Question

what is the slope of the line that passes through the points (-2,4) and (8,-1)

Answer 1

IMPORTANT LINE RELATED EQUATIONS TO KNOW AND MEMORIZE

slope formula
m= slope/ gradiant -- same thing
\[m=\frac{y_2-y_1}{x_2-x_1}\]

standard formula
\[Ax+By=C\]

point-slope formula
\[y-y_1=m(x-x_1)\]

slope-intercept formula
b= y-intercept -- in the form of (0,y)

\[y=mx+b\]

Answer 2

start by finding the slope of the line

then using the slope of the line and one of the points, plug them into point-slope form

Answer 3

do you understand @Sarahneedshelp ?

Answer 4

@blurbendy no and i'm about to fail the regents and i have so many questions on this homework left #pleasehelp

Answer 5

what he is basically saying is that we need to find the slope first.
slope = y2 - y1 / x2 - x1 so let's substitute those values in with the points we have

(-1 -4) / (8 + 2) = -5/10 = -1/2

do you see how i got that?

Answer 6

@blurbendy yes actually omg, thank you can you help me with the rest of my homework?

Answer 7

sure, no problem

Answer 8

@blurbendy you're actually a lifesaver the next question i don't get is what is the equation of the line that is perpendicular to the line y-2x=4 and passes through point (2,4)

Answer 9

okay, first we need to get the equation in the form y = mx + b, so
y - 2x = 4
y = 2x + 4

now we can see that the slope is 2

however we need to the find the equation of the line that is perpendicular, and to do that we take the OPPOSITE reciprocal of the slope (2), which is -1/2

follow so far?

Answer 10

so the slope would be -1/2 and the equation would be y=-1/2x+5

Answer 11

perfect, you got 5 by substituting (2, 4) in right?

Answer 12

@blurbendy yes! i just plugged them in

Answer 13

good job

Answer 14

@blurbendy thank ya:) okay next question the diagonal of a square is 8. What is the area of a square?

Answer 15

Area of a square using its diagonal = 1/2 x d^2

can you solve from here?

Answer 16

the 'x' is times, not a variable

Answer 17

is the answer 32? or am i way off?

Answer 18

that's absolutely right!

Answer 19

oh my god yes well now we got a proof....

Answer 20

:o

Answer 21

Given: rhombus RSTV, VTX, STW, SX, VW and <RSX=<RVW Prove TX=TW

Answer 22

hmm, do you mind bumping your question? someone with better proof skills will be able to help you more than I can.

Answer 23

How do i do that?:)

Answer 24

go to the top where you had your first question. it should give you the option to bump

Answer 25

if you don't see it, then just make a new question for it

Answer 26

good luck!

Answer 27

@blurbendy can you help me with the rest of my hw?

Answer 28

ill try!

Answer 29

so, no more?