Sunday

April 20, 2014

April 20, 2014

**Branches of Math**

**Recent Math Questions**

Post a New Question | Current Questions

**math help**

Wolfram Alpha ^_^
*Thursday, March 27, 2014 at 9:17pm*

**math help**

[ (a-b) - (c-d) ] - [ (a-b) + (c-d) ] [ a - b - c + d ] [ a - b + c - d ]
*Thursday, March 27, 2014 at 9:17pm*

**Math**

This doesn't make sense. Please proofread and repost.
*Thursday, March 27, 2014 at 9:15pm*

**math help!**

how did you get that??
*Thursday, March 27, 2014 at 9:14pm*

**Math**

36 / 2.25 = 16 bows 3*2.25 = 6.75 feet will not be used
*Thursday, March 27, 2014 at 9:14pm*

**Math**

cosine law .... 5.4^2 = 6.2^2 + 3.6^2 - 2(6.2)(3.6)cosR cosR = 22.24/44.64 = .4982.. R = 60.1°
*Thursday, March 27, 2014 at 9:12pm*

**Math**

If an orange is twice as many as a pear. How many pears are there?
*Thursday, March 27, 2014 at 9:12pm*

**math help**

(a - b - c + d)(a- b + c - D)
*Thursday, March 27, 2014 at 9:11pm*

**Math**

direct application of the sine law: x/sin41 = 96/sin71 x = 96sin41/sin71 = ....
*Thursday, March 27, 2014 at 9:06pm*

**math help**

factor: (a-b)^2 - (c-d)^2
*Thursday, March 27, 2014 at 9:06pm*

**Math**

Fay is making 13 bows to sell. She has 36 feet of ribbon. If each bow requires 2 1/4 feet of ribbon, how much ribbon will not b used
*Thursday, March 27, 2014 at 9:06pm*

**math**

Multiply: (3/4) * 20 = 60/4 = 15
*Thursday, March 27, 2014 at 8:44pm*

**math**

jared bought a package of pens containing 20 pens. If 3/4 of the pens had black ink, how do you determine the number of pens with black ink?
*Thursday, March 27, 2014 at 8:41pm*

**math help ASAP!!**

m(2m+3n)(m-5n)
*Thursday, March 27, 2014 at 8:36pm*

**math**

450 divided by 14 is 32.14285714285714 or 32 when rounded. It can also be rounded to any other place, depending on what they want.
*Thursday, March 27, 2014 at 8:36pm*

**math**

thankyou!
*Thursday, March 27, 2014 at 8:31pm*

**Math**

in triangle PQR, PQ=5.4, QR=3.6, and PR=6.2. to the nearest tenth, what is m<R?
*Thursday, March 27, 2014 at 8:31pm*

**math**

450 divide 14?
*Thursday, March 27, 2014 at 8:31pm*

**math**

ohh ok thanks! :)
*Thursday, March 27, 2014 at 8:31pm*

**math help ASAP!!**

factor: 2m^3 - 7m^2n - 15mn^2
*Thursday, March 27, 2014 at 8:29pm*

**Math**

In triangle ABC, m<A=71, m<C=41, and BC=96. To the nearest tenth, what is AB?
*Thursday, March 27, 2014 at 8:28pm*

**math**

Yes !!! You got it. even the -1 * -1 = + 1 part
*Thursday, March 27, 2014 at 8:28pm*

**math**

You're welcome.
*Thursday, March 27, 2014 at 8:27pm*

**math**

Multiply: 0.04 * 350 = ?
*Thursday, March 27, 2014 at 8:26pm*

**Math**

7 14 21 28 35 42 49 56 63 70
*Thursday, March 27, 2014 at 8:25pm*

**math**

P = (Po*r*t)/(1-(1+r)^-t) Po = Initial principal = $199,000 r = (7.01%/12)/100% = 0.00584 = Monthly % rate expressed as a decimal. t = 25yrs * 12mo/yr. = 300 Months. Plug the above values into the given Eq. and get: P = $422,328.10 Int.(Tot.) = P-Po = $223,328.10 Monthly ...
*Thursday, March 27, 2014 at 8:23pm*

**math**

What is 4% of 350??
*Thursday, March 27, 2014 at 8:22pm*

**Math**

Write the multiples of 7 through 70:
*Thursday, March 27, 2014 at 8:22pm*

**math**

sorry about the caps, was doing tax returns with caps lock on
*Thursday, March 27, 2014 at 8:21pm*

**math**

yOU HAVE [X - [Y-Z) ] THAT IS [ X - Y - NEGATIVE Z ] - A NEGATIVE IS POSITIVE [ X -Y PLUS Z ]
*Thursday, March 27, 2014 at 8:20pm*

**math**

I got 14%. Is this correct, Ms. Sue?
*Thursday, March 27, 2014 at 8:14pm*

**math check my answer!**

no the answer is -5(2x-y)(2x+y) ^is that right??
*Thursday, March 27, 2014 at 8:10pm*

**math**

is it -20x^2 + 5y^2 = -5(4x^2-y^2)
*Thursday, March 27, 2014 at 8:08pm*

**math**

factor: -20x^2 + 5y^2
*Thursday, March 27, 2014 at 8:07pm*

**5th Grade Math**

No. Since he played half as many games, I'd predict he'd win half as many as he did for the first round.
*Thursday, March 27, 2014 at 8:05pm*

**math**

Sorry, Ms. Sue, I did not read it carefully.
*Thursday, March 27, 2014 at 8:04pm*

**math**

Thank you so much ! :)
*Thursday, March 27, 2014 at 8:03pm*

**math**

Go with Ms. Sue, I was typing, and didn't see hers. Just ignore my answer.
*Thursday, March 27, 2014 at 8:03pm*

**math**

No, Brady. Your answer is wrong.
*Thursday, March 27, 2014 at 8:03pm*

**math**

25 times 0.92 is 23 So, 0.92 is the answer.
*Thursday, March 27, 2014 at 8:01pm*

**math**

Do this problem the same way I showed you for the last problem.
*Thursday, March 27, 2014 at 8:01pm*

**math**

23/25 = 0.92 = 92%
*Thursday, March 27, 2014 at 7:59pm*

**math**

They could be either 5 by 5 or 15 by 15.
*Thursday, March 27, 2014 at 7:58pm*

**math**

What percent of 600 is 84?
*Thursday, March 27, 2014 at 7:58pm*

** math**

What percent of 25 is 23?
*Thursday, March 27, 2014 at 7:57pm*

**5th Grade Math**

8 games
*Thursday, March 27, 2014 at 7:55pm*

**math**

I have a flat piece of plywood that measures 45 inches in width and 75 inches in length. I want to cut the board into identical square pieces with the integer side lengths and use the entire piece of wood. What are the dimensions (width & length) of each identical piece? ...
*Thursday, March 27, 2014 at 7:54pm*

**5th Grade Math**

Since he won 12 out of 20 in his first games, how many games do you think he'll win in the next 10 games?
*Thursday, March 27, 2014 at 7:43pm*

**5th Grade Math**

Keith played some games of chess at a tournament. He recorded the results of the games on the table shown. Game Results: Number of Games TIES 4 WINS 12 Losses 4 If Keith plays 10 more games, how many of the 10 games is he likely to win? A. 6 games B. 8 games C. 4 games D. 2 games
*Thursday, March 27, 2014 at 7:36pm*

**5th grade math**

20/100 = 1/5
*Thursday, March 27, 2014 at 7:36pm*

**5th grade math **

Samara keeps her collection of hair bows in a box. She has 20 white bows, 20 red bows, 15 yellow bows, 25 green bows, and 20 pink bows. If she pulls out 1 bow at random, what is the probability the bow will be yellow? Can someone show me how to work this problem out?
*Thursday, March 27, 2014 at 7:23pm*

**math i don"t get it**

why does (y-z) turn to (y+z) ??
*Thursday, March 27, 2014 at 7:18pm*

**math**

x^2-(y - z)^2 exactly the same way let a = x let b = y-z now you have a^2-b^2 = (a-b)(a+b) so [x -(y-z) ] [ x + (y-z) ] (x-y+z)(x+y-z) you were close
*Thursday, March 27, 2014 at 7:08pm*

**math-help!!**

oh okay thats for the first question i think but what about this question x^2-(y - z)^2 ??
*Thursday, March 27, 2014 at 7:04pm*

**math**

let x = (a-b) let y = c then you have x^2 - y^2 = (x-y)(x+y) now put in (a-b) for x and put in c for y
*Thursday, March 27, 2014 at 7:00pm*

**math-help me please!!**

^is that right??
*Thursday, March 27, 2014 at 6:59pm*

**math**

is the answer x^2 - (y - z)^2 = [x- (y-z)] [ x+ (y-z)] = (x-y-z) (x+y-z)
*Thursday, March 27, 2014 at 6:56pm*

**math**

so how do i do x^2 - (y - z)^2
*Thursday, March 27, 2014 at 6:54pm*

**math**

recall that x^2-y^2 = (x-y)(x+y) so, substitute in x = a-b and y=c.
*Thursday, March 27, 2014 at 6:52pm*

**MATH WORD PROBLEM**

b+c = 420 so c = 420 - b c = (3/4) b so 3 b/4 = 420 - b 3 b = 1680 - 4 b 7 b = 1680 b = 240 bears total b = sb + bb but bb = (9/7)sb so 240 = sb +(9/7) sb = (16/7)sb sb = 105 small bears bb = 240 - 105 = 136 big bears I will leave the last part for you
*Thursday, March 27, 2014 at 6:51pm*

**Math**

30
*Thursday, March 27, 2014 at 6:48pm*

**math**

how do you factor: (a - b)^2 - c^2
*Thursday, March 27, 2014 at 6:47pm*

**math**

y = 3x-1 is probably the simplest, but it could also be y = 2x+7 y = 23 y = (1+∛x)^3 - 4 or lots of other possibilities. There are infinitely many relations which will take 8 to 23.
*Thursday, March 27, 2014 at 6:38pm*

**math**

What is the rule if 8 is the input and 23 is the output
*Thursday, March 27, 2014 at 6:32pm*

**MATH WORD PROBLEM**

Diego works at a toy store. His boss tells him to order 420 stuffed bears and toy cars. He must order 4 stuffed bears for every 3 toy cars. a) If he must order 9 large stuffed bears for every 7 small stuffed bears, how many of each stuffed bear should he order? b) If Diego ...
*Thursday, March 27, 2014 at 6:22pm*

**Chemistry**

Look at your cellulose balance above and see how I did that step by step. 2Fe + O2 ==> 2FeO I don't understand why you have trouble with that. 4Fe + 3O2 ==> 2Fe2O3 This one can be a little trickier but here is how I do it. Fe + O2 ==> Fe2O3 I start a little ...
*Thursday, March 27, 2014 at 6:07pm*

**Math 117 **

Why is it important to find nonperfect roots in radical form to simplify the process of performing basic operations with radical expression?
*Thursday, March 27, 2014 at 5:46pm*

**math**

Meals: 0.75 * 600 = 450 Deserts: 0.625 * 600 = 375 Chairs: 0.6 * 600 = 360
*Thursday, March 27, 2014 at 5:41pm*

**math**

A downtown auditorium hosts large events. The auditorium can seat 600 people at one time. The sponsors of an awards dinner are using the auditorium for 450 people. The chef has prepared meals for 3/4 of the usual 600 people. The pastry chef has made enough dessert for 5/8 of ...
*Thursday, March 27, 2014 at 5:30pm*

**Math**

I really don't know the answer?
*Thursday, March 27, 2014 at 5:28pm*

**Math**

Quack. I'm a sheep
*Thursday, March 27, 2014 at 5:23pm*

**Math**

2 5/6
*Thursday, March 27, 2014 at 5:22pm*

**CHEMISTRY**

H2S ==> SO2 mols H2S = 20.0g/molar mass = approx 0.6 but you need to do it more accurately. There is 1 mol S in H2S and 1 mol S in SO2; therefore, you should be able to produce 0.6 mols SO2. Then g = mols x molar mass. Remember to do the math yourself because 0.6 is an ...
*Thursday, March 27, 2014 at 5:22pm*

**Math**

Figure it out on your own. It will make you smarter and help you learn how to solve this kind of problem.
*Thursday, March 27, 2014 at 5:21pm*

**Math please check my answer?**

You are welcome :)
*Thursday, March 27, 2014 at 4:56pm*

**Math please check my answer?**

Thank you. :)
*Thursday, March 27, 2014 at 4:56pm*

**Math**

4*4
*Thursday, March 27, 2014 at 4:54pm*

**Math please check my answer?**

By the way: https://www.wolframalpha.com/input/?i=e^%28x-4%29-2+
*Thursday, March 27, 2014 at 4:54pm*

**Math**

(5+4-1)*3 = 24 (4-3+1)*12 = 24 (9-7)*(10+2) = 24
*Thursday, March 27, 2014 at 4:53pm*

**Math please check my answer?**

again it has a horizontal asymptote of y = -2 as x--->-oo but is defined for all real x so yes, range is all real x
*Thursday, March 27, 2014 at 4:49pm*

**Math**

None of the functions you have listed seem to have zero denominators. This function has a horizontal asymptote at y = -1 as x --->-oo but is defined for all real x
*Thursday, March 27, 2014 at 4:47pm*

**Math please check my answer? **

This is my last question. What is the domain of the function below? f(x)= e^(x-4)-2 I got all real numbers is that correct?
*Thursday, March 27, 2014 at 4:41pm*

**math**

There is no sure answer since there is not a constant number of leaves per inch 2/3 = .67 leaves/inch 14/15 = .933 leaves /inch so 6 * .67 = 4.02 6 *.933 = 5.6 leaves per inch so probably more than four and less than 6 try 5 also see: http://www.jiskha.com/display.cgi?id=126&#...
*Thursday, March 27, 2014 at 4:38pm*

**Math**

yes, all real numbers again
*Thursday, March 27, 2014 at 4:31pm*

**Math**

yes, all real numbers
*Thursday, March 27, 2014 at 4:31pm*

**math**

There are 2 leaves along 3 in.of an ivy vine. There are 14 leaves along 15 in. of the same vine. How many leaves are there along 6 in. of the vine?
*Thursday, March 27, 2014 at 4:29pm*

**math**

5
*Thursday, March 27, 2014 at 4:27pm*

**Math**

I really need help
*Thursday, March 27, 2014 at 4:26pm*

**Math**

What is the domain of the function f(x)= x+6? I got -infinity < x < infinity
*Thursday, March 27, 2014 at 4:26pm*

**Math**

What is the domain of the function f(x)= -3^(x+3)+4? I got (-infinity, infinity) is that correct?
*Thursday, March 27, 2014 at 4:24pm*

**Math **

Try to make 24 using -,+,•,/ 1,5,4,3 & 3,12,4,1 & 10,9,7,2
*Thursday, March 27, 2014 at 4:15pm*

**Math **

What is the domain of the function f(x)=2^(x+3)-1? I got (-infinity, infinity) is that correct?
*Thursday, March 27, 2014 at 4:00pm*

**Math**

O say can u c
*Thursday, March 27, 2014 at 3:49pm*

**math**

To keep his wigwam
*Thursday, March 27, 2014 at 3:43pm*

**Math**

How many possible combinations are there if a spinner with 4 sections is spun twice?
*Thursday, March 27, 2014 at 3:39pm*

**Math**

nope. You had to add 37x to both sides, so it should be y = 37x + 82
*Thursday, March 27, 2014 at 3:26pm*

**Math**

sign error add 37 x to both sides f(x) = 37 x + 82
*Thursday, March 27, 2014 at 3:26pm*

**Math **

Rewrite the equation y - 37x = 82 as a function of x. I got f(x)= -37x +82 is that right?
*Thursday, March 27, 2014 at 3:23pm*

**Math**

20 - 28 = -8
*Thursday, March 27, 2014 at 2:28pm*

**Math**

The weather forecaster says it's 20 degrees Celsius in London but only 28 degrees colder in New York. What is the temperature in New York?
*Thursday, March 27, 2014 at 2:26pm*

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