Tuesday

September 30, 2014

September 30, 2014

**Branches of Math**

**Recent Math Questions**

Post a New Question | Current Questions

**math**

SIN(90*-0)COT(90*-0)/SIN0+COS(90-0)=1/2
*Sunday, August 17, 2014 at 8:04am*

**Math**

1. The length of a rectangle is 6 inches longer than thrice its width. The area of the rectangle is 57 square inches. Write a quadratic equation for the area of the floor in terms of x. Find the length and width of the rectangle. 2. If 1,500 ft of fencing is available to build...
*Sunday, August 17, 2014 at 7:27am*

**Math**

1. A man has 22 feet by 26 feet rectangular lot that he will use for planting. He wants to build a brick of walkway of uniform width on the border of the lot. If the man wants to have 396 square feet of ground left for planting, how wide should he build the walkway? 2. Based ...
*Sunday, August 17, 2014 at 7:19am*

**Math**

How long can I wait to see the answer of my question about Algebra ? Its been a long hour .
*Sunday, August 17, 2014 at 6:41am*

**math**

Find the equation of the circle for which the points (1,2),(4,6) are the end points of a diameter.
*Sunday, August 17, 2014 at 6:31am*

**MAth**

If a worker wants to pack 200 newly harvested mangoes at average size of 3"x2" in delivery boxes .To optimize the cost and profit in packaging , the mangoes must be properly packed in boxes of similar sizes. To systemize counting , there must also be equal ...
*Sunday, August 17, 2014 at 1:42am*

**Math**

If a worker wants to pack 200 newly harvested mangoes at average size of 3"x2" in delivery boxes .To optimize the cost and profit in packaging , the mangoes must be properly packed in boxes of similar sizes. To systemize counting , there must also be equal ...
*Sunday, August 17, 2014 at 1:30am*

**Math**

Sorry! I don't get this one either.. limit of (f(x+Δx)-f(x)) / Δ x with Δ x -> 0 f(x)= 1/(x+3) My work so far before I got stuck... 1/((x+Δx)+3) = 1/(x+Δx+3) - 1/x+3 = 1(x+3)/(x+Δx+3)(x+3) - 1(x+Δx+3)/(x+3)(x+Δx+3) =Δx / (x...
*Saturday, August 16, 2014 at 9:20pm*

**Math**

Use graphing utility to graph function and estimate the limit. Use a table to reinforce your conclusion. Then find the limit by analytic methods. lim (sq root of (x+2) - sq root of 2) / x x->0 Thanks!
*Saturday, August 16, 2014 at 8:21pm*

**Math**

Hi! How would you find the limit? limit of (f(x+Δx)-f(x)) / Δ x with Δ x -> 0 f(x)= 3x-2
*Saturday, August 16, 2014 at 8:17pm*

**math**

Place parentheses in the following equation to make it true. 6 + 6 ÷ 6 x 6 - 6 = 0
*Saturday, August 16, 2014 at 6:48pm*

**math**

2 times{(300-90 divided by 5)-[3 times 26-(8-2 times 3
*Saturday, August 16, 2014 at 6:02pm*

**Math**

For a given right, side a = 76.4 feet and side b = 39.3, what is the measure of angle b to the nearest degree
*Saturday, August 16, 2014 at 3:50pm*

**Math**

If I borrow $26,400 @ 7% interest and make payments of $300 how much will I have left owing after 19 months.
*Saturday, August 16, 2014 at 12:44pm*

** contemporary math**

suppose that the length of one leg of a right triangle is 2 inches less than the length of the other leg.the length of hypotenuse is 10 inches.find the length of each leg.
*Saturday, August 16, 2014 at 12:15pm*

**Math**

Cindy is four years older than twice Mark's age. Juan is half as old as Cindy. How much years older than Juan is Mark?
*Saturday, August 16, 2014 at 10:32am*

**math**

The length of a rectangle is 7 cm longer than its width. If the perimeter of the rectangle is 74cm, find the length and the area of the rectangle.
*Saturday, August 16, 2014 at 7:31am*

**Math**

Count ostriches and llamas. Someone counted 47 heads and 122 legs. How many of each animals is on the farm.
*Friday, August 15, 2014 at 5:53pm*

**math**

x,y,z>0 and 1/(1+x)+1/(1+y)+1/(1+z)=2. prove that xyz<=1/8
*Friday, August 15, 2014 at 1:49pm*

**math**

x,y,z>0 and 1/(1+x)+1/(1+y)+1/(1+z)=2. prove that xyz<=1/8
*Friday, August 15, 2014 at 1:33pm*

** math**

A jar contains four blues marbles and two green marbles. Without looking, two marbles are drawn from the jar. What is the probability that two marbles with the same color will be selected?
*Friday, August 15, 2014 at 12:23pm*

**math i need help 3 questions**

1. The numerator and denominator of a fraction are in the ratio of 3 to 4. If 4 is added to the numerator and subtracted from the denominator, the value of the resulting fraction is 4/3. The numerator of the original fraction is A. 12 B. C. 3 D. 4 2. If it takes b hours to ...
*Friday, August 15, 2014 at 11:06am*

**math**

The volume of cube I is 331 m^3 less than the volume of cube II. If an edge of cube I is 10 meters, an edge of cube II is A. 14 meters B. 13 meters C. 12 meters D. 11 meters
*Friday, August 15, 2014 at 9:40am*

**Math**

A wheel with a diameter of 2 meters rolls on the street for 100 meters. Most nearly, the wheel made how many complete revolutions? A. 64 B. 32 C. 16 D. 8
*Friday, August 15, 2014 at 9:35am*

**math**

If b books cost d dollars, then d books cost A. b dollars B. bd dollars C. d^2/b D. b^2/d These are the worst questions. Its a SHSAT question
*Friday, August 15, 2014 at 9:34am*

**math**

If B is the midpoint of AC, and C is the midpoint of BD, then what percent of CD is AC? A. 25% B. 50% C. 100% D. 200% HELP Is it A, 25%?
*Friday, August 15, 2014 at 9:23am*

**math**

If ab=x+3,bc=2x and ac=4x-5.then for which value of x,b lies on ac?
*Friday, August 15, 2014 at 9:15am*

**math**

If the circumference of a circle of radius r inches is equal to the perimeter of square with a side length of s inches, r/s= A. 4/π B. 2/π C. √2/π D. √2/π E. 1/2π I need help.
*Friday, August 15, 2014 at 9:01am*

**math **

If a bicycle wheel has traveled f/π feet after n complete revolutions, what is the length in feet of the diameter of the bicycle wheel? A. f/nπ^2 B. π^2/fn C. nf/π^2 D. nf/π^2 E. f/n
*Friday, August 15, 2014 at 8:57am*

**math**

Al is twice as old as Bill, who is twice as old as Carl. In 10 years, Al will be twice as old as Carl. How old is Al now? A. 40 B. 20 C. 10 D. 5
*Friday, August 15, 2014 at 8:52am*

**math**

When the perimeter of an equilateral triangle is doubled, the result is 24. The length of a side of the original triangle is A. 4 B. 6 C. 8 D. 12
*Friday, August 15, 2014 at 8:43am*

**math**

solve trinomial x^2-3x+4
*Friday, August 15, 2014 at 12:27am*

**Math**

Which inequality is correct? A. ^11 <^22 < 11 B. 11 < ^11 < ^22 C. ^11 < 11 < ^22 D. ^22 < ^11 < 11 My answer is c is that correct
*Thursday, August 14, 2014 at 10:43pm*

**math**

A group of 21 people went to the country fair with 9 people on a stagecoach and 3 people in each buggy. On the return trip, 4 people rode in each buggy. How many people returned on the stagecoach?
*Thursday, August 14, 2014 at 9:18pm*

**Math**

In the number 7,725, which places contain digits where one digit is ten times as great as the other?
*Thursday, August 14, 2014 at 9:10pm*

**math**

Why is it better to NOT use a letter that stands for the " unit name" such as s and t that stand for students and teachers as a variable?
*Thursday, August 14, 2014 at 8:16pm*

**Math**

Tommy has taken a job in which he earns $1 on the first day of the month, $2 on the second day, $3 on the third, and so on. How much money will he earn in the month of October?
*Thursday, August 14, 2014 at 7:55pm*

**Math**

In a parking lot there are motorcycles and cars. There are 48 motors and 136 tires. How many motorcycles and how many cars are in the parking lot?
*Thursday, August 14, 2014 at 7:54pm*

**math**

14. According to the Texas Parks and wildlife Department, there are about 40 white-tailed deer per square mile in each of 35 Texas counties. A rectangular area on a ranch in one of these countries measures 2.25 miles by 6.7 miles. Which of the following is closest to the ...
*Thursday, August 14, 2014 at 7:14pm*

**math**

19. Which statement describes the relationship between the line graphs of the equations below? y=-2x+4 y=0.5x+4 A.The line graph are the same line. B.The line graph are parallel lines. C.The line graph are perpendicular lines. D.The line graphs intersect, but are not ...
*Thursday, August 14, 2014 at 5:15pm*

**math corrections**

16. Carlos sells video games on Web site. The cost for his web site is $75 per year. Carlos sells each video game for $25. What inequality can Carlos use to determine g, the number of video games he must sell to make a profit of at least $50 per year? A.100g less than and ...
*Thursday, August 14, 2014 at 5:08pm*

**math**

Shawnee is putting $3,500 into an account earning 4.85% interest compounded quarterly. She estimates that it will take just over 11 years for this investment to grow to $6,000. Which of the following is a true statement?
*Thursday, August 14, 2014 at 5:04pm*

**math corrections**

14. According to the Texas Parks and wildlife Department, there are about 40 white-tailed deer per square mile in each of 35 Texas counties. A rectangular area on a ranch in one of these countries measures 2.25 miles by 6.7 miles. Which of the following is closest to the ...
*Thursday, August 14, 2014 at 4:54pm*

**math corrections**

10. You have a nickel, a dime, a quarter and a fifty-cent piece. A clerk shows your several articles, each different price and any one of which you could purchase with your coins without receiving change. What is the largest number of articles he could have shown you? A.8 B.10...
*Thursday, August 14, 2014 at 4:43pm*

**math corrections**

9. A rectangular field 50 meters in width and 120 meters in length is divided into two fields by a diagonal line. Find the length of fence in meters required to enclose one of these fields? A.130 B.170 C.180 D.200 E.300 Choice A is wrong.
*Thursday, August 14, 2014 at 4:39pm*

**math**

What is the fewest number of 7's that can be added together to make their sum greater than 4000? A. 4001 B. 572 C. 571 D. 470
*Thursday, August 14, 2014 at 2:17pm*

**math**

an actor invests money at 7% and 29000 more than three times the amount at 11% the total annual interest earned from the investments is 23990 how much did he invest at each amount.
*Thursday, August 14, 2014 at 2:09pm*

**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*

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