Question

geometry!!!!

Answer 1

hint: A and B are adjacent angles so

4x - 9 + x - 1 = 180

solve for x

Answer 2

can we go over this tomorrow, my brain is out of juice

Answer 3

sure

Answer 4

Combine "like terms" on the left side of 4x - 9 + x - 1 = 180. Then solve the resulting equation for x.

Answer 5

@Vocaloid im back

Answer 6

Do what @vocaloid and @mathmale said and solve for x in the equation
4x - 9 + x - 1 = 180

Answer 7

Combine "like terms" on the left side of 4x - 9 + x - 1 = 180. Then solve the resulting equation for x.

Answer 8

Do you need help solving for x?

Answer 9

Hint: 4x and x are "like terms"

Answer 10

Combine them.

Answer 11

does x equal 1

Answer 12

the only reason im confused is becuase ive never done a problem similar to the one above where i have to solve for x

Answer 13

Not quite. Do the problem again, but write every step down here so I can correct you if you make a mistake.

Answer 14

I'll get you started.
4x - 9 + x - 1 = 180 - Combine like terms
5x-10=180

Answer 15

What would be next?

Answer 16

subtract 10 from both sides?

Answer 17

Correct. What do you get?

Answer 18

ok but do i subtract 10 from 50 or 180

Answer 19

I meant to say add 10 on each side.

Answer 20

If you had 5x-10=180, then you need to add 10 to both sides

the "add 10" undoes the "minus 10"

Answer 21

Sorry, that's my fault. Like @jim_thompson5910 said, you add 10 on each side
5x-10=180
+10 +10
5x=190

Answer 22

^im aware of how it undoes the minus 10 but what im asking is what other side am i taking it from

Answer 23

The first one

Answer 24

you only add 10 once per side

Answer 25

think of it like you're balancing a scale

http://www.eduplace.com/math/mw/background/5/02/graphics/ts_5_2_tt-1.gif

Answer 26

ok i got x=38

Answer 27

`ok i got x=38`
correct

now use this to find the measure of angle A

Answer 28

so does this mean that b = 38 or do i need to plug it in

Answer 29

the teacher gave you
measure of angle A = 4x - 9

replace every copy of x with 38 and simplify

Answer 30

measure of angle A = 4x - 9
measure of angle A = 4*38 - 9
measure of angle A = ???

Answer 31

A=143

Answer 32

`A=143`
correct, that's the measure of angle A

Answer 33

ok thank you