Question

Geometry question, picture attached, help?

Answer 1

@jim_thompson5910 can you help?

Answer 2

if you have 2 points x and y on a number line, then the midpoint is

(x+y)/2

Answer 3

So the midpoint is 7?

Answer 4

-2+12 is NOT 14

Answer 5

My bad it's 10 so the midpoint is 5?

Answer 6

good

Answer 7

So 5 is the answer, correct?

Answer 8

yes

Answer 9

Can you help with 2 more questions?

Answer 10

sure

Answer 11

solve for x

(x+ 5)/2 = -1

then solve for y

(y+2)/2 = 0

Answer 12

Im confused. how do i solve for x?

Answer 13

(x+ 5)/2 = -1 ... Start with the given equation

x+5 = -1*2 ... Multiply both sides by 2.

x+5 = -2 ... Multiply

x = ???

Answer 14

x is 10?

Answer 15

no

Answer 16

2 times 5?

Answer 17

what undoes addition?

Answer 18

subtraction

Answer 19

yep

Answer 20

so 3?

Answer 21

no

Answer 22

im so confused

Answer 23

-2 - 5 = ???

Answer 24

oh ok, -7?

Answer 25

so x = -7

Answer 26

ok and do the same thing for y?

Answer 27

yes

Answer 28

y=-4?

Answer 29

Ok thanks so much! One more question?

Answer 30

ok

Answer 31

Last question.

Answer 32

are you familiar with the distance formula?

Answer 33

No i am not, sorry my connection keeps going out.

Answer 34

that's ok

Answer 35

I recommend you reading this page

http://www.purplemath.com/modules/distform.htm

Answer 36

to learn about the distance formula

Answer 37

Will the distance formula be needed for this problem?

Answer 38

yes it will

Answer 39

Ok one moment im gonna read that page.

Answer 40

alright

Answer 41

Ok i see the distance formula.

Answer 42

that's good

Answer 43

Ok im gonna try and work this problem out, will you correct me if im wrong?

Answer 44

sure I can do that

Answer 45

im gonna work it out in worpad and copy and paste it here.

Answer 46

that sounds great

Answer 47

This is as far as i got
d=sqrt(6-(-4))^2 + (1- (3))^2
= (6+4)^2 + (1+3)^2

Answer 48

good so far?

Answer 49

I forgot to put sqrt for the second part.

Answer 50

1-3 is not the same as 1+3

Answer 51

On the page you told me to look at the second part switched the addition.

Answer 52

the only reason why there was a sign change was because it wrote 1 - (-2)

Answer 53

that's the same as 1 + 2

Answer 54

ok, let me correct that in wordpad, one moment

Answer 55

Ok this is what i got.
d=sqrt(6-(-4))^2 + (1- (3))^2
=sqrt (6-4)^2 + (1-3)^2
=sqrt(2)^2 + (-2)^2
=sqrt4+-4=sqrt8

Answer 56

right or wrong?

Answer 57

that's incorrect

Answer 58

6-(-4) is the same as 6+4

Answer 59

1-(3) is just 1-3 = -2

Answer 60

Ok hold on.

Answer 61

d=sqrt(6-(-4))^2 + (1- (3))^2
=sqrt (6+4)^2 + (1-3)^2
=sqrt(10)^2 + (-2)^2
=sqrt100+-4=sqrt104

Is this now correct?

Answer 62

good, you can simplify that radical

Answer 63

How do i do that? I have to round to the nearest tenth, too?

Answer 64

oh no need to find the exact simplified answer

just checked the instructions again and all they want is an approximate answer

Answer 65

so just type sqrt(104) into the calculator

Answer 66

ok, thats it? Even though it asks to round to the nearest tenth?

Answer 67

yes remember to round as well

Answer 68

what is sqrt(104) equal to?

Answer 69

My calculator doesn't have a sqrt button?

Answer 70

sqrt stands for "square root"

Answer 71

look for the square root symbol

Answer 72

I know, i'm using a ipod calculator, it doesn't have the sqrt symbol, i googled it though and it said this 10.1980390272

Answer 73

good, google works too

Answer 74

that rounds to what

Answer 75

10.2?

Answer 76

very good

Answer 77

10.2 is the answer of the whole problem, right?

Answer 78

yes it is

Answer 79

Ok thanks. i have one more questions. When constructing a an angle bisector, why must the arcs intersect?

Answer 80

is that all it asks?

Answer 81

or is there more to it?

Answer 82

The last one is the one i just posted about the angles. ^^^

Answer 83

for 100 + -4 im getting 96 now instead on 104?

Answer 84

it should be 100 + 4 = 104

Answer 85

not sure how you 100 + -4

Answer 86

so that 4 shouldn't be a negative? and i got it from (-2)^2 =-4

Answer 87

and i got that from 1-3^2

Answer 88

(-2)^2 is positive 4, not negative 4

Answer 89

Sorry, my mistake. Did you see the other question i posted?

Answer 90

Also i got that -4 from a calulator, it keeps saying (-2)^2 is -4

Answer 91

that's because you said -2^2

you should explicitly type in the parenthesis to say (-2)^2 = 4

Answer 92

Oh ok, i got it now. Did you see the other question?

Answer 93

Is it because of the vertex?

Answer 94

I think it's because the two arcs must intersect to form that new point that's needed to draw the angle bisector