Question

Can someone tell me if this is right? Ill attach a picture below. My answer is CD AB AC BC. Fan + medal

Answer 1

this problem is completely unfair

Answer 2

the length BC has two different values when you break up the quadrilateral into 2 triangles

Answer 3

^^^

Answer 4

here's an image showing what I mean

Answer 5

yeah i know so i dont know how to solve it

Answer 6

oh wait, I think I made an error, one sec

Answer 7

I dont know ive been asking about this and everyone has gotten different answers

Answer 8

yeah I messed up with the construction, but I know how to fix it

Answer 9

ok I fixed it

Answer 10

and using the distance/length feature that is part of geogebra, I get this

Answer 11

Thank you!

Answer 12

Can you help me with this too?

Answer 13

m = -9 is the given slope
(x,y) = (-1,-2) is the given point the line passes through

use y = mx+b and those 3 values given above to find b

Answer 14

-2=-9(-1)+b is that how to set it up?

Answer 15

and then B equals -4.5?

Answer 16

b is not -4.5, but you have the equation -2=-9(-1)+b set up correctly

Answer 17

is it a fraction? because I got -2=9+b and then you divide

Answer 18

you don't divide

Answer 19

-9+b is the same as b+(-9) which turns into b-9

Answer 20

so b equals -9

Answer 21

no

Answer 22

you have -2 = b-9

b = ??

Answer 23

oh sry made a typo

Answer 24

you'll have -2 = 9+b which is the same as -2 = b+9

Answer 25

solve -2 = b+9 for b

Answer 26

Thats what I got the -4.5? I'm confused lol

Answer 27

you just subtract 9 from both sides

Answer 28

you don't divide

Answer 29

i put 9 divided by -2 and got -4.5 and if i put -2 divided by 9 I get a repeating decimal?

Answer 30

-2 = b+9

-2-9 = b+9-9 ... Subtract 9 from both sides.

-11 = b+0

-11 = b

b = -11

Answer 31

m = -9 and b = -11

so the equation is y = -9x - 11

Answer 32

I thought you meant i was dividing wrong i misread that.

Answer 33

no you would divide if you wanted to undo multiplication

like -2 = -9*b

the * means multiply