Question

help geomtry

Answer 1

Can we work through it step by step how you got midpint 7 please?

Answer 2

Do you know the formula to obtain the middlepoint?

Answer 3

uh no.

Answer 4

Well, it's easy, I write you,
\[PB_m=\frac{P+B}{2}\]

Answer 5

ok got that

Answer 6

You can also make it graphically. In a straight line divide in parts from -2 to 12. You'll see that the midpoint is in 5.

Answer 7

John_ES is the formula the same when both points are positive?

Answer 8

Can you like do it step by step?

Answer 9

Yes, the formula is the same no matter what sign the points have. In this case,
\[P=-2,\ \ B=12\Rightarrow PB_m=\frac{12-2}{2}=10/2=5\]

Answer 10

Also, graphically,
-2,-1,0,1,2,3,4,5,6,7,8,9,10,11,12
You'll see that the point that is in the middle is 5 (from -2 to 5 there are 7 steps, from 5 to 12 there are also 7 steps).

Answer 11

so 5 is my answer?

Answer 12

Yes, because is the number that is in the middle.

Answer 13

can u help me with 2 more please?

Answer 14

Ok, let's go.

Answer 15

You should apply the same formula, but in this case you want one of the points.
\[(-1,0)=\frac{(x,y)+(5,2)}{2}\]Could you finish form this point?

Answer 16

well im little confused.

Answer 17

can u walk me thru it?

Answer 18

You need the point of one endpoint, we named (x,y). Using the equation I wrote before, you'll have,
\[(-1,0)\ \text{the middlepoint}\]\[(x,y)\ \text{our wanted endpoint}\]\[(5,2)\ \text{our given endpoint}\]
Then we apply the formula,
\[\frac{(x,y)+(5,2)}{2}=(-1,0)\Rightarrow {(x,y)+(5,2)}=(-2,0)\Rightarrow\\\Rightarrow(x,y)=(-2,0)-(5,2)=(-7,-2)\]

Answer 19

is (-7,-2 the answer?

Answer 20

????

Answer 21

Sorry, I went out. Yes this is the answer ;).