anonymous
  • anonymous
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.
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus. Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.
jamiebookeater
  • jamiebookeater
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
anonymous
  • anonymous
i will try my best :)
anonymous
  • anonymous
Thank you! Give me a few seconds.
anonymous
  • anonymous
ok

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anonymous
  • anonymous
1st Q: http://prntscr.com/7a1nki
anonymous
  • anonymous
If you don't know it, it's fine, we can move on if you'd like :)
anonymous
  • anonymous
I'm in algebra 2 as of now and I'm not sure of the answer lol
anonymous
  • anonymous
Okay! No problem. (I'm in Algebra 1) Let me get out the next Q.
anonymous
  • anonymous
k
anonymous
  • anonymous
http://prntscr.com/7a1pxw
anonymous
  • anonymous
It would be A. you want an explanation?
anonymous
  • anonymous
Yes, please :)
anonymous
  • anonymous
ok so the shaded part of the graph would all be correct answers
anonymous
  • anonymous
and A is the only ordered pairs within the shaded part
anonymous
  • anonymous
Oh okay, so by trial and error, one can get the correct answer easily. Thank you!
anonymous
  • anonymous
np
anonymous
  • anonymous
Q.3: http://prntscr.com/7a1r4w Are they asking for the rate of change?
anonymous
  • anonymous
I don't think so
anonymous
  • anonymous
im pretty sure its C.
anonymous
  • anonymous
Why is that?
anonymous
  • anonymous
because when i plugged in the numbers into the equation they equaled eachother
anonymous
  • anonymous
5 is plugged into h(5) =
anonymous
  • 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
  • anonymous
and 0 is plugged into x
anonymous
  • anonymous
yep :)
anonymous
  • anonymous
http://prntscr.com/7a1ssa I was thinking it's either the peak or the left part
anonymous
  • anonymous
(Those are the only parts that make the function non-linear)
anonymous
  • anonymous
So it's either A or B
anonymous
  • anonymous
But then C also describes the peak
anonymous
  • anonymous
huh
anonymous
  • anonymous
or no sorry not C
anonymous
  • anonymous
Precisely... but they're asking for an interval, so it can't be C
anonymous
  • anonymous
Ya its a or b im not sure which one
anonymous
  • 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
  • anonymous
ya i was just about to say that as well
anonymous
  • anonymous
i would go with A
anonymous
  • anonymous
Okay! http://prntscr.com/7a1uuj (Let me know when you're sick of answering my Q's) :)
anonymous
  • anonymous
so 24 = x/3
anonymous
  • anonymous
then you would do inverse operations
anonymous
  • anonymous
and get x = 72
anonymous
  • anonymous
Okay, like cross-multiplication. So it would be 24 * 3 and x * 1?
anonymous
  • anonymous
ya that would work too
anonymous
  • anonymous
72/x?
anonymous
  • anonymous
it would be 24 * 3 = x * 1
anonymous
  • anonymous
So 72 = x! Meaning answer is D?
anonymous
  • anonymous
you forgot the equal sign
anonymous
  • anonymous
yep
anonymous
  • anonymous
What is the pattern of this sequence? http://prntscr.com/7a1wqe
anonymous
  • anonymous
Do you have any ideas what the pattern might be?
anonymous
  • 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
  • anonymous
yeah im not sure on this one sorry:(
anonymous
  • anonymous
No problem! :) Next one: http://prntscr.com/7a1z2r
anonymous
  • anonymous
I think it's A.
anonymous
  • anonymous
Yes it is :)
anonymous
  • anonymous
(5, 40) because x represents hours (independent value) it's all about interpreting the graph into a real world problem.
anonymous
  • anonymous
http://prntscr.com/7a1zt7 Disregard the answer I chose, it was by accident.
anonymous
  • anonymous
Yep and might I say u seem really smart btw you type lol
anonymous
  • anonymous
so your in like AP algebra 1 im guessing?
anonymous
  • anonymous
There isn't an AP Alg 1.. is there? I'm in honors
anonymous
  • anonymous
there is in some schools but I think its A but im not sure
anonymous
  • anonymous
I understand :)
anonymous
  • anonymous
Next question? or are we still on this one?
anonymous
  • anonymous
I believe that the answer to the one I just asked is either A or B
anonymous
  • anonymous
Oh it's above :)
anonymous
  • 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
  • anonymous
And B would eventually exceed 24,000 if im not mistaken
anonymous
  • anonymous
Since the value of the car is a decreasing exponential function, I agree with your points.
anonymous
  • anonymous
I think it is C. actually
anonymous
  • anonymous
But wouldn't the 'y' represent range instead of domain?
anonymous
  • anonymous
thats also what i was thinking as well but its the only one that makes sense i think
anonymous
  • anonymous
or no cause its also greater than or equal to
anonymous
  • anonymous
either there's a mistake with the question or we are missing something lol
anonymous
  • 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
  • anonymous
oh ok then that must be it
anonymous
  • anonymous
http://prntscr.com/7a2622 (Again disregard the answer)
anonymous
  • anonymous
Ya its C
anonymous
  • anonymous
since its asking for the Y values (or range values)
anonymous
  • 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
  • anonymous
lol
anonymous
  • anonymous
:P
anonymous
  • anonymous
http://prntscr.com/7a2796 http://prntscr.com/7a27c5 (It wouldn't fit into my screen)
anonymous
  • 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
  • anonymous
Right. It's linear.
anonymous
  • anonymous
yep
anonymous
  • anonymous
Are you still willing to help? I know that your time is precious.
anonymous
  • anonymous
Yes I am still willing to help i just do my homework while helping others :)
anonymous
  • 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
  • anonymous
Thank you for that and no problem :)
anonymous
  • anonymous
With that said.. http://prntscr.com/7a28mg
anonymous
  • anonymous
It is A.
anonymous
  • anonymous
Because the x-intercept is when y = 0, right?
anonymous
  • anonymous
And vice versa for the y-intercept.
anonymous
  • anonymous
yes thats correct
anonymous
  • anonymous
Or its B sorry
anonymous
  • 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
  • anonymous
because when you set y equal to zero then that goes away leaving you with x = 12
anonymous
  • anonymous
because -6(0) = 0
anonymous
  • anonymous
Right. Sorry I didn't see that error either.
anonymous
  • anonymous
http://prntscr.com/7a2afg
anonymous
  • anonymous
I'm not sure what zero of this function means?
anonymous
  • anonymous
It means when y is set to zero
anonymous
  • anonymous
Also known as the x-intercept
anonymous
  • anonymous
oh ok
anonymous
  • anonymous
So its D then right?
anonymous
  • 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
  • anonymous
well the equation f(x) = 1/2x -4
anonymous
  • anonymous
When x = 0 the y is -4
anonymous
  • anonymous
and if y = 0 then x = 8
anonymous
  • anonymous
Horrible homework makers
anonymous
  • anonymous
but im pretty sure its asking for the x-intercept
anonymous
  • anonymous
http://prntscr.com/7a2e21 You're right
anonymous
  • anonymous
They're asking for the x-intercept. So it would be D.
anonymous
  • anonymous
Ya ok
anonymous
  • anonymous
http://prntscr.com/7a2ekm
anonymous
  • anonymous
4 would work
anonymous
  • anonymous
Since it's absolute value, the answer would ultimately be positive,
anonymous
  • anonymous
Yeah
anonymous
  • anonymous
but 20/3 would not since it would make a decimal
anonymous
  • anonymous
You're right.. again! It can't be the other options either
anonymous
  • anonymous
and the other numbers are way to big
anonymous
  • anonymous
so theres no answer..... lmao
anonymous
  • anonymous
Another mistake.. I'm totally going to contact my teacher about this
anonymous
  • anonymous
yeah you definitely should :P
anonymous
  • anonymous
http://prntscr.com/7a2ggl
anonymous
  • anonymous
I have very few left
anonymous
  • anonymous
I could graph this one OR calculate its vertex and ultimately maximum point.
anonymous
  • anonymous
Ya either one of those methods would work i would prefer calculating to find the maximum point just saying
anonymous
  • anonymous
Yeah, we won't always have access to graphing calculators on the exam.
anonymous
  • anonymous
because your not allowed or you just dont have one?
anonymous
  • anonymous
So vertex formula is: x = b/2a, right?
anonymous
  • anonymous
Or maybe I mixed it up
anonymous
  • anonymous
its -b isnt it?
anonymous
  • anonymous
Right! -b/2a = x
anonymous
  • anonymous
b = 300 and a = 5
anonymous
  • anonymous
-(300)/2(5) = -300/10
anonymous
  • anonymous
= -30
anonymous
  • anonymous
Hmm... answer choices don't match up
anonymous
  • anonymous
it would be 300/10 wouldnt it?
anonymous
  • anonymous
not negative
anonymous
  • anonymous
No it's negative because of the "-b"
anonymous
  • anonymous
for the x side
anonymous
  • anonymous
and its also a negative 5 so
anonymous
  • anonymous
it would end up being 30 = 30
anonymous
  • anonymous
if im not mistaken
anonymous
  • 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
  • anonymous
yes lol
anonymous
  • anonymous
and your very smart :P
anonymous
  • anonymous
honestly
anonymous
  • anonymous
http://prntscr.com/7a2ley I don't think so.. math is one of my weaker subjects haha
anonymous
  • anonymous
The formula for exponential increase is: f(x) = Initial Value(Rate)^x
anonymous
  • anonymous
ok so
anonymous
  • anonymous
But I also recall a (1 + r) rate to an exponential function
anonymous
  • 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
  • anonymous
the r is if there is an interest rate
anonymous
  • anonymous
or no disregard that statement lol
anonymous
  • anonymous
Ah, okay. So what are your thoughts?
anonymous
  • anonymous
I think its C and ill explain
anonymous
  • anonymous
Okay
anonymous
  • 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
  • anonymous
sorry if i didnt explain that well enough lol
anonymous
  • 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
  • anonymous
oh your completely right since A (the initial population) is already in the equation.
anonymous
  • anonymous
my bad :P
anonymous
  • anonymous
So yes its A
anonymous
  • anonymous
Yes! I outsmarted the wise one
anonymous
  • anonymous
:) Jk jk
anonymous
  • anonymous
haha
anonymous
  • anonymous
all good
anonymous
  • anonymous
trust me its not too hard to outsmart me at times :P
anonymous
  • anonymous
http://prntscr.com/7a2r8m I doubt it!
anonymous
  • anonymous
is D. y = 88x? or is it just y - 88x? lol
anonymous
  • anonymous
D. is y = 88x
anonymous
  • anonymous
ok
anonymous
  • anonymous
I think what they're doing is the simplified version of 40/880
anonymous
  • anonymous
So It would most likely be B
anonymous
  • anonymous
Yes that is correct
anonymous
  • anonymous
i wouldn't to try and outsmart you if math is your weaker subject :P
anonymous
  • anonymous
|dw:1432751159345:dw|
anonymous
  • anonymous
It's A
anonymous
  • anonymous
you mean divided by 20 right?
anonymous
  • anonymous
No, by 2… it's kinda how I simplify fractions in my head
anonymous
  • anonymous
I cancelled out the zeroes
anonymous
  • anonymous
oh yes i understand ok lol see i told you its not to hard to outsmart me :P
anonymous
  • anonymous
|dw:1432751466669:dw|
anonymous
  • anonymous
Same answer lol
anonymous
  • anonymous
for sake of me learning now lol why is the 40 the numerator and not the 880?
anonymous
  • anonymous
you dont have to explain if you dont want to :P
anonymous
  • anonymous
Oh pretend that it's not a fraction.. I just divided both numerator and denominator by 40.
anonymous
  • 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
  • anonymous
no i understand that but for the equation why is it 40/880 and not 880/40
anonymous
  • 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
  • anonymous
ya
anonymous
  • anonymous
im not sure which way it should be set up
anonymous
  • 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
  • anonymous
In other words, it's y/x… so now I'm truly split between this
anonymous
  • anonymous
I believe that the relationship refers to slope.
anonymous
  • 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
  • anonymous
So im pretty sure it is B now lol
anonymous
  • anonymous
does that make sense?
anonymous
  • anonymous
Definitely. (See, you outsmarted me again)
anonymous
  • anonymous
http://prntscr.com/7a2wi6
anonymous
  • anonymous
hahaha that seemed harder than it should have been
anonymous
  • anonymous
Another sequence problem ^^
anonymous
  • anonymous
right lol
anonymous
  • anonymous
i would guess B
anonymous
  • anonymous
I would guess either C or D because B would be the 6th value.. not the 8th
anonymous
  • anonymous
but im not exactly sure what the pattern is
anonymous
  • anonymous
so u think the fractions are multiplying by 2?
anonymous
  • anonymous
|dw:1432752458487:dw|
anonymous
  • anonymous
The last three have a pattern and the first two have a separate pattern
anonymous
  • anonymous
i saw that as well
anonymous
  • anonymous
so D then correct?
anonymous
  • anonymous
I think D is the answer
anonymous
  • anonymous
ya and the numerator is multiplying by 2
anonymous
  • anonymous
Brb for 5 mins
anonymous
  • anonymous
ok
anonymous
  • anonymous
just tag me in the chat when you're back :)
anonymous
  • anonymous
I sincerely apologize @Chumpian my internet connection was reset
anonymous
  • anonymous
I have 5 or 6 Q's left if you're up for it
anonymous
  • anonymous
im up for it :)
anonymous
  • anonymous
Thank you! http://prntscr.com/7a3hj7
anonymous
  • anonymous
Please disregard the answer I chose.. it's a random guess as I didn't look at the Q
anonymous
  • anonymous
It's C right?
anonymous
  • anonymous
Ya it's C
anonymous
  • anonymous
Let me check
anonymous
  • anonymous
Yup! It's C.
anonymous
  • anonymous
http://prntscr.com/7a3kpt I put the #'s in order
anonymous
  • anonymous
School A: 1300, 1350, 1350, 1370, 1400 School B: 1300, 1350, 1375, 1400, 1410
anonymous
  • anonymous
C is correct for the first part
anonymous
  • anonymous
I think #45 and #46 are separate Q's and aren't two part Q's
anonymous
  • anonymous
ok i thought so as well
anonymous
  • anonymous
Is #46 D?
anonymous
  • anonymous
I'm not sure
anonymous
  • anonymous
Wait no it says least likely to be a normal distribution, so it's either A or B
anonymous
  • anonymous
It would be B then right?
anonymous
  • anonymous
How old are you just curious?
anonymous
  • 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
  • anonymous
I'm 12 but I take advanced class and skipped two grades
anonymous
  • anonymous
classes*
anonymous
  • anonymous
:0
anonymous
  • anonymous
im embarrassed now lol
anonymous
  • anonymous
Why? No need to be but how old are you?
anonymous
  • anonymous
I'm 16
anonymous
  • anonymous
Most of my friends are 15+ haha
anonymous
  • anonymous
and your just as smart if not smarter than i am lol
anonymous
  • 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
  • anonymous
true true but back to the Q im not sure what it is :(
anonymous
  • anonymous
It's fine! I put in A. http://prntscr.com/7a3qw7 Last question and you're free of me! :)
anonymous
  • anonymous
It would be D :)
anonymous
  • anonymous
Yup! Just checked. Thank you so, so much.
anonymous
  • anonymous
np ;)
anonymous
  • anonymous
Just tag or message me if im on if you want any help
anonymous
  • 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
  • anonymous
ok you too :)

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