Math Is Fun Forum

Awesome! Thank you very much for the help! It's definitely much easier for me now.

For 16, I got the answer 'C' [(2r + 3)(3r + 2) ].

For 18:
18. 5n^2 + 19n - 4   
A (n + 4)(5n - 1)
B (5n - 4)(n + 1)
C (5n - 4)(n - 1)
D (n - 4)(5n + 1)   
E (n - 2)(5n + 2)
F cannot be factored

I choose 'F' because there is nothing I can think of that will add up to 4 when times together and add up to 19 when added together.

19:
19. m^2 + (5/12)m - (1/6)    
A (m - 6)(m + 1)
B (m - 2/3)(m - 1/4)
C cannot be factored
D (m - 1/4)(m + 2/3)
E (m/12 + 2)(m/12 - 3)
F (m - 1/4)(m - 1/3)

I was having trouble trying to find the factors for these, I'm not too great with fractions.

20:
20. a^2 + 4a + 21
A (a + 7)(a - 3)
B a(a + 4) + 21
C (a + 21)(a - 1)
D (a + 3)(a - 7)
E (a + 7)(a + 3)
F cannot be factored   

Answer is 'F.'

Hi bobbym and anonimnystefy , thank you very much!

And Bob, from what I have heard, AFTER I am done with my high schooling program, I am going to have to take a SAT test which basically is there to help any college I am trying to get into understand what points I may be weak in (points as in subjects such as math, English, history, etc.). Now I was also recommended by the school to take certain courses from my local community college which would add to my credits and will allow me to get into a better college (not exactly sure how it may be in the UK, but in the US you need 22 credits to get into a college, each course will give you different amounts of credits, any where from 0.5 - 1.00).

So my plan is to get as many credits I can which could help me get into a good college. I have had two colleges in mind that are not too far from where I am and I know some people who have gone there, so from what they have said these colleges seem to be pretty good.

As for contacting K12, I have already done so some few weeks ago and am waiting for their reply to see if I qualify for their schooling program.

Once again, I just really want to thank you all for your help! It would have been super hard for me to finish my Algebra and Geometry but, with you guys, it's been a smooth road!

Well I might be enrolling into K12 (http://www.k12.com/). I have heard quite a few great things about it and I know a few friends who have been doing K12. It seems pretty good since I will be able to actually talk to my teachers if I need help or have any questions.

I sent in the revision and 'D' was correct. Got a 10.000 on the lesson and now my Geometry course is finished. I would love to thank you, Bobbym and anonimnystefy for your help. It was and still is highly appreciated!

I decided to go with your second opinion. I used 'B':
144 - 18 (sqrt 3)
144 - 31.1769
112.8230

That's the closest I got. Am I doing the equation correctly?

#17 - so it would be 3 x volume DEVIDED by what pie x height equals?

#18 - So it would be 12 x .42 = 5.04
Assuming that A means area, how would I use the area to get the height?

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#20 - Area of the entire square is 144. The inner triangle I used this equation I found online. Tell me if it's right or wrong (or maybe if I am doing it wrong):
A = 1/2 x (a) x (b) x sin(C)
A = 1/2 x (12) x (6) x sin(60)
A = 1/2 x (72) x sin(60)
A = 36 x sin(60)
A = 36 x .86
A = 30.96

Little confusing, but I'm understanding it more. Thanks!

Here are the final 5 Geometry problems:
[img]ttp://imageshack.us/a/img845/3231/ht1p.png[/img]

#16 - 'A'

#17 - They want me to round it up to the nearest whole number. The radius is 6.5. Am I supposed to go upward to get answer 'C' - 8 OR downwards to get answer 'B' - 5?

#18 - **need help how to solve

#19 - 'C'

#20 - **not entirely sure how to solve this one.

Not entirely. Could you explain?

So measure B is greater than measure A.

#3 - I see now it makes MUCH more sense. AC and CE make up the entire line. D is the midpoint of CE. So if DE = 5, then CE = 10. And since AC = CE, AC also equals 10. We want to find out length of AB. So what we do is AC - BC which is 10 - 2 = 8!

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#8 -
I go an answer of 6.32. Is that correct so far?

#10 -  16 x 14/8 = 28, which is 'A'

#4 - so answer is 'C'! Now if the angles were on the opposite side, would it be considered complementary?

As we go through that, here are the next 5:

#6 - answer 'C'

#7 - answer 'C' (lots of answers being 'C' so far!)

#8 - i go with 'A'

#9 - 'B'

#10 - **not sure how I would get the measusements for that. i know that the top triangle has sides of 16 - 16 - 8. The shape on the bottom has a base of 14 and if you would say a "top" of 8.

#1 - how would I do this? I thought complimentary angles added up to 90 degrees and so that is why I chose 'B', 55 degrees.

#3 - so C is the answer, but in the future if I ever come across anything like this, how would I do the work to get my answer?

#4 - would prefer help understanding how to solve this.