Here's the question you clicked on:
goldyyy
anybody wanna help?
The answer is D. I know this because all you have to do is use a calculator, and fill in the x and y values in the equation from your answers, and see which one adds upp..(:
in an ordered pair, the first number is the value of x and the second one is y, so, just put the value of x and y and see which gets u 5 ..... *sshhh* its the last one :P
ok thanks! i have more questions if you want?! :)
You should totally give me best response and I will help you(:
@Heyy_Girl_Heyy errmm...u might wanna check your calculator again, its not D.
wait so is it the last one? @Heyy_Girl_Heyy @tanvirms
Umm, yeah. It kinda is
yes.... 2.(3) + (-1) = 5 or, 6-1=5 or, 5=5
Yes. Fill in the numbers and see what you get.
So @tanvirms , How was I wrong?
@Heyy_Girl_Heyy its the last one, E :) put the values yourself and check.
Yeah, that's what I said.
YOU GUYS ARE CONFUSING ME lol
The answer is the last equation
@Heyy_Girl_Heyy hey im totally sorry :P i messed it up with someone else's question with 5 options....it has 4...sorry!!!!
OMG peoples. It's (3,-1)
Lol, you're okay. I understand..
ahahha anyways here's the 2nd question
LOL!! I sent when yours came in
@goldyyy seriously?? just count!!! 2 on the right means 2, and two down means -2, so its (2,-2)
number 3................ and @tanvirms i wasn't looking at the questions i'm just posting them :P
@goldyyy , do you go to Connections Axademy?
@goldyyy :P if you look at em, im sure you wont find any that u cant solve.
i go to ohio virtual academy @Heyy_Girl_Heyy
I'm gonna agree with @tanvirms on this at least look at em first
It is just like the other problem, figgure it out/
Just fill in the answer choices into the x and y values. See which one adds up.
sorryyyy wasn't looking at them :/ but i'll look at 'em now and i'll post the ones i don't know
well idk this one cuz i don't get slopes :/
I can explain slopes if you want me to
I know the answer, but I want to make sure you UNDERSTAND the material.
it ascends from left to right, which means it has a positive slope...with this info, u can eliminate 2 answer choices :) (elimination is a wonderful strategy for SAT)
rise/run from one point to the next: how many units up (if its down its negative) over how many units right (left means negative)
Okay, so when you are doing slope, you use rise over run. Rise is the up or down along the grid, and run is side to side across the grid. So you will measure you r rise )Up or down motion) as opposed to your run(Side to side motion) count how many there are and thats your answer
O meant how ever many units up or down and across from each point is your answer.
equation for slope: \[m = \frac{ y_{2}–y_{1} }{x_{2}–x_{1}}\]
No, it will be in the form of a frac tion
so is it always in fraction form?
it doesnt need to be fraction...it can be any number.
Well, in this case it would be a fraction, correct?
yup...basically, when the run is greater than the rise, it has a chance to be a fraction.
and for number 3, i tried all the answers but they all equaled 24 or -24 and 26 or -26
hmm, the same thing happened with me. I am not sure.
intercept is the point where the straight line cuts the axis...so, x intercept means that value of x for which y=0, and y intercept means that value of y for which x=0....try solving
No, she is tal;king about #3 @tanvirms
that's what im talking about too
would it be B because the answer is -12 and B's answer is -24 which is double?
2x-3y=-12, or, -3y=-2x-12 pr. 3y=2x+12 or, y=(2x+12)/3 now, find that value of x for which y would be 0. in this case, it is -6.... (-12+12)/3=0 similaryl, 2x=3y-12 or, x=(3y-12)/2 for y=4, x=0....so the correct answer is B,
yes so i was right! what about these?
last one got cut off so here
for the first one, do that same as @Heyy_Girl_Heyy taught u a while ago... for the second one, all u have to do is get the equation in y=mx+c form so, 4x+9y=36 or, 9y=-4x+36 or, y=-4/9.x + 36/9 or, y=-4/9.x+4
thanks for helping! and can you please explain/answer these aswell?
explain and answer them please?
@Heyy_Girl_Heyy @tanvirms @AngelicDragon ?? :D
I am kinda busy right now.
sorry i was busy a second ago
ohh ok @AngelicDragon thanks
You know if you have a graphing utility on your computer that can be a lot of help to you with a lot of these
i don't have one :/ i have to do something real quick so i'll be back in like 20 minutes
that's a good way to get them done fast in fact that's what I do
you can use Geogebra it's an online graphing thing
Q.9---what is the relationship between these two lines: 3x+6y=8 y=2x-8 as i said, try to transform the equation into y=mx+b form, the second one is already done...lets go with the first one. 3x+6y=8 or, 6y=-3x+8 or, y= -3/6.x + 8/6 or, y= -1/2.x + 4/3 what u wanna look at now is the part with x (the 'm' part in y=mx+b) and in this case it is -1/2 (u have to take it with the sign)....it is the 'slope' in case of y=2x-8 slope, m is 2, right? whats the relationship between 2 and -1/2?? -1/2 is the reciprocal of 2 with the opposite sign (u know what a reciprocal fraction is, right?) when one straight line has a reciprocal slope with the opposite sign in respect to another straight line, they are perpendicular to each other. i hope this explains.
Q. which has a slope of 5 and y intercept of -3? all of these equations are in intercept form. ( y=mx+b as i said) m is the slope b is the y intercept so what u are looking for is an equation that has m=5, b=-3 look for it!!
Q. which one is graph of inequality y<2x+3 the shaded part is the part that denotes the inequality, i guess u already know that. if there's a straight line between the shaded part and the white part, there should be a = sign in the equation....you dont see any '=' in the equation, do you? in that case, you can just eliminate B. now, the best way is to take a (x,y) pair. and the easiest to work with is the (0.0) pair. substitute the values of x and y here. 0<2.0+3 or, 0<3 which is totally true (0,0) lies in the shaded part of C, so C is the answer. sometimes, you might also have to check some other pairs (1,1) or something else too, just to be sure. if you'r wondering whether A is correct or not, take a point that lies in the shaded part, lets say it is (-2,4) (its in the shaded part, check out) 4<2.(-2)+3 or, 4<-4+3 or, 4<-1 apparently, 4 can never be less than -1. so there you go...its not A, not B...its C.
i believe we already worked on 5 and 6 a while ago...check. Q.7---a line that passes through (-2,1) and has a slope of 5. if my earlier explanations were clear enough, i believe you already know that only option A and B has a slope of 3 now, check them with the pair (-2,1). you wanna put x=-2 and y=1 and see if its true. for A, (1+1)=3(-2+2) or, 2=0 TOTALLY WRONG! for B, (1-1)=3(-2+2) or 0=0 there you go!! Q.8: what is the slope of the line parallel to 2x-3y=6 find the slope first. -3y=-2x+6 or, 3y=2x-6 or, y=2/3.x-2 so, the slope is 2/3, right?? remember what i told you a while ago? perpendicular lines have a reciprocal and opposite signed slope..... in case of parallel lines, they have the same slope. so, the answer is 2/3..
finally, i'm sorry for the late replies. i'm from Bangladesh and our time zones are totally different. it was like 2 AM in the morning and i went to bed (not to mention, i got struck by AlterBridge too. listened to them over and over again till 4 xD ).