance from the
- 01:28
centre to any point on the circle We can also
- 01:30
deduce that the radius is four because seven right here
- 01:34
minus three right here equals four Well now we have
- 01:37
everything we need right the equation for this particular circle
- 01:40
This is what it looks like X money three squared
- 01:42
plus why plus six forty full sixteen which is option
- 01:47
c our final answer All right we gotta run Looks 00:01:49.977 --> [endTime] like a few of our horses got loose
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