Friday

December 19, 2014

December 19, 2014

**Branches of Math**

**Recent Math Questions**

Post a New Question | Current Questions

**math!!**

a high school has a student reduction and lost 1/10 of its students. If 198 of its students were left after the reduction. How many students were there to start with.
*Tuesday, November 25, 2014 at 1:25pm*

**math **

find a value for x so that 28/12 = -7/x x=?
*Tuesday, November 25, 2014 at 1:22pm*

**Math... Stuck... A little help?**

x cube plus kx plus 9=0 I took it as: x^3+kx+9=0 I answered: If so......... x^3+kx+9=0 Subtract 9 from both sides (Somenoe correct me if I'm wrong, please) which looks like: x^3+kx+9-9=0-9 Now the best part.... finding variables x^3+kx=9 x^3+(k•x)=9 Hmmm... x^3= (x&#...
*Tuesday, November 25, 2014 at 1:15pm*

**math**

the number of professors in a collage is P and the number of students is S and there are 15 times as many students as professors. write the answer as an algerbra equation.
*Tuesday, November 25, 2014 at 1:08pm*

**Math. (Check Answers) STUCK**

HI, I'm stuck on two questions(: Round the number to the thousandths place. 97093.113469 Is it 97093.113 < -- ? 97093.112 97093.114 97000 Without multiplying, determine the sign of the product. (19)(-2)(37)(-0.8)(112) Postive Negative <-- ? The product is zero
*Tuesday, November 25, 2014 at 12:30pm*

**math**

x cube plus kx plus 9=0 give me answer
*Tuesday, November 25, 2014 at 12:23pm*

**Math**

1. What value for x makes the sentence true? 7x = 1 0 6 3 2
*Tuesday, November 25, 2014 at 11:42am*

**easy math **

-5.4 ÷ 0.9 = -6.0 < --- ? this one or -0.6 0.6 6.0
*Tuesday, November 25, 2014 at 11:26am*

**math**

a 154 lb person burns 420calories per hour riding an exercise bicycle at a rate of 15 mi/hr write a function rule to represent the total calories burned over time by that person.
*Tuesday, November 25, 2014 at 10:10am*

**math**

John bought a total of 30 white and brown pens for a total of $32. The cost of each white pen is 70 cents more than the cost of each Brown pen. Which would be the possible value of the cost of each Brown pen( in cents)? Please help me in forming a equation.
*Tuesday, November 25, 2014 at 6:26am*

**math**

Simplify completely quantity 6 x squared minus 54 plus 84 over quantity 8 x squared minus 40 x plus 48 divided by quantity x squared plus x minus 56 over quantity 2 x squared plus 12 x minus 32
*Tuesday, November 25, 2014 at 6:19am*

**math**

The cost of printing the first fifteen hundred copies of a book is $1500. It costs y dollars to print each subsequent copy. The cost of printing the first 7500 copies of the book is $7080. Find Y. Please explain how to solve it.
*Tuesday, November 25, 2014 at 5:38am*

**business math **

Molly Ellen, bookkeeper for Keystone Company, forgot to send in the payroll taxes due on April 15. She sent the payment November 8. The IRS sent her a penalty charge of 8.80% simple interest on the unpaid taxes of $3,600. Calculate the penalty. (Remember that the government ...
*Tuesday, November 25, 2014 at 1:03am*

**integrated math**

A 150 yard pipe is cut to provide drainage for two fiekds. If the length of one piece us 3 yards less than twice the length of the second piece, what are the lengths of the two pieces?
*Tuesday, November 25, 2014 at 12:26am*

**math **

Determine the value of k for which the direction vectors of the lines x-1/k = y-2/2 = z+1/k-1 and x+3/-2 = z/1, y=-1 are perpendicular.
*Monday, November 24, 2014 at 10:33pm*

**Math with business apps**

How much should be invested at 6% compounded monthly so that the investment will be worth $20,000 in six years?
*Monday, November 24, 2014 at 9:43pm*

**Math with business apps**

You invest $5000 at 3% compounded monthly for 15 years. How much interest will you earn?
*Monday, November 24, 2014 at 9:42pm*

**Math with business apps**

Tom invested $7,000 at 6.5% interest compounded monthly. How much will be in this account after 18 months?
*Monday, November 24, 2014 at 9:40pm*

**Math 3371**

In a certain year, 26% of all teenagers in the United States had checking accounts. Your bank, TeenChex Inc., is interested in targeting teenagers who do not already have a checking account. (a) If TeenChex selects a random sample of 3,000 teenagers, what number of teenagers ...
*Monday, November 24, 2014 at 9:36pm*

**MATH!!**

Joe and Susan invested $1500 at Bank of America in 2000, at 4% compounded quarterly. In the year 2005 they moved to another city and took the total money from their investment added $500 and invested in at Bank Bravo, at 5% compounded quarterly. a) What is the value of this ...
*Monday, November 24, 2014 at 9:07pm*

**MATH!**

Barbara invested $12,300 at the Midtown Credit Union at 6% compounded monthly for 7 years. What is the effective rate of this investment?
*Monday, November 24, 2014 at 9:05pm*

**Math**

chris cuts half a rectangular lawn, 40m by 30m, by mowing strips of equal width around the perimeter. Jerri cuts the small rectangle left. How wide a stripe does Chris cut so they share the work equally
*Monday, November 24, 2014 at 8:48pm*

**Math**

Student budgeted a $25 a month for phone service. If the telephone company charges $18 a month for basic service and $.05 a minute for each long distance call, how many minutes can be spent on long distance calls each month?
*Monday, November 24, 2014 at 8:45pm*

**Algebra math Question**

Find the dimensions of the rectangle meeting the specified conditions. The perimeter is 352 feet and the length is 4 1/2 times the width. width ft length ft
*Monday, November 24, 2014 at 8:43pm*

**Algebra math Question**

Find the dimensions of the rectangle meeting the specified conditions. The perimeter is 20.4 millimeters and the length is 2.4 times the width. (Round your answers to one decimal place.) width mm length mm
*Monday, November 24, 2014 at 8:29pm*

**Math - ratio**

Mr. Rahim had the same amount of money in his three bank accounts at first. He deposited $44 into account b and $ 80 into account c. In the end, the ratio of the amount of money in ac!@#$%^& a to the amount of money in account c was 2:7. How much money was there in account b ...
*Monday, November 24, 2014 at 8:17pm*

**math**

36-9/{(0.24*5)+(0.66*5)}
*Monday, November 24, 2014 at 8:07pm*

**Math**

A worker uses 4gray tiles for every 5blue tile That he uses .if he uses 60gray tiles how many blue tiles does he use
*Monday, November 24, 2014 at 8:01pm*

**math problem (please help)**

What are the dimensions of a rectangular tract of land if its perimeter is 70 kilometers and its area is 300 square kilometers? km (smaller value) akm (larger value)
*Monday, November 24, 2014 at 7:58pm*

**math**

A cone is made from the figure shown by joining the straight edges and securing them with tape, calculate the angle of inclination, to the nearest tenth of a degree, for the side of the cone.
*Monday, November 24, 2014 at 7:55pm*

**math!!**

mike and sam begin saving money at the same time. mike plans to save $3 a month and sam plans to save $8 a month. After how many months will sam have $25 more than mike?
*Monday, November 24, 2014 at 7:32pm*

**Math I need help ASAP! I'm getting timed**

Which ratios form a proportion? 1. 4/12 , 6/8 2. 16/12 , 3/4* 3. 3/2 , 15/14 4. 10/16 , 5/8 Which ratio forms a proportion with 9/15? 1. 6/10 2. 16/21 3. 36/50 4. 45/70 A textbook weighs 2.5 pounds. How many kilograms does the textbook weighs? Round your answer to the nearest ...
*Monday, November 24, 2014 at 7:05pm*

**math**

Ms.Johnson gives twice as much daily homework as Mr. Beach. Mr.Beach gives out 10 minutes less than Mrs.Rodriguez. if Mrs.Rodriguez gives 35 minutes of homework,what is the total amount of homework given by the three teachers? ---- So do you just half it so,Mr.Beach gives 5,...
*Monday, November 24, 2014 at 7:01pm*

**MATH**

Janet dreams to go on vacation in three years. How much should she invest now so that she will have $15,000 by that time if the account earns 1 3/8% compounded quarterly?
*Monday, November 24, 2014 at 6:58pm*

**MATH**

{56.0/25}+1-100=
*Monday, November 24, 2014 at 6:50pm*

**math calculus**

if i,j,k are the standard unit basic vectors, in 3 space, determine the value of k dot(j-3k)+(i-4k) dot (i-4k)-8 |i cross -k| (Simplify without using components)
*Monday, November 24, 2014 at 6:48pm*

**Math**

You invest $5,000 at 3% monthly for 15 years. How much interest will you earn?
*Monday, November 24, 2014 at 6:43pm*

**Math**

Tom Invested $7,000 at 6.5% interest compounded monthly. How much will be in this account after 18 months?
*Monday, November 24, 2014 at 6:31pm*

**math**

change the following mixed numbers to a fraction in the forma/b were a and b are integers 3 5/6 ?
*Monday, November 24, 2014 at 6:15pm*

**math**

arrange in order smallest to largest 0.8315, 0.75 ,0.7024 is this right 0.75 0.7024 0.8315
*Monday, November 24, 2014 at 6:06pm*

**math **

The ratio of boys to girls on the bus is 20/15
*Monday, November 24, 2014 at 6:04pm*

**MATH**

In a fraternity with 38 members , 18 take math, 5 take both math and literature and 8 take neither math or literature. how many take literature but not math? I came up with 16 is that correct or am i lost ?
*Monday, November 24, 2014 at 6:03pm*

**Math**

As a savings plan for college, when their son Bill was born, the Johnson's deposited $10,000 in an account paying 4% compounded quarterly. How much is this account when Bill is 18 years old?
*Monday, November 24, 2014 at 6:01pm*

**MATH**

I SUCK HELP!!!!
*Monday, November 24, 2014 at 5:53pm*

**Math Help!**

Mrs. Miller sells a house for $179,000. If she earns a commission of 6%, how much money does she earn? Write a porportion and show your work. My answer 179,000/100=x/6 107400=100x 10,740=x Am I right? Thank you
*Monday, November 24, 2014 at 5:15pm*

**math**

Jane had $7 and her sister had $2. Their parents gave each of them an equal amount of money. Then, Jane had twice as much money as her sister. How much money did their parents give each of them
*Monday, November 24, 2014 at 5:05pm*

**Math Help!**

30% of 60 is what number? A. 15 B. 30 C. 18 D. 40 Is the answer C? Thank you
*Monday, November 24, 2014 at 5:04pm*

**math physics**

What frequency is heard by an observer who hears the 450 Hz siren on a police car traveling at 35 m/s away from her? Assume that the velocity of sound in air is 345 m/s. Is this the correct? 450*345/(345+35) =408Hz
*Monday, November 24, 2014 at 5:04pm*

**Math Help!**

What percent of 50 is 15? A. 4% B. 25% C. 30% D. 15% Is the answer C? Thank you
*Monday, November 24, 2014 at 5:00pm*

**Math**

Probability Question: A college student claims that she can identify 3 different types of cheese by taste. An experiment is set up to test her ability. She is blindfolded and given three pieces of cheeses, each representing a different brand. What is the probability that she ...
*Monday, November 24, 2014 at 4:52pm*

**Math Help!**

Which proportion can be used to solve the following percent problem? What is 50% of 70? A. x/70=50/100 B. x/50=70/100 C. 50/70=x/100 D. 70/x=50/100 Is the answer B? Thank you
*Monday, November 24, 2014 at 4:50pm*

**Math Help!**

The bill at a restaurant is $100, and Mrs. Johnson wants to leave a 15% tip. Approximately how much money should she leave? A. About $5.00 B. About $10.00 C. About $15.00 D. About $20.00 Is the answer C? Thank you
*Monday, November 24, 2014 at 4:43pm*

**math**

if the perimeter of an equilateral is 24 inches find a side of the triangular
*Monday, November 24, 2014 at 4:43pm*

**math**

a car traveling 8 m/s suddenly brakes to a complete stop. THe stopping time was .36 seconds. what is the acceleration of the car?
*Monday, November 24, 2014 at 4:39pm*

**Math Help!**

Estimate 48% of $20.00. A. About $12.00 B. About $11.00 C. About $15.00 D. About $10.00 Is the answer D? Thank you
*Monday, November 24, 2014 at 4:37pm*

**Math Help!**

ALice plays basketball. In one game she shoots 21 free throws and makes 81.25% of them. Estimate how many free throws she makes. A. About 16 B. About 2 C. About 20 D. About 14 Is the answer A? Thank you
*Monday, November 24, 2014 at 4:33pm*

**Math**

Find the volume of a right circular cone with base diameter 12.0 m and slant height is 10.0m . Round to the nearest whole
*Monday, November 24, 2014 at 4:24pm*

**math**

the find the volume of a pyramid that has a slant height of 176cm and a square base with area 9.00m
*Monday, November 24, 2014 at 4:03pm*

**Math Physics**

What is the wavelength in metres of an electromagnetic wave with a frequency of 10^14/s?
*Monday, November 24, 2014 at 3:14pm*

**Math Physics**

What is the wavelength of an electromagnetic wave with frequency 50.0 MHz? Am I starting this problem like this? 3.00*10^8/50*10^6 =6*10^12
*Monday, November 24, 2014 at 1:58pm*

**Math**

Factor 2y^4+y^2-10y+5 Please help!thank you
*Monday, November 24, 2014 at 11:27am*

**MATH**

Al saves pennies . He agrees to give 1/3 of his pennies to Bev if she would give 1/3 of what she got from Al to Carl and if Carl in turn would give 1/3 of what he got from Bev to Danni. Bev, Carl and Danni agreed and recived 9 pennies. hOW MANY PENNIES DID aL INTINALLY HAVE?
*Monday, November 24, 2014 at 11:26am*

**math**

Caroline runs 3 and one half miles in 221 over 4 minutes. How many miles does she run per minute?
*Monday, November 24, 2014 at 11:19am*

**business math**

Family Flowers employs 17 people, of whom 14 earn gross pay of $640 each and 3 earn gross pay of $720 each on a weekly basis. What is the employer<s share of total social security and Medicare taxes for the first quarter of the year? The tax rate for security is 6.2% and ...
*Monday, November 24, 2014 at 11:18am*

**math**

The speeds of two trains A and B are in the ratio of 5:6. A takes 36 minutes more than B to reach the destination.what is the time taken by A to reach the destination to cover the same distance?
*Monday, November 24, 2014 at 10:21am*

**math**

A and B together can make a wall in 60 days. A has worked for 12 days, B finishes the remaining work in 36days. How many days will B take to finish the whole work alone?
*Monday, November 24, 2014 at 10:16am*

**math**

On a highway, lighting poles are 50m apart. How many lighting poles will be passed by a bus that is moving at a speed of 45kmph in 4 hours.
*Monday, November 24, 2014 at 10:12am*

**Math**

Which ratios does NOT form a proportion? 1. 24/96 , 27/108 2. 17/102 , 12/70 3. 21/51 , 35/85 4. 45/75 , 63/105 Which ratios form a proportion? Use cross products to test each pair. 1. 9/17 , 27/50 2. 12/35 , 24/75 3. 15/55 , 33/ 121 4. 12/35 , 20/70 Which ratio forms a ...
*Monday, November 24, 2014 at 10:07am*

**Math**

Given TriangleABC with a = 9, b = 15, and m<A= 28 degrees, find the number of distinct solutions. I got two solutions. Not sure if I am correct though.
*Monday, November 24, 2014 at 10:03am*

**Math**

Given TriangleABC with a = 9, b = 15, and m<A= 28 degrees, find the number of distinct solutions. I got two solutions. Not sure if I am correct though.
*Monday, November 24, 2014 at 10:03am*

**Math**

Given TriangleABC with a = 9, b = 15, and m<A= 28 degrees, find the number of distinct solutions. I got two solutions. Not sure if I am correct though.
*Monday, November 24, 2014 at 10:02am*

**Math**

Determine the linear velocity of an object with an angular velocity of 8.1 radians per second at a distance of 10 centimeters from the center. Use pi. Round the answer to the nearest tenth. I got 47, is this correct?
*Monday, November 24, 2014 at 9:54am*

**math,trigonometry**

a 35-foot long ladder is leaninig against the wall of a building. how far from the ground is the top of the ladder and how far from the base of the buildings is its foot if it makes a 20° angle with the wall ?
*Monday, November 24, 2014 at 8:43am*

**math **

Carina has twice as many quarters as dimes. If she has $3.60, how many quarters does she have?
*Monday, November 24, 2014 at 6:30am*

**math**

Ron has $1.35 in dimes and quarters in his pocket. If there are twice how many quarters does he have?
*Monday, November 24, 2014 at 4:52am*

**math**

Ron has $1.35 in dimes and quarters in his pocket. If there are twice as many dimes in his pocket as quarters, how many quarters does he have?
*Monday, November 24, 2014 at 4:50am*

**math**

A letter is chosen at random from the word EXTRATERRESTRIAL. Find the probability of the given event. (a) The letter A is chosen.
*Monday, November 24, 2014 at 1:26am*

**math**

Kaylin mixed two liquids. One container held 7/8 cup and the other held 8/10 cup. What is the total amount of the mixture? My answer is 1 cup 4/5 of mixture.
*Sunday, November 23, 2014 at 11:32pm*

**Math (adding fractions)**

Sheila spent x hours studying on a Tuesday and 1/4 hour studying on Thursday. What was the total amount of time in hours Sheila spent studying if x = 2/4? Do I add 1/4 + 2/4?
*Sunday, November 23, 2014 at 11:26pm*

**math**

1/3 / 7/9 =1/3 * 9/7 =9/21 is this right??
*Sunday, November 23, 2014 at 8:39pm*

**math**

1 3/5 - 5/6 =8/5 - 6/5 =2/5 or is it =1/3/5 - 5/6 =48/30 - 25/30 =23/30 I don't know which one is right. Pleas e help!
*Sunday, November 23, 2014 at 8:20pm*

**math**

3/8 + 2 1/2 =3/8 + 5/2 =8/10 =4/5
*Sunday, November 23, 2014 at 8:15pm*

**math**

5/7 *9/10 =63/70 =9/10
*Sunday, November 23, 2014 at 8:11pm*

**math,trigonometry**

From a tower 36m high situated on one side of a river, the angle of desperation of the opposite side of the river is 25 degree. FInd the width of the river?
*Sunday, November 23, 2014 at 8:10pm*

**math**

5/7 * 9/10 = 50/70 * 63/70 =3150/70 =45
*Sunday, November 23, 2014 at 8:07pm*

**math**

4/5 * 3/4 = =16/20 * 15/20 =240/20 =12 is this right?
*Sunday, November 23, 2014 at 7:51pm*

**Trig- math**

Find the area of a triangle if the sides of the triangle have the lengths 849mi, 930mi, and 1301mi. Here's my work: a=849 b=930 c=1301 A=.5(849)(930)sinA sin A = 394,785 mi^2 (this number doesn't seem right to me, can you explain to me what I did wrong)?
*Sunday, November 23, 2014 at 7:25pm*

**Math (trigonometry)**

Hi, I need help with these problems, I'm not sure where to start. The book's examples are different. Thanks in advance!! 1.) To find the distance AB across a river, a distance BC of 472m is laid off on one side of the river. It is found that B=108.1 degrees and C= 17.9...
*Sunday, November 23, 2014 at 6:31pm*

**Basic Math (Check my answer)**

Which of the following is equal to 1/6 ÷ 1/18? Assume the shapes are rectangular. Describe another situation that this quotient models. A) The area of a planter that is 1/6 yard wide and 1/18 yard long. B)The width of a 1/18-square-meter flower bed that is 1/6 meter ...
*Sunday, November 23, 2014 at 6:10pm*

**Math**

How do you graph a rectangle and find its area if: A(1,-3) B(1,3) C(-9,3) D(-9,-3)
*Sunday, November 23, 2014 at 5:43pm*

**6th Grade Math Homework Check**

In the first hour after opening, a coffee shop used 5 2/3 pounds of unflavored coffee. The shop used 2 1/2 times as much flavored coffee as unflavored. How many pounds of flavored coffee did the shop use? My Answer: 14 1/6
*Sunday, November 23, 2014 at 5:40pm*

**math**

The atmospheric pressure P in pounds per square inch (psi) is given by P = 14.7 e−0.21 awhere a is the altitude above sea level (in miles). If a city has an atmospheric pressure of 11.11 psi, what is its altitude? (Recall that 1 mi = 5,280 ft.
*Sunday, November 23, 2014 at 3:55pm*

**math**

A jar contains 133 pennies. A bigger jar contains 1 2/7 times as many pennies. What is the value of the pennies in the bigger jar
*Sunday, November 23, 2014 at 3:41pm*

**Math**

how to write 4(x+2)+3x+2(x-y) in the distribt. property form
*Sunday, November 23, 2014 at 3:39pm*

**math**

Two sides of a rectangular fence are 5 5/8 feet long The other two sides are 6 1/4 feet long. what is the perimeter
*Sunday, November 23, 2014 at 3:37pm*

**Math **

32(2)^2x-12(2)^x+1=0 I've spent too much time trying to figure this out. Please help.
*Sunday, November 23, 2014 at 3:13pm*

**math**

3/4 of seats in a concert hall were occupied. The ratio of adults to children was 7:3. If 90 more adults attended the concert, the number of adults would be 3 times of number of children. How many seats were in the concert hall?
*Sunday, November 23, 2014 at 2:29pm*

**math**

what are the steps in determining how to maximize the area of a rectangle given a specific perimeter?
*Sunday, November 23, 2014 at 1:54pm*

**Math**

The temperature on one day in January for Phoenix, AZ, is 60 degrees Fahrenheit. On the same day in Barrow, AK, the temperature is -29 degrees Fahrenheit. What is the difference between these two temperatures?
*Sunday, November 23, 2014 at 12:00pm*

**math**

WHEN MR. LOWE RETURN FROM HIS FISHING TRIP, HIS STUDENTS INQUIRED AS TO THE LENGTH OF HIS PRIZE CATCH. MR. LOWE ANSWERED. "THE HEAD MEASURED 9 INCHES." "THE TAIL WAS AS LONG AS THE HEAD AND HALF THE BODY." THE BODY WAS AS LONG AS THE HEAD AND TAIL." ...
*Sunday, November 23, 2014 at 11:19am*

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