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April 16, 2014

April 16, 2014

**Branches of Math**

**Recent Math Questions**

Post a New Question | Current Questions

**Math **

A glass box shaped like a rectangular prism has with 7 inches length 9 inches height 12 inches is being shipped in a larger box with whipped 10 inches length 10 inches in height 15 inches the space between the glass box on the shipping box will with styrofoam peanuts how many ...
*Sunday, March 30, 2014 at 12:04pm*

**math**

In a certain state, it has been shown that only 56% of the high school graduates who are capable of college work actually enroll in colleges.Find the probability that, among the 11 capable high school graduates in this state, each number will enroll in college. all 11
*Sunday, March 30, 2014 at 11:59am*

**math**

We will need to find the sides angle P = 180 - 60 - 75 = 45° let PQ=x , QR = y , PR = z x/sin75 = y/sin45 = z/sin60 let's assign an arbitrary value of y = 1 to our smallest side using x/sin75 = 1/sin45 we get x = .1.366025 using 1/sin45 = z/sin60 z = 1.224745 so sum of...
*Sunday, March 30, 2014 at 11:42am*

**Math**

Katie makes 70% of her free throws. How many consecutive shots would she have to make to reach 75%
*Sunday, March 30, 2014 at 10:16am*

**math**

I did the exactly 7, follow my steps to get the others. On the less than three, do zero first, then exactly1, and exactly 2, then add those to get less than three.
*Sunday, March 30, 2014 at 10:05am*

**math**

I wonder how anyone can measure who is capable of college work? Exactly what is "college work" anyway? From my observation of all these online students enrolled in "colleges", being told they are doing "college work", and getting "degrees&...
*Sunday, March 30, 2014 at 10:04am*

**math**

In a certain state, it has been shown that only 56% of the high school graduates who are capable of college work actually enroll in colleges.Find the probability that, among the 11 capable high school graduates in this state, each number will enroll in college. a. Exactly 7 b...
*Sunday, March 30, 2014 at 9:32am*

**math**

construct a triangle PQR in which angle Q = 60 degree , angle R = 75 degree and the sum of three sides is 12 cm
*Sunday, March 30, 2014 at 8:52am*

**math**

heck no. a pipe of half the diameter only has 1/4 the area. So, for a given speed of the water, only half the volume is obtained.
*Sunday, March 30, 2014 at 6:29am*

**math**

oops a+3x = 50
*Saturday, March 29, 2014 at 11:01pm*

**math**

If adam is a now, then a - 1/2 = 12 a = 12 1/2 a + x/2 = 2x 12 1/2 + x/2 = 2x 25 + x = 4x x = 25/3 check: 25/6 + 25/2 = 25(2/3) = 2 * 25/3 25/2 + 75/3 = 100
*Saturday, March 29, 2014 at 10:59pm*

**math**

assuming y is in billions, c(y) = 200 + .6y c(8250) = 200 + .6(8250) = 5150 or, 5.2 trillion looks ok to me. (b) subtract their spending from their income.
*Saturday, March 29, 2014 at 10:54pm*

**math**

If the consumption function is C = $200 billion + 0.6Y, (a) How much do consumers spend with incomes of $8.25 trillion? I got 5.2 trillion for this. (b) How much do they save? ??
*Saturday, March 29, 2014 at 8:58pm*

**math**

if 1/2 years ago adam was 12, and 1/2x years from now he will be 2x years old, how old will he be 3x years from now
*Saturday, March 29, 2014 at 8:42pm*

**Math**

ways to choose 5 of the 6 multiple choices = C(9,5) = 126 number of ways to choose 2 of the 6 essay questions = C(6,2) = 15 number of ways to answer the test = 126x15 or 1890 ways
*Saturday, March 29, 2014 at 7:17pm*

**Math**

A physics exam consists of 9 multiple-choice questions and 6 open-ended problems in which all work must be shown. If an examinee must answer 5 of the multiple-choice questions and 2 of the open-ended problems, in how many ways can the questions and problems be chosen?
*Saturday, March 29, 2014 at 7:08pm*

**math**

you have a 2.5 od pipe can you get the same flow from two 1.and a quarter od pipe
*Saturday, March 29, 2014 at 6:57pm*

**math**

I will assume you meant: log3 (2x + 5) = 1 then 2x+5 = 3^1 2x = -2 x = -1 If otherwise, let me know
*Saturday, March 29, 2014 at 6:25pm*

**math**

Solve this equation for x Log3^2x+5 =1
*Saturday, March 29, 2014 at 6:14pm*

**survey math 140**

Number of ways to select 5 of 19 is C(19,5) = 19!/(5!14!) = 11628 most calculators have that function built-in look for something like nCr
*Saturday, March 29, 2014 at 4:45pm*

**math - incomplete**

and the other method is ... ?
*Saturday, March 29, 2014 at 4:39pm*

**Calculus**

Thanks Steve! Finally got this one correct on Math Lab! I am eternally grateful, and have made an account here so I can get help and I have already tried helping others as well. I am very pleased with the service of this site and am glad to have found it :) Hooray!!!
*Saturday, March 29, 2014 at 4:34pm*

**math**

A bag contains 3 red marbles, 3 blue marbles and 3 yellow marbles. Which of the following methods of selecting 2 marbles will have the greater probability of choosing 2 red marbles? Randomly choose a marble don't replace it then randomly choose another marble
*Saturday, March 29, 2014 at 4:24pm*

**survey math 140**

a textbook search is considering 19 books for possible adoption. the committee has decided to select 5 of the 19 for furture consideration in how many way can id do so
*Saturday, March 29, 2014 at 3:37pm*

**math**

1000 * .90 * .90 = ?
*Saturday, March 29, 2014 at 3:09pm*

**MATH**

d
*Saturday, March 29, 2014 at 1:08pm*

**math**

5/4 * 14 = ?
*Saturday, March 29, 2014 at 11:46am*

**math**

(b) Round to nearest two decimal places.
*Saturday, March 29, 2014 at 9:58am*

**math**

Suppose you borrow $1,000 of principal that must be repaid at the end of two years, along with interest of 5 percent a year. If the annual inflation rate turns out to be 10 percent, (a) What is the real rate of interest on the loan? For this I got -5%. (b) What is the real ...
*Saturday, March 29, 2014 at 9:56am*

**math**

1. For n repeated independent trials, with constant probability of success p for all trials, find the probability of exactly x successes in the following exercises.Round your final answers to three decimal places. a.n = 7, p = ¼ , x = 4
*Saturday, March 29, 2014 at 9:08am*

**math**

If true, prove. If false, provide just a counterexample: a. For every function f from nonnegative integers into nonnegative reals, o( f ) = O( f ) −Θ( f ) . (Here, “-“ denotes the set difference: A – B consists of elements in A that are not in B.).
*Saturday, March 29, 2014 at 1:37am*

**Algebra**

If Literature, history and French are your life loves, then algebra probably will not be a great part of your life. But, life consists of a wide variety of experiences, and I guarantee you that some basic math know-how (yes, even including algebra) will make things easier. So...
*Saturday, March 29, 2014 at 12:25am*

**math**

you mean how many zeros I think look at b^2-4ac 49 -16*8 is NEGATIVE so two complex conjugate solutions, NO real solutions
*Friday, March 28, 2014 at 11:41pm*

**math**

how many real number solutions does the equation have y = -4x^2 + 7x - 8 no solutions (is it this one) one solution two solutions infinitely many solutions
*Friday, March 28, 2014 at 11:26pm*

**math**

You are welcome:)
*Friday, March 28, 2014 at 11:16pm*

**Math/precalc**

Sorry tangent period is pi, not 2 pi so (2/3) x = 1 pi x = 3 pi/2 = period
*Friday, March 28, 2014 at 11:13pm*

**Math/precalc**

I do not think amplitude means much for a tangent function which goes to infinity twice a period so I would not say 3 but maybe undefined. when the x term increases to 2 pi from 0 we have gone a period so (2/3) x = 2 pi x = 3 pi when we have gone a period period = 3 pi
*Friday, March 28, 2014 at 11:09pm*

**math**

find the zeros of that parabola, use the + one (I turned the parabola upside down because I like positive x^2 term) .06 x^2 - 9.6 x - 5.4 = 0 use x = [-b +/- sqrt(b^2-4ac) ]/2a while I use wolfram alpha http://www.wolframalpha.com/input/?i=+.06+x^2+-+9.6+x+-+5.4+%3D+0...
*Friday, March 28, 2014 at 11:04pm*

**6th Grade Math**

Blue = 3/10 Red = 4/10 = 2/5 Green = 3/10
*Friday, March 28, 2014 at 11:02pm*

**math**

A model rocket is launched from a roof into a large field. The path of the rocket can be modeled by the equation y = -0.06x^2 + 9.6x + 5.4 where x is the horizontal distance, in meters from the starting point on the roof and y is the height in meters of the rocket above the ...
*Friday, March 28, 2014 at 10:49pm*

**math**

Thank you omygosh you guys saved me!
*Friday, March 28, 2014 at 10:46pm*

**math**

h ( t ) = a t ^ 2 + b t + c h ( t ) = – 16 t ^ 2 + 20 t + 2 a = - 16 b = 20 c = 2 t - coordinate of minimum point t = - b / 2 a t = - 20 / [ 2 * - 16 ) ] t = - 20 / - 32 = 20 / 32 = 4 * 5 / ( 4 * 8 ) = 5 / 8 = 0.625 h - coordinate of minimum point h = - ( b ^ 2 - 4 a c...
*Friday, March 28, 2014 at 10:41pm*

**math**

assume no calculus allowed thus complete he square to find the vertex of this parabola 16 t^2 - 20 t - 2 = -h 16 t^2 -20 t = - h + 2 t^2 - 5/4 t = - h/16 + 1/8 t^2- 5/4 t+ 25/64 = -h/16 + 8/64 + 25/64 (t - 5/8)^2 = -(1/16)(h - 33/4) so in 5/8 of a second it reaches the vertex ...
*Friday, March 28, 2014 at 10:37pm*

**Math/precalc**

What is the period and amplitude of y=3tan(2/3x-pi/6)? Thanks!
*Friday, March 28, 2014 at 10:26pm*

**math**

A ball is thrown into the air with an upward velocity of 20 ft/s. Its height (h) in feet after t seconds is given by the function h(t) = –16t^2 + 20t + 2. How long does it take the ball to reach its maximum height? What is the ball’s maximum height? Round to the ...
*Friday, March 28, 2014 at 10:09pm*

**Math**

Which pair of numbers is equilvalent to 47.5% A.475/100,0.475 B.475/100,475 C.475/1000,4.75 D.475/1000,0.475
*Friday, March 28, 2014 at 9:41pm*

**Math**

4 x + 9 = 65 subtract 9 from both sides 4 x = 56 divide both sides by 4 x = 14
*Friday, March 28, 2014 at 8:27pm*

**math**

180 lbs/2.5 days = 72 lbs/day 72 lbs / day * 30 days = 2160 lbs about one ton, two half ton pickups full
*Friday, March 28, 2014 at 8:26pm*

**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*

**geometry**

Just go tell your teacher to !@#$%^& off cuz this !@#$%^& is stupid and dont nobody want to do this bull!@#$%^&..
*Friday, March 28, 2014 at 11:02am*

**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*

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