Tuesday

September 16, 2014

September 16, 2014

**Branches of Math**

**Recent Math Questions**

Post a New Question | Current Questions

**math**

A ship sails due north from a position 5 degrees, 28' South Latitude to position 6 degrees, 43' North Latitude. Given that one minute of latitude is equivalent to 1 nautical mile, the ship has sailed a distance of A. 75 nautical miles B. 371 nautical miles C. 731 ...
*Thursday, August 14, 2014 at 1:26pm*

**math**

If a ball is thrown directly upward with a velocity of 14 m/s, its height (in meters) after t seconds is given by y = 14t − 4.9t2. What is the maximum height attained by the ball? (Round to two decimal places.) ______ m After how many seconds is that height attained? (...
*Thursday, August 14, 2014 at 12:06pm*

**math**

If $15,000 is invested at an interest rate of 10% per year, compounded monthly, find the value of the investment after the given number of years. (Round your answers to the nearest cent.) a. 6 years b. 12 years c. 18 years
*Thursday, August 14, 2014 at 11:39am*

**math**

A square picture frame has an outer perimeter of 28 and an inner perimeter of 20. What is the shortest distance between any two vertices? A. 5 B. √2 C. 2√2 D. 7 E. 7√2
*Thursday, August 14, 2014 at 11:34am*

**math**

If the lengths of two sides of a triangle are 12 and 15, which of the following must be true of p, the perimeter of the triangle? A. 3<p<27 B. 12<p<42 C. 12<p<54 D. 30<p<54 E. 3<p<54 I honestly don't know what this question is doing in my ...
*Thursday, August 14, 2014 at 11:27am*

**math**

The length of a rectangular landing strip exceeds its width by 3,700 feet. If its perimeter is 17,400 feet, what is the length, in feet, of the airfield? A. 2500 B. 5000 C. 6200 D. 10000 E. 13700
*Thursday, August 14, 2014 at 11:23am*

**Math **

How did 2400x-2x^2 became dA/dx= 2400-4x?
*Thursday, August 14, 2014 at 10:25am*

**math**

If each edge of a cube is increased by 2 inches, the A. volume is increased by 8 cubic inches B. area of each face is increased by 4 square inches D. sum of the edges is increased by 24 inches
*Thursday, August 14, 2014 at 10:12am*

**math**

A square has the same area as a rectangle whose longer side is 2 times the length of its shorter side. If the perimeter of the rectangle is 24, what is the perimeter of the square? I have no idea how to do it. I need help.
*Thursday, August 14, 2014 at 9:38am*

**math**

If one side is 4.2cm and difference in lengths of hypotenuse and other is 14cm find area
*Thursday, August 14, 2014 at 9:34am*

**math**

What is regular pentagon
*Thursday, August 14, 2014 at 9:31am*

**math**

The perimeter of a rectangle with adjacent side lengths of x and y, where x>y, is 8 times as great as the shorter side of the rectangle. What is the ratio of y to x? A. 1:2 B. 1:3 C. 1:4 D. 2:3 E. 3:4
*Thursday, August 14, 2014 at 9:28am*

**Math**

A piece of wire of 14 meters long is cute into 2 pieces. One piece is bent into the shape of an equilateral triangle and the other into the shape of a circle. How should be the wire be cut so that the combined area of 2 figures is as small as possible?
*Thursday, August 14, 2014 at 9:24am*

**Math**

from a lockout tower 25 meters high, a man observes from a position 1.70 meters below the top of the tower that the angle of elevation of the top of a nearby building is 12 degrees 40 minutes and the angle of depression of its base is 70 degrees 20 minutes. If the base of the ...
*Thursday, August 14, 2014 at 8:43am*

**Math**

A piece of wire 12 m long is cut into 2 pieces. One piece is bent into the shape of an equilateral triangle and the other into a shape of a circle. How should the wire be cut so that the combined area of the two figures is as small as possible?
*Thursday, August 14, 2014 at 8:39am*

**math**

an actor invest some money at 9%, and 26000 more that three time the amount at 10% the total annual interest earned from the investment is 27560 how much did he invest at each amount
*Thursday, August 14, 2014 at 2:02am*

**Math: Equivalence Classes**

Let R be the relation on ℤ+×ℤ+ defined by (a,b)R(c,d) if and only if a−2d=c−2b. 1. Find an equivalence class that has exactly 271 elements. 2. Is it true that for every positive integer n, there is an equivalence class that contains exactly n ...
*Thursday, August 14, 2014 at 12:19am*

**Math**

What is 100x=
*Wednesday, August 13, 2014 at 10:51pm*

**MAth**

absolute value ? All numbers are inside bars (sorry don't know how to make bars) -1 + 4 + 3/-2 = 5 + 3/2 = 6.5 am I on the right track
*Wednesday, August 13, 2014 at 9:32pm*

**math test review**

15. Scott knows that the area of the center circle of the basketball court in the school gym is 110 square feet. He wants to find the radius of the center circle of the basketball court in the school gym. He determines that the square of the radius is 34 feet. What is the BEST...
*Wednesday, August 13, 2014 at 7:29pm*

**math test review**

5. A teacher prepares 12 sheets of colored paper for each of sheets her 25 pupils. If 5 pupils are absent, how many sheets of colored paper can each pupil now have? A.10 B.15 C.18 D.20 E.24 I think the answer is A.
*Wednesday, August 13, 2014 at 7:13pm*

**math test review**

2. If 4% of motorists on the New Jersey Turnpike leave at a certain exit and 5% of these go to one particular motel for lodging, out of every 10,000 motorists how many motorists may be expected to go to this motel? A.2 B.10 C.20 D.100 E.200
*Wednesday, August 13, 2014 at 7:08pm*

**math corrections**

There are 10 men spent 10 days finishing one project. If we need to finish the project by 5 days, how many more men do we need? A.1 B.5 C.10 D.15 E.20 Choice E is wrong, i'm starting to think that choice B is the answer.
*Wednesday, August 13, 2014 at 7:06pm*

**math test review**

7.There are 400 couples competing in a dance contest. After each half hour one-fourth of the contests-ants are eliminated. How many couples will remain eligible fore the prize after the first hour? A.300 B.250 C.225 D.200 E.150
*Wednesday, August 13, 2014 at 7:04pm*

**Math**

How do you write 41 ten thousand in standard form.
*Wednesday, August 13, 2014 at 7:04pm*

**Math**

What is the scale factor as a percent that will result if the rule is applied to a point (x,y) on a coordinate grid? 1. (1.5x,1.5y) is it, 150% 15% 1.5% or none of these? 2. (0.7x,0.7y)is it 700% 7% 0.7% or none of these?
*Wednesday, August 13, 2014 at 7:02pm*

**math..please help**

Let A = {1,2,3,4}. Prove the statements (a) and (b). You must describe the relations on A as a subset of AxA and also draw their arrow diagrams. (a) There exists a relation R on A so that R is refexive, symmetric but not transitive. (b) There exists a relation S on A so that S...
*Wednesday, August 13, 2014 at 4:22pm*

**science help**

where are the science helpers is this a connection for math help only
*Wednesday, August 13, 2014 at 4:19pm*

**math**

If a TV set is bought on the installment plan there is a down payment of $25 and 12 monthly payments of $15 each. The same set may be bought for cash at 12% less than the installment price. The amount saved by making a cash payment is:
*Wednesday, August 13, 2014 at 3:02pm*

**math**

What is the area of a square computer screen with 21-in. sides? A. 84 sq. in. B. 220 sq. in. C. 42 sq. in. D. 441 sq. in. please help
*Wednesday, August 13, 2014 at 2:42pm*

**math**

If a TV set is bought on the installment plan there is a down payment of $25 and 12 monthly payments of $15 each. The same set may be bought for cash at 12% less than the installment price. The amount saved by making a cash payment is:
*Wednesday, August 13, 2014 at 2:39pm*

**math**

Taxi fare is $1.20 for the first 1/4 mile and $0.10 for each additional 1/8 mile. A man pays a fare of $3.00. The number of miles he has traveled is:
*Wednesday, August 13, 2014 at 2:05pm*

**math**

A rectangular bin 4 feet long, 3 feet wide, and 2 feet high is solidly packed with bricks whose dimensions are 8 inches, 4 inches, and 2 inches. The number of bricks in the bin is A. 54 B. 648 C. 1298 D. NONE
*Wednesday, August 13, 2014 at 1:54pm*

**Math**

The cost of a telephone call is $0.75 + $0.25 ties the number of minutes. Write an algebraic expression that models the cost of a telephone call that lasts t minutes.
*Wednesday, August 13, 2014 at 1:35pm*

**Math**

If the outer diameter of a metal pipe is 2.84 inches and the inner diameter is 1.94 inches, the thickness of the metal is A. 0.45 of an inch B. 0.90 of an inch C. 1.94 inches D. 2.39 inches
*Wednesday, August 13, 2014 at 1:28pm*

**math**

A micro-millimeter is defined as one millionth of a millimeter. A length of 17 micro-millimeters may be represented as A. .00017 mm. B. .0000017 mm. C. .000017 mm. D. .00000017 mm.
*Wednesday, August 13, 2014 at 1:13pm*

**Geometry: Area and Volume Math **

What is the volume of a cube shaped box with edges 6 cm. in length? A. 1,296 cu. cm. B. 36 cu. cm. C. 18 cu. cm. D. 216 cu. cm. please help
*Wednesday, August 13, 2014 at 12:03pm*

**Math**

The spoke of a wheel reaches from the center of the wheel to its rim. If the circumference of the rim of the wheel is 27 inches, how long is each spoke? Round your answer to the nearest hundredth. A. 2.93 B. 2.07 C. 8.59 D. 4.30 can someone explain how to do this problem I don...
*Wednesday, August 13, 2014 at 11:54am*

**math**

If the number of square inches in the area of a circle is equal to the number of inches in its circumference, the diameter of the circle is A. 4 inches B. 3 inches C. 1 inch D. NONE
*Wednesday, August 13, 2014 at 11:50am*

**math**

The spoke of a wheel reaches from the center of the wheel to its rim. If the circumference of the rim of the wheel is 27 inches, how long is each spoke? Round your answer to the nearest hundredth. A. 2.93 B. 2.07 C. 8.59 D. 4.30
*Wednesday, August 13, 2014 at 11:44am*

**PLEASE HELP (MATH)**

Six quarts of a 20% solution of alcohol in water are mixed with 4 quarts of a 60% solution of alcohol in water. The alcoholic strength of the mixture is. A. 80% B. 50% C. 36% D. None I HAVE NO IDEA HOW TO DO IT PLEASE HELP
*Wednesday, August 13, 2014 at 11:35am*

**math**

If A is 25% more than B, the B is ? less than A. A. 10% B. 15% C. 20% D. 25%
*Wednesday, August 13, 2014 at 11:22am*

**Math**

A bell rings every 2 seconds, and a bird chirps every 3 seconds. If the ring and the chirp occur together right now, they will occur together in A. 40 seconds B. 41 seconds C. 42 seconds D. 43 seconds
*Wednesday, August 13, 2014 at 11:15am*

**math**

If ray BD bisects right angle ABC, the measure of angle ABD is A. 180 degrees B. 90 degrees C. 50 degrees D. 45 degrees
*Wednesday, August 13, 2014 at 10:38am*

**Math**

draw the following parabola: a. principal axis parallel to x; LR=1; passing through (3,1) and (-5,5); opens to the right. b. principal axis parallel to x; passing through (0,4), (0,-1) and (6,7)
*Wednesday, August 13, 2014 at 9:26am*

**math**

Which one of the following is an even number? A. 198^7 B. 19x98 C. 19^87 D. 1+9+87 I know I can just solve each one but is there a faster way?
*Wednesday, August 13, 2014 at 9:19am*

**math**

list all the possible integral zeros: P(x)= x^3-2x^2-11x+12
*Wednesday, August 13, 2014 at 6:10am*

**Math**

1. A gardener has 140 feet of fencing to fence in a rectangular vegetable garden. Find the dimensions of the largest area he can fence. Find the possible rectangular area he can enclose. 2. Suppose a farmer has a large piece of land and he wants to make a rectangular fence for...
*Wednesday, August 13, 2014 at 4:01am*

**math**

please anwer these: 1) how can i multiply and divide polynomials containing radicals? 2) how can i solve radical equations? 3) how can i solve qudratic equations by factoring ? 4) how can i solve quadratic equations graphically ? thank you !!!!!
*Wednesday, August 13, 2014 at 3:44am*

**math**

sketch the plane x+2y-z=6. if you need help,find a third line by letting z=0 and then graph the resulting equation in the xy plane
*Wednesday, August 13, 2014 at 3:09am*

**math**

Finance charge was 5.58 on a monthly balance of 318.76. What is the rate?
*Wednesday, August 13, 2014 at 12:23am*

**math**

What is 10% decrease of the number four? A) 3 B) 15 C) 18 D) 20 E) 30 Lucky guess... C?
*Wednesday, August 13, 2014 at 12:19am*

**fractions/math / Help!**

I need help with a couple of questions 8 3/7-2 1/2 can u show the work and what and how to write the prime factorization of 93 and 425
*Tuesday, August 12, 2014 at 11:50pm*

**Math**

-2/5+(-1/10)
*Tuesday, August 12, 2014 at 11:29pm*

**Math**

A basketball player scored 18 times during one game. He scored a total of 35 points, two for each two point shot and one. For each free throw. How many two point shots did he make? How many free throws?
*Tuesday, August 12, 2014 at 10:32pm*

**math**

I dont understand how to estimate then find the quotient my problem is 35÷955 would it be 40÷1000
*Tuesday, August 12, 2014 at 10:18pm*

**discrete math ..please help**

. Let A = {1,2,3,4}. Prove the statements (a) and (b). You must describe the relations on A as a subset of AxA and also draw their arrow diagrams. (a) There exists a relation R on A so that R is refexive, symmetric but not transitive. (b) There exists a relation S on A so that...
*Tuesday, August 12, 2014 at 10:08pm*

**Math lol**

Explain how 9 x 4 can help you find 9 x 8
*Tuesday, August 12, 2014 at 10:03pm*

**math**

A LAMP POST IS 10 FEET TALL AND CAST A SHADOW. THE DISTANCE FROM THE TOP OF THE LAMP POST TO THE TIP OF THE SHADOW IS 20 FEET. FIND THE ANGLE OF THE ELEVATION.
*Tuesday, August 12, 2014 at 8:39pm*

**math**

What is 56 1/4% = in the simplest form. Give the step by step example to help me understand. Thanks....
*Tuesday, August 12, 2014 at 7:49pm*

**math**

1. Let f : Z to Z and g : Z to Z be functions de fined by f (x) = 3x + 1 and g(x) = [x/2] . (a) Is fog one-to-one? Prove your answer. (b) Is fog onto? Prove your answer. (c) Is gof one-to-one? Prove your answer. (d) Is gof onto? Prove your answer.
*Tuesday, August 12, 2014 at 6:26pm*

**Math (check answers)**

I think its A, Select the mathematical sentence that is true. A. 2 • (8 – 5) + 3 < 7 + 3 • 2 B. 2 • (8 – 5) + 3 > 7 + 3 • 2 C. 2 • (8 – 5) + 3 = 7 + 3 • 2
*Tuesday, August 12, 2014 at 6:24pm*

**MATH help please**

Let R be the relation on ℤ+×ℤ+ defined by (a,b)R(c,d) if and only if a−2d=c−2b. (a) prove that R is an equivalence relation (b) list all elements of the equivalence class [(3,3)] (c) find an equivalence class that has exactly 271 elements. (d) is...
*Tuesday, August 12, 2014 at 5:38pm*

**math **

= ( 1 + 3) * ( 6 - 4 / 2)
*Tuesday, August 12, 2014 at 5:21pm*

**Math**

Adrienne had a party at a local bowling alley. She spent seventy-five dollars for the lane and five dollars per person for shoes. Let c be the total cost of the lane and shoes, and let f be the number of friends at her party. Write an equation to represent the problem. Which ...
*Tuesday, August 12, 2014 at 5:10pm*

**Math**

Please help me simplify 1. [[x^2y^2]^0]^100 2. 3^27/3^9
*Tuesday, August 12, 2014 at 3:27pm*

**math**

Subtract: 5/6 - 3/6 Write the answer in simplest form Choose the best answer from the options below: A 2/6 B 1/6 C 1/3 D 9/6
*Tuesday, August 12, 2014 at 3:07pm*

**Math**

I need help finding the greatest common factor between these two expressions 3u^3x^5y^8 and 21u^6x^5 I was thinking 7u^3y^8
*Tuesday, August 12, 2014 at 3:07pm*

**math PLEASE HELP**

To celebrate the first day of a leap year, I taught my dog to jump through a hoop. It was a Sunday. When he taught me the same trick the first day of the next year, it was a ? A. Sunday B. Monday C. Tuesday D. Wednesday
*Tuesday, August 12, 2014 at 2:47pm*

**MATH**

The first month's dues will be used to rent a film about computer-related careers, to purchase a reference book, and to buy refreshments for the next meeting. If 1/2 of the money is spent on her film, 1/4 of the remainder is used for refreshments, and $7.50 is spent on the...
*Tuesday, August 12, 2014 at 2:38pm*

**PLEASE HELP WITH MATH**

PLEASE HELP WITH MATH ANY HELP OR ANSWER IS APPRECIATED! 1. If the hands on a round clock moved counter-clockwise, to what number would the minute hand point 20 minutes before the hour hand pointed to the 3?
*Tuesday, August 12, 2014 at 2:10pm*

**Math**

Please help Factorise fully 1. X^2-5x-14 2. Ab^2+3b 3. A^3-8a^2+15a
*Tuesday, August 12, 2014 at 1:43pm*

**math**

The largest circular shape my pieced of string can form has a diameter 8 cm long. How long is the diameter of the largest circular shape that half my piece of string can form?
*Tuesday, August 12, 2014 at 1:43pm*

**Math**

A car dealership employs 12 salesman and 28 mechanics. What is the ratio of salesman to mechanics?
*Tuesday, August 12, 2014 at 1:40pm*

**math**

To celebrate the first day of a leap year, I taught my dog to jump through a hoop. It was a Sunday. When he taught me the same trick the first day of the next year, it was a ? A. Sunday B. Monday C. Tuesday D. Wednesday
*Tuesday, August 12, 2014 at 1:37pm*

**math lit, life science, geography and cat**

Hi im a Matric learner and would really like to know what careers I could possibly look into with my subjects listed above Thank you
*Tuesday, August 12, 2014 at 1:22pm*

**math**

A bottle of water costs $1.50. Explain how you would make a graph of four ordered pairs to model the total cost of the water in terms of the number of bottles.
*Tuesday, August 12, 2014 at 1:11pm*

**math**

The largest odd factor of 6^8 times 10^ 6 is?
*Tuesday, August 12, 2014 at 1:11pm*

**math trigonometry **

a post is 20 m high. the angle of elevation of top of a house which is in front of the post is 30° from its top and 45° from foot . Find the height of house and distance between them.
*Tuesday, August 12, 2014 at 12:59pm*

**math**

I ONLY NEED HELP WITH PART C I DID THE REST ON MY OWN plz help Shane drew 3 squares with each side equal to n units. For each square, he does something different to it according to each part below. Part A: Shane increased the length and width of the square by m units each. ...
*Tuesday, August 12, 2014 at 12:57pm*

**math**

In a Sing Thing, the first 4 singers sand song 1, the next 4 sand Song 2, and so forth. Song number 73 sang Song? A. 18 B. 19 C. 20 C. 73 I got 15 but I don't know.
*Tuesday, August 12, 2014 at 11:45am*

**math**

To the nearest 1%, what percent of the 12 months have 31 days? A. 75% B. 70% C. 58% D. 50%
*Tuesday, August 12, 2014 at 11:36am*

**Math**

let f: ℤ→ ℤ and g: ℤ → ℤ be functions defined by f(x) = 3x + 1 and g(x) = |_x/2_|. (a) Is f o g one-to-one? prove (b) is f o g unto? prove (c) Is g o f one-to-one? (d) Is g o f unto? Thank you for your help.
*Tuesday, August 12, 2014 at 10:20am*

**math**

If ray BD bisects right angle ABC, the measure of angle ABD is?
*Tuesday, August 12, 2014 at 9:54am*

**Math **

A farmer is fencing a rectangular area for his farm using the straight portion of a river as one side of the rectangle. If the farmer has 2400 ft of fence, find the dimension of the rectangle that gives the maximum area for the farm
*Tuesday, August 12, 2014 at 9:37am*

**math**

a 5cm by 5cm square is cut from each corner of a rectangular piece of cardboard.the sides are folded up to make an open box with a maximum volume.if the perimeter of the base is 50cm,what are the dimensions of the box.
*Tuesday, August 12, 2014 at 9:23am*

**math**

i'm a four digit number having all the digits odd except 9 and the digits are in ascending order. who am i?
*Tuesday, August 12, 2014 at 9:05am*

**Math**

A rectangular lawn is 60meters by 80meters. A part of the lawn is torn out to install a pool, leaving a strip of lawn of uniform width around the pool. The area of the poolnis 1/6 of the old lawn area. How wide is the strip of lawn?
*Tuesday, August 12, 2014 at 5:07am*

**Math**

A gardenervhas 100 meters of fencing to enclose two adjacent rectangular gardens. The gardener wants the enclosed area to be 400 sq meters. What dimensions should the gardener use to obtain this area?
*Tuesday, August 12, 2014 at 5:03am*

**6th grade math**

Mark has $4.40 nickels and dimes.he has thirteen more nickels than dimes. How many of each does he have?
*Tuesday, August 12, 2014 at 12:59am*

**Math**

1. A gardener has 30 feet by 20 feet rectangular plot of ground. He wants to build a brick of walkway of uniform width on the border of the plot. If the gardener wants to have 400 square feet of ground left for planting, how wide should he build the walkway? 2. A rectangular ...
*Monday, August 11, 2014 at 11:08pm*

**math**

Shane takes a big cube of butter with sides of length 5 from the refrigerator. He then cuts out a little cube with sides of length 2 from one of the corners of the cube. Write a numerical expression with exponents that describes the volume of butter left.
*Monday, August 11, 2014 at 8:17pm*

**math**

Find the solution of the linear system. x + y + z = 0 −x + 2y + 5z = 6 3x − y = 12 (x, y, z)= ???
*Monday, August 11, 2014 at 7:44pm*

**math**

A researcher performs an experiment to test a hypothesis that involves the nutrients niacin and retinol. She feeds one group of laboratory rats a daily diet of precisely 36.12 units of niacin and 30,080 units of retinol. She uses two types of commercial pellet foods. Food A ...
*Monday, August 11, 2014 at 7:38pm*

**math**

25. Julia is casting a play with 3 lead roles. Five students have tried out for each part. As long as no students have tried out for more than one part, how many different ways can Julia cast the lead roles? A.60 B.80 C.125 D.25 E.50
*Monday, August 11, 2014 at 7:25pm*

**math**

2. Five hundred people, and no others, gathered in front of the White House on certain day to protest the government's immigration policies. Of these 500 people, 60% wore red arm bands showing solidarity with the immigrants. Of this 60%, 20% carried signs. How many people ...
*Monday, August 11, 2014 at 6:55pm*

**math**

Mrs. Gomes found that 40% of students at her high school take chemistry. She randomly surveys 12 students. What is the probability that at most 4 students have taken chemistry? Round the answer to the nearest thousandth. A)0.008 B)0.438 C)0.562 D)0.665
*Monday, August 11, 2014 at 6:49pm*

**math**

How to write it in expanded form 12.0067 Is this answer right 1*10+2*1+6*1/1000+7*1/10000
*Monday, August 11, 2014 at 6:43pm*

**math**

1. A box contains a number of items, among them exactly 10 hats, 3 books, and 7 statues. The remaining 1/3 of the items are all blue T-shirts. What percent of the items in the box are books?
*Monday, August 11, 2014 at 6:42pm*

**math corrections**

11. If 8x=(4y)^2 and x=8, where y is an integer, which one can be the value of 4y? A.-6 B.4 C.2 D.-4 E.-8
*Monday, August 11, 2014 at 6:35pm*

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