I need help with a few Algebra 1 Q's in preparation for a test. It will take about 10 mins of your time, and I will fan, medal, and give a positive testimonial to anyone who is willing to help me out.

- anonymous

- Stacey Warren - Expert brainly.com

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- katieb

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- anonymous

i will try my best :)

- anonymous

Thank you! Give me a few seconds.

- anonymous

ok

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## More answers

- anonymous

1st Q: http://prntscr.com/7a1nki

- anonymous

If you don't know it, it's fine, we can move on if you'd like :)

- anonymous

I'm in algebra 2 as of now and I'm not sure of the answer lol

- anonymous

Okay! No problem. (I'm in Algebra 1) Let me get out the next Q.

- anonymous

k

- anonymous

http://prntscr.com/7a1pxw

- anonymous

It would be A. you want an explanation?

- anonymous

Yes, please :)

- anonymous

ok so the shaded part of the graph would all be correct answers

- anonymous

and A is the only ordered pairs within the shaded part

- anonymous

Oh okay, so by trial and error, one can get the correct answer easily. Thank you!

- anonymous

np

- anonymous

Q.3: http://prntscr.com/7a1r4w Are they asking for the rate of change?

- anonymous

I don't think so

- anonymous

im pretty sure its C.

- anonymous

Why is that?

- anonymous

because when i plugged in the numbers into the equation they equaled eachother

- anonymous

5 is plugged into h(5) =

- anonymous

That's a great way to solve this one! so if I plugged in 0 for x, I would get 5/1 = 5 and if h(x) = 5, then the equation is true. Thanks

- anonymous

and 0 is plugged into x

- anonymous

yep :)

- anonymous

http://prntscr.com/7a1ssa I was thinking it's either the peak or the left part

- anonymous

(Those are the only parts that make the function non-linear)

- anonymous

So it's either A or B

- anonymous

But then C also describes the peak

- anonymous

huh

- anonymous

or no sorry not C

- anonymous

Precisely... but they're asking for an interval, so it can't be C

- anonymous

Ya its a or b im not sure which one

- anonymous

I think it's A mainly because the function would have been in a triangle shape if not for the discontinuation of the left part.

- anonymous

ya i was just about to say that as well

- anonymous

i would go with A

- anonymous

Okay! http://prntscr.com/7a1uuj (Let me know when you're sick of answering my Q's) :)

- anonymous

so 24 = x/3

- anonymous

then you would do inverse operations

- anonymous

and get x = 72

- anonymous

Okay, like cross-multiplication. So it would be 24 * 3 and x * 1?

- anonymous

ya that would work too

- anonymous

72/x?

- anonymous

it would be 24 * 3 = x * 1

- anonymous

So 72 = x! Meaning answer is D?

- anonymous

you forgot the equal sign

- anonymous

yep

- anonymous

What is the pattern of this sequence? http://prntscr.com/7a1wqe

- anonymous

Do you have any ideas what the pattern might be?

- anonymous

Yes: from -2 to 3 it goes through an interval of 3. From 3 to 1 it's 2, from 1 to 4 it's 3, from 4 to 5 it's 1 and from 5 to 9 it's 4. I don't see an ongoing pattern.

- anonymous

yeah im not sure on this one sorry:(

- anonymous

No problem! :) Next one: http://prntscr.com/7a1z2r

- anonymous

I think it's A.

- anonymous

Yes it is :)

- anonymous

(5, 40) because x represents hours (independent value) it's all about interpreting the graph into a real world problem.

- anonymous

http://prntscr.com/7a1zt7 Disregard the answer I chose, it was by accident.

- anonymous

Yep and might I say u seem really smart btw you type lol

- anonymous

so your in like AP algebra 1 im guessing?

- anonymous

There isn't an AP Alg 1.. is there? I'm in honors

- anonymous

there is in some schools but I think its A but im not sure

- anonymous

I understand :)

- anonymous

Next question? or are we still on this one?

- anonymous

I believe that the answer to the one I just asked is either A or B

- anonymous

Oh it's above :)

- anonymous

Now that I look at it more I dont think its A because its saying its greater than or equal to 24,000 when it should be it's less than or equal to 24,000 right?

- anonymous

And B would eventually exceed 24,000 if im not mistaken

- anonymous

Since the value of the car is a decreasing exponential function, I agree with your points.

- anonymous

I think it is C. actually

- anonymous

But wouldn't the 'y' represent range instead of domain?

- anonymous

thats also what i was thinking as well but its the only one that makes sense i think

- anonymous

or no cause its also greater than or equal to

- anonymous

either there's a mistake with the question or we are missing something lol

- anonymous

Hmm.. you're right. Perhaps this Q doesn't have a correct answer at all. There are a couple of other Q's on this homework that are inaccurate, too.

- anonymous

oh ok then that must be it

- anonymous

http://prntscr.com/7a2622 (Again disregard the answer)

- anonymous

Ya its C

- anonymous

since its asking for the Y values (or range values)

- anonymous

This was such an easy question. I guess the concept of domain and range to me isn't very clear but I understand now. (Silly me)

- anonymous

lol

- anonymous

:P

- anonymous

http://prntscr.com/7a2796
http://prntscr.com/7a27c5
(It wouldn't fit into my screen)

- anonymous

Its A. since it said constant rate that means it has to be a straight line and also it has the ordered pair (5, 300) :)

- anonymous

Right. It's linear.

- anonymous

yep

- anonymous

Are you still willing to help? I know that your time is precious.

- anonymous

Yes I am still willing to help i just do my homework while helping others :)

- anonymous

I should try that strategy, too. Just know that even though we don't know each other, I can tell you're very kind-hearted taking the time out of your day to serve others for nothing much in return. It's truly appreciated.

- anonymous

Thank you for that and no problem :)

- anonymous

With that said.. http://prntscr.com/7a28mg

- anonymous

It is A.

- anonymous

Because the x-intercept is when y = 0, right?

- anonymous

And vice versa for the y-intercept.

- anonymous

yes thats correct

- anonymous

Or its B sorry

- anonymous

I'm pretty sure this is correct, but just in case I wanted to check it with you. And why would it be B?

- anonymous

because when you set y equal to zero then that goes away leaving you with x = 12

- anonymous

because -6(0) = 0

- anonymous

Right. Sorry I didn't see that error either.

- anonymous

http://prntscr.com/7a2afg

- anonymous

I'm not sure what zero of this function means?

- anonymous

It means when y is set to zero

- anonymous

Also known as the x-intercept

- anonymous

oh ok

- anonymous

So its D then right?

- anonymous

I got the answer by looking at the graph, but it shouldn't be that easy. The f(x) = x/2 - 4 is also throwing me off a bit

- anonymous

well the equation f(x) = 1/2x -4

- anonymous

When x = 0 the y is -4

- anonymous

and if y = 0 then x = 8

- anonymous

Horrible homework makers

- anonymous

but im pretty sure its asking for the x-intercept

- anonymous

http://prntscr.com/7a2e21 You're right

- anonymous

They're asking for the x-intercept. So it would be D.

- anonymous

Ya ok

- anonymous

http://prntscr.com/7a2ekm

- anonymous

4 would work

- anonymous

Since it's absolute value, the answer would ultimately be positive,

- anonymous

Yeah

- anonymous

but 20/3 would not since it would make a decimal

- anonymous

You're right.. again! It can't be the other options either

- anonymous

and the other numbers are way to big

- anonymous

so theres no answer..... lmao

- anonymous

Another mistake.. I'm totally going to contact my teacher about this

- anonymous

yeah you definitely should :P

- anonymous

http://prntscr.com/7a2ggl

- anonymous

I have very few left

- anonymous

I could graph this one OR calculate its vertex and ultimately maximum point.

- anonymous

Ya either one of those methods would work i would prefer calculating to find the maximum point just saying

- anonymous

Yeah, we won't always have access to graphing calculators on the exam.

- anonymous

because your not allowed or you just dont have one?

- anonymous

So vertex formula is: x = b/2a, right?

- anonymous

Or maybe I mixed it up

- anonymous

its -b isnt it?

- anonymous

Right! -b/2a = x

- anonymous

b = 300 and a = 5

- anonymous

-(300)/2(5) = -300/10

- anonymous

= -30

- anonymous

Hmm... answer choices don't match up

- anonymous

it would be 300/10 wouldnt it?

- anonymous

not negative

- anonymous

No it's negative because of the "-b"

- anonymous

for the x side

- anonymous

and its also a negative 5 so

- anonymous

it would end up being 30 = 30

- anonymous

if im not mistaken

- anonymous

Okay so it's official that I'm stupid. Thank you for pointing the negative sign of the 5. I didn't see it. So the answer is B = $30.

- anonymous

yes lol

- anonymous

and your very smart :P

- anonymous

honestly

- anonymous

http://prntscr.com/7a2ley I don't think so.. math is one of my weaker subjects haha

- anonymous

The formula for exponential increase is: f(x) = Initial Value(Rate)^x

- anonymous

ok so

- anonymous

But I also recall a (1 + r) rate to an exponential function

- anonymous

http://prntscr.com/7a2mow <--- This is just a picture. I think that I learned this back in 7th grade about interest, so I believe that my answer is correct.

- anonymous

the r is if there is an interest rate

- anonymous

or no disregard that statement lol

- anonymous

Ah, okay. So what are your thoughts?

- anonymous

I think its C and ill explain

- anonymous

Okay

- anonymous

.22 is 22% but 1.22 would be 120% and you would want 120% because it would take the initial population and add the 22% to it as just 22% would only complete half of the problem. do you undersatnd?

- anonymous

sorry if i didnt explain that well enough lol

- anonymous

Yes, I completely understand where you're coming from. But wouldn't 120% of a growth be too much of a population growth? In a real-world scale, it's not very probable, but then again, in math anything is possible in the real world lol

- anonymous

oh your completely right since A (the initial population) is already in the equation.

- anonymous

my bad :P

- anonymous

So yes its A

- anonymous

Yes! I outsmarted the wise one

- anonymous

:) Jk jk

- anonymous

haha

- anonymous

all good

- anonymous

trust me its not too hard to outsmart me at times :P

- anonymous

http://prntscr.com/7a2r8m I doubt it!

- anonymous

is D. y = 88x? or is it just y - 88x? lol

- anonymous

D. is y = 88x

- anonymous

ok

- anonymous

I think what they're doing is the simplified version of 40/880

- anonymous

So It would most likely be B

- anonymous

Yes that is correct

- anonymous

i wouldn't to try and outsmart you if math is your weaker subject :P

- anonymous

|dw:1432751159345:dw|

- anonymous

It's A

- anonymous

you mean divided by 20 right?

- anonymous

No, by 2… it's kinda how I simplify fractions in my head

- anonymous

I cancelled out the zeroes

- anonymous

oh yes i understand ok lol see i told you its not to hard to outsmart me :P

- anonymous

|dw:1432751466669:dw|

- anonymous

Same answer lol

- anonymous

for sake of me learning now lol why is the 40 the numerator and not the 880?

- anonymous

you dont have to explain if you dont want to :P

- anonymous

Oh pretend that it's not a fraction.. I just divided both numerator and denominator by 40.

- anonymous

I usually write it that way, but in my prior drawing, I wrote it by adding in small 2's so you wouldn't get confused, sorry, my mistake haha

- anonymous

no i understand that but for the equation why is it 40/880 and not 880/40

- anonymous

Oh! It was the most logical way to go in my opinion. But you bring up a valid point.. or else it would've been 22/1.

- anonymous

ya

- anonymous

im not sure which way it should be set up

- anonymous

Hours is an independent value. Time is always an independent variable. x ALWAYS represents independent values because the y is dependent. Does that make sense? Since Mrs. Marez worked for 40 hours, then 40 would represent x. Usually it's x/y, because it represents the relationship between both x and y. However, the rate of change is: y2 - y1 / x2 - x1

- anonymous

In other words, it's y/x… so now I'm truly split between this

- anonymous

I believe that the relationship refers to slope.

- anonymous

ok so lets just say the answer is y = 22x. it says last week she earned $880 and its asking for her weekly earnings. so if we multiplied 22 by 40 that would equal her weekly income of $880. now if we multiplied 1/22 by 40 that would be 1.8

- anonymous

So im pretty sure it is B now lol

- anonymous

does that make sense?

- anonymous

Definitely. (See, you outsmarted me again)

- anonymous

http://prntscr.com/7a2wi6

- anonymous

hahaha that seemed harder than it should have been

- anonymous

Another sequence problem ^^

- anonymous

right lol

- anonymous

i would guess B

- anonymous

I would guess either C or D because B would be the 6th value.. not the 8th

- anonymous

but im not exactly sure what the pattern is

- anonymous

so u think the fractions are multiplying by 2?

- anonymous

|dw:1432752458487:dw|

- anonymous

The last three have a pattern and the first two have a separate pattern

- anonymous

i saw that as well

- anonymous

so D then correct?

- anonymous

I think D is the answer

- anonymous

ya and the numerator is multiplying by 2

- anonymous

Brb for 5 mins

- anonymous

ok

- anonymous

just tag me in the chat when you're back :)

- anonymous

I sincerely apologize @Chumpian my internet connection was reset

- anonymous

I have 5 or 6 Q's left if you're up for it

- anonymous

im up for it :)

- anonymous

Thank you! http://prntscr.com/7a3hj7

- anonymous

Please disregard the answer I chose.. it's a random guess as I didn't look at the Q

- anonymous

It's C right?

- anonymous

Ya it's C

- anonymous

Let me check

- anonymous

Yup! It's C.

- anonymous

http://prntscr.com/7a3kpt I put the #'s in order

- anonymous

School A: 1300, 1350, 1350, 1370, 1400
School B: 1300, 1350, 1375, 1400, 1410

- anonymous

C is correct for the first part

- anonymous

I think #45 and #46 are separate Q's and aren't two part Q's

- anonymous

ok i thought so as well

- anonymous

Is #46 D?

- anonymous

I'm not sure

- anonymous

Wait no it says least likely to be a normal distribution, so it's either A or B

- anonymous

It would be B then right?

- anonymous

How old are you just curious?

- anonymous

Not sure because it can't be a normal distribution if they're asking for 14-year old girls outside New York.. meaning everywhere around the world.

- anonymous

I'm 12 but I take advanced class and skipped two grades

- anonymous

classes*

- anonymous

:0

- anonymous

im embarrassed now lol

- anonymous

Why? No need to be but how old are you?

- anonymous

I'm 16

- anonymous

Most of my friends are 15+ haha

- anonymous

and your just as smart if not smarter than i am lol

- anonymous

I don't think so… you have more experiences being older than I am. Although you may be in Alg 2 (assuming you're in 10th/11th grade) you still take other courses that are totally not equivalent to an 8th graders'.

- anonymous

true true but back to the Q im not sure what it is :(

- anonymous

It's fine! I put in A. http://prntscr.com/7a3qw7 Last question and you're free of me! :)

- anonymous

It would be D :)

- anonymous

Yup! Just checked. Thank you so, so much.

- anonymous

np ;)

- anonymous

Just tag or message me if im on if you want any help

- anonymous

I'll let you know what I get in about 10-15 mins (only if you want to) as I do the other Q's :)
Have a great rest of the day!

- anonymous

ok you too :)

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