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April 21, 2014

April 21, 2014

**Branches of Math**

**Recent Math Questions**

Post a New Question | Current Questions

**Need 8 grade math help quick please!**

Thank you!
*Friday, March 28, 2014 at 8:25pm*

**math**

It was in a steel box lined with layers and layers of bubble wrap ( one of the many ways my students use in the contest)
*Friday, March 28, 2014 at 8:23pm*

**math**

She would have 56 total. 28 + 28 = 56 So, 56 is the answer.
*Friday, March 28, 2014 at 8:17pm*

**math**

samantha has 28 and she gets 28 more how many would she have in all.
*Friday, March 28, 2014 at 8:12pm*

**math**

11:10 am
*Friday, March 28, 2014 at 7:59pm*

**Math **

The cafeteria has 4 cases of tuna and 9 single cans of tuna. In all,there are 65 can of tuna. How many cans of tuna are in a case? (P.S.-PLEASE SHOW WORK...I NEED HELP!Thank You!)
*Friday, March 28, 2014 at 7:49pm*

**math**

A wood burner burns 180 pounds of wood in 5/2 days . How many pounds of wood is needed for the burner in 1 month.
*Friday, March 28, 2014 at 7:48pm*

**math **

an real raw egg was dropped from a 20 story height , however it didn't break . How is that possible ? IT LANDED on concreate solid.
*Friday, March 28, 2014 at 7:47pm*

**Math for grade 6 peace**

96 = 0.48 x x = 96/0.48
*Friday, March 28, 2014 at 7:14pm*

**math**

http://www.jiskha.com/display.cgi?id=1396046268
*Friday, March 28, 2014 at 7:12pm*

**math help**

for 5 days 2/5 + 1/5 + 3/5 = 6/5*5 = 30/5 Sat 3 *4/5 = 12/5 Wed -2/5 for wet Pepper 30/5 + 12/5 - 2/5 = 40/5 = 8 hours
*Friday, March 28, 2014 at 7:11pm*

**Algebra**

Only you will know that. It's actually surprising how often basic math skills come in handy. Other than that, the mental skills developed when solving problems are definitely useful later in life, no matter the field of endeavor. Now, if you plan to find a sugar daddy/mama...
*Friday, March 28, 2014 at 7:05pm*

**math help**

Enrique charges $5 for every 1/5 hour he spends walking dogs. In the morning he walks Buttons for 2/5 hour, Bruno for 1/5 hour, and Pepper for 3/5 hour, Monday through Friday. On Saturdays he takes Mimi, Diva, and Coco to the dog park for 4/5 of an hour. On Wednesday this week...
*Friday, March 28, 2014 at 6:37pm*

**math**

Enrique charges $5 for every 1/5 hour he spends walking dogs. In the morning he walks Buttons for 2/5 hour, Bruno for 1/5 hour, and Pepper for 3/5 hour, Monday through Friday. On Saturdays he takes Mimi, Diva, and Coco to the dog park for 4/5 of an hour. On Wednesday this week...
*Friday, March 28, 2014 at 6:35pm*

**math**

Enrique charges $5 for every 1/5 hour he spends walking dogs. In the morning he walks Buttons for 2/5 hour, Bruno for 1/5 hour, and Pepper for 3/5 hour, Monday through Friday. On Saturdays he takes Mimi, Diva, and Coco to the dog park for 4/5 of an hour. On Wednesday this week...
*Friday, March 28, 2014 at 6:34pm*

**math**

4 * 6/5 + 4/5 + 1/5 = 29/5 = 5 4/5 hr How did You got 29 /5 where as here when iam calculating its coming 44/5. pls explain
*Friday, March 28, 2014 at 6:33pm*

**math**

Since kim ran 20 miles, sam ran HALF as much as Kim. Half = 20 divided by 2. That equals 10!!!
*Friday, March 28, 2014 at 6:30pm*

**Math for grade 6 peace**

The computer club is having a fundraiser to help pay for a trip to the science museum. So far they have raised $96, which is only 48% of their goal. How much money are they trying to raise?
*Friday, March 28, 2014 at 6:25pm*

**math**

Kara eats 4/5 of the food that Jillian does. If kara needs to bring 14lbs of food for the week, how much does Jillian need to bring.
*Friday, March 28, 2014 at 6:05pm*

**math**

Thank you
*Friday, March 28, 2014 at 5:27pm*

**math**

MTθF: 6/5 hr Sat: 4/5 hr W 1/5 hr 4 * 6/5 + 4/5 + 1/5 = 29/5 = 5 4/5 hr
*Friday, March 28, 2014 at 5:24pm*

**math help**

#2 is ok, but not yet complete: x^2-1 = (x-1)(x+1)
*Friday, March 28, 2014 at 5:21pm*

**math**

Enrique charges $5 for every 1/5 hour he spends walking dogs. In the morning he walks Buttons for 2/5 hour, Bruno for 1/5 hour, and Pepper for 3/5 hour, Monday through Friday. On Saturdays he takes Mimi, Diva, and Coco to the dog park for 4/5 of an hour. On Wednesday this week...
*Friday, March 28, 2014 at 5:19pm*

**Math**

v = (1/3)pi(r^2)h h = 2.8m r =d/2 = 6.8/2 = 3.4m v = (1/3)pi(3.4)^2(2.8)
*Friday, March 28, 2014 at 5:19pm*

**math help**

1. x^2 +2xy +y^2 -a^2-2ab-B^2 2. 6(x^4-1) = 6(x^2-1)(x^2 +1) = 6(x-1)(x+1)(x^2+1)
*Friday, March 28, 2014 at 5:14pm*

**math help**

factor: 1) (x+y)^2 - (a+b)^2 = [(x+y) - (a+b)] [(x+y) + (a+b)] = [x+y-a-b] [x+y+a+b] 2) 6x^4 - 6 = 6(x^4 - 1) = 6(x^2-1)(x^2+1) Is this right?
*Friday, March 28, 2014 at 5:00pm*

**Math 20-3**

v = 1/3 pi (3.4^2) (2.8) m^3
*Friday, March 28, 2014 at 4:43pm*

**Math**

A pile of gravel is conical in shape. If the diameter is approximately 6.8m and the height is 2.8m, what is the volume of gravel in the pile?
*Friday, March 28, 2014 at 4:41pm*

**Math 20-3**

A pile of gravel is conical in shape. If the diameter is approximately 6.8m and the height is 2.8m, what is the volume of gravel in the pile?
*Friday, March 28, 2014 at 4:39pm*

**MATH VERY URRRGENT!!!!!!!!!!!!!**

LOL...everyone from connexus is looking at this. xD
*Friday, March 28, 2014 at 3:23pm*

**3rd grade math**

Cannot draw here. Each person got 1 1/3 pieces.
*Friday, March 28, 2014 at 2:23pm*

**Math**

I am guessing that P(number < 2) is supposed to mean probability that the number is less than 2 What number ???? Are you tossing a die ? confirm
*Friday, March 28, 2014 at 2:16pm*

**logic and math**

Write the reciprocal and the anti-reciprocal of: That a quadrilateral has 4 equal sides, is a necessary condition for that it is a square. That a triangle has 2 equal sides, is a necessary condition for that it is isosceles. Only if f is integrable in an I interval, f is ...
*Friday, March 28, 2014 at 12:50pm*

**logic and math**

Calculate the truth value (f or V) a. Is it true that if (the Papaya is a fruit from the Caricaseas or the Pitahaya is the fruit of a plat from the Cactaseas) then (el Cohombro is a fruit of a plant from the family of the Cucurbitaceas or the Nisper is a fruit of a tree from ...
*Friday, March 28, 2014 at 12:47pm*

**Math**

1. P(Number<2) A. 1/6 B. 2/6 C. 4/6 D. 3/6 2. P(Number>3) A.4/6 B.1/6 C.2/6 D.5/ 3. P(Complement of 4) A.1/6 B.5/6 C.2/6 D.4/6 4. A multiple choice question has 5 possible answers. What are the odds in favor of guessing the right answer? A.1:5 B.2:2 C.3:1 D.1:3
*Friday, March 28, 2014 at 12:20pm*

**Math**

@Steve: Thank you for the help as well, no there isn't a typo. Sometimes the math we're doing is quite confusing. Thank you for the help. c:
*Friday, March 28, 2014 at 11:29am*

**Math**

@Reniy: Yes those were the answers I came up with. I couldn't figure out what I was doing wrong, turns out I was doing the first one right and the second one was a bit off. Thank you for the help.
*Friday, March 28, 2014 at 11:23am*

**Language Art (Please Check)**

1.C 2.A 3.C 4.C 5.D 6.D 7.B 1.She was rivaling the mayor by A.sending money to him. B.voting for him. C.running against him. 2.In which of the following situations would you be most likely to be caught up in a commotion? A.a riot B.a math exam C.a school assembly 3.Which of ...
*Friday, March 28, 2014 at 10:53am*

**math**

we need <x,y> such that <x,y> + <6/√2,6/√2> = <0,-20> Now it's easy to get x and y, and thence the speed and direction.
*Friday, March 28, 2014 at 5:51am*

**Need 8 grade math help quick please!**

there is only one number less than 2, and six possible throws. So, P(n<2) = 1/6 Similarly, P(n>=3) = P(n∊{3,4,5,6}) = 4/6 = 2/3 P(n≠4) = 1-P(n=4) = 1 - 1/6 = 5/6
*Friday, March 28, 2014 at 5:49am*

**math**

Differentiate cost function and equate it to 0, i.e. 0.1(2x)-1.2=0 or x=1.2/0.2=6; Second derivative is0.2which is+ve hence it corresponds to minimum cost level. Hence x=6,i.e. 600 bikes. Cost/bike for 600 bikes will be =0.1x36-1.2x6+4.993=1.393 hunderd $. For 590 and 610 ...
*Friday, March 28, 2014 at 5:17am*

**Need 8 grade math help quick please!**

I don't understand this. I don't get exactly what I'm supposed to do with the P(parenthes) thingy or how each question differs from the next. Theoretical and Experimental Probability: A number cube with the numbers 1 through 6 is rolled. Find the given probability...
*Friday, March 28, 2014 at 3:14am*

**College math**

f(x)=x^2+7 upward 8 units
*Friday, March 28, 2014 at 2:17am*

**math**

J's bike has determined that when x hundred bikes are built, the average cost per bike is given by C(x)= 0.1x^2-1.2x+4.993, where C(x) is in hundreds of dollars. how many bikes should the shop build to minimize the average cost per bike?
*Friday, March 28, 2014 at 1:37am*

**math**

A boat needs to travel south at a speed of 20 km/h. However a constant current of 6 km/h is flowing from the south-east. Use vectors to find: a.the equivalent speed in still water for the boat to achieve the actual speed of 20 km/h. b the direction in which the boat must head ...
*Friday, March 28, 2014 at 1:22am*

**math**

j=g j-2055 = g/4 = j/4 3/4 j = 2055 j = 2740
*Friday, March 28, 2014 at 12:32am*

**MATH HELP**

If both lines go through (0,0), then one line has slope -2/3, so the other line has slope 3/2. so, s = 2/3
*Friday, March 28, 2014 at 12:29am*

**math 5th**

help
*Friday, March 28, 2014 at 12:28am*

**MATH Fractions**

thank you it is march and i found this helpful 2 months after your posting!
*Friday, March 28, 2014 at 12:25am*

**Math**

a = 2pi*r(r+h) = 2pi*6*26 = 979.68 Hmmm. That includes both ends. The lateral area is a = 2pi*r*h = 2pi*6*20 = 753.6 Is there a typo somewhere? 2pi*6*24 = 904.3, so (D)
*Friday, March 28, 2014 at 12:25am*

**Math**

Imagine "opening up" a cylinder, what would you get? 2 equal circles + a rectangle whose length is the circumference of the circle and whose height is the height of the cylinder. so SA = 2π(6^2) + 2π(6)(20) = 72π + 240π = 312π = appr 980 No ...
*Friday, March 28, 2014 at 12:23am*

**math**

change per year is (8750-23500)/8 = -1843.75 so, what's -1843.75/23500?
*Friday, March 28, 2014 at 12:17am*

**3rd grade math**

if there were x pieces to start, x/5 = 2 x = 10
*Friday, March 28, 2014 at 12:15am*

**Math**

no, 26x^2 ≠ x√26 Whatever made you think so. let x = 4 26(4^2) = 26*16 = 416 xV26 = 4√26 = appr 20.4 is 416 = 20.4 ???? However, you could write 26x^ as (x√26)^2
*Friday, March 28, 2014 at 12:15am*

**Math**

6 bags uses 5 pounds 12 bags uses 10 pounds, or 5 large bags.
*Friday, March 28, 2014 at 12:14am*

**Math**

treat it as two ordered pairs (t, c) where t is temperature and c is consumption so we have (90,220) and (76, 178) slope = (220-178)(/(90-76) = 42/14 = 3 so: c-220 = 3(t-90) c = 3t - 270+220 c = 3t - 50 check: if t = 90, c = 270-50 = 220 if t = 76, c = 228 - 50 = 178
*Friday, March 28, 2014 at 12:11am*

**Math **

Chads buys peanuts in 2 pound bags. How many 2 pound bags of peanut should chad buy so that he can fill the 5/6 pound bags without having any peanuts left over
*Friday, March 28, 2014 at 12:11am*

**3rd grade math**

suppose there are 2 pieces of the cake left over but you dont know how many pieces there were in the whole cake. explain how you could find the number of pieces in the whole cake if taylor told you that 1/5 of the cake was left.
*Friday, March 28, 2014 at 12:06am*

**math**

when u get this answer let me know! i am stuck on the same one!!! but i think that the question should read cut a cake into 8 pieces...
*Friday, March 28, 2014 at 12:05am*

**math**

avg rate of change = (23500 - 8750)/(8 = ...
*Friday, March 28, 2014 at 12:03am*

**Math**

I assume you pick a card, then throw the die primes from 1-10 : 2,3,5,7 , so 4 of them primes on a die: 2 3 5, so 3 of them prob(2 primes) = (4/10)(3/6) = 1/5 prob(not 2 primes) = 4/5 odds in favour of getting two primes = (1/5) : (4/5 = 1 : 4
*Thursday, March 27, 2014 at 11:59pm*

**3rd grade math**

suppose she cut the cake into 8 equal size pieces and 6 people at all the pieces. Explain how they could have divided the pieces so that everyone ate the same amount of cake. You can show your work in a drawing.
*Thursday, March 27, 2014 at 11:56pm*

**2nd question - math help!!**

(x+y)^2-x-y = (x+y)^2 - (x+y) = (x+y)(x + y - 1)
*Thursday, March 27, 2014 at 11:55pm*

**math help!!**

To make it easier to see, let 2x^2 - x = a so you have 2a^2 - 3a - 9 = (a-3)(2a+3) put the original back in = (2x^2 - x - 3)(4x^2 - 2x + 3) = (x + 1)(2x - 3)(4x^2 - 2x + 3)
*Thursday, March 27, 2014 at 11:53pm*

**math**

vehicles lose value over time. A car is purchased for $23 500, but it is worth only $8750 after eight years. What is the average annual rate of change in the value of the car, as a percent?
*Thursday, March 27, 2014 at 11:14pm*

**Math**

a trainer for a professional football team keeps track of the amount of water players consume throughout practice. the trainer observes that the amount of water consumed is a linear function of the temperature on a given day. the trainer finds that when its 90 degrees the ...
*Thursday, March 27, 2014 at 11:11pm*

**math**

vehicles lose value over time. A car is purchased for $23 500, but it is worth only $8750 after eight years. What is the average annual rate of change in the value of the car, as a percent?
*Thursday, March 27, 2014 at 11:09pm*

**Math**

You're welcome.
*Thursday, March 27, 2014 at 10:59pm*

**math**

37.5 * 0.08 = $3.00 tax (37.5 + 3.00) * 1.18 = _______ total
*Thursday, March 27, 2014 at 10:58pm*

**math**

You're right.
*Thursday, March 27, 2014 at 10:53pm*

**math**

A group of friends went to lunch. The bill, before sales tax and tip, was $37.50 . A sales tax of 8% was added. The group then tipped 18% on the amount after the sales tax was added. What was the amount, in dollars, of the sales tax? What was the total amount the group paid, ...
*Thursday, March 27, 2014 at 10:50pm*

**Math**

THANK YOU!!
*Thursday, March 27, 2014 at 10:50pm*

**math help!! ANYONE?!?!**

someone please help!!!!
*Thursday, March 27, 2014 at 10:49pm*

**math**

I forgot to put the answer which is no
*Thursday, March 27, 2014 at 10:44pm*

**math**

can you produce a 2-digit whole number by multiplying two-digit whole numbers?
*Thursday, March 27, 2014 at 10:42pm*

**Math**

Can 26x^2 be written as x*sqrt26?
*Thursday, March 27, 2014 at 10:42pm*

**Math**

I was wondering if you can help me with math real quickly. I just cant figure this out. For the first question I have to find the surface area for the given cylinder. I have to use 3.14 and round to the nearest whole number. The radius is 6ft and the height is 20 ft. A. 180 ...
*Thursday, March 27, 2014 at 10:37pm*

**Math**

Mr. Garcia pays $834 for some model cars and model planes. Each model car cost $52. and each model plane cost $14. less than each model car. Mr. Garcia buys 3 more planes than cars. How many model planes does he buy?
*Thursday, March 27, 2014 at 10:29pm*

**math help me pleasee!!**

help mee with the two questions, i don't get it and i have a test tomorrow!
*Thursday, March 27, 2014 at 10:27pm*

**math help!!**

okay thankyou so much!! :-)
*Thursday, March 27, 2014 at 10:25pm*

**Math**

5% = 5/100 = 1/20
*Thursday, March 27, 2014 at 10:23pm*

**Math**

2 1/2 hours = 150 minutes (150/3) * 2 = ?
*Thursday, March 27, 2014 at 10:21pm*

**Math**

What is 7 sqrt 8 - 2 sqrt 8?
*Thursday, March 27, 2014 at 10:20pm*

**MATH HELP**

.................| .........(3,2)\..|../ ...............\.|./(s,1) ................\|/ -----------------|------------------- ................/|\ .............../.|.\ .................| .................| In the accompanying figure, the slope of line k is t and the slpe of line...
*Thursday, March 27, 2014 at 10:16pm*

**Math**

There are 120 students trying out for the play. Only 5% of those trying out will have a speaking part. Write this percent as a fraction in its lowest terms.
*Thursday, March 27, 2014 at 10:11pm*

**math help!!**

i also need help with this question factor: (x+y)^2-x-y
*Thursday, March 27, 2014 at 10:10pm*

**Math **

Reggie is a long distance runner. His daily 2-1/2 hour practice is divided evenly into three areas: warm-ups, running, and cool down. How many minutes total does Reggie spend warming up and cooling down each day at practice?
*Thursday, March 27, 2014 at 10:09pm*

**Math**

You have cards numbered 1-10 and a number cube what are the odds of getting two prime numbers? The book says 1\5 but how do they get it.
*Thursday, March 27, 2014 at 10:08pm*

**math help!!**

Factor: 2(2x^2-x)^2-3(2x^2-x)-9
*Thursday, March 27, 2014 at 10:06pm*

**math**

Mrs. Jones and Mr. Graham had the same amount of money at first. After Mrs. Jones bought a computer that cost $2,055, she had 1/4 as much money as Mr. Graham. How much money did Mr. Graham have?
*Thursday, March 27, 2014 at 9:54pm*

**Math**

x + 15 + 2x + 27 = 180 3 x = 138 x = 46
*Thursday, March 27, 2014 at 9:38pm*

**math help!!**

[ (x^2+5x) - 6 ] [(x^2+5x) + 6 ] (x^2 + 5 x - 6) (x^2 + 5x + 6) now if the back of your book says (x^2 + 5 x + 6)( x^2 + 5 x - 6) That is the SAME
*Thursday, March 27, 2014 at 9:34pm*

**math help!!**

You got the second one, just reversed x y = y x !
*Thursday, March 27, 2014 at 9:31pm*

**math help**

That is exactly what we got x y = y x the order is just reversed
*Thursday, March 27, 2014 at 9:29pm*

**Math**

If x+15 and 2x+27 represent the number of degrees in measures of two consecutive angles of a parallelogram, find the value of x.
*Thursday, March 27, 2014 at 9:27pm*

**math**

you could do a square with the base as 4 then the height as a 11 then add another figure which has idk because I had that problem
*Thursday, March 27, 2014 at 9:26pm*

**math-still confused**

the answers at the back of the textbook say that the answer is (a-b+c-d)(a-b-c+d) i don't get it :$
*Thursday, March 27, 2014 at 9:22pm*

**math help**

LOL, no need for wolfram !
*Thursday, March 27, 2014 at 9:19pm*

**math help**

remember - -d = + d
*Thursday, March 27, 2014 at 9:19pm*

**math help!!**

factor: (x^2+5x)^2 - 36 and (a-b)^2 - (c-d)^2 show the steps pleasee!
*Thursday, March 27, 2014 at 9:18pm*

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