Question

4x-8+x+1

Answer 1

5x -7?

Answer 2

4x-8+x+1


(4x+x)+(-8+1)


5x-7


So 4x-8+x+1 = 5x-7

Answer 3

find the value of x if l and m are parallel

Answer 4

haha where exactly is x??

Answer 5

l=4x-8 m=x+1

Answer 6

l and m are lines, but you assigned numeric values to them


so are they really slopes?

Answer 7

let me draw the whole thing

Answer 8

dont go away

Answer 9

if you can, post a screenshot as they're usually much better to look at

Answer 10

does it say if l = 4x-8 is referring to its slope?

Answer 11

whoa thats sloppy but yeah

Answer 12

have any ideas>

Answer 13

lol yeah the pic is just as bad, but I think the expression are referring to the angles and not the slopes

Answer 14

ok here wait let me take anothe rpic

Answer 15

in any event, they are coincidentally equal anyway

Answer 16

this is because the two angles are corresponding angles

Answer 17

so


4x-8=x+1


Now solve for x


4x-8=x+1


4x=x+1+8


4x-x=1+8


3x=9


x=9/3


x=3


So x = 3

Answer 18

ok that's better, thx

Answer 19

thats it?

Answer 20

ok here wait i got two more

Answer 21

yep x = 3

Answer 22

so i can write on my paper what you wrote

Answer 23

k

Answer 24

ok let me post the next one k?

Answer 25

sure

Answer 26

are you sure its right?

Answer 27

yes, x = 3 is the correct answer

Answer 28

the two lines cannot be parallel since their slopes are different. That is the answer. So you cant find x.

Answer 29

those are the angles, not the slopes

Answer 30

whatever you write i write so

Answer 31

what's the relationship between angle 2 and angle 4?

Answer 32

idk thats all it has

Answer 33

well in that case u just equate them. i thought they were the equations for the lines

Answer 34

is it referring to a drawing?

Answer 35

o yeah it is

Answer 36

they r corresponding angles....thats the condition for being parallel

Answer 37

let me post it

Answer 38

any 1 from MIT here??

Answer 39

ok, angles 2 and 4 are equal. Why? Because they are vertical angles (and vertical angles are equal)

Answer 40

so this means that 10x-2 = 5x-43


solve this equation to find the value of x

Answer 41

5x+43 not -

Answer 42

oh ok thx

Answer 43

so solve 10x-2 = 5x+43 to find x

Answer 44

let me know what you get

Answer 45

hmm ok

Answer 46

wait that doesnt make sense

Answer 47

what doesn't

Answer 48

you cant minus the 10x from 2 and plus at the same time

Answer 49

that's just the expression you've been given

Answer 50

ok well can you help me a little

Answer 51

here I'll solve for x

Answer 52

10x-2 = 5x+43


10x = 5x+43+2


10x = 5x+45


10x - 5x = 45


5x = 45


x = 45/5


x = 9


So when x = 9, the measure of angle 2 is 10x-2 = 10(9)-2 = 90-2 = 88 degrees


and when x = 9, the measure of angle 4 is 5x+43 = 5(9)+43 = 45+43 = 88 degrees


So this shows that angle 2 = angle 4 (which is what we want) and they both equal 88 degrees

Answer 53

O_____o

Answer 54

I guess you just need more practice...