Question

I really need help on a problem. Can anybody lend a helping hand?

Answer 1

your question please ?

Answer 2

@bvillaace you there ?

Answer 3

._. Please just post your question. No one will be able to help you if you don't post it.

Answer 4

Line BC contains points B (4, −5) and C (3, 2). Line DE contains points D (2, 0) and E (9, 1). Lines BC and DE are

Answer 5

parallel

perpendicular

neither

Answer 6

You must try to calculate the slope of each line and then compare them.

Answer 7

Do you know how to calculate the slope of a line ?

Answer 8

no. how do i do that?

Answer 9

Okay, if I am given a line containing two points \((x_1, y_1)\), \((x_2,y_2)\), then the slope of the line is given by:

slope, \(\large{m = \cfrac{y_2 - y_1}{x_2 - x_1}}\)

Can you now calculate the slope of each line ?

Answer 10

yes i will try

Answer 11

good

Answer 12

slope, m= 2+5/3-4

Answer 13

slope, m= 7/-1

Answer 14

good , so, slope of first line = -7.

Answer 15

okay so slope of BC=-7

Answer 16

Yeah

Answer 17

slope, m= 1-0/9-2

Answer 18

slope, m= 1/7

Answer 19

slope of line DE=1/7

Answer 20

Good, very good

Answer 21

Now there are some important points:

(1) If slopes of 2 lines are equal, then they are parallel or coincident

(2) If the product of slopes of 2 lines is -1, then the lines are perpendicular.

Answer 22

well they are not equal and there is not 2 lines that are equal so is it neither?

Answer 23

Did you try for point (2) ?

Answer 24

When you will multiply the both slopes, you will find the product to be (-1). So, the lines will be perpendicular.

Sorry, but I have to go sleep.

Answer 25

*go to sleep

Answer 26

okay thanks and sorry, i had to clean my room

Answer 27

message me next time you are on so that if you want you can help me and i can help you if you need it