Thursday

October 2, 2014

October 2, 2014

**Branches of Math**

**Recent Math Questions**

Post a New Question | Current Questions

**math**

completing the square of x^2-3x-8=0
*Tuesday, August 19, 2014 at 7:23am*

**math**

. A factory employing a large number of workers finds that over a period of time , the average absentees rate is three workers per shift. Calculate the probability that in a given shift (i)exactly two workers will be absent , (ii)more than four workers will be absent .
*Tuesday, August 19, 2014 at 6:56am*

**Math**

Why is life like a shower
*Tuesday, August 19, 2014 at 12:47am*

**Math**

Does 5 round up or down?
*Tuesday, August 19, 2014 at 12:11am*

**4th grade math**

If jill climbed 100 feet more, how many feet above sea level would she be?
*Monday, August 18, 2014 at 11:23pm*

**Math**

A class us planning a party. A pizza restaurant cuts each pizza into 8 slices. There are 32 students. How many pizzas does the class need to order for each student to have a slice? Explain
*Monday, August 18, 2014 at 10:17pm*

**Teaching in Early childhood progras **

Self appraisals should not be used to assess which of the following? A. Math concepts B. Dispositions regarding tasks C. IEP adherence D. Literacy my answer is c.
*Monday, August 18, 2014 at 9:18pm*

**Math**

If a plane flies due north for 70km, then due west for 145km, what would the compass bearing be for the plane from its starting point? Please email me once you have the result at jodie.jebb@moc.sa.edu.au
*Monday, August 18, 2014 at 8:53pm*

**math**

A plane flies 90km on a bearing 030 degree and then flies 150km due east. How far east of the starting point is the plane?
*Monday, August 18, 2014 at 8:48pm*

**math**

the distance between DELHI TO Meerut is 75km two trains speed of 100km/h & 80 km/h leave the two station at 8am towards each other at what time will they pass each other
*Monday, August 18, 2014 at 8:36pm*

**Math**

I wounder what is 5(29)? I just really don't under stand how to solve it.
*Monday, August 18, 2014 at 7:48pm*

**math**

49. How many integers between 70 and 105 have a reminder of 2 when divided by 15?
*Monday, August 18, 2014 at 7:11pm*

**math**

59. The scale on a map is 1 inch= x miles. What is the distance, in inches, on the map between two cities that are m miles apart?
*Monday, August 18, 2014 at 7:07pm*

**math**

If an item that sells for $81.00 has a 50.0% markup on cost, what is the cost?
*Monday, August 18, 2014 at 6:44pm*

**MAth**

when working with numbers (negative and positive)inside absolute value bars are they considered positive and bars removed?
*Monday, August 18, 2014 at 5:52pm*

**MAth**

absolute value problems |30|/|10| + |-2+7|/5 x 8 = 17.4 is this answer correct?
*Monday, August 18, 2014 at 5:32pm*

**math **

which numbers should you add to estimate the answer to this problem: 87,087 + 98.000 - 88,000+ 98,000 -85,000+95,000 - 87,000 +98,000 - 80,000+ 90,000 thanks for your help!
*Monday, August 18, 2014 at 5:03pm*

**math **

thanks damon! u rock! another quick question....how do you estimate the total precipitation in inches and the total number of days with precipitation asheville and wichita asheville= 47.71 inches 124 days wichita = 28.61 inches 85 days
*Monday, August 18, 2014 at 4:42pm*

**math**

estimate the total weight of two boxes that weigh 9.4lb and 62.6 lb using rounding and compatible numbers. Which estimate is closer to the actual total weight? why? thanks!
*Monday, August 18, 2014 at 4:26pm*

**math**

The length of a rectangle is 7 m less than triple the width. If w represents the width, write an expression for the length The length of a rectangle is 7 m less than triple the width. If w represents the width, write an expression for the length, l.
*Monday, August 18, 2014 at 12:50pm*

**math**

The length of a rectangle is 7 m less than triple the width. If w represents the width, write an expression for the length
*Monday, August 18, 2014 at 12:44pm*

**Math**

Which shows the product of a number n and 12? A.n-12 B.n/12 C.12n D.n+12 Is the answer D?
*Monday, August 18, 2014 at 12:31pm*

**math**

Eric received 76 tokens to use in the arcade at the pizza restaurant. Which of the following inequalities represents the number of tokens Eric used in the arcade? x < 76 x < 76 x > 76 x > 76
*Monday, August 18, 2014 at 11:02am*

**math**

Starting from today, every month you save $500 into a bank account with earns interest at an annual rate of 4%. How much money do you have in the account at the end of 4 years?
*Monday, August 18, 2014 at 9:50am*

**Math**

a person sol 100 shares of stock at a profit of 15%. if the selling price for the 100 shares was 2300. what was paid for the stock?
*Sunday, August 17, 2014 at 11:51pm*

**Math**

A person stock worth 2300 at 100 shares and they had a 15 % profit how much was the stock
*Sunday, August 17, 2014 at 11:47pm*

**math**

a bag contains 400 coins ,and 33 1/2 % are nickels, how many nickels are there?what percent of the coins are not nickels
*Sunday, August 17, 2014 at 10:40pm*

**math**

The leng of the smaller rectangle is 1 inch less than twice its wide. both the dimensions of the larger rectangle are 2 inches longer than the smaller rectangle. the area of the shaded region is 86 square inches. what is the area of the smaller rectangle?
*Sunday, August 17, 2014 at 9:33pm*

**Math**

Assign variables for the following problem (you do not need to solve the problem) Thirty fluffaluff trees are introduced on an island at the start of year zero. At the start of thirty there are 55 fluffaluff trees. Use the fluffaluff formula to find how many fluffaluff trees ...
*Sunday, August 17, 2014 at 9:25pm*

**Math**

You ride your bike at an average speed of 8 miles per hour.how many miles can you travel in 1.5 hours?
*Sunday, August 17, 2014 at 8:54pm*

**important math question**

the equation x^3 -x-5=0 has one solution for x between -2 and 2. what is the solution? how do I get this
*Sunday, August 17, 2014 at 2:37pm*

**math**

evaluate the limit as x approaches 0 from the right. of the function xcos(1/x) I know the answer is O but I am not sure as of my reasoning. I just that that since cos(1/x) is being multiplied by a number approching 0 that the whole limit would be o.
*Sunday, August 17, 2014 at 2:17pm*

**math**

a computer is being lowered into the ocean from a platform. at this moment it is 210 feet below surface and being lowered 150 feet every 30 minutes. how to write this in the form of an expression?
*Sunday, August 17, 2014 at 12:13pm*

**math**

The length of a rectangle of perimeter 64 cm is 5/3 of its breadth . Find the area of rectangle ?
*Sunday, August 17, 2014 at 11:19am*

**math**

A swimmer S is in the sea at a distance of 4km from the closest point A on a straight shore.His house B is on the shore at a distance 5km from A.He can swim at a speed of 3km/hr.The distance of the point on the shore from B so that he reaches his home in the minimum time is=?
*Sunday, August 17, 2014 at 10:27am*

**math**

SIN(90*-0)COT(90*-0)/SIN0+COS(90-0)=1/2
*Sunday, August 17, 2014 at 8:04am*

**Math**

1. The length of a rectangle is 6 inches longer than thrice its width. The area of the rectangle is 57 square inches. Write a quadratic equation for the area of the floor in terms of x. Find the length and width of the rectangle. 2. If 1,500 ft of fencing is available to build...
*Sunday, August 17, 2014 at 7:27am*

**Math**

1. A man has 22 feet by 26 feet rectangular lot that he will use for planting. He wants to build a brick of walkway of uniform width on the border of the lot. If the man wants to have 396 square feet of ground left for planting, how wide should he build the walkway? 2. Based ...
*Sunday, August 17, 2014 at 7:19am*

**Math**

How long can I wait to see the answer of my question about Algebra ? Its been a long hour .
*Sunday, August 17, 2014 at 6:41am*

**math**

Find the equation of the circle for which the points (1,2),(4,6) are the end points of a diameter.
*Sunday, August 17, 2014 at 6:31am*

**MAth**

If a worker wants to pack 200 newly harvested mangoes at average size of 3"x2" in delivery boxes .To optimize the cost and profit in packaging , the mangoes must be properly packed in boxes of similar sizes. To systemize counting , there must also be equal ...
*Sunday, August 17, 2014 at 1:42am*

**Math**

If a worker wants to pack 200 newly harvested mangoes at average size of 3"x2" in delivery boxes .To optimize the cost and profit in packaging , the mangoes must be properly packed in boxes of similar sizes. To systemize counting , there must also be equal ...
*Sunday, August 17, 2014 at 1:30am*

**Math**

Sorry! I don't get this one either.. limit of (f(x+Δx)-f(x)) / Δ x with Δ x -> 0 f(x)= 1/(x+3) My work so far before I got stuck... 1/((x+Δx)+3) = 1/(x+Δx+3) - 1/x+3 = 1(x+3)/(x+Δx+3)(x+3) - 1(x+Δx+3)/(x+3)(x+Δx+3) =Δx / (x...
*Saturday, August 16, 2014 at 9:20pm*

**Math**

Use graphing utility to graph function and estimate the limit. Use a table to reinforce your conclusion. Then find the limit by analytic methods. lim (sq root of (x+2) - sq root of 2) / x x->0 Thanks!
*Saturday, August 16, 2014 at 8:21pm*

**Math**

Hi! How would you find the limit? limit of (f(x+Δx)-f(x)) / Δ x with Δ x -> 0 f(x)= 3x-2
*Saturday, August 16, 2014 at 8:17pm*

**math**

Place parentheses in the following equation to make it true. 6 + 6 ÷ 6 x 6 - 6 = 0
*Saturday, August 16, 2014 at 6:48pm*

**math**

2 times{(300-90 divided by 5)-[3 times 26-(8-2 times 3
*Saturday, August 16, 2014 at 6:02pm*

**Math**

For a given right, side a = 76.4 feet and side b = 39.3, what is the measure of angle b to the nearest degree
*Saturday, August 16, 2014 at 3:50pm*

**Math**

If I borrow $26,400 @ 7% interest and make payments of $300 how much will I have left owing after 19 months.
*Saturday, August 16, 2014 at 12:44pm*

** contemporary math**

suppose that the length of one leg of a right triangle is 2 inches less than the length of the other leg.the length of hypotenuse is 10 inches.find the length of each leg.
*Saturday, August 16, 2014 at 12:15pm*

**Math**

Cindy is four years older than twice Mark's age. Juan is half as old as Cindy. How much years older than Juan is Mark?
*Saturday, August 16, 2014 at 10:32am*

**math**

The length of a rectangle is 7 cm longer than its width. If the perimeter of the rectangle is 74cm, find the length and the area of the rectangle.
*Saturday, August 16, 2014 at 7:31am*

**Math**

Count ostriches and llamas. Someone counted 47 heads and 122 legs. How many of each animals is on the farm.
*Friday, August 15, 2014 at 5:53pm*

**math**

x,y,z>0 and 1/(1+x)+1/(1+y)+1/(1+z)=2. prove that xyz<=1/8
*Friday, August 15, 2014 at 1:49pm*

**math**

x,y,z>0 and 1/(1+x)+1/(1+y)+1/(1+z)=2. prove that xyz<=1/8
*Friday, August 15, 2014 at 1:33pm*

** math**

A jar contains four blues marbles and two green marbles. Without looking, two marbles are drawn from the jar. What is the probability that two marbles with the same color will be selected?
*Friday, August 15, 2014 at 12:23pm*

**math i need help 3 questions**

1. The numerator and denominator of a fraction are in the ratio of 3 to 4. If 4 is added to the numerator and subtracted from the denominator, the value of the resulting fraction is 4/3. The numerator of the original fraction is A. 12 B. C. 3 D. 4 2. If it takes b hours to ...
*Friday, August 15, 2014 at 11:06am*

**math**

The volume of cube I is 331 m^3 less than the volume of cube II. If an edge of cube I is 10 meters, an edge of cube II is A. 14 meters B. 13 meters C. 12 meters D. 11 meters
*Friday, August 15, 2014 at 9:40am*

**Math**

A wheel with a diameter of 2 meters rolls on the street for 100 meters. Most nearly, the wheel made how many complete revolutions? A. 64 B. 32 C. 16 D. 8
*Friday, August 15, 2014 at 9:35am*

**math**

If b books cost d dollars, then d books cost A. b dollars B. bd dollars C. d^2/b D. b^2/d These are the worst questions. Its a SHSAT question
*Friday, August 15, 2014 at 9:34am*

**math**

If B is the midpoint of AC, and C is the midpoint of BD, then what percent of CD is AC? A. 25% B. 50% C. 100% D. 200% HELP Is it A, 25%?
*Friday, August 15, 2014 at 9:23am*

**math**

If ab=x+3,bc=2x and ac=4x-5.then for which value of x,b lies on ac?
*Friday, August 15, 2014 at 9:15am*

**math**

If the circumference of a circle of radius r inches is equal to the perimeter of square with a side length of s inches, r/s= A. 4/π B. 2/π C. √2/π D. √2/π E. 1/2π I need help.
*Friday, August 15, 2014 at 9:01am*

**math **

If a bicycle wheel has traveled f/π feet after n complete revolutions, what is the length in feet of the diameter of the bicycle wheel? A. f/nπ^2 B. π^2/fn C. nf/π^2 D. nf/π^2 E. f/n
*Friday, August 15, 2014 at 8:57am*

**math**

Al is twice as old as Bill, who is twice as old as Carl. In 10 years, Al will be twice as old as Carl. How old is Al now? A. 40 B. 20 C. 10 D. 5
*Friday, August 15, 2014 at 8:52am*

**math**

When the perimeter of an equilateral triangle is doubled, the result is 24. The length of a side of the original triangle is A. 4 B. 6 C. 8 D. 12
*Friday, August 15, 2014 at 8:43am*

**math**

solve trinomial x^2-3x+4
*Friday, August 15, 2014 at 12:27am*

**Math**

Which inequality is correct? A. ^11 <^22 < 11 B. 11 < ^11 < ^22 C. ^11 < 11 < ^22 D. ^22 < ^11 < 11 My answer is c is that correct
*Thursday, August 14, 2014 at 10:43pm*

**math**

A group of 21 people went to the country fair with 9 people on a stagecoach and 3 people in each buggy. On the return trip, 4 people rode in each buggy. How many people returned on the stagecoach?
*Thursday, August 14, 2014 at 9:18pm*

**Math**

In the number 7,725, which places contain digits where one digit is ten times as great as the other?
*Thursday, August 14, 2014 at 9:10pm*

**math**

Why is it better to NOT use a letter that stands for the " unit name" such as s and t that stand for students and teachers as a variable?
*Thursday, August 14, 2014 at 8:16pm*

**Math**

Tommy has taken a job in which he earns $1 on the first day of the month, $2 on the second day, $3 on the third, and so on. How much money will he earn in the month of October?
*Thursday, August 14, 2014 at 7:55pm*

**Math**

In a parking lot there are motorcycles and cars. There are 48 motors and 136 tires. How many motorcycles and how many cars are in the parking lot?
*Thursday, August 14, 2014 at 7:54pm*

**math**

14. According to the Texas Parks and wildlife Department, there are about 40 white-tailed deer per square mile in each of 35 Texas counties. A rectangular area on a ranch in one of these countries measures 2.25 miles by 6.7 miles. Which of the following is closest to the ...
*Thursday, August 14, 2014 at 7:14pm*

**math**

19. Which statement describes the relationship between the line graphs of the equations below? y=-2x+4 y=0.5x+4 A.The line graph are the same line. B.The line graph are parallel lines. C.The line graph are perpendicular lines. D.The line graphs intersect, but are not ...
*Thursday, August 14, 2014 at 5:15pm*

**math corrections**

16. Carlos sells video games on Web site. The cost for his web site is $75 per year. Carlos sells each video game for $25. What inequality can Carlos use to determine g, the number of video games he must sell to make a profit of at least $50 per year? A.100g less than and ...
*Thursday, August 14, 2014 at 5:08pm*

**math**

Shawnee is putting $3,500 into an account earning 4.85% interest compounded quarterly. She estimates that it will take just over 11 years for this investment to grow to $6,000. Which of the following is a true statement?
*Thursday, August 14, 2014 at 5:04pm*

**math corrections**

14. According to the Texas Parks and wildlife Department, there are about 40 white-tailed deer per square mile in each of 35 Texas counties. A rectangular area on a ranch in one of these countries measures 2.25 miles by 6.7 miles. Which of the following is closest to the ...
*Thursday, August 14, 2014 at 4:54pm*

**math corrections**

10. You have a nickel, a dime, a quarter and a fifty-cent piece. A clerk shows your several articles, each different price and any one of which you could purchase with your coins without receiving change. What is the largest number of articles he could have shown you? A.8 B.10...
*Thursday, August 14, 2014 at 4:43pm*

**math corrections**

9. A rectangular field 50 meters in width and 120 meters in length is divided into two fields by a diagonal line. Find the length of fence in meters required to enclose one of these fields? A.130 B.170 C.180 D.200 E.300 Choice A is wrong.
*Thursday, August 14, 2014 at 4:39pm*

**math**

What is the fewest number of 7's that can be added together to make their sum greater than 4000? A. 4001 B. 572 C. 571 D. 470
*Thursday, August 14, 2014 at 2:17pm*

**math**

an actor invests money at 7% and 29000 more than three times the amount at 11% the total annual interest earned from the investments is 23990 how much did he invest at each amount.
*Thursday, August 14, 2014 at 2:09pm*

**math**

A ship sails due north from a position 5 degrees, 28' South Latitude to position 6 degrees, 43' North Latitude. Given that one minute of latitude is equivalent to 1 nautical mile, the ship has sailed a distance of A. 75 nautical miles B. 371 nautical miles C. 731 ...
*Thursday, August 14, 2014 at 1:26pm*

**math**

If a ball is thrown directly upward with a velocity of 14 m/s, its height (in meters) after t seconds is given by y = 14t − 4.9t2. What is the maximum height attained by the ball? (Round to two decimal places.) ______ m After how many seconds is that height attained? (...
*Thursday, August 14, 2014 at 12:06pm*

**math**

If $15,000 is invested at an interest rate of 10% per year, compounded monthly, find the value of the investment after the given number of years. (Round your answers to the nearest cent.) a. 6 years b. 12 years c. 18 years
*Thursday, August 14, 2014 at 11:39am*

**math**

A square picture frame has an outer perimeter of 28 and an inner perimeter of 20. What is the shortest distance between any two vertices? A. 5 B. √2 C. 2√2 D. 7 E. 7√2
*Thursday, August 14, 2014 at 11:34am*

**math**

If the lengths of two sides of a triangle are 12 and 15, which of the following must be true of p, the perimeter of the triangle? A. 3<p<27 B. 12<p<42 C. 12<p<54 D. 30<p<54 E. 3<p<54 I honestly don't know what this question is doing in my ...
*Thursday, August 14, 2014 at 11:27am*

**math**

The length of a rectangular landing strip exceeds its width by 3,700 feet. If its perimeter is 17,400 feet, what is the length, in feet, of the airfield? A. 2500 B. 5000 C. 6200 D. 10000 E. 13700
*Thursday, August 14, 2014 at 11:23am*

**Math **

How did 2400x-2x^2 became dA/dx= 2400-4x?
*Thursday, August 14, 2014 at 10:25am*

**math**

If each edge of a cube is increased by 2 inches, the A. volume is increased by 8 cubic inches B. area of each face is increased by 4 square inches D. sum of the edges is increased by 24 inches
*Thursday, August 14, 2014 at 10:12am*

**math**

A square has the same area as a rectangle whose longer side is 2 times the length of its shorter side. If the perimeter of the rectangle is 24, what is the perimeter of the square? I have no idea how to do it. I need help.
*Thursday, August 14, 2014 at 9:38am*

**math**

If one side is 4.2cm and difference in lengths of hypotenuse and other is 14cm find area
*Thursday, August 14, 2014 at 9:34am*

**math**

What is regular pentagon
*Thursday, August 14, 2014 at 9:31am*

**math**

The perimeter of a rectangle with adjacent side lengths of x and y, where x>y, is 8 times as great as the shorter side of the rectangle. What is the ratio of y to x? A. 1:2 B. 1:3 C. 1:4 D. 2:3 E. 3:4
*Thursday, August 14, 2014 at 9:28am*

**Math**

A piece of wire of 14 meters long is cute into 2 pieces. One piece is bent into the shape of an equilateral triangle and the other into the shape of a circle. How should be the wire be cut so that the combined area of 2 figures is as small as possible?
*Thursday, August 14, 2014 at 9:24am*

**Math**

from a lockout tower 25 meters high, a man observes from a position 1.70 meters below the top of the tower that the angle of elevation of the top of a nearby building is 12 degrees 40 minutes and the angle of depression of its base is 70 degrees 20 minutes. If the base of the ...
*Thursday, August 14, 2014 at 8:43am*

**Math**

A piece of wire 12 m long is cut into 2 pieces. One piece is bent into the shape of an equilateral triangle and the other into a shape of a circle. How should the wire be cut so that the combined area of the two figures is as small as possible?
*Thursday, August 14, 2014 at 8:39am*

**math**

an actor invest some money at 9%, and 26000 more that three time the amount at 10% the total annual interest earned from the investment is 27560 how much did he invest at each amount
*Thursday, August 14, 2014 at 2:02am*

**Math: Equivalence Classes**

Let R be the relation on ℤ+×ℤ+ defined by (a,b)R(c,d) if and only if a−2d=c−2b. 1. Find an equivalence class that has exactly 271 elements. 2. Is it true that for every positive integer n, there is an equivalence class that contains exactly n ...
*Thursday, August 14, 2014 at 12:19am*

**Math**

What is 100x=
*Wednesday, August 13, 2014 at 10:51pm*

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