Friday

November 28, 2014

November 28, 2014

**Branches of Math**

**Recent Math Questions**

Post a New Question | Current Questions

**math measurement**

Jane has two pieces of ribbon.One piece is 10cm longer than the other.the total of the two pieces is 40cm.how long is the shorter piece?
*Sunday, October 26, 2014 at 8:56pm*

**help PLEASE math 112**

Which has the greater effect on the surface area of a right circular cylinder - doubling the radius or doubling the height? how can I explain this
*Sunday, October 26, 2014 at 8:43pm*

**math**

frank is 3 times old as ken. frank is 15 years older than eileen, while ken is 1 year younger than eileen. What are thw ages of frank, ken and eileen?
*Sunday, October 26, 2014 at 8:11pm*

**math**

P varies directly as the square root of q. P=8 when q =25 find p when q = 100
*Sunday, October 26, 2014 at 7:39pm*

**Math**

Liz uses 19 connecting cubes to make a model of house. The house model is in the shape of a rectangle and is one cube high. How many different ways could Liz make the model of the house?
*Sunday, October 26, 2014 at 7:03pm*

**math**

your recipe calls for 300 grams of chocolate .you have 200 grams .what fraction of chocolate do you have?
*Sunday, October 26, 2014 at 6:47pm*

**Math**

10. Estimate 30% of the student population. You must show all of your work and provide an explanation. *There are 850 students.
*Sunday, October 26, 2014 at 6:07pm*

**math problem**

Adam, Sam, and Eddie have to meet their boss at 3:00 in the office 9 miles apart from their home, and they must be arrive in time for the appointment. Adam had a bicycle, Sam had a skateboard,and Harry had no transport. So they have to share. so they left the house together. ...
*Sunday, October 26, 2014 at 3:33pm*

**math**

all the seats in two sections of a movie theater are occupied. in one section there are 8 row with 18 seats in each row.
*Sunday, October 26, 2014 at 2:58pm*

**Math**

Can someone please check these problems? Thank you! Solve each equation for the indicated value. 1. a-b=-c, for a I got a=-c+b 2. 4y+6x=12, for y I got y=-3/2x+3
*Sunday, October 26, 2014 at 2:53pm*

**Math**

Find the exact interest on a loan of $32,400 at 7% annually for 30 days.
*Sunday, October 26, 2014 at 2:08pm*

**math**

Ashley recently opened a store which sells only natural ingredients. She wants to advertise her products by distributing bags of samples in her neighborhood. It takes one person 2 minutes to prepare one bag. How many hours will it take to prepare 900 bags of samples if Ashley ...
*Sunday, October 26, 2014 at 1:18pm*

**Algebra 1**

Andrew is making a plan to complete a class math assignment. He has 48 problems to complete over 5 days. He decides to complete the assignment is such a way that his total number of completed problems doubles every day. He realizes that that number must be 48 by the end of ...
*Sunday, October 26, 2014 at 1:07pm*

**math**

KATHY has red balloons and blue balloons. She gives away 5 ballons. If she gives away 3 red ballons, how many blue ballons does she give away?
*Sunday, October 26, 2014 at 12:10pm*

**Math**

Assume a three-month CD purchased for $3000 pays simple interest at an annual rate of 10%. What is the balance at maturity? I don't have any work. This is question one and I have 19 more. I don't understand how to arrive at the answer.
*Sunday, October 26, 2014 at 10:31am*

**Math algebra**

its 45m from the center of a circular field to the inside edge of the track surrounding it. the distance from the center of the field to the outside edge is 55m. find the circumference of each edge.
*Sunday, October 26, 2014 at 10:00am*

**math**

the width of a rectangle is 4cm and the length is 8 cm if both the width and the length are increased by equal measures, the area of the rectangle is increased by 64 cm 2. find the length and width of the larger rectangle
*Sunday, October 26, 2014 at 9:16am*

**5th grade math problem**

Adam, Sam, and Eddie have to meet their boss at 3:00 in the office 9 miles apart from their home, and they must be arrive in time for the appointment. Adam had a bicycle, Sam had a skateboard,and Harry had no transport. So they have to share. so they left the house together. ...
*Sunday, October 26, 2014 at 1:13am*

**Math (sigma stuff!)**

Hi! Looking to find n∑k=1 8(k/n) (n is supposed to be on top, k=1 below the sigma sign)in closed form. I've tried doing 8*[(n(n+1)/2)/n], and that didn't seem to work. I'm not sure if I'm supposed to do anything with the n or if it might be an issue with ...
*Saturday, October 25, 2014 at 11:11pm*

**Math**

The data shows the total number of employee medical leave days taken for on-the-job accidents in the first six months of the year: 16, 7, 23, 9, 25, 16. Find the standard deviation.
*Saturday, October 25, 2014 at 9:42pm*

**math**

8x-1=55
*Saturday, October 25, 2014 at 9:21pm*

**math/limits**

lim {x-3}/(x^2-9) x->3 ( I used {} to show absolute value) Find the limit if there is one.
*Saturday, October 25, 2014 at 8:23pm*

**math/limits**

lim (squar(14+y)-squar(14))/y y->0 Find limit if there is one.
*Saturday, October 25, 2014 at 8:21pm*

**Math**

Im still confused on how to solve these equations for the indicated value. 1. a-b=-c, for a 2. y=1/2x-10, for x
*Saturday, October 25, 2014 at 8:14pm*

**math**

can you help me graph the inequality f> equal to 4 on a number line ? ms.sue please help
*Saturday, October 25, 2014 at 8:04pm*

**math**

ms.sue help asap 1. which exponent makes the statement true? 1/5^9 =5^? 9 -9 1/9 -1/9 2. y^5*y^14 = 2y^19 y^60 y^19 2y^60 3. w^12/w^18 w^30 w^-30 w^6 w^-6 4. using the numbers 3,2, and 4 which of these problems would have a solution of 4? 4*2^3/2^3 2*2^3/2^4 3*2^3/2^4 3*2^4/2^...
*Saturday, October 25, 2014 at 7:53pm*

**math/probability**

If u pick one card from each of 5different decks,what is the probability that you will pick at least one spade
*Saturday, October 25, 2014 at 7:14pm*

**math/probability**

The probability of car accident is 1in 50 in a year,what is probability in a car accident over a 5year period
*Saturday, October 25, 2014 at 7:10pm*

**math**

2. sylvia has 6 1/2 boxes of chocolate to share at a family picnic. if she gives each person 1/3 of a box, how many people can recieve chocolate? 13 17 19 21 3.which of these numbers is not rational? square root 3 0.25 1/5 square root 9 someone please help asap
*Saturday, October 25, 2014 at 7:08pm*

**Math **

On a forward summer salt dive, a diver's height, h meters above the water can be modelled by the equation h(t)=-2.9(t-0.6)^2+4.8 where t is the time in seconds after the diver leaves the board A) determine the height above the water the diver is before he leaves the board.
*Saturday, October 25, 2014 at 7:03pm*

**Calculus (math)**

A conical water tank with vertex down has a radius of 12 feet at the top and is 23 feet high. If water flows into the tank at a rate of 20 {\rm ft}^3{\rm /min}, how fast is the depth of the water increasing when the water is 12 feet deep?
*Saturday, October 25, 2014 at 6:31pm*

**Math**

Could you show me how to work through this problem? Show me steps Solve for s. Show all steps. –3s ≥ 18
*Saturday, October 25, 2014 at 5:41pm*

**Math**

How do you solve each of these equations for the indicated value? I'm so confused on how to do it 1. a-b=-c, for a 2. 4y+6x=12, for y 3. y=1/2x-10, for x
*Saturday, October 25, 2014 at 5:18pm*

**math**

2. sylvia has 6 1/2 boxes of chocolate to share at a family picnic. if she gives each person 1/3 of a box, how many people can recieve chocolate? 13 17 19 21 3.which of these numbers is not rational? square root 3 0.25 1/5 square root 9 4. a student's work to solve 2 6/7 ...
*Saturday, October 25, 2014 at 4:57pm*

**math**

i dont get how to do this problem mrs. sue please help how would you convert the repating nonterminating decimal to a fraction? explain the process as you solve the problem/0.1515... remember to show all of the steps that you use to solve the problem how would you convince a ...
*Saturday, October 25, 2014 at 4:56pm*

**Math**

a) One mould forms a sculpture that is a composite object comprising a right cylinder with base diameter 15 in. and height 3 in., and a right cone with the same base diameter as the base of the cylinder and a height of 9 in. Determine the volume of the sculpture to the nearest...
*Saturday, October 25, 2014 at 4:55pm*

**math**

how would you convert the repating nonterminating decimal to a fraction? explain the process as you solve the problem/0.1515... remember to show all of the steps that you use to solve the problem how would you convince a fellow student that the number 0.57 is a rational number?
*Saturday, October 25, 2014 at 4:52pm*

**math**

2. sylvia has 6 1/2 boxes of chocolate to share at a family picnic. if she gives each person 1/3 of a box, how many people can recieve chocolate? 13 17 19 21 3.which of these numbers is not rational? square root 3 0.25 1/5 square root 9 4. a student's work to solve 2 6/7 ...
*Saturday, October 25, 2014 at 4:49pm*

**Math**

An igloo approximates a hemisphere, with an entrance tunnel that approximates half a right cylinder. The base of the igloo has diameter 4.0 m. The entrance is 0.8 m long; it has an external radius of 0.8 m and an internal radius of 0.7 m. Calculate the surface area of the ...
*Saturday, October 25, 2014 at 4:33pm*

**Math**

f(x)=3x^2-x-2 If x=2, what is f(x)? What point is on the graph of f? For the first question, I got 8. But, I'm having trouble understanding the second question.
*Saturday, October 25, 2014 at 4:30pm*

**Math**

A solid sphere just fits inside a cube that has an edge length equal to the diameter of the sphere. The edge length of the cube is 5.8 cm. What is the volume of air in the cube to the nearest cubic centimetre?
*Saturday, October 25, 2014 at 4:04pm*

**math**

carol is baking cookies and needs 2 1/4 cups of flour, 2/3 cup of white sugar, 1/4 cup of brown sugar, and 1/16 cup of baking soda. use this information to answer the following questions 2. if the amount of white sugar were increased by a factor of 2 1/2 in cups how much sugar...
*Saturday, October 25, 2014 at 3:07pm*

**Math**

Meg's pension plan is an annuity with a guaranteed return of 7% per year (compounded quarterly). She would like to retire with a pension of $20,000 per quarter for 15 years. If she works 31 years before retiring, how much money must she and her employer deposit each quarter?
*Saturday, October 25, 2014 at 1:07pm*

**Math**

A rental agency claims that the average rent that small business establishments pay in Suva city is $800. A sample of 10 establishments shows an average rate of $20. At alpha = 0.05, there enough evidence to reject the agencies claim? Assume that the population is ...
*Saturday, October 25, 2014 at 1:06pm*

**Math**

A typist can type 146 words in 100 seconds. At this rate, how many minutes and seconds would it take him to type 657 words.
*Saturday, October 25, 2014 at 12:38pm*

**Math**

Which verbal expression represents the algebraic expression? (A) 2 times a number minus 6 (B) twice the difference between 6 and a number (C) 6 less than twice a number (D) twice the difference between a number and 6 I think it's A, am I right? Thank You for your help.
*Saturday, October 25, 2014 at 12:14pm*

**math**

Let f(x) = 3+4x-x^{3}. Find the open intervals on which f is increasing (decreasing). Then determine the x-coordinates of all relative maxima (minima). 1. f is increasing on the intervals? 2. f is decreasing on the intervals?
*Saturday, October 25, 2014 at 12:14pm*

**math**

Find the critical numbers of the function f(x) = x^{1/4}-x^{-3/4}.
*Saturday, October 25, 2014 at 12:13pm*

**Math**

Is this a true statement? x+x+x+2+3=3x+5 I think this is could you tell me if I'm right? Big test comming! Thanks
*Saturday, October 25, 2014 at 11:33am*

**Math**

Simplfy the following expression - 3x + 5x + y+y+y I think the answer is 8x + 3y Would I be right? Thank You
*Saturday, October 25, 2014 at 11:32am*

**geometry**

Quadrilateral Math has been dissected into squares. The area of the red square is 64 square units and the area of the blue square is 81 square units. Determine the dimensions and the area of Quadrilateral Math?
*Saturday, October 25, 2014 at 10:14am*

**Math**

A tree is losing its trees. Two thirds fall off in the first week, two thirds of those remaining fall off in the second week, and two thirds off those remaining fall off in the third week. Now there are 37 leaves. How many leaves did the tree have originally?
*Saturday, October 25, 2014 at 9:06am*

**math**

What percent less than 45 is 25?
*Saturday, October 25, 2014 at 8:37am*

**Math**

Jamal lives 8 blocks from school. Bethany lives 3 times as far from school as Jamal . Michael lives 4 times as far as Jamal and Bethany combined . Write a number sentence that compares how far from school Bethany lives to how far from school Michael lives. Q2/ if you multiply ...
*Saturday, October 25, 2014 at 6:24am*

**math**

A caterer prepares three times as many pizzas as she usually prepares for a large party. The caterer usually prepares 5 pizzas. The caterer also estimates that each party guest will eat 1/3 of a pizza. First write an expression that represents this situation. How many party ...
*Saturday, October 25, 2014 at 4:41am*

**Math**

The Suva Energy Information Administration reported that 51.7% of homes in Suva were heated by natural gas. A random sample of 200 homes found that 115 were heated by natural gas. Does the evidence supports the claim, or has the percentage changed? (use a P-value method)
*Saturday, October 25, 2014 at 2:15am*

**Math**

A rental agency claims that the average rent that small business establishments pay in Suva city is $800. A sample of 10 establishments shows an average rate of $863. The standard deviation of the sample is $20. At alpha = 0.05, is there enough evidence to reject the agencies ...
*Saturday, October 25, 2014 at 2:09am*

**math**

A researcher is interested in estimating the average salary of Police officers in a large city. she want to be 95% confident that her estimate is correct. If the standard deviation is $1050, how large a sample is needed to get the desired information and to be accurate within...
*Saturday, October 25, 2014 at 1:53am*

**Secondary Math **

Fill in the empty spaces to complete the puzzle. In any row, the two left spaces should multiply to equal the right-hand space. In any column, the two top spaces should multiply to equal the bottom space. ________| - 3 | ___________ 3 | -5x+1 |-15x+3 _______ | ________| 30x&...
*Friday, October 24, 2014 at 10:56pm*

**Math **

5x^2-10x+d=0 Determine an integer value for d such that the equation has rational, non zero roots Please show me the steps and how to answer this question :) thanks:)
*Friday, October 24, 2014 at 10:51pm*

**Math**

Yes, it's me again! How would you write the expression that represents the perimeter of a rectangle measuring 4 x - 4 + 7 x + 1 Would it be -4 + 1 = - 5
*Friday, October 24, 2014 at 8:52pm*

**MATH HELP asap PLEASE**

A plane is steering at S83degreesE at an airspeed of 550 km/h. the wind is from N70degreesE at 85 km/h. Determine the ground velocity of plane to one decimal. Use the cosine and sine law.
*Friday, October 24, 2014 at 8:40pm*

**math**

.4(6) = as a simplified fraction? is it possible? if so, can you tell me how?
*Friday, October 24, 2014 at 8:33pm*

**Math**

I meant to say would it be 26 x + 12
*Friday, October 24, 2014 at 8:18pm*

**math**

How would you write the expression that represents the perimeter of a rectangle measuring 9 x + 9 and 4 x - 3 Would it be 26 x + 2 Any help would be appreciated. Thank You
*Friday, October 24, 2014 at 8:16pm*

**Help Math**

Jodi has a model of a tetrahedron (shown below) and would like to know how many different nets exist for the tetrahedron. How do you respond?
*Friday, October 24, 2014 at 8:14pm*

**Math 130**

Jodi says that if you double the radius of a right circular cone and divide the slant height by 2, then the surface area of the cone stays the same since the 2s cancel each other out. How do you respond?
*Friday, October 24, 2014 at 7:42pm*

**help Math **

A student wonders if she triples each measurement of a cereal box, will she need three times as much cardboard to make the new box. How would you help her decide?
*Friday, October 24, 2014 at 7:37pm*

**math**

What to Do: Consider the following, and then do the calculations to solve (formulas and concept explanations in the book). Your business provides a service to local residents. Your fixed costs are $2,000 per month, and you expect 40 customers per month. The variable cost ...
*Friday, October 24, 2014 at 7:35pm*

**math**

Your business provides a service to local residents. Your fixed costs are $2,000 per month, and you expect 40 customers per month. The variable cost associated with each service is $35. 1. Using cost-based pricing and a markup of 20%, what should the price be? Show ...
*Friday, October 24, 2014 at 7:31pm*

**Math**

A students asks how to find the shortest path between two points A and B on two different faces which are neither the top nor the bottom of a right rectangular prism, without leaving the prism. How do you respond?
*Friday, October 24, 2014 at 7:26pm*

**math**

Amy finished 15% of the job, Beth finished 20% of the remaining of the job, then Cathy finished 12% of the remaining of the Job. What percent is sitll not done?
*Friday, October 24, 2014 at 7:15pm*

**Math HELPP**

After increasing the price by 15%, the price of the book becomes 45. What was the original price of the book?
*Friday, October 24, 2014 at 7:05pm*

**math Help!!!!!!**

If Nicholas is located at (-3,2), what is the distance to get to the grocery store? Grocery store is at quadrant 4 and is on 1,-1 A. 2 B. 3 C. 4 D. 5 Is the answer B?
*Friday, October 24, 2014 at 6:29pm*

**Math, Trig/Pre Calc**

You have been asked to build a ramp for Dan’s Daredevil Motorcycle Jump. The dimensions you are given are indicated below. Find the height and incline in feet. Round to the nearest foot One side is 200 ft.The angle between the hypotenuse and the side of 200 ft is 13 ...
*Friday, October 24, 2014 at 6:06pm*

**Math**

What is an irregular number?
*Friday, October 24, 2014 at 5:59pm*

**math Help!!!!!!**

What is the distance between Nicholas's school and the post office? Nicholas's school is in quadrant 1 and is on 3,2 Nicholas's post office is in quadrant 3 and is on -2,-2 A. 6.4 B. 5.2 C. 3.6 D. 3.0 Is the answer C? Thanks
*Friday, October 24, 2014 at 5:54pm*

**math**

You have been asked to build a ramp for Dan’s Daredevil Motorcycle Jump. The dimensions you are given are indicated below. Find the height and incline in feet. Round to the nearest foot One side is 200 ft.The angle between the hypotenuse and the side of 200 ft is 13 ...
*Friday, October 24, 2014 at 5:38pm*

**Math**

15.05 ______ 21.5
*Friday, October 24, 2014 at 5:28pm*

**Math**

You have been asked to build a ramp for Dan’s Daredevil Motorcycle Jump. The dimensions you are given are indicated below. Find the height and incline in feet. Round to the nearest foot One side is 200 ft.The angle between the hypotenuse and the side of 200 ft is 13 ...
*Friday, October 24, 2014 at 4:29pm*

**math Help!!!!!!**

What is the distance between points D and F? Point D is located in quadrant 1 and is on 0,2 Point F is located in quadrant 3 and is on -3,-2 A. 5.4 B. 4.2 C. 3.7 D. 2.6 Is the answer C? Thanks
*Friday, October 24, 2014 at 4:27pm*

**Math Trig**

I'll do my best to describe this problem. Given A=17 degrees, B=73 degrees , x=q, y=5 and z=r use the figure to find the exact value of q and r x = base y = leg z = hypotenuse a = angle between z and x b = angle between z and y 90 degree angle = between x and y Solve for q...
*Friday, October 24, 2014 at 4:23pm*

**math**

I have 21 children in my class total. 6 of them are boys and 15 of them are girls. What is the percentage of males in the class
*Friday, October 24, 2014 at 4:17pm*

**math Help!!!!!!**

What is the distance between points A and E? Point A is in quadrant 1 and is on 3,4 Point B is in quadrnt 2 and is on 0,-1 A. 2.8 B. 3.2 C. 4.9 D. 5.7 Is the answer A?
*Friday, October 24, 2014 at 4:17pm*

**math**

is this correct 3*10^6 3*1000000 3000000
*Friday, October 24, 2014 at 3:55pm*

**Math**

A) P is approximately (0.883, 0.469), is a point on the unit circle with angle 28 degrees estimate the following. Sin 152 degrees = Cos 152 degrees = please help me step by step
*Friday, October 24, 2014 at 3:31pm*

**Math**

Find the coordinates of the point at 180 degrees on a circle of radius 3.4 centered at the origin. Round your answers to three decimal places, if required. ( , 0 ) I got 0 as the y coordinate. Please help me solve for x
*Friday, October 24, 2014 at 2:19pm*

**Math Calc**

Let theta be an angle in the first quadrant, and suppose sin theta equals a. Evaluate sin(180 degrees + theta) in terms of a sin(180 degrees + theta) =
*Friday, October 24, 2014 at 2:15pm*

**math**

Your business provides a service to local residents. Your fixed costs are $2,000 per month, and you expect 40 customers per month. The variable cost associated with each service is $35. 1. Using cost-based pricing and a markup of 20%, what should the price be? Show ...
*Friday, October 24, 2014 at 2:12pm*

**math**

what is the value of 23,565
*Friday, October 24, 2014 at 2:10pm*

**Math**

Using the Descartes Rule of Sign count the number of sign changes of f(-x) and determine the number of negative real zeros. 1. f(x)=x^3+x^2-10x-24 My answer: A few signs due change but not enough to say they changed." 0 sign changes of f(-x), which means f(x) has 0 ...
*Friday, October 24, 2014 at 2:10pm*

**Math**

Using the Descartes Rule of Sign count the number of sign changes of f(x) and determine the number of positive real zeros. 1. f(x)=x^3+x^2-10x-24 My answer: because the signs don't change the answer would be: "0 sign changes of f(x), which means f(x) has 0 positive ...
*Friday, October 24, 2014 at 2:05pm*

**math**

Tasha collected another set of data values, and used a calculator for the engine speed and horsepower data. She got an equation for the least-squares line: ŷ = 10 + 30x. If Tasha uses this equation to predict horsepower from engine speed, the horsepower associated with an...
*Friday, October 24, 2014 at 2:02pm*

**Math Trig**

A kite flier wondered how high her kite was flying. She used a protractor to measure an angle of 40 degrees from level ground to the kite string. If she used a full 120-yard spool of string, how high, in feet, was the kite? (Disregard the string sag and the height of the ...
*Friday, October 24, 2014 at 1:55pm*

**math**

The cost of soup, s, varies directly with the number of cans, c. When c is 4, the cost is $3. Which graph represents the cost of the soup?
*Friday, October 24, 2014 at 12:52pm*

**Math**

Interest is a concept familiar to most people: every credit card in existence has a term called annual percentage rate (APR), which is an interest rate. Suppose you charged $1,000 to a credit card that has a minimum payment each month equal to the interest owed. Can you figure...
*Friday, October 24, 2014 at 12:36pm*

**math please help**

Suppose that ice cream consumption per person at parties is normally distributed with a mean of 0.39 gallons, and a standard deviation of 0.26 gallons. If you are throwing a party with 33 guests, how much ice cream do you need to buy to make sure that the probability of having...
*Friday, October 24, 2014 at 11:38am*

**Algebra/math 117**

sequence an = 6n, starting with n = 1.
*Friday, October 24, 2014 at 10:23am*

**math**

Given: 2x + 3y = 6. What is the y-intercept? (0, 3) (2, 0) (0, 2) no intercept
*Friday, October 24, 2014 at 10:00am*

**Math**

x/9 -4= 5/18
*Friday, October 24, 2014 at 7:10am*

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