Tuesday

November 25, 2014

November 25, 2014

**Branches of Math**

**Recent Math Questions**

Post a New Question | Current Questions

**math**

An airport passes over an airport and continues flying on a heading of N 70¡ãW for 3 km. The airplane then turns left and flies another 2 km until the airport is exactly due east of its position. What is the distance between the airplane and the airport, to the ...
*Monday, November 3, 2014 at 12:53am*

**Math**

1. What are the last two digits of 9^2013? 2. Show that 5^t=2 + 3(5^t+1) - 40(5^t) is equal to zero. 3. Under certain conditions, I = 10^D/10 where D is the number of decibels of a sound and I is its intensity. If he shouts with 30 more decibels that she talks with, what is ...
*Sunday, November 2, 2014 at 11:10pm*

**math**

If rectangular workroom with a perimeter of 26 feet. The length of workroom is 6 feet. What is the width?
*Sunday, November 2, 2014 at 10:05pm*

**Math**

Find the specified term of the expansion in each of the following: a.6th term of (3x + y)^9 b.Middle term of (3x+y^3)^8 c.The term in (x + 2y)^10 that involves x^7
*Sunday, November 2, 2014 at 10:04pm*

**Math**

1. The population,P, in thousands, of a country is P=10^8(1.5)^t/20 where t is measured in years. How long will it take for the population to increase 125 percent?(Hint: If the population increases by 100 percent, it doubles.) 2. How long would it take for a P10,000 investment...
*Sunday, November 2, 2014 at 9:55pm*

**math**

Karen collects 6/7 quart of rainwater. she uses half to clean her bicycle and uses the remaining to equally water 3 plants
*Sunday, November 2, 2014 at 9:55pm*

**Math**

The pressure, P (in lbs/ft2), in a pipe varies over time. Three times an hour, the pressure oscillates from a low of 88 to a high of 254 and then back to a low of 88. The pressure at t=0 is 88. Find a possible cosine formula for P=f(t), where t is time in minutes.
*Sunday, November 2, 2014 at 9:37pm*

**Math Calc**

Given a right triangle ABC with a=13 and b=26, find the value of angle A, angle B, and side length c. Round to the nearest thousandth.
*Sunday, November 2, 2014 at 9:36pm*

**Math**

How to solve x^2-y^2-2y-1
*Sunday, November 2, 2014 at 8:58pm*

**math**

Suppose P is the theoretical probability of an event occurring. Which of the following is the correct formula for calculating P?
*Sunday, November 2, 2014 at 8:13pm*

**math**

-3n-(-1)=29 My answer is n=9.9 I doubt plZ help. Thank you,
*Sunday, November 2, 2014 at 6:51pm*

**Math**

The area of a rectangle pool was 120 square meters. If the long side is 7 meters plus a number and the width is 6 meters. What is the value of the variable? I couldn't make a equation for this; I tried and I got 7+x+6 = 120 and that doesn't seem right.
*Sunday, November 2, 2014 at 6:13pm*

**Math (I've been on this problem for 3 hours)**

If the supply and demand functions for a commodity are given by 2p - q + 10 = 0 and (p + q)(q + 10) = 3642 respectively, find the equilibrium price and quantity that give market equilibrium. (Round your answers to two decimal places.) Equilibrium price =
*Sunday, November 2, 2014 at 2:05pm*

**math**

the length of a rectangle exceed its breadth by 4cm.if length and breadth are incresed by 3cm the aera of the new reactangle will be 81cm more then that of the given reactngle.then a)length of the given rectangle is? b)breath of the given rectangle is? c)area of new angle is?
*Sunday, November 2, 2014 at 11:57am*

**Math Please HELP**

If the supply function for a commodity is given by the equation p = q2 + 12q + 700 and the demand function is given by the equation p = 1800 - 10q - q2, find the equilibrium quantity and equilibrium price. (Round your answers to two decimal places.)Thank You so much
*Sunday, November 2, 2014 at 11:43am*

**Math**

Larry kicked a ball at a 50 degrees angle to a direction north. It travels a horizontal distance of 20ft 9inchs before hitting the ground .The ball travels exactly 1min 18 sec after hitting the ground. The ball hit a mud and cause dthe ball to subside 2inches. Question: how ...
*Sunday, November 2, 2014 at 10:16am*

**math**

Four times the sum of a number and 15 is at least 120. Let x represent the number. Find all possible values for x. A. x ≥ 26 B. x ≥ –15 C. x ≥ 15 D. x ≥ –26
*Sunday, November 2, 2014 at 8:55am*

**math**

A bottle of cordial contains 5litres ,of which 10% I'd pure fruit juice.hoe many liters of water must be added to dilute to 4% fruit juice.can anybody explain please,thanks
*Sunday, November 2, 2014 at 5:59am*

**math**

Can anyone explain please,thank.the sum of 8numbers is x,and the sum of different set of nine numbers is 2x.the average of the smaller set of numbers is 1 more than the average of the larger set of numbers
*Sunday, November 2, 2014 at 5:53am*

**Math**

Worldwide annual sales of all cellphones were approximately −10p + 1,600 million phones when the wholesale price was $p. At what wholesale price should cellphones have been sold to maximize annual revenue?
*Sunday, November 2, 2014 at 1:15am*

**math**

if x is the number of trees make an equation that shows the y number is the number of grocery paper bags made by the trees
*Sunday, November 2, 2014 at 1:14am*

**math**

fly happy airlines lets each passenger bring 2 suitcases. their cargo area can hold 30 suitcases. How many passengers can fly on Fly Happy's plane?
*Sunday, November 2, 2014 at 12:53am*

**math**

there are 4 quarters in a dollar. Steven earned 3 dollars last month. How many quarters did he earn?
*Sunday, November 2, 2014 at 12:49am*

**Math**

A deposit of $10,000 is made in a trust fund that pays 4.9% interest, compounded monthly. What is the balance of the trust fund after 15 years?
*Sunday, November 2, 2014 at 12:00am*

**physics, math**

A hot air balloon with a mass of 18.0 kg is accelerating upward at 1.80 m/s^2 (Anet = 1.80 m/s^2). What is the weight and buoyant force acting on the balloon?
*Saturday, November 1, 2014 at 10:05pm*

**Math**

A woman has money in two accounts. One account pays 7% annual interest, whereas the other pays 15% annual interest. If she has $1,500 more invested at 15% than she does at 7% and her total interest for a year is $1,545, how much does she have in each account? Please show the ...
*Saturday, November 1, 2014 at 8:06pm*

**Math**

Jane grows several varieties of plants in a rectangular-shaped garden. She uses fencing to divide the garden into 16 squares that are each 1 m by 1 m. She also puts fencing around the perimeter of the garden. What should the dimensions of the garden be so that Jane uses the ...
*Saturday, November 1, 2014 at 7:06pm*

**Math**

There h horizontal lines and v vertical lines drawn in a plane. There are r ways to choose four lines such that a rectangular region is enclosed. Given that r is divisible by 1001. Find the minimum value of h+v. I am really not sure where to start.
*Saturday, November 1, 2014 at 4:52pm*

**Math**

Jane grows several varieties of plants in a rectangular-shaped garden. She uses fencing to divide the garden into 16 squares that are each 1 m by 1 m. She also puts fencing around the perimeter of the garden. What should the dimensions of the garden be so that Jane uses the ...
*Saturday, November 1, 2014 at 4:18pm*

**MATH**

POINT A AND POINT B ARE 5 UNITS APART .THE COORDINATES OF POINT A ARE (3,-9).THE y COORDINATES OF POINT B IS -9 .WHAT IS A POSSIBLE X-COORDINATE FOR POINT B?
*Saturday, November 1, 2014 at 4:11pm*

**Math**

Write an equation of a line that passes through the point (8,2) that is (a) parallel and (b) perpendicular to the graph of the equation y= 4x +3
*Saturday, November 1, 2014 at 4:07pm*

**Math**

the lenght of a rectangular field is thrice its breadth. if the area of field is 7500 m square, find the cost of fencing the field at the rate of RS 10 per meter
*Saturday, November 1, 2014 at 2:37pm*

**Math/I'm an adult**

if 14W=5R, what does 16W equal?
*Saturday, November 1, 2014 at 2:32pm*

**Math**

5/6=1/3-x
*Saturday, November 1, 2014 at 1:50pm*

**Math Help**

1.) Use the graph of f to describe the transformation that yields the graph of g. f(x)=10^x g(x)= 10^-x+3 a.) Reflect the graph of f in the y-axis and shift three units to the left. b.) Reflect the graph of f in the y-axis and shift three units to the right. c.) Reflect the ...
*Saturday, November 1, 2014 at 1:02pm*

**Math**

Simultaneous equations- The tickets for a sports club disco cost £2 for members and £3 for non-members. a)The total ticket money collected was £580. x tickets were sold to members and y tickets were sold to non-members. Use this information to write down an ...
*Saturday, November 1, 2014 at 12:41pm*

**MATH: Need help please **

Find the linear approximation of f(x)=\ln x at x=1 and use it to estimate ln 1.12. L(x)= . ln 1.12 approx
*Saturday, November 1, 2014 at 12:12pm*

**Math**

If fencing cost $7 per foot find the total cost of fencing a rectangular garden 36ft by by 12ft
*Saturday, November 1, 2014 at 12:11pm*

**math**

what **1/8 means?.
*Saturday, November 1, 2014 at 11:51am*

**Math**

If the correct answer is 7.52609, which of the following entries would be counted as correct? That is, which entries are withing Webassigns default tolerance? select all that apply. 7.4 7.3680 7.53 7.458 7.68 7.5938
*Saturday, November 1, 2014 at 11:42am*

**MATH**

Fraction form 1/3 if changed Decimal form it is 1/3=0.331/3 if changed to Percent form it is 1/3=331/3% Is this correct? I just want make sure.
*Saturday, November 1, 2014 at 11:42am*

**Math**

Find the linear approximation of f(x)=ln x at x=1 and use it to estimate ln 1.12. L(x)= ? ln 1.12 \approx ?
*Saturday, November 1, 2014 at 10:39am*

** math**

in math problem.how to change simplified fraction form 2/3 to decimal form and percent form
*Saturday, November 1, 2014 at 10:20am*

**Math**

tariq jogs 63250 m every week. how much will he jog in 149 days? Give your answer km.
*Saturday, November 1, 2014 at 9:59am*

**math**

find the distance between the points (-20,16) and (-15,19). also find the midpoint of the segment that joins the points. what is the distance?_____ what is the midpoint?______
*Saturday, November 1, 2014 at 9:14am*

**Math**

A plane leaves an airport X, 20.6degrees east and 36.8 north degrees and flies due south along the same longitude for 8 hours at the rate of 1000km/h to another airport Y, 20.6degrees east and tita degree south. The plane then flies west to another airport Z for 8hours at the ...
*Saturday, November 1, 2014 at 7:44am*

**Math**

Create your own polynomial with a degree greater than 2.Find the 0's of the function.
*Saturday, November 1, 2014 at 3:22am*

**math**

In the ocean, there are areas where there are very few living things. _________________________ is the term that describes when this happens to a natural area.
*Saturday, November 1, 2014 at 2:42am*

**Math**

A “gazing ball” is a spherical garden ornament with a mirrored surface that reflects its surroundings. The surface area of the ball is approximately 314 square inches. What is its volume to the nearest cubic inch?
*Friday, October 31, 2014 at 11:35pm*

**Math**

150 men live in a certain town: 85 are married 70 have a cell phone 75 own a car 55 are married and have a cell phone 35 have a cellphone and a car 40 are married and have car 30 are married, have a car and have a cellphone. How many men are single and do not have a car? How ...
*Friday, October 31, 2014 at 10:06pm*

**Math**

On December 16, 1811, an earthquake occurred near New Madrid, Missouri, that temporarily reversed the course of the Mississippi River. The quake had a magnitude of 8.8. On October 17, 1989, a calamitous quake measuring 7.1 on the Richter scale occurred in San Francisco during ...
*Friday, October 31, 2014 at 9:46pm*

**math**

find the slope of the line containing the pair of points. (-5,-10) and (-4,-3)
*Friday, October 31, 2014 at 9:33pm*

**Math**

The length of a rectangle is 3 times the width. If the perimeter is to be at least 48 meters, what are the possible values for the width? (If the perimeter is at least 48 meters, then it is greater than or equal to 48 meters.)
*Friday, October 31, 2014 at 8:25pm*

**Math**

A man has $1.15 in quarters and dimes in his pocket. If he has one more dime than he has quarters, how many of each coin does he have?
*Friday, October 31, 2014 at 8:22pm*

**math**

Evaluate the function f(x)=-3x+9 at the indicated values. a). f(2)=_____ simplify your answer b).f(-2)=_____ simplify your answer
*Friday, October 31, 2014 at 6:49pm*

**math**

if the inequality is: (x+5/x-2)>0 . "x-5 over x-2 greater or equal to 0". What would be the solution? a.(-infinity sign, -5] U (2, infinity sign) b.(-5,2) c.(-infinity sign, -5) U [2, infinity sign) d.[-5,2] My answer was C. Am I correct?
*Friday, October 31, 2014 at 3:38pm*

**Math**

A mountain pine beetle population can double every year if conditions are ideal. Assume the forest in Jasper National Park,AB has a population of 20 000 beetles. The formula P=20 000(2)^n can model the population,P,after n years. a) How many beetles were there in the forest ...
*Friday, October 31, 2014 at 2:18pm*

**Math **

"A players shuffles 7 red cards and 3 green cards into a random order then places them in a line. If all green cards are net to each other, he wins £10. If all are apart, he wins £2. Otherwise he wins nothing. Find the price up to which the player would be ...
*Friday, October 31, 2014 at 11:57am*

**Math, Please Help! I don't understand!**

Please help me! I don't understand how to solve. Solve each equation for the given variable. 37. x/a - 1 = y/b for x 39. V = 1/3 * pi * r^2 * h for h What do these equations mean? I am super confused. Please help.
*Friday, October 31, 2014 at 11:52am*

**Math Calculous**

Given a = 13, b = 29, find the missing sides and angles in the right triangle, where a is the side across from angle A, b, across from B, and c across from the right angle Round your answers to three decimal places c = 31,780, A = ?, B = ? trying to find A and B
*Friday, October 31, 2014 at 11:46am*

**Math, Can someone check my answers?**

Can someone please check my answers? Tell whether the given equation has the ordered pair as a solution. 11. y = 6x;(3,16) 13. y = -4x; (-2,8) 15. y = x - 3/4; (2,1 1/4) Answers: 11. Not a solution 13. Has a solution 15. Has a solution
*Friday, October 31, 2014 at 11:18am*

**Math Calc**

Solve the equation 7sin(theta)=6 for theta, an angle in the right triangle Round your answer to three decimal places. Theta = 58.998? I don't think I got this right.. Please help
*Friday, October 31, 2014 at 11:12am*

**Math Arc Length**

Find the arc length corresponding to an angle of a degrees on a circle radius of 4.9 Enter the exact answer. I put the arc length was 4.9api/180 got it wrong. Any help?
*Friday, October 31, 2014 at 11:03am*

**math**

kamala had 5026 grams of flour in a canister. she bought a 4157 gram bag of flour. she poured some flour from the bag to the canister. as a result, the mass of the flour in the canister is now twice the mass of the flour left in the bag. how much flour is in the bag now?
*Friday, October 31, 2014 at 9:04am*

**Math**

How do i find the length of a projection of a vector A=3x+y+2z on the xy plane? and how do i find the unit vector in the xy plane that is perpendiculer to vector A?
*Friday, October 31, 2014 at 8:25am*

**Math**

Randolph runs a home appliance repair business and charges a service call fee of $85 plus $15 per half hour for his labour. Write an equation for calculating the total charges, C, in terms of hours of labour, H. Plot the graph of C vs. H and define the slope and C-intercept of...
*Friday, October 31, 2014 at 7:42am*

**Math**

a) prove the identity: Ax(BXC)=B(A*C)-C(A*B) A,B,C vectors x- cross product *-dot product b) use part a) to prove that cross product is not associative.
*Friday, October 31, 2014 at 4:13am*

**Math Please Check**

Please tell me if this are right. Thank you! Find the exact location of all the relative and absolute extrema? h(t) = t^3 - 3t^2 domain: [-1, + infinity) For this one I got x=2 as the minimum, and x=0 as the maximum. g(t) = 3t^4 - 16t^3 + 24t^2 +1 domain: (-infinity, +infinity...
*Thursday, October 30, 2014 at 11:00pm*

**math**

How can u write a unit rate if a least one term is a fraction? How is this different from writing a unit rate where both terms are whole numbers?
*Thursday, October 30, 2014 at 10:52pm*

**Math**

show how to make one addend the next tens number and complete the new addtion sentence. This question has cubes but it also has 22+49= ___+____=
*Thursday, October 30, 2014 at 10:37pm*

**math thanks for your help**

let f(x)=-4x+7. find and simplify f(n) f(n)=_____ simplify your answer
*Thursday, October 30, 2014 at 10:29pm*

**Math**

6 km to miles and the nearest yard? 6km*1mi/1.609km=3mi But how do I get to the yards from converting because my data booklet doesn't tell me 1yd=?km.
*Thursday, October 30, 2014 at 10:24pm*

**math**

Karen collects 6/7 quart of rainwater. She uses ½ of the water to clean her bicycle and uses the remaining water equally for 3 houseplants. What volume of water does she use for each houseplant?
*Thursday, October 30, 2014 at 9:42pm*

**math**

after 3/4 of a minute a sloth has move just 3/8 of a foot. what is the sloth,s speed in feet per minute?
*Thursday, October 30, 2014 at 9:35pm*

**Math 11**

A triangular pyramid has faces that are all equalatetal triangles. Each side length is 16 cm. What is the surface area of the pyramid?
*Thursday, October 30, 2014 at 9:05pm*

**math**

let f(x)=-5x+6 find and simplify f(x+2) f(x+2)=___
*Thursday, October 30, 2014 at 9:05pm*

**Math **

916:3= 305
*Thursday, October 30, 2014 at 9:04pm*

**math really need help!**

let f(x)=-5x+6 find and simplify f(x+2) f(x+2)=___
*Thursday, October 30, 2014 at 8:58pm*

**math**

It is greater than 43ànd less than 52. If you add the digits. The sum is 8 write the number word
*Thursday, October 30, 2014 at 8:32pm*

**math please help**

let f(x)=-5x+6 find and simplify f(x+2) f(x+2)=____
*Thursday, October 30, 2014 at 8:21pm*

**Math-urgent-**

What's 11/12 divided by 3/4 in repeated subtraction?
*Thursday, October 30, 2014 at 8:20pm*

**Math**

if 150 vehicles passed luann how many more minivans than cars would you expect to pass her assume the rate continues
*Thursday, October 30, 2014 at 7:11pm*

**math**

kaya is making dream catchers. each dream catchers uses 6 feathers. she makes 4 dream catchers with black feather 3 with brown 1 with white and 2 with gray. what fraction of the dream catcher have either black or brown feather
*Thursday, October 30, 2014 at 6:54pm*

**math**

there are boxes of tangerines each box has 93 tangerines the Tangerines will be divided equally among 9 classrooms how many tangerines will each classroom get
*Thursday, October 30, 2014 at 5:58pm*

**Math**

if a flagpole is 20ft tall and casts a shadow of 27ft how tall is a building that casts a shadow of 185ft? write a proportion and solve. round your answer to the nearest foot.
*Thursday, October 30, 2014 at 5:52pm*

**7th grade math**

Can you check my answers? 1. 48lbs 6oz - 19lbs 9oz = 47lbs 22oz - 19lbs 9oz Ans: 38lbs 13oz 2. 3weeks 5days x 8 = 24weeks 40days; 40days=8weeks Ans: 32weeks 3. 49 people are in line to see a movie. 17 are in front of Jackie. How many are behind her? 49 - 18 = 31 Ans: 31 people...
*Thursday, October 30, 2014 at 5:48pm*

**Math**

Write the slope intercept form fo an equation of the line that passes through the given point and has the given slope 1. Point (1,1) Slope 1/4 Formula y-y1=m(x-x1) Answer : y=1/4x+0
*Thursday, October 30, 2014 at 5:46pm*

**Math**

equation is J=0.15h J=total cost, h=hats How much would it cost to buy 10 hats? calculate the total cost and show how you got the answer. would it be J=0.15*10 ? thank you
*Thursday, October 30, 2014 at 5:45pm*

**Physics Math**

A flat-bottom river barge is 30.0 ft wide, 85.0 ft long, and 15.0 ft deep. (a) How many ft3 of water will it displace while the top stays 3.00 ft above the water? (b) What load in tons will the barge contain under these conditions if the empty barge weighs 160 tons in dry dock?
*Thursday, October 30, 2014 at 5:42pm*

**Math**

Arrange the following real numbers in order from greatest to least: 0.8, 0.8(repeating 8), 0.89(repeating 89), 0.889( repeating the second 8 and 9), and 0.88. I think I got it, but just want to make sure.
*Thursday, October 30, 2014 at 5:35pm*

**math**

f(x)= x^3 - 2x^2 - 21x - 18 all possible rational zeros # of possible positive zeros # of possible negative zeros find all the real zeros
*Thursday, October 30, 2014 at 5:21pm*

**math**

a box of chalk and 2 staplers costs $10. 3 boxes of chalk and 2 staplers costs $18. find total cost of 1 box of chalk and 1 stapler
*Thursday, October 30, 2014 at 5:06pm*

**math**

two types of sandwiches were made for a tea party. 55% of the sandwiches were cheese sandwiches and the rest were chicken. If there were 252 chicken sandwiches, how many sandwiches were made altogether?
*Thursday, October 30, 2014 at 4:40pm*

**Math**

You have a recipe for homemade cookies that makes 5 batches.if the recipe calls for 3 and 1/3 cups of milk, how much milk would you need to make 1 batch?
*Thursday, October 30, 2014 at 4:34pm*

**math**

there are 6 purple socks and 4 orange socks in a drawer. zucky picked one sock without looking and then another without looking or replacing the first. what is the probability that he picked 2 purple socks?
*Thursday, October 30, 2014 at 4:11pm*

**Math**

x + 3 = 1 2 5 4 what is x?
*Thursday, October 30, 2014 at 3:57pm*

**Math**

X/2 + 3/5 = 1/4
*Thursday, October 30, 2014 at 3:27pm*

**Math/Physics**

The potential at the surface of a sphere (radius R) is given by V_0 = k cos 3theta where k is constant. Find the potential inside and outside the sphere as well as the surface charge density (lower case sigma(theta)) on the sphere. (assume there is no charge inside or outside ...
*Thursday, October 30, 2014 at 3:14pm*

**Math/Physics**

My question is this: The potential at the surface of a sphere (radius R) is given by V_0 = k cos 3theta where k is constant. Find the potential inside and outside the sphere as well as the surface charge density (lower case sigma(theta)) on the sphere. (assume there is no ...
*Thursday, October 30, 2014 at 2:45pm*

**Math**

Solve the quadratic function y=2x^2-14x -16 by completing the square. Round roots to the nearest hundredth, if necessary. Show your work.
*Thursday, October 30, 2014 at 1:43pm*

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