geometry

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question 10 and 12

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#12 do you know slope formula?

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yeah y=mx+b

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thats slope intercept formula

like the equation you solve for a slope of the line

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y2-y1/x2-x1?

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yes

You know that the other line is perpendicular to the first line segment

what is the slope of the line segment?

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-2

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thats is the second line

the line segment points and the slope given are two different lines

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oh

do i set up an equation using slope formula

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correct but you need to take figure out the slope of the first line segment

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how do i do that

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its the opposite reciprocal of the second slope

so the negative of the number flipped

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i only have slope formula written so do i plug in my x and y values

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yes

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so itd be y-9 over 7-3

or would it be -2-9 over 7-3

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no

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then how shall i set it up

i know my 2 x values but dont know the second y

value

would i be 1

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how did you get 4

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its a y lol

sorry

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ohh

i see now

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m = 1/2

solve for y

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so i have y-9/4

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y-9/4 = 1/2

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i have y=-9/4

phh

ohhh

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i had -9/4 becuase its negative correct?

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that image doesnt help much

id get y=11/4

is that right

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no

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im confused

i have y-9/4 = 1/2 written down

what is my next step

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solve for y

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wait what

so its y-9 over 4

= 1/2

youd keep y because it cant change right

and the -9/4

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do youknow how to solve for y?

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dont i add the -9/4

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no never

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the y value doesn't change

you does it multiply by the recipacal to make it 4/y x y/4

cuz it just makes it 1

so it never changes

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ohh

because i multiply by recipical

can we do question 10 and then 9

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you do the opposite operation

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maybe

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okay

itd be helpful this is due tomorrow

i think for 9 i put 2 down in a equation and equal it to the other

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10 you solve for the slope y2-y1/x2-x1

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then plug in

i get 8/11

i ment 12

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which one are we doing?

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10

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yes 8/12

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i dont think i can simplify that

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now use this to find the perpendicular

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oh yes i can

i got 2/3

so eliminate 3 and 4

because the slope is 2/3

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no

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its a multiple choice question

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because we are finding the perpendicular line to that line

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i dont need to find the perpendicular bisector

it just asks which of the following would be true

and 8/12 simplifies to 2/3

so i got rid of -3/2 and -3/2

answers 3 and 4

i jsut need to find what passes through the point though

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your right

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yeah somehow

i only understand like the simple stuff

i just dont know how to find the passing through the points

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there is a few ways to do it

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is there a formula

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y=mx+b

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ohhh yeah i forgot slope form

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well you can eliminate one of the options because you know where the highest y is

(9,10)

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so nine is my x value m is my 2/3

i put them in to ( ) this right

like 2/3(9)

would it be 2

because 2/3(9) is 6

so 6 would be my x value

right

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i got 6

2/3(9) is 6

so would that be my b value

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no

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oh

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ohhh

then i plug in 4

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b = 4

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okay

so how do i put it back into the equation or dont I

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ohhh

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now look at your answers

plug in the 3 for x and 6 for y

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i got 6

so 6/6 is 1

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no

is 6 = 6

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so would it be number 1

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no

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oh

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humor me is, 6 = 6

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man im confused now

so i have 6=2/3(3)=4

and 6 = 6

what do i do now

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yeah i have that

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what does 2/3 times 3 + 4

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6

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ok

and y = 6

so you have 6 = 6

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so its number 1

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yes

the answer is number one

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bc the value of y is 6

i said that early

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see lol

i think for 9

i add 2 of the angles then set it equal to another

or i add all 3 and set it equal to 180

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no

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how would i do it

ohhhh

i need to find x and the numerical value of angle mpq

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ohhhh

okay okay

x=16

and then do i plug x into 3x-5

angle mpq = 43

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x = 16 yes

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okayy

thank you for the help