Wednesday

October 1, 2014

October 1, 2014

**Branches of Math**

**Recent Math Questions**

Post a New Question | Current Questions

**Math- Multi-step word problems**

A plane traveling from Phoenix to Washington, D.C with a tailwind of 20 miles per hour takes 3 hours. The return trip in the same wind, which is now a headwind, takes the same plane 3 hours and 12 minutes. What is the average speed of the plane in calm conditions? 600 miles/...
*Wednesday, October 1, 2014 at 3:30pm*

**Math- Multi-step word problems**

A canoe in still water travels at a rate of 10 miles per hour. The current today is traveling at a rate of 3 miles per hour. If it took an extra hour to travel upstream, how far was the trip one way? about 14 miles about 15 miles about 16 miles about 17 miles
*Wednesday, October 1, 2014 at 3:29pm*

**Math- Multi-step word problems**

A plane traveling from Chicago to Boston with a tailwind of 10 miles per hour takes 4 hours. The return trip in the same wind, which is now a headwind, takes the same plane 4 hours and 9 minutes. According to this problem, about how far is it from Chicago to Boston? 1800 miles...
*Wednesday, October 1, 2014 at 3:28pm*

**Math--1 question**

Write an equation for the problem below. Is the given value a solution? A farmer sees 56 of his cows out of the barn. He knows that he has 83 cows all together. Let c represent the number of cows still in the barn. Could c = 33? (1 point) 56 + 83 = c; no 56 + c = 83; no 83 + ...
*Wednesday, October 1, 2014 at 3:12pm*

**Math**

Write an integer to represent the final temperature. The day started out at 6am as 32 degrees rose 24 degrees by noon and dropped 14 degrees at 6pm.
*Wednesday, October 1, 2014 at 3:02pm*

**math**

how we can knew the minimum value of the point on a curve?
*Wednesday, October 1, 2014 at 2:45pm*

**math**

An oil tank has a capacity of 45 gallons.At the beginning of October it is 80% full.At the end of October it is 1/3 full.How many gallons of oil were used in October? a. 21 b. 25 c. 41 d. 27 e. 30 my answer is (e)30, 45 x 1/3 =15 ,so 2/3 = 30
*Wednesday, October 1, 2014 at 2:30pm*

**Math Multiplication **

What are the factor pairs of 642? Please dont ask what I dont understand because I cant find the answer
*Wednesday, October 1, 2014 at 2:26pm*

**math**

The diameter of a circle is increased by 50%.The area is increased by a. 50% b. 100% c. 125% d. 200% e. 250% please answer and explain
*Wednesday, October 1, 2014 at 2:26pm*

**math**

If the outer diameter of a cylindrical oil tank is 54.28 inches and the inner diameter is 48.7 inches,the thickness of the wall of the tank,in inches, is
*Wednesday, October 1, 2014 at 2:23pm*

**Math**

Suppose an urn contains 10 balls numbered from 1 to 10. Someone draws 3 balls simultaneously from the urn (i.e. without replacement.) What is the probability that the lowest number drawn is 2? (8C3)/(10C3) but I know that is wrong. I also tried ((8C3)+(7C3)+(6C3))/(10C3)
*Wednesday, October 1, 2014 at 1:39pm*

**math**

Which diagram correctly represents this sentence?
*Wednesday, October 1, 2014 at 1:37pm*

**math**

The area of a circle is found with the formula A =〖πr〗^2, where π represents 3.14. If a tile artist is placing tiles in a circular mosaic pattern and the area of the circle is 658 square feet, what is the approximate radius of the circle in feet? a.)10...
*Wednesday, October 1, 2014 at 1:15pm*

**Math**

A study shows that 6% of household appliances fail during any given year. If a person has 6 household appliances, what is the probability that exactly 2 of them will fail next year? (x) npq = P(.6+.94)=1 6*2=12
*Wednesday, October 1, 2014 at 1:11pm*

**Math**

y - y1 = m(x-x1) solve for x1
*Wednesday, October 1, 2014 at 1:07pm*

**Math**

What is the answer to 4 square root 1280 r^8 t^12 ?
*Wednesday, October 1, 2014 at 12:35pm*

**math**

students of class XI of a school were motivated to apply for NCC. from each section equal number of students opted for NCC. if there are 3x + 11 sections of class XI and total number of students in all the sections is represented by 6x^3+13x^2+6x+158, then find the number of ...
*Wednesday, October 1, 2014 at 11:08am*

**Math Definition Help**

A function f(x) has an inverse function, g(x), if and only if f(x) is one-to-one. True or False? My answer: True
*Wednesday, October 1, 2014 at 8:15am*

**Math Help**

Find the inverse of f(x)=3x+4/5
*Wednesday, October 1, 2014 at 8:05am*

**MATH**

ln (3x-2/x-1) <0 Can I re-write this as (3x-2/x-1)<e^0 And e^0 is 1? And then I can solve for x?
*Wednesday, October 1, 2014 at 7:10am*

**Math**

1. A 16-team bowling league has 800,000 to be awarded as prize money. If the last-placed team is awarded 12,500 in prize money and the award increases by a constant amount for each successive finishing place, how much will the first-placed team receive? 2. In Museum A, a stamp...
*Wednesday, October 1, 2014 at 7:10am*

**math**

Write the first six terms of the arithmetic sequence with the given properties. a = 3, d = 2 a. 3,8,13,18,23,28 b. 3,5,7,9,11,13 c. 3,6,8,10,12,14 d. 2,7,12,17,22,27 e. 2,4,6,8,10,12
*Wednesday, October 1, 2014 at 4:11am*

**Math**

3/8+9/7
*Wednesday, October 1, 2014 at 3:31am*

**3rd garde math**

what is 12 x 12? im having a hard time can anyone help me??????????
*Wednesday, October 1, 2014 at 3:06am*

**math **

In how many ways can a row of three contestants for a TV game show be selected from an audience of 350 people?
*Wednesday, October 1, 2014 at 2:07am*

**math**

In a class of 100 students 50 are footballers 30 are basketballers and 20 are both basket ballers and footballers represent the above information ina venn diagram
*Wednesday, October 1, 2014 at 2:05am*

**Math**

List out the elements of the set "The letters of the word Mississippi"
*Wednesday, October 1, 2014 at 2:01am*

**Math**

Write an equation for the line in slope intercept form Slope:-2 passing through (-2,8)
*Wednesday, October 1, 2014 at 1:18am*

**Math**

An electrician was hired to run the wires for a surround-sound stereo speaker system. She purchased 2 rolls of 14-gauge speaker wire. Each roll contains 4 m of wire. For each of 2 speakers, 2 ft. of wire are required. For each of the other 2 speakers, 11 ft. of wire are ...
*Wednesday, October 1, 2014 at 12:06am*

**Math**

Bianca is making scarves to sell has 33 pieces of of blue fabric 37 pieces of green fabric and 41 pices of red fabric suppose Bianca uses 3 pieces of fabric to make 1 scarf how many scarves can she make?
*Tuesday, September 30, 2014 at 11:47pm*

**Math**

Convert 2yd, 2ft, 5in. to centimeters. Convert 10yd,1ft, 7in. to meters. I tried it twice but still didn't get it right. Please help me out.
*Tuesday, September 30, 2014 at 11:21pm*

**Math**

The question is: f(x)=(1+2x)/(1+x), find the inverse and state the domain I have made it up to y=(1+2x)/(1+x) x=(1+2y)/(1+y)
*Tuesday, September 30, 2014 at 10:55pm*

**MATH**

SASHA AND FRANCISCO WERE SELLING LEMONADE FOR $.25 PER HALF CUP AND $.50 PER FULL CUP. AT THE END OF THE DAY THEY HAD COLLECTED $15 AND HAD USED 37 CUPS. HOW MANY FULL CUPS AND HOW MANY HALF CUPS DID THEY SELL?
*Tuesday, September 30, 2014 at 10:55pm*

**7th grade math**

Can you check this problem? Jean has 5 different colors of markers: red, blue, green, orange, and purple. Two colors are used to make a sign. How many different combinations are possible? List them. Ans: 10 possible combinations red/blue, red/green, red/orange, red/purple, ...
*Tuesday, September 30, 2014 at 10:50pm*

**math 4 **

yson talked with 150 customers on his shift yesterday. Of those, 20% resulted in a successful upsell of additional purchases. If Tyson makes a $6 commission on top of his regular salary for each successful upsell that he makes, how much commission did he make yesterday? $ 30...
*Tuesday, September 30, 2014 at 10:47pm*

**math 3**

A customer sent in a $230 check to pay off an overdue bill but failed to pay the interest that accrued over the 45 days after the posted due date. The original balance owed was $230, and the account accrues interest at $0.42 per day. What amount of money should the customer ...
*Tuesday, September 30, 2014 at 10:46pm*

**2 math **

Denise spoke with a total of 80 customers on her shift at work today. Of those customers, 55% resulted in a sale, 15% said they would "come back another time", and 10% were sent to speak with the supervisor on shift. What is the total number of customer sales that ...
*Tuesday, September 30, 2014 at 10:45pm*

**Math**

I forgot how to do inequalities with a rational function. The question I have is: ((3x-2)/(x-1))<1
*Tuesday, September 30, 2014 at 10:24pm*

**math**

the ratio of the number of people who own a smartphone than a flip phone, how many people own each type of phone?
*Tuesday, September 30, 2014 at 10:20pm*

**Math (LCM)**

A music store gives every 20th customer a $5 gift card. every 50th customer gets a $10 gift card. Which customer will be the first to receive both types of gift cards? Use prime factorizations.
*Tuesday, September 30, 2014 at 10:04pm*

**math**

a man has 35 models. he has 4 times as many airplane models as he does helicopter models. how many airplane models does he have?
*Tuesday, September 30, 2014 at 10:01pm*

**Math (LCM)**

A music store gives every 20th customer a $5 gift card. every 59th customer gets a $10 gift card. Which customer will be the first to receive both types of gift cards? Use prime factorizations.
*Tuesday, September 30, 2014 at 9:56pm*

**Math .**

3(4x - 2) = 2(6x - 3) one solution infinite solutions ** no solution a+5 = 1/5(5a + 25) one solution infinite solutions no solution ** 3(4x - 3) - 7x = 5x - 9 one solution infinite solutions no solution 8+2(8x - 6) (choose all that apply) 2(4x + 7) 9x – 10 16x – 4...
*Tuesday, September 30, 2014 at 9:50pm*

**math**

Kevin is a quarterback on the football team. He completed 36 passes during the season. His second-string replacement mark completed 2/9 as many passes as kevin. how many passes did Mark complete?
*Tuesday, September 30, 2014 at 9:48pm*

**math**

mary put new tiles on her kitchen floor. the floor measures 6 feet long by 5 feet wide. she used 10 tiles to cover the entire floor. each tile was 3 feet long. write an equation using the variable x to model this situation. what does x represent in the equation?
*Tuesday, September 30, 2014 at 9:30pm*

**math**

what are the missing numbers between 21 and 63
*Tuesday, September 30, 2014 at 9:15pm*

**Math**

How to plot (0,-2)
*Tuesday, September 30, 2014 at 9:13pm*

**Math**

Suppose an experiment involves rolling a fair die 720 times. Find the mean of the number of times a number less than 2 is rolled
*Tuesday, September 30, 2014 at 9:11pm*

**math**

1. Finding the Counterfeit Coin. You have 5 coins. You know that one of them is counterfeit and weighs less than the others. Suppose also that you have a balance scale. Is there a strategy for finding the counterfeit coin using the balance scale only twice? If yes, what is the...
*Tuesday, September 30, 2014 at 8:46pm*

**Math**

A woman has a total of $10,000 to invest. She invests part of the money in an account that pays 6% per year and the rest in an account that pays 9% per year. If the interest earned in the first year is $750, how much did she invest in each account?
*Tuesday, September 30, 2014 at 8:36pm*

**Math**

Travis has a total of $6,000 invested in two accounts. The total amount of interest he earns from the accounts in the first year is $420. If one account pays 6% per year and the other pays 9% per year, how much did he invest in each account?
*Tuesday, September 30, 2014 at 8:36pm*

**Math**

A woman owns a small, cash-only business in a state that requires her to charge 6% sales tax on each item she sells. At the beginning of the day, she has $290 in the cash register. At the end of the day, she has $1200 in the register. How much money should she send to the ...
*Tuesday, September 30, 2014 at 8:35pm*

**Math**

Every item in the Just a Dollar store is priced at $1.00. When Mary Jo opens the store, there is $127.00 in the cash register. When she counts the money in the cash register at the end of the day, the total is $1,055.80. If the sales tax rate is 8%, how many items were sold ...
*Tuesday, September 30, 2014 at 8:35pm*

**Math**

The third angle in an isosceles triangle is 116° more than twice as large as each of the two base angles. Find the measure of each angle.
*Tuesday, September 30, 2014 at 8:34pm*

**7th grade math**

find the sum 7/20 + (-4.8) + (-4/5) +4.9 im cluless
*Tuesday, September 30, 2014 at 8:08pm*

**math**

A room measures 14 feet by 20. feet. How many tiles would it take to cover the deck if the square tiles measure 8.0 inches to the side?
*Tuesday, September 30, 2014 at 7:56pm*

**8th grade math**

At 2pm the temperature is 22 degrees, by 4am it is negative 7 degrees. We think the answer in the change of temperature is 29 degrees am I right?
*Tuesday, September 30, 2014 at 7:44pm*

**Math**

4(2x + 3) = 2(3x - 4) one solution *my answer* infinite solutions no solution
*Tuesday, September 30, 2014 at 7:08pm*

**Math Help **

Which pair(s) of functions are inverses? There may be more than one correct answer. a.) f(x) = x - 12, g(x) = x + 12 b.) f(x) = 3x, g(x) = 1/3x c.) f(x) = 4x, g(x) = -4x d.) f(x) = 2x + 1, g(x) = 2x - 1 My answer: B & C
*Tuesday, September 30, 2014 at 7:04pm*

**Math**

1.) What is the inverse of the relation (3, -1), (2. 5), (-4, -4)? 2.) What is the inverse of the relation (1, -3), (3, 5), (6, -2)?
*Tuesday, September 30, 2014 at 7:03pm*

**Math **

What is 145 over 16 in simplest form? 29/2 * 5/8 = 145/16 = ?? PLEASE HELP MMEEEE DX
*Tuesday, September 30, 2014 at 7:02pm*

**Math Pre-Calc/Trig**

If 11 square meters of tile are available to make a rectangle whose width must be 6 meters less than its length, what would be the dimensions of the rectangle?
*Tuesday, September 30, 2014 at 7:01pm*

**8th grade Math**

At 2pm the temperature is 22 degrees, by 4am it is negative 7 degrees. We think the answer in the change of temperature is 22 degrees am I right?
*Tuesday, September 30, 2014 at 6:51pm*

**Math**

This is a bonus question. If the modes of a problem are13 and15 and the mean and the median are 15 how do you come up with the other numbers
*Tuesday, September 30, 2014 at 6:17pm*

**math**

how much fuel will all of your familys vehicles hold if they are completely full Explain
*Tuesday, September 30, 2014 at 6:04pm*

**Math z-scores**

find the z-scores for which 92% of the distribution's area lies between -z and z
*Tuesday, September 30, 2014 at 6:01pm*

**Math (What Do I Do)**

Choose the best graph for the given situation. Copy the graph and label the axes with the variables give in parenthesis (the first variable goes on the y axis and the second variable on the x axis). 1.Karina walked from home to the library, did some homework, then walked back...
*Tuesday, September 30, 2014 at 5:59pm*

**Math**

4(2x - 3) - 4x (answer all that apply) 4x – 12 *my answer* 3x – 4 *my answer* 3(2x – 6) 4(x – 5)
*Tuesday, September 30, 2014 at 5:45pm*

**4th grade math**

Danielle received $32 for her birthday. Three years ago, she received 1/4 as much. How much did Danielle receive three years ago?
*Tuesday, September 30, 2014 at 5:28pm*

**math**

(3r-5)(x+3)
*Tuesday, September 30, 2014 at 5:22pm*

**math**

Most Americans throw away about 1365 pounds of trash each year. Is it reasonable to estimate that Americans throw away over 10000 pounds of trash in 5 years? Explain.
*Tuesday, September 30, 2014 at 4:47pm*

**Math Questions**

1.) What is the inverse of the relation (3, -1), (2. 5), (-4, -4)? 2.) What is the inverse of the relation (1, -3), (3, 5), (6, -2)?
*Tuesday, September 30, 2014 at 4:42pm*

**math models**

The Sears Tower in Chicago is 1454 feet high. Sketch and find the angle of elevation from a point 750 feet from the base to the top of the tower. Relate your answer to the nearest tenth. a. 62.7º b. 27.3º c. 31.1º d. 58.9º
*Tuesday, September 30, 2014 at 4:37pm*

**4-- math questions**

1. Simplify this expression: 6d + 11 – 3d + 4. 3d 17d + 7d 3d + 15 9d + 15 2. Name the coefficients in this expression: 7a + 3b + 9. 7 and 3 7, 3, and 9 7a and 3b 7a, 3b, and 9 3. Name the like terms in this expression: 4c + 12 + 3c + 2b. 4c, 3c, and 2b 4c and 2b 4c and ...
*Tuesday, September 30, 2014 at 4:20pm*

**Math**

2. What is the selling price of a $12,543 boat if a $758 discount is given? A. $11,758 B. $12,785 C. $11,785 D. $12,758 I think it is C.
*Tuesday, September 30, 2014 at 3:48pm*

**Math**

Subtract the fractions and write your answer in lowest terms. 4/5-3/8 A. 1/40 B. 1 7/4 C. 7/10 D. 17/40
*Tuesday, September 30, 2014 at 3:23pm*

**math...**

Add the fractions and write your answer in lowest terms. 2/5+1/9 A. 1/15 B. 23/45 C. 3/14 D.19/45 B? Thanks
*Tuesday, September 30, 2014 at 3:17pm*

**Math**

Find the LCD of 3/5 and 1/6. A. 5 B. 6 C. 11 D. 30 I choose D am I right? Thanks
*Tuesday, September 30, 2014 at 3:08pm*

**Math**

I wanted to double check that I am correct on the work area and answers please. 1.Given f(x)=x+2 and g(x)= 3x-4. Find (f+g). Work: (x+2) + (3x-4) Answer: 4x-2 2.Given f(x)=x+2 and g(x)=3x-4. Find (f*g). Work: (x+2)(3x-4) Answer: 3x² +2x-8 3.Given f(x)=x+2 and g(x)=3x-4. ...
*Tuesday, September 30, 2014 at 1:50pm*

**Math **

4(2x + 3) = 2(3x - 4) one solution infinite solutions * my answer* no solution 6 - a = 1/3(9a - 18) one solution * my answer* infinite solutions no solution 3(4x - 3) - 7x = 5x - 9 one solution infinite solutions *my answer* no solution 4(2x - 3) - 4x (answer all that apply) ...
*Tuesday, September 30, 2014 at 1:50pm*

**MATH HELP PLEASE**

1. What is the product of (5.1 × 10^3) • (3.2 × 10^3)? (1 point) 16.32 × 10^6 1.632 × 10^7 16.32 × 10^9 1.632 × 10^10 2. What is the product of (7.28 × 10^-2) • (9.1 × 10^-2)? (1 point) 6.6248 × 10^-3 66.248 &...
*Tuesday, September 30, 2014 at 1:35pm*

**Math**

Determine if the conditional statement is true. If a shape is a square, then it will have four sides. True?
*Tuesday, September 30, 2014 at 1:34pm*

**math**

83 3rd graders 115 4th graders 150th graders all the 5th graders will be on one side and all the 4th graders will be on the other side the 3rd graders will be split up so that the two sides will have equal number of student how many 4th graders ?how many 3rd graders will be ...
*Tuesday, September 30, 2014 at 12:08pm*

**Math**

1.)which two sq roots are used to estimate 5? a.)1 & 2 b.)2 & 4 ****** c.)4 & 9 d.)9 & 16 2.)which two sq roots are used to estimate 43? a.)25 & 36 b.)36 & 49***** c.)49 & 64 d.)25 & 64 3.)an estimate for the sq root of -66 is? a.)-6 b.)-7 c.)-8***** d.)-9 4.)an estimate for ...
*Tuesday, September 30, 2014 at 11:40am*

**Math Gr.12**

h=-4.9t^2+29.4t what is the rocket's maximum height? (think vertex)
*Tuesday, September 30, 2014 at 9:39am*

**College Prep Math 4**

The formula is S=2 times the square root of 5 times L. S equals the estimated speed of a car and L equals the length of the skid marks prior to the accident. 100=2(square root of 5x) I have no idea how to solve this
*Tuesday, September 30, 2014 at 9:24am*

**Math Gr 12**

A model rocket is shot straight into the air. Its height in meters a "t" seconds is given by h=-4.9^2+29.4t. a) What is the rocket's initial height? c)When does the rocket reach the ground?
*Tuesday, September 30, 2014 at 9:02am*

**math- pre calc/trig**

Find the length of each side of a square if the diagonal is 7(square root 2)? How do I solve or set up this problem?
*Tuesday, September 30, 2014 at 8:05am*

**math exponential function**

if 450,ooo is invested at 12% compounded semiannually .When will the amount of investment be 477,000?
*Tuesday, September 30, 2014 at 4:11am*

**math**

P is the product ,n is the consecutive term of geometric progression, s is tje sum of their reciprocal then(S/R)n is equal a) p b) p2 c) p3 d) pn
*Tuesday, September 30, 2014 at 2:47am*

**Math**

Is -2 an even number?
*Tuesday, September 30, 2014 at 1:07am*

**Math **

I wanted to double check my work. I am trying to find the domain: 1. f(x)= x+5 Answer: No Domain 2. f(x) = 1 X+5 Work: x+5≠0 X=-5 Answer: (-∞,-5) ᴜ (-5,∞) 3. f(x)= √x+2 Work: x+2 ≥ 0 x ≥ -2 Answer: [-2,∞)
*Tuesday, September 30, 2014 at 12:35am*

**Math**

A resultant vector has a magnitude of 25m?s with an angle of 20 degrees counterclockwise of east. draw the resultant on a coordinate plane, Find the x-component. Find the y-component
*Tuesday, September 30, 2014 at 12:14am*

**math**

The greatest recorded temperature ranges in the world are around the "cold pole" in Siberia. Temperatures in Verkhoyansk have varied from -94 degrees Fahrenheit to 98 degrees Fahrenheit. What is the difference between the high and low temperatures in Verkhoyansk?
*Monday, September 29, 2014 at 11:41pm*

**Math**

is -3.444,-3.4222,-|3.4|,-3 3/7 from least to greatest correct? if not plz esplane
*Monday, September 29, 2014 at 10:37pm*

**Math**

36+81=____(____+____)
*Monday, September 29, 2014 at 10:21pm*

**math**

Mr snider is tiling a floor .The floor is 16 tiles long and 5 toles wide.How many tiles are in the border section?
*Monday, September 29, 2014 at 10:03pm*

**Math**

Posted by NEED HELP on Monday, September 29, 2014 at 9:12pm. Have three problems and I'm really confused how to solve/simplify 1. 4/3+square root of 5 2. -4/-4+4square root of 2 3. 1/1+ square root of 2
*Monday, September 29, 2014 at 9:57pm*

**Math**

Factor Completely 8y^5+12y^3+4y
*Monday, September 29, 2014 at 9:52pm*

**Math**

Everyday Ms. Twinkle walks around a park near her house. The park is in the shape of rectangle 2 mi long and 1 3/10 mi wide. How far does she walk?
*Monday, September 29, 2014 at 9:33pm*

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