Friday

September 19, 2014

September 19, 2014

**Branches of Math**

**Recent Math Questions**

Post a New Question | Current Questions

**Math**

In the number 436,621, which places contain digits where one digit is ten times as great as the other ?
*Wednesday, September 17, 2014 at 7:04pm*

**math**

I have a 15ft board I need to cut into 2 1/8 inch pieces how many can I cut
*Wednesday, September 17, 2014 at 6:57pm*

**math**

blue rectangular tile and red rectangular tile are similar. the blue tile has a length of 10 inches and a perimeter of 30 inches.the red tile has a length of 6 inches. whats is the perimeter of the red tile?
*Wednesday, September 17, 2014 at 6:56pm*

**math**

Which variable expression represents the word phrase? six decreased by the sum of a number and two. A- (m + 2) - 6 B- 6 - (m - 2) C- (m - 2) + 6 D- 6 - (m + 2)
*Wednesday, September 17, 2014 at 6:51pm*

**4th grade math**

GCM OF 12 and 20. Please explain
*Wednesday, September 17, 2014 at 6:51pm*

**math**

Which word phrase can be modeled by the expression? Choose all that apply. 8 - 3n A- eight decreased by the product 3 and a number B- the difference of 8 and the quotient of 3 and a number C- the difference of eight and the product of 3 and a number D- eight less than 3 times ...
*Wednesday, September 17, 2014 at 6:45pm*

**math**

The length of an arc of a circle equals 1/8 of the circle's circumference. What is the diameter of the circle if the length of the arc is 3.14?
*Wednesday, September 17, 2014 at 6:40pm*

**math**

Michelle is now 50 miles ahead of John. Michelle is traveling at a constant rate. John is traveling in the same direction, at a rate 10 miles per hour faster than Michelle. In how many hours will John catch up to Micelle?
*Wednesday, September 17, 2014 at 6:36pm*

**6th grade math**

Hi I'm a parent and I'm trying my best to help my son but I need help. The problem is... Find two positive decimals a and b that make the following statement true. Then find two positive decimals a and b that make the statement false. If a < 1 and b < 1, then a ...
*Wednesday, September 17, 2014 at 6:16pm*

**math**

Luke is making pancakes. The recipe calls for 0.5 quart of milk and 2.5 cups of flour. He has 3/8 quart of milk and 18/8 cups of flour. Luke makes the recipe with the milk and flour that he has. Explain his error.
*Wednesday, September 17, 2014 at 6:10pm*

**Math**

12+4n/3 = 8 Not multiple choice.. trying to find n. My answer is 7 9a - 3(a -6) = -6 Not multiple choice.. I'm not quite sure how to do this The width of a rectangle is 6 in. less than its length. The perimeter is 68 in. What is the width of the rectangle? Not multiple ...
*Wednesday, September 17, 2014 at 6:01pm*

**Math**

GCF of 12
*Wednesday, September 17, 2014 at 6:00pm*

**math**

Sarah has 10 stuffed animals. Explain two different ways she can group the stuffed animals so each group has the same number and no ... number and no stuffed animals ...
*Wednesday, September 17, 2014 at 5:44pm*

**Math help. **

1. 1 • 12 numerical expression variable expression; a is the variable variable expression; there is no variable variable expression; l is the variable 2. f ÷ 7 variable expression; there is no variable numerical expression variable expression; g is the variable ...
*Wednesday, September 17, 2014 at 5:39pm*

**science/math**

If a car can go from 0 to 60mi/hr in 8.0 seconds, what would be its final speed after 5.0 seconds if its starting speed were 50mi/hr? dont know what equation to use. please help
*Wednesday, September 17, 2014 at 5:31pm*

**math**

An automobile rental angency charges $170 for 5 days for a certain model car. What is the unit price in dollars per day? why is it 59/3gal
*Wednesday, September 17, 2014 at 5:01pm*

**math**

Find the maximum and minimum value of the quadratic function g(x) = 2x^2 + 6x + 3
*Wednesday, September 17, 2014 at 4:45pm*

**math**

An order of potato skins is sold for $3.95. The individual items to prepare this order cost: $0.89 for the potato; $0.30 for cheese; $0.15 for sour cream; and $0.08 for bacon. An order of cheese fries is sold for $3.75. The items to prepare this order cost: $0.65 for the fries...
*Wednesday, September 17, 2014 at 4:20pm*

**Math**

Write each integer for each exercise. (4) -|-5| |-7|
*Wednesday, September 17, 2014 at 3:49pm*

**Create math equation**

Anthony leaves kingstons at 2:00 pm and drives to queensville, 160mi distant, at 45 mph. At 2:15 pm Helen leaves queensville and drives to kingston at 40mph. At what time do they pass each other on the road?
*Wednesday, September 17, 2014 at 3:06pm*

**Math**

An airplane took off and reached an altitude of 10,000ft in 20min. How many ft per min, on average, did the airplane climb?
*Wednesday, September 17, 2014 at 3:02pm*

**math**

The perimeter of a rectangle poultry farm is 38 meters if 3 meters are subtracted from its length as well as the breadth the length will be two times the breadth find the area of the farm
*Wednesday, September 17, 2014 at 1:49pm*

**math**

kate davidson signed a simple discount note for $9000. the discount rate is 5%, and the term of the note is 18 months. what is the annual percentage yield (apy)?
*Wednesday, September 17, 2014 at 1:35pm*

**math**

what is the effective interest rate of a simple discount note for $2700 at a bank discount rate of 12.25%, for 36 months?
*Wednesday, September 17, 2014 at 1:31pm*

**math**

what is the annual percentage yield (apy) of a simple discount note for $7000 at a bank discount rate of 6% for 3 months?
*Wednesday, September 17, 2014 at 1:28pm*

**Math**

If S1 = 0.7 and S2 = 2.1 in a geometric series, determine the sum of the first 12 terms in the series. Be sure to show all of your work.
*Wednesday, September 17, 2014 at 1:23pm*

**Math**

The sum of the first two terms of an arithmetic series is 15 and the sum of the next two terms is 43. What are the first four terms of the series?
*Wednesday, September 17, 2014 at 1:12pm*

**math**

perform the division 3-8r2+r4 / r2-2
*Wednesday, September 17, 2014 at 1:05pm*

**Math**

Etienne owns a small recycling company that picks up empty glass bottles from restaurants. At the first restaurant, he picks up 50 bottles. At each restaurant after this, he picks up 4 more bottles than he picked up at the restaurant before. Assume that this pattern continues...
*Wednesday, September 17, 2014 at 1:04pm*

**Math (putting the question back up, again)**

- 5/8c = 20 Answer choices: 34 . -32 . -34 . 32 I keep getting -100, I think I'm multiplying something wrong. But my next answer would be -32 because if you did -8/5 x 20 it would equal -32,am I right? -12.8 = 4t *not multiple choice* but my answer is 3.2 because -12.8/4 .
*Wednesday, September 17, 2014 at 12:52pm*

**Math**

What is the sum of the infinite geometric series 15 + 15(1/3)+ 15(1/3)^2 + 15(1/3)^3?
*Wednesday, September 17, 2014 at 12:43pm*

**Math**

The sum of the geometric series 9 + 45 + 225 + 3 515 625 is ?
*Wednesday, September 17, 2014 at 12:41pm*

**Math**

An explicit formula for the general term for the arithmetic sequence 7/4,1, 1/4, -1/2?
*Wednesday, September 17, 2014 at 12:40pm*

**Math**

The first prize in a lottery is $250 000. Each winner chosen after the first is paid 20% as much as the winner before them. a) Determine t1 and r for the geometric sequence that represents this situation. b) Determine an explicit formula for the general term. c) Determine a ...
*Wednesday, September 17, 2014 at 12:38pm*

**math**

The rectangular and polar coordinates of a point are (x, y) and (r, θ), where x = 4 and θ = 38◦ . Determine the value of r.
*Wednesday, September 17, 2014 at 11:41am*

**math**

The rectangular and polar coordinates of a point are (x, y) and (r, θ), where x = 4 and θ = 38◦ . Determine the value of r.
*Wednesday, September 17, 2014 at 11:07am*

**math**

The rectangular and polar coordinates of a point are (x, y) and (r, θ), where x = 4 and θ = 38◦ . Determine the value of r.
*Wednesday, September 17, 2014 at 10:59am*

**math**

How many thousands of people live in Boston ma.if population is 617,594
*Wednesday, September 17, 2014 at 7:23am*

**Math**

In rectangle PQRS, diagonal PR makes a 60 degrees angle with side PS. If PR =10, what is the area of the rectangle?
*Wednesday, September 17, 2014 at 6:39am*

**Math**

Freddy and Frankie want to know their grandmother's age. She tells them that the digits of their age make up her age. She also tells them that their age plus her age total 83. What is the age of the grandmother? Please explain this question step by step.
*Wednesday, September 17, 2014 at 3:29am*

**math**

Jen and Jacob want to put a cement deck around their pool. Use the figure below to calculate the area of the deck. Second, simplify the area if x=4.75. Round to the nearest hundredth.
*Wednesday, September 17, 2014 at 12:27am*

**math**

Line through (0,b) and (10,-5) is perpendicular to the line through (a,0) and (-6,-3). If all ordered pairs (a,b) which make the first sentence of this problem true are graphed, they all lie on a line. Find the equation of this line.
*Wednesday, September 17, 2014 at 12:04am*

**MATH**

4X/5+1/7=8
*Tuesday, September 16, 2014 at 11:48pm*

**Math**

Consider the arithmetic series 7 + 19 + 31 + 43 + 55 + pr004-1.jpg. a) How many terms are less than 1000? (3 marks - show your work) b) How many terms are less than 2000? (3 marks - show your work)
*Tuesday, September 16, 2014 at 11:36pm*

**Math**

Determine the sum of the infinite geometric series 28 + 14/3 + 7/9 + 7/54 ?
*Tuesday, September 16, 2014 at 11:28pm*

**Need Help with Math**

Name three different pairs of fractions that have the same product when multiplied.
*Tuesday, September 16, 2014 at 11:23pm*

**math**

x^3-18x^2+80=0
*Tuesday, September 16, 2014 at 11:14pm*

**math**

¿Cuanto le sobra a la mitad de los 3/8 de 5/6 de 24 para ser igual al exceso de 5/2 sobre 1/4 ?
*Tuesday, September 16, 2014 at 11:09pm*

**Math**

Round two decimals -2x^4+9=3x+5
*Tuesday, September 16, 2014 at 11:05pm*

**math**

Russell planted a flower bed that is 1.6 square meters Jackie planted a flower bed that is 16 tenths square meters. Draw a quick picture to model the two areas
*Tuesday, September 16, 2014 at 10:41pm*

**math**

What does least common multiple mean
*Tuesday, September 16, 2014 at 10:32pm*

**math**

If the area of something is known how do you find the length?
*Tuesday, September 16, 2014 at 10:32pm*

**math**

How do I draw this out I am confused? The bridge forms parabolic arch. The span of the arch is 60 m and its center is 10 m above either end. (1) draw sketch of arch, include x and y axes where the vertex is at the origin. Is 10 m the axis of symmetry? What does it mean by span...
*Tuesday, September 16, 2014 at 10:31pm*

**math**

why are some numbers easier to add than others
*Tuesday, September 16, 2014 at 10:28pm*

**math**

This is the question and what I have so far is under it. "Given the length of a femur, f, in centimetres, a person’s height can be determined using the equation H=2.4f+61.4, where H is the height of the person in centimetres. Suppose this equation has a margin of ...
*Tuesday, September 16, 2014 at 10:27pm*

**math **

The ratio of girls to boys in the junior high band is 5 to 7. At the beginning of the year, there were 72 students in the band. By the end of the year, the ratio of girls to boys was 3 to 4. If there are now 48 in the band, how many girls joined the band during the school year.
*Tuesday, September 16, 2014 at 10:24pm*

**Math**

Betsy is making a flag. she can choose 3 colors out of red, white, blue, and yellow. How many choices does she have?
*Tuesday, September 16, 2014 at 10:24pm*

**math **

How do I draw this out I am confused? The bridge forms parabolic arch. The span of the arch is 60 m and its center is 10 m above either end. (1) draw sketch of arch, include x and y acts where the vertex is at the origin. Is 10 m the axis of symmetry? What does it mean by span...
*Tuesday, September 16, 2014 at 10:19pm*

**math**

The ratio of girls to boys in the junior high band is 5 to 7. At the beginning of the year, there were 72 students in band. By the end of the year the ratio of girls to boys was 3 to 4. If there are now 48 boys in the band how many girls joined the band during the school year?
*Tuesday, September 16, 2014 at 10:10pm*

**6th Grade Math**

Marianne buys 16 bags of potting soil that comes in 5/8 -pound bags. A. How many pounds of potting does Marianne buy? 10 B. If Marianne’s father calls and says he needs 13 pounds of potting soil, will 4 more bags be enough to cover the extra soil needed? Is 10 the correct...
*Tuesday, September 16, 2014 at 9:59pm*

**Math (Ms. Sue!- my new answers)**

My new answers! 3) -4x + 5(x -2) = -16 + 10 *my answer -6* 4) 4.8 + x -5.9 = 3.6 * my answer 4.7* 5) 1/3x + 1/3 (2x - 15) = 3 1/2 * my answer is -3 9/15
*Tuesday, September 16, 2014 at 9:58pm*

**math**

The researcher in exercise 2 decides to conduct the same study using a within- participants design to control for differences in cognitive ability. He selects a random sample of subjects and has them study different material of equal difficulty in both the music and no music ...
*Tuesday, September 16, 2014 at 9:55pm*

**Math**

A doctor writes a prescription for 20 mg of Tobramycin antibiotic saline solution. The solution is to be injected intravenously one time a day. On hand we have a 30 mg/2 ml vial of Tobramycin.
*Tuesday, September 16, 2014 at 9:50pm*

**Math**

The rectangles on a quilt are 4 in. wide and 5 in. long. The perimeter of each rectangle is made by a pattern of green thread. If there are 40 rectangles in the quilt, how much green thread is needed?
*Tuesday, September 16, 2014 at 9:48pm*

**Math**

You have just isolated a new radioactive element. If you can determine its half-life, you will win the Nobel Prize in physic. You purify a sample of 2 grams.One of you colleges steals half of it, and 3 days later you find that 0.1 grams of the radioactive material is still ...
*Tuesday, September 16, 2014 at 9:43pm*

**Math**

A company has determined that the profit, in dollars, it can expect from the manufacture and sale of tennis racquets is given by P = −0.01x2 + 130x − 180,000. How many racquets should the company manufacture and sell to earn a profit of $174,900?
*Tuesday, September 16, 2014 at 9:42pm*

**math**

Area=3x2 +5x -2 FInd length and width of the rectangle
*Tuesday, September 16, 2014 at 9:36pm*

**math**

A and B weigh 156 pounds. A and C weigh 171 pounds. How much do they each weigh if the total weight is 255 pounds?
*Tuesday, September 16, 2014 at 9:28pm*

**Math**

2-(b-a) use a=4, and b = 4
*Tuesday, September 16, 2014 at 9:16pm*

**Math**

5-(-8)
*Tuesday, September 16, 2014 at 9:11pm*

**Math**

160,656 underlined is 1
*Tuesday, September 16, 2014 at 9:07pm*

**math help **

find the ratio of the volume to the surface area of the rectangular prism shown. L= 4x+8 W= x+2 H= 2x+4 please show all your steps please!!
*Tuesday, September 16, 2014 at 9:01pm*

**Math**

a camera's focal length, F, is related to the distance from the subject, S, and the image distanc, I, by the equation 1/S+1/I=1/F Please show all your steps! thanks you
*Tuesday, September 16, 2014 at 8:56pm*

**math**

perform the division 5-7r^2+r^4/r^2-2
*Tuesday, September 16, 2014 at 8:52pm*

**Math**

Confused on these but these are my answers. *Not multiple choice* 1) -18 + 4 + x = 9 - 19 *my answer is -10* 2) 32 - 6x + 7x = -15 + 28 *my answer is 13* 3) -4x + 5(x -2) = -16 + 10 *my answer 4* 4) 4.8 + x -5.9 = 3.6 * my answer 4.7* 5) 1/3x + 1/3 (2x - 15) = 3 1/2 * my ...
*Tuesday, September 16, 2014 at 8:38pm*

**math**

Michelle is now 50 miles ahead of John. Michelle is travelling at a constant rate. John is traveling in the same direction, at a rate 10 miles per hour faster than Michelle. In how many hours will John catch up to Michelle?
*Tuesday, September 16, 2014 at 8:37pm*

**Math**

12+9m=-4(-6m-3) Can some one plz help me and show me how. To do this because I try so many things and got 2different answer
*Tuesday, September 16, 2014 at 8:36pm*

**Math**

Ashley runs around the following track. How many times must she run around the track in order to run a total distance of 4 km? measurements: 100m and 60m
*Tuesday, September 16, 2014 at 8:17pm*

**math**

My 3 digit number has a 4 in the hundreds place.It has a greater digit in the tens place than in the ones place.The sum of the digits is 6.What is my number?
*Tuesday, September 16, 2014 at 8:05pm*

**Pre-Calculus**

Hi! I'm having trouble with this math question; can someone help? Thanks! :) Given the function f(x)=x^2+9, solve. a.) Find f(-3) b.) Find f(x-2)
*Tuesday, September 16, 2014 at 8:01pm*

**math**

Confused!! None of these questions are multiple choice. 1) -18 + 4 + x = 9 - 19 2) 32 - 6x + 7x = -15 + 28 3) -4x + 5(x -2) = -16 + 10 4) 4.8 + x -5.9 = 3.6 5) 1/3x + 1/3 (2x - 15) = 3 1/2 I have to find x for all of them, but I'm not sure what to do first.
*Tuesday, September 16, 2014 at 7:51pm*

**Math**

A number and its absolute value are equal. if you subtract 2 from the number, the new number and its absolute value are not equal.What do you do about the number?What is possible number that satisfies these conditions?
*Tuesday, September 16, 2014 at 7:50pm*

**Math**

Mark finished 3/5 of his work in 15 mins how long will it take to finish all of his work?
*Tuesday, September 16, 2014 at 7:41pm*

**Math**

Mark finished 3/5 of his work in 15 mins how long will it take to finish all of his work?
*Tuesday, September 16, 2014 at 7:41pm*

**Math**

Mark finished 3/5 of his work in 15 mins how long will it take to finish all of his work?
*Tuesday, September 16, 2014 at 7:40pm*

**math**

Write an algebraic expression the sum of a number and 9 ans: x+9
*Tuesday, September 16, 2014 at 7:12pm*

**math**

Write an algebraic expression twice the sum of 15 and a number ans: 2(a+15)
*Tuesday, September 16, 2014 at 7:09pm*

**math**

write an algebraic expression: the sum of a number and 9 ans: x+x+9
*Tuesday, September 16, 2014 at 7:08pm*

**Math**

There are a few red and a few green balls in a box, Blind folded, you have to take out 7 balls to have a red for sure,and you have to take out 13 to have a ball from both colours for sure. How many green and how many red balls are there in the box?
*Tuesday, September 16, 2014 at 6:45pm*

**Math**

You complete 3 centimeters on your necklace in an hour. Each hour after the first,you triple the length of the necklace. Write an expression using exponents for the length of the necklace after 3 hours.Then find the length.
*Tuesday, September 16, 2014 at 6:32pm*

**math**

The length of an arc of a circle equals 1/8 of the circle's circumference. What is the diameter of the circle if the length of the arc is 3.14?
*Tuesday, September 16, 2014 at 6:05pm*

**math**

If k/x=b and b-3=ay, which of the following correctly expresses y?
*Tuesday, September 16, 2014 at 6:04pm*

**math**

what is the temperature at the top of the stratosphere if the sea level temperature was 22 degrees and air temperature decreases 6 degrees every 1km
*Tuesday, September 16, 2014 at 6:01pm*

**math**

Frank is 5 years older than Mary. In 5 years, Frank will be twice as old as Mary is now. How old is Mary now?
*Tuesday, September 16, 2014 at 5:54pm*

**math**

A father can do a job in a certain number of hours. His son takes twice as long to do the job. Working together, they can do the job in 6 hours. How many hours does it take the father to do the job alone?
*Tuesday, September 16, 2014 at 5:52pm*

**math**

A car going 60 miles per hour set out on a 400-mile trip at 12:00 P.M. Exactly 20 minutes later, a second car left from the same place and followed the same route. How fast, in miles per hour, was the second car going if it caught up with the first car at 2:00 P.M.?
*Tuesday, September 16, 2014 at 5:40pm*

**math**

The markdown price of a computer game was $45.00, which represented 75% of the original selling price. What was the original selling price?
*Tuesday, September 16, 2014 at 5:36pm*

**Math**

A ball is thrown up at the edge of a 550 foot cliff. The ball is thrown up with an initial velocity of 87 feet per second. Its height measured in feet is given in terms of time t, measured in seconds by the equation h = -16 t^2 + 87 t + 550 a. How high will the ball go and how...
*Tuesday, September 16, 2014 at 4:03pm*

**Math**

The profit in dollars in producing x- items of some commodity is given by the equation P = - 37 x^2 + 1073 x - 7548 . How many items should be produced to break even? (If there are two break-even points, then enter the smaller value of x. Your solution may not be an integer. ...
*Tuesday, September 16, 2014 at 3:51pm*

**Math**

Decide whether each equation has one solution, no solutions, or infinitely many solutions. 3(y-3)=2y-9+y A. One solution B. No Solutions C. Infinitely many solutions I did 3*y 3*3=9 2y=9+4 3-*=-6 x-27 Is the answer A?
*Tuesday, September 16, 2014 at 3:40pm*

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