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August 22, 2014

August 22, 2014

**Branches of Math**

**Recent Math Questions**

Post a New Question | Current Questions

**math**

A specially made pair of dice has only one- and two-spots on the faces. One of the dice has three faces with one-spot and three faces with two-spot. The other die has two faces with one-spot and four faces with a two-spot. One of the dice is selected at random and then rolled ...
*Thursday, July 31, 2014 at 4:53pm*

**math**

a bowl of fruit has 3 strawberries, 2 banannas and 1 apple. what fraction of the fruit is banannas?
*Thursday, July 31, 2014 at 1:05pm*

**Math**

A particle moves with a velocity of v(t)=3cos(2t) m/s along an axis. Find the distance traveled by the particle over the time interval 0 is less than or equal to "t", which is less than or equal to (pi/8)
*Thursday, July 31, 2014 at 11:40am*

**Math**

find the area of the region bounded by the function y=-x^2+5x-4 and the x-axis
*Thursday, July 31, 2014 at 11:37am*

**Math**

Of the books in a library, 1/3 came from Robbie's collection and 15 came from from Marta's. Of the rest 15 were Elena's, 1/5 were Winfield's, and 5 were purchased from the bookstore. How many books are there in the library?
*Thursday, July 31, 2014 at 10:44am*

**math**

Kendra bought 4 paintings and wants to hang them side by side on a wall in her bedroom. However, only 3 of the paintings will fit side by side on this wall. How many different ways can Kendra arrange 3 of the 4 paintings on the wall?
*Thursday, July 31, 2014 at 10:23am*

**To Ms. Sue**

Ms. Sue Hi! Im not sure if you will be able to help me with this one, since is Math homework, but this time is just to confirm if Im right the question is: What is 1,112,433 rounded to the nearest ten thousand? A. 1,120,000 B. 1,100,000 C. 1,110,000 D. 1,200,000 I picked B ...
*Thursday, July 31, 2014 at 9:39am*

**math(precalculus)**

Write the equation of a Rational Function satisfying given conditions. Has vertical asymptotes located at x-2 and x=-1 Has a horizontal asymptote located at y=0(x-axis) y-intercept:(0,2) x-intercept (4,0) R(x)= ??? what I did is, R(x)= ax+b/c(x-2)(x+1) then plug in (0,2), b=-...
*Thursday, July 31, 2014 at 8:43am*

**math**

find the sum of 3/6+4/10+3/30 and reduce to lowest term
*Thursday, July 31, 2014 at 8:15am*

**Math**

There are some rabbits and chickens in a farm. Together they have 35 heads and 94 feet. How many rabbits? How many chickens?
*Thursday, July 31, 2014 at 7:33am*

**math**

6. Joe played golf with Sam on a speacial par 3 course.. They played nine holes. The expected number of strokes on hole was 3. A birdie is 1 below par. On nine holes Frank made par on 1 hole, got 2 birdies, one eagle, four bogies and one double bogie. How many points above or ...
*Thursday, July 31, 2014 at 6:17am*

**math**

1. A submarine was suituated 800 feet below sea level. If it ascends 250 feet, what is it new position 2. Metal mercury at room temperature is a liquid. Its melting point is -39°C. The freezing point of alcohol is-114°C. How much warmer is the melting point of mercury ...
*Thursday, July 31, 2014 at 5:57am*

**math**

if 4,2x-4,......,64,21x+2 are the terms of GP . find the value of x ?
*Wednesday, July 30, 2014 at 11:04pm*

**Math **

If A=<2,1> and B=<-1,1>, find the magnitude and direction angle for -2A +3B Find all specified roots: Cube roots of 8i A parallelogram has sides of length 32.7cm and 20.2cm. If the longer diagonal has a length of 35.1cm, what is the angle opposite this diagonal?
*Wednesday, July 30, 2014 at 8:23pm*

**Math**

The water level (y) in a tank oscillates between 4 feet and 10 feet. It takes 20 seconds for the water level to go from 4 feet to 10 feet and seconds to go from 10 feet to 4 feet. At time(t)=0 seconds, the water level (y) is 10 feet. 1. Write the equation for the depth in the ...
*Wednesday, July 30, 2014 at 8:19pm*

**math**

you and afriend go to a county fair and each spin a wheel.The weel is divided into ten equal sections find the probability of the event. You win free admission and your friend loses
*Wednesday, July 30, 2014 at 8:07pm*

**math**

Of the books in a library, 1/3 came from Robbie's collection and 15 came from Marta's. Of the rest, 15 were Elena's 1/5 were Winfield's, and 5 were purchased from the bookstore. How many book are there in the library?
*Wednesday, July 30, 2014 at 8:02pm*

**math**

How many quarts of water must be added to 18 quarts of a 32% alcohol solution to dilute it to a solution that is only 12% alcohol.
*Wednesday, July 30, 2014 at 7:08pm*

**math**

1.A father can do a job in a certain number of hours. His son takes twice as long to do the job. Working together, they can do the job in 6 hours. How many hours does it take the father to do the job alone? A.9 B.18 C.12 D.10 3.David is 5 years older than Paul. In 5 years, ...
*Wednesday, July 30, 2014 at 6:42pm*

**math**

Avery paid $168 on a cell phone. What was the original price of the phone if he got it at a 30 percent discount?
*Wednesday, July 30, 2014 at 6:32pm*

**math **

This was on my test and have a few more question that is from my test. 18.The Sum of five unequal natural numbers is 90. The second largest of these five numbers can be at the most? A.19 B.41(41 is the right answer) C.44 D.43 E.42 please show work. 22.In what month does the ...
*Wednesday, July 30, 2014 at 6:25pm*

**math**

Michelle will divide 36 herbal tea bags and 48 mint tea bags among gift boxes. Each gift box will have the same number of herbal tea bags and the same number of mint tea bags. What is the greatest number of gift boxes Michelle can make?
*Wednesday, July 30, 2014 at 5:50pm*

**math**

I am not sure how to do these. 1. Simplify 4√6/√30 by rationalizing the denominator. Show your work. 2. Simplify (2√5 + 3√7)^2 Show your work. Justify each step.
*Wednesday, July 30, 2014 at 4:22pm*

**Math**

Brian gave 20% of his baseball cards to Scott and 15% to Adam. If he still had 520 cards, how many did he have originally?
*Wednesday, July 30, 2014 at 3:06pm*

**math**

Lisa can make a costume twice as fast Justin can. If they both work together, they can make it in 8 hours. How long will it take Mary to make the costume if he works alone?
*Wednesday, July 30, 2014 at 2:21pm*

**math**

Sam had a total of 80 foreign stamps and local stamps combined. After giving away 1/3 of his foreign stamps and 10 local stamps, he had an equal number of foreign stamps and local stamps left. How many local stamps did he have in the beginning?
*Wednesday, July 30, 2014 at 2:19pm*

**Math**

Mike can complete a project in 60 minutes͵ and if Mike and Walter both work on the project͵ they can complete it in 40 minutes. How long will it take Walter to complete the project by himself?
*Wednesday, July 30, 2014 at 9:56am*

**Math**

Frances can type 100 pages in h hours. At this rate, how many pages can she type in m minutes? A. mh/60 B. 60m/h C. 100m/60m D. 60h/100m E. 100h/60m
*Wednesday, July 30, 2014 at 9:18am*

**Math; Alegbra**

A sphere and a cone have the same volume. Each figure has a radius of 3 inches. What is the height of the cone?
*Wednesday, July 30, 2014 at 6:58am*

**Math**

Let R be the statement : for all sets A, B and C, if A⊆B∪C and B ⊆C∪A then AΔB = C. Q: Is R true for all sets A, B and C? Prove answer Let S be the statement: for all sets A, B, and C, if AΔB = AΔC then B⊆C. Q: Is S true? prove answer
*Wednesday, July 30, 2014 at 6:41am*

**Math**

The endpoints of a diagonal of a square are (-2,2) and (1,5). What is the area of the square?
*Wednesday, July 30, 2014 at 12:25am*

**math**

What is the angle of elevation of the sun when a tree 7.15m tall casts a shadow 10.1m long
*Wednesday, July 30, 2014 at 12:10am*

**Math**

Find an equation of the curve that satisfies the given conditions: (d^2y/dx^2)=6x, the line y=5-3x is tangent to the curve at x=1
*Tuesday, July 29, 2014 at 11:37pm*

**math**

A specially made pair of dice has only one- and two-spots on the faces. One of the dice has three faces with one-spot and three faces with two-spot. The other die has two faces with one-spot and four faces with a two-spot. One of the dice is selected at random and then rolled ...
*Tuesday, July 29, 2014 at 11:26pm*

**Math**

Suppose you own a tour bus and you book groups of 20 to 70 people for a day tour. the cost per person is $30 minus $0.25 for every ticket sold. Gas and other miscellaneous costs are $200. Part a) Write the revenue and cost functions for this situation Part b)Write the profit ...
*Tuesday, July 29, 2014 at 11:08pm*

**Math **

solve the following system of equations using matrices 4x-2y=7 7x+y=13
*Tuesday, July 29, 2014 at 10:10pm*

**math**

1. Read the following statements: I. All trapezoids consist of two parallel sides. II. The base angles of all trapezoids are equal in measure. III. The lengths of the tall trapezoids legs are equal in measure. Which of the above statements are true? II only I only I, II, and ...
*Tuesday, July 29, 2014 at 9:07pm*

**Math**

At a speed of 48 miles per hour, how mnay minutes will it take to drive 40 miles? Is it 32 minutes?
*Tuesday, July 29, 2014 at 8:48pm*

**Math**

using sin(alpha-beta)=(sin alpha)(cos beta)-(cos alpha)(sin beta) use the identity to derive the result proof for : sin(alpha-beta) PLEASE PLEASE PLEASE HELP
*Tuesday, July 29, 2014 at 8:06pm*

**Math**

Two trains are travelling on parallel tracks both going from station A to station B.Train 1 leaves at 8 am, at 65 miles per hour. Train 2 leaves at 10 am, at 90 miles per hour. At what time will train 2 catch up to train 1?
*Tuesday, July 29, 2014 at 7:33pm*

**math**

A school booster club is selling T-shirts. The silk screening company is selling shirts to the boosters for $3 each, plus a one-time fee of $150 to cover supply costs. If the boosters want to make at least $300 in profits and they sell a shirt for $12, how many shirts do they ...
*Tuesday, July 29, 2014 at 7:16pm*

**Math**

what is 3.50% of $875.00 and how do I do it on a calculator? I feel sooooo stupid....
*Tuesday, July 29, 2014 at 5:02pm*

**Math**

Please help me find the process or fuction rule if input numbers are 1;2;3;4 and output numbers are 4;8;16;32. Please help me
*Tuesday, July 29, 2014 at 5:00pm*

**Math**

Let R be the statement : for all sets A, B and C, if A⊆B∪C and B ⊆C∪A then AΔB = C. Q: Is R true for all sets A, B and C? Prove answer Let S be the statement: for all sets A, B, and C, if AΔB = AΔC then B⊆C. Q: Is S true? prove ...
*Tuesday, July 29, 2014 at 4:48pm*

**math**

Sue left her home at 6 A.M. driving her car at the rate of 50 miles per hour. At 8 A.M. her brother Kevin drove after her along the same highway, traveling at the rate of 60 miles per hour, in how many hours did Kevin pass Sue.
*Tuesday, July 29, 2014 at 1:56pm*

**bussiness math lit and tourism**

What university and job can I get
*Tuesday, July 29, 2014 at 11:38am*

**math**

Show that 4/2^x = 2^2-x and hence or otherwise solve for x in the equation 2^x +2^x-2 =5
*Tuesday, July 29, 2014 at 11:04am*

**math**

what are the factors of x^2-6x+12?
*Tuesday, July 29, 2014 at 10:22am*

**math**

27 root 3 =3^b. Find the value of b.
*Tuesday, July 29, 2014 at 9:45am*

**Math**

Let R be the statement : for all sets A, B and C, if A⊆B∪C and B ⊆C∪A then AΔB = C. Q: Is R true for all sets A, B and C? Prove answer Let S be the statement: for all sets A, B, and C, if AΔB = AΔC then B⊆C. Q: Is S true? prove ...
*Tuesday, July 29, 2014 at 5:00am*

**Finite Math**

suppose x sheets from a 500 sheet ream of paper have been used. Write an algebric expression to represent the number of sheets that are left
*Tuesday, July 29, 2014 at 1:48am*

**trigonmetry -math**

cos2acos2b + sqr(sin(a-b)) - sqr(sin(a+b)) = ?
*Tuesday, July 29, 2014 at 1:09am*

**Math**

Walter is making an open-top box. The length is 6 inches greater than the width, and the height is 2 inches. The area of the rectangular sheet of material that will be folded to make the box is 280 square inches. What is the length of the box in inches? (I really don't ...
*Monday, July 28, 2014 at 11:56pm*

**Math (Discrete Math)**

Let R be the statement : for all sets A, B and C, if A⊆B∪C and B ⊆C∪A then AΔB = C. Q: Is R true for all sets A, B and C? Prove answer Let S be the statement: for all sets A, B, and C, if AΔB = AΔC then B⊆C. Q: Is S true? prove ...
*Monday, July 28, 2014 at 10:12pm*

**Math**

How do I graph a slope of 2/3 passing through the point of (-3,-4). Please help. I was given this answer, but I am unsure if it is correct **Since the slope is 2/3, go right up 3 and up 2 and plot another point.
*Monday, July 28, 2014 at 10:03pm*

**Math**

How do I write an equation for (-3,-8) that has a slope of -2? So far this is what I came up with. y=mx+b m=-2 y=-2x+b -8=-2x-3
*Monday, July 28, 2014 at 9:35pm*

**Math**

Find the slope of 8x+4y=7 in parallel and perpendicular lines. Please help me figure this out? Still need help
*Monday, July 28, 2014 at 9:26pm*

**Math**

Lynn was shopping and found a purse that was marked with a discount of "1/3" off. If the original cost of the purse was $80, how much will Lynn pay?
*Monday, July 28, 2014 at 9:25pm*

**math**

please factor the ff: 1.x^2+16x-36 2.x^4-10x^2+9 3.(4+x)^2-(4+x)-20 4.2-3x^-1+x^-2 (all of the exponent here in number four is negative) thanks.....
*Monday, July 28, 2014 at 9:18pm*

**Math**

Find the slope of 8x+4y=7 in parallel and perpendicular lines. Please help me figure this out?
*Monday, July 28, 2014 at 9:07pm*

**math**

Benadryl is on sell this week for 20% off of the normal selling price at $10.00 per unit. If the pharmacy purchased Benadryl at $8.00 per unit, what is the gross profit percentage?
*Monday, July 28, 2014 at 8:48pm*

**Math**

How do I find the slope of the line in simple form? 4x+5y=3
*Monday, July 28, 2014 at 8:41pm*

**math**

5. There are x dictionaries in a bookstore. After 1/8 of them were purchased, 10 more dictionaries were shipped in bringing the total number of dictionaries to 52. What is the value of x?
*Monday, July 28, 2014 at 8:24pm*

**math**

If n>0, then (4^n)(8^n)= A.2^9n B.2^8n C.2^6n D.2^5n E.2^4n
*Monday, July 28, 2014 at 8:23pm*

**math**

Jim can fill a pool carrying buckets of water in 30 minutes. Sue can do the same job in 45 minutes. Tony can do the same job in 1.5 hours. How quickly can all three fill the pool together? A.12 minutes B.15 minutes C.21 minutes D.23 minutes E.28 minutes I got 53 minutes, but ...
*Monday, July 28, 2014 at 8:20pm*

**math**

6. In a residential building, the ratio of man and woman is 5 to 8. In August, there are 30 men and 10 women moving out from the building. After that, the ratio of man and woman in this building is 1 to 2. How many men were there in the building before August 1? please show work.
*Monday, July 28, 2014 at 8:18pm*

**math**

If 12V=3W, and v(not equal)=0, then which of the following is equivalent to 2W-8V? A.0 B.4W C.-6W D.2V E.-2V please show work.
*Monday, July 28, 2014 at 8:14pm*

**math**

How many three-dight integers greater than 600 contain only odd digits?
*Monday, July 28, 2014 at 8:11pm*

**math**

2. James spends 10% of his money for movie; he also spends 20% of his money for his lunch. Then he buys $20 in his office supplies. In the next day, he spends $10 for his breakfast. Now he leaves 40% of his original money. How much does he save originally? please show work.
*Monday, July 28, 2014 at 8:10pm*

**math**

Mrs. Richmond bought some apples and pears in the ratio 3:5. After she gave away 3/5 of the apples and 40 pears, the ratio of apples to pears became 2:5. An apple costs 30 cents. A pear costs 15 cents more than an apple. How much did Mrs. Richmond pay for the fruit?
*Monday, July 28, 2014 at 7:10pm*

**math**

The square of a certain whole number N is N squared. If 60 is a factor of N squared, its possible that __ is not a factor of N squared.
*Monday, July 28, 2014 at 7:08pm*

**math**

Carl weighted 180 pounds after two months he lost 9 pounds what percent of his weight did he lose
*Monday, July 28, 2014 at 6:44pm*

**Math**

I wanted to see if I was solving this problem correctly. A line passes through the point (-3,-8)and has a slope of -2.Write an equation for this line. y=mx+b m=-2 y=-2x+b -8=-2(-3)+b
*Monday, July 28, 2014 at 4:55pm*

**Math**

How do I graph a slope of 2/3 passing through the point of (-3,-4). Please help
*Monday, July 28, 2014 at 4:18pm*

**math/help**

a)4 1/6 divided 1 1/6 b)4 2/9 + 3 3/1
*Monday, July 28, 2014 at 3:08pm*

**math**

A 5 kg bag of apple costs R65. What is the cost of 500 grams of apples
*Monday, July 28, 2014 at 2:28pm*

**math**

Find dy/dx and d2y/dx2. x = et, y = te−t
*Monday, July 28, 2014 at 2:05pm*

**general math 1**

1. Find the product of 487.9573 and 1,000.
*Monday, July 28, 2014 at 10:37am*

**general math**

2. Solve this equation: 5x − 2 = 2x + 7
*Monday, July 28, 2014 at 9:44am*

**math**

The game involves tossing a penny and a dime along with rolling a die. to win the penny land heads up, the dime land tails up and roll a 6 on the die. what is the probability that he will win on the first play
*Monday, July 28, 2014 at 12:08am*

**Math**

Kevin and Rob are standing on opposite sides of Edmonton's River Valley. In order to see a boat on the river, Kevin has to look down 32°, and Rob has to look down 38°. The width of the valley is 750m, and the boat is exactly between Kevin and Rob. How much higher ...
*Sunday, July 27, 2014 at 9:19pm*

**math**

8 < 5 + y
*Sunday, July 27, 2014 at 8:13pm*

**math**

The charge for renting a rowboat on Loon Lake is D dollars per hour plus c cents for each minute into the next hour. How many dollars will Mr.Wilson pay if he used a boat from 3:40 P.M. to 6:20 P.M.
*Sunday, July 27, 2014 at 8:11pm*

**math**

A certain test is worth 145 points. How man points are needed to obtain a score of $65%?
*Sunday, July 27, 2014 at 7:55pm*

**math**

A rowing team rowed an average of 17.2 miles per hour with the current and 10.4 miles per hour against the current. Determine the team's rowing speed in still water and the speed of the current I need help fast. anyone?
*Sunday, July 27, 2014 at 5:09pm*

**Math**

How would I find the solution set for a system of linear inequalities? For example, x-3y<10 3x-2y≥5
*Sunday, July 27, 2014 at 5:00pm*

**Math**

How do I find the points, so that O can graph it. y=1/4x+4
*Sunday, July 27, 2014 at 3:42pm*

**math**

A box contains 4 red cards, 6 blue cards, and 10 green cards. What is the smallest number of cards we must remove from the box to make sure that we have 2 cards of the same color?
*Sunday, July 27, 2014 at 2:07pm*

**Math**

Sita needs a perfect score of 100 for math test in this year so as to improve on her average score from 84 to 86. How many maths tests were there altogether in this year?
*Sunday, July 27, 2014 at 10:44am*

**math**

The average mass of a group of children is 36kg. If 3/7 of the no. of children are girls and their average mass is 32 kg, find the average mass of the boys.
*Sunday, July 27, 2014 at 10:41am*

**math**

1. The salaries of A B and C are in the ratio of 2;3:5 the salary of B and C together is RS8000. % of the salary of C more than that of A by--
*Sunday, July 27, 2014 at 8:39am*

**math**

which of the ff. coordinates of points belong to the solution set of the inequality y<3x^2+3x-6? a)(-1,2) b)(1,-2) c)(-2,7) d)(-1,1)
*Sunday, July 27, 2014 at 2:46am*

**math**

which of the following mathematical statements is a quadratic inequality?a)5t^2-r-20=0 b)9h+18<0 c)4x^2+2x-2>=0 d)m^2+9m+16=0
*Sunday, July 27, 2014 at 2:43am*

**math**

The length of rectangle is 120% that of the breadth. The perimeter is 88m. Find the area of the rectangle?
*Sunday, July 27, 2014 at 1:19am*

** math**

the table below shows some values for the function f. if f is a linear function, what is the value of a+b? table: X | f(x) 0 | a 1 | 12 2 | b
*Saturday, July 26, 2014 at 9:45pm*

**Math**

What is 5/11 minus 7/11
*Saturday, July 26, 2014 at 9:03pm*

**math**

If I have a peice of carpet that is 9 ft by 8 ft and the cost is .59 per square ft how much does it cost for the carpet?
*Saturday, July 26, 2014 at 5:43pm*

**math**

Mr. Brown sold a jacket for $240, this making a profit of 20% on his cost. Later, he sold another jacket for $240 this time suffering a loss of 20% on his cost. The result of the two sales was A.He gained $40.00 B.He gained $10.00 C.He lost $20.00 D.He lost $10.00 E.He gained...
*Saturday, July 26, 2014 at 3:04pm*

**math**

x = t − 2 sin t, y = 1 − 2 cos t, 0 ≤ t ≤ 6π Set up an integral that represents the length of the curve.
*Saturday, July 26, 2014 at 2:34pm*

**Math - trig**

Determine the general solution of 8 cos^2x - 4cosx - 1 =0 (8cos^2x - 4cosx)/8 =1/8 cos^2x - 4cosx=1/8 cos^2x/cosx =1+4cosx/cosx cosx = 5 x = cos^-1(5) x = error
*Saturday, July 26, 2014 at 12:28pm*

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