# Posts by MathMat

Total # Posts: 50

**math**

Remember to use the Please Excuse My Dear Aunt Sally acronym: 5x5+5x5+5-5x5 25+25+5-25 the negative 25 cancels the other 25 so you are left with: 25+5 which equals 30

*May 11, 2014*

**Algebra/Language Arts**

I have a 15 page paper due tomorrow. I finished the paper, and edited it and all, that's not my problem. My cover page is a work of art that I designed and I wanted to put a note on how it relates to my essay. How would I go about doing this? Do I add a page at the back ...

*March 13, 2014*

**Algebra**

1 and 2 are correct, as far as I can figure out. You would leave number 1 as 2.5, if not a more complex decimal. As a mathmatician, you will always show the decimals to several points out. Scientists don't like this saying that extra decimals just create confusions. If you...

*March 13, 2014*

**Algebra 2**

Oh! I get that now! Thank u soo much!

*August 14, 2013*

**Algebra 2**

Ya, but one is x^2=14x+5

*August 14, 2013*

**Algebra 2**

Ya I figured those out, but I put down your equation into my notes cause it made more sense than what I did. How do I factor with -x?

*August 14, 2013*

**Algebra 2**

2x(3x+4)-3(3x+4) -2x(x+7)-(x+7)

*August 14, 2013*

**Algebra 2**

Wait I got it! (3x+5)(4x-1). I have a few more...

*August 14, 2013*

**Algebra 2**

I got the third one (3x-7)(3x+2) but I can't figure out the 4th one. How do I do this that one? I know it can only be 5 and 1, but I tried all of the x values and it doesn't work! I tried 6 and 2, 12 and 1, and 4 and 3

*August 14, 2013*

**Algebra 2**

Factor each quadratic equation: 8x^2+10x-3 25x^2+10x-3 9x^2-15x-14 12x^2+17x-5 I don't get how to even start these! Help!

*August 14, 2013*

**Geometry**

Graph it out and use the Pythagorean theorem to find 2 sides. Multiply those together.

*August 14, 2013*

**Math**

I am not sure what the formula is, but I can tell you that 1/4 multiplied by 80 is not 60. It would be 20. 60 is 3/4 of 80.

*May 6, 2013*

**Writing**

Ok thanks!

*May 5, 2013*

**Writing**

No. I am supposed to use a quote as my title.

*May 5, 2013*

**Writing**

If I use a quote as a title, do I capitalize every first letter in the quote? Example: Should my title be... "The only place success comes before work is in the dictionary" or "The Only Place Success Comes Before Work Is In The Dictionary" please answer soon!

*May 5, 2013*

**algebra**

You cannot simplify this equation unless it is equal to something

*March 31, 2013*

**math**

Do 85 dived by 75 to get your answer in percentage

*March 31, 2013*

**math**

Try pluging in x coordinates between -5 and 5 to find your vertex

*March 31, 2013*

**algebra**

X^2+20 you add the units

*March 31, 2013*

**math**

(X+8)/6

*March 21, 2013*

**math**

So -|-5-7| =-|-12| =(-1)(12) =-12

*March 21, 2013*

**math**

You can't subtract a (

*March 21, 2013*

**math**

What is do the numbers around the equation mean? Are they part of it?

*March 21, 2013*

**dhs**

Mrs sue put the equation for a interest that was put to the initial price and collected annually, this is not what the question is asking for.

*March 21, 2013*

**dhs**

8,500$ car, wow So if the interest rate is 4.6% for 5 years, she has to pay that percentage of the total cost each year. There is an equation for this, but to make it simpler ill tell you it this way: 8500 Initial cost 8500*1.046 cost after 1 year =8891 8891*1.046 Cost after 2...

*March 21, 2013*

**inequality/math**

3x-8>5 So 3x>5+8 3x>13 x<13/3 x<4.3333333333(forever)

*March 21, 2013*

**business math**

So first 50000000 times .8 which is the opposite of 20% which gives you your first answer of 40 million left over. The equation for the interest after this is 40000000(0.7^30)

*March 21, 2013*

**Spanish: check answers**

You are correct as far as I see, and the fast food question, you are correct, just usually the menus are a lot different

*March 21, 2013*

**Spanish**

México, que era precioso. Siguiente Italia parada.

*March 19, 2013*

**geometry**

Ok, so I have this worksheet due, and it's for a lot of points, so can you check over my answers please? Can you leave your email so I could forward the scan to you? The worksheet has a lot of labeled shapes, so it's hard to describe in text. These are the answers that...

*March 19, 2013*

**math**

144

*March 19, 2013*

**Physics**

The vibration increased and the sound relayed is constant

*March 19, 2013*

**math 140**

Jack-5=John See if that gets you anywhere, you need to do substitution.

*March 18, 2013*

**math**

3592736 is wrong. 461592*308=142170336. Then the final answer should be 156118096

*January 29, 2013*

**math**

Um, those fractions are in their simplest forms.

*January 18, 2013*

**Math**

So 2/5 of the stamps are left with 12 stamps. So there for 1/5 of the stamps is 6 stamps. Now just multiply 6*3 for the amount that he sent. =18

*January 17, 2013*

**algebra**

C(x)=70x-1000

*January 17, 2013*

**7th Grade Math stuffs**

Yes, as long as the equation is not rationalized.

*January 17, 2013*

**7th Grade Math stuffs**

Independent is by itself. Dependent needs a problem before it.

*January 17, 2013*

**Computer (Hardware Support)**

Um computers transformers and anything with a USB port.

*January 17, 2013*

**Geometry**

Never mind everyone. I graphed it and showed him I was correct.

*January 17, 2013*

**Geometry**

Just really quick, my friend and I disagree on this problem. I got 1997 and he got 721.033 4. A surveryor is standing on horizontal ground level with the base of a skyscraper. The angle formed by the line segment from his position to the top of the skyscraper is 31 degrees. ...

*January 17, 2013*

**Math**

Plug the equation in in separate parts. Otherwise most calculators would change the steps up. Try this to start (8/(2^3))-2+(4.1*2). Remember the steps in solving an equation (power, parentheses, multiplication, division, addition, subtraction. In that order).

*January 17, 2013*

**math help me plss**

1c 2a 3(you need a percentage to start with) Converting percentage to decimal is easy. First get rid of the percentage sign by crossing it off. Then move the decimal 2 places forward. Here I did an example following these steps below. 27% 27 2.7 0.27 Just that easy! Really it...

*January 17, 2013*

**science**

Eric, this really depends on if the block is porus. Could you please respond back with more details? I am willing to help. Also, what is the surface tension of the water?

*January 17, 2013*

**multiplying and significant figs**

Hmm, does your teacher want a specific decimal place? If so, you just tell the numbers as they calculate out to that decimal place (ie 0.284926493 if asked for ten thousandth place would just be 0.2849).

*January 17, 2013*

**multiplying and significant figs**

That is 2808, but let me show you how to easily calculate this out. For an example, 1507*1.93. If you plug this into a calculator you get the answer of 2908.51. Significant figures are just simplified numbers that engineers use. Since there is no machine that can go to such ...

*January 17, 2013*

**multiplying and significant figs**

304.8 the sig fig does not go down on this problem.

*January 17, 2013*

**Math**

For the first part, it is just asking for a life cycle in math terms. A plant will grow a lot more in its first week than in its second third and so on. It's decay is 2x faster than its growth. For the second part, just ask your fellow students.

*January 17, 2013*

**Geometry**

This problem has some missing information. You know that the pole is 16 feet high, and the wires connect 12 feet up (16-4=12). If you found the length from the bottom of the pole to the grounding point, you could use the equation 12^2+X^2=L^2 with x standing for the length of ...

*March 5, 2012*

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