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October 2, 2014

Homework Help: Math

Branches of Math

Recent Math Questions

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math
completing the square of x^2-3x-8=0
Tuesday, August 19, 2014 at 7:23am

math
. A factory employing a large number of workers finds that over a period of time , the average absentees rate is three workers per shift. Calculate the probability that in a given shift (i)exactly two workers will be absent , (ii)more than four workers will be absent .
Tuesday, August 19, 2014 at 6:56am

Math
Why is life like a shower
Tuesday, August 19, 2014 at 12:47am

Math
Does 5 round up or down?
Tuesday, August 19, 2014 at 12:11am

4th grade math
If jill climbed 100 feet more, how many feet above sea level would she be?
Monday, August 18, 2014 at 11:23pm

Math
A class us planning a party. A pizza restaurant cuts each pizza into 8 slices. There are 32 students. How many pizzas does the class need to order for each student to have a slice? Explain
Monday, August 18, 2014 at 10:17pm

Teaching in Early childhood progras
Self appraisals should not be used to assess which of the following? A. Math concepts B. Dispositions regarding tasks C. IEP adherence D. Literacy my answer is c.
Monday, August 18, 2014 at 9:18pm

Math
If a plane flies due north for 70km, then due west for 145km, what would the compass bearing be for the plane from its starting point? Please email me once you have the result at jodie.jebb@moc.sa.edu.au
Monday, August 18, 2014 at 8:53pm

math
A plane flies 90km on a bearing 030 degree and then flies 150km due east. How far east of the starting point is the plane?
Monday, August 18, 2014 at 8:48pm

math
the distance between DELHI TO Meerut is 75km two trains speed of 100km/h & 80 km/h leave the two station at 8am towards each other at what time will they pass each other
Monday, August 18, 2014 at 8:36pm

Math
I wounder what is 5(29)? I just really don't under stand how to solve it.
Monday, August 18, 2014 at 7:48pm

math
49. How many integers between 70 and 105 have a reminder of 2 when divided by 15?
Monday, August 18, 2014 at 7:11pm

math
59. The scale on a map is 1 inch= x miles. What is the distance, in inches, on the map between two cities that are m miles apart?
Monday, August 18, 2014 at 7:07pm

math
If an item that sells for $81.00 has a 50.0% markup on cost, what is the cost?
Monday, August 18, 2014 at 6:44pm

MAth
when working with numbers (negative and positive)inside absolute value bars are they considered positive and bars removed?
Monday, August 18, 2014 at 5:52pm

MAth
absolute value problems |30|/|10| + |-2+7|/5 x 8 = 17.4 is this answer correct?
Monday, August 18, 2014 at 5:32pm

math
which numbers should you add to estimate the answer to this problem: 87,087 + 98.000 - 88,000+ 98,000 -85,000+95,000 - 87,000 +98,000 - 80,000+ 90,000 thanks for your help!
Monday, August 18, 2014 at 5:03pm

math
thanks damon! u rock! another quick question....how do you estimate the total precipitation in inches and the total number of days with precipitation asheville and wichita asheville= 47.71 inches 124 days wichita = 28.61 inches 85 days
Monday, August 18, 2014 at 4:42pm

math
estimate the total weight of two boxes that weigh 9.4lb and 62.6 lb using rounding and compatible numbers. Which estimate is closer to the actual total weight? why? thanks!
Monday, August 18, 2014 at 4:26pm

math
The length of a rectangle is 7 m less than triple the width. If w represents the width, write an expression for the length The length of a rectangle is 7 m less than triple the width. If w represents the width, write an expression for the length, l.
Monday, August 18, 2014 at 12:50pm

math
The length of a rectangle is 7 m less than triple the width. If w represents the width, write an expression for the length
Monday, August 18, 2014 at 12:44pm

Math
Which shows the product of a number n and 12? A.n-12 B.n/12 C.12n D.n+12 Is the answer D?
Monday, August 18, 2014 at 12:31pm

math
Eric received 76 tokens to use in the arcade at the pizza restaurant. Which of the following inequalities represents the number of tokens Eric used in the arcade? x < 76 x < 76 x > 76 x > 76
Monday, August 18, 2014 at 11:02am

math
Starting from today, every month you save $500 into a bank account with earns interest at an annual rate of 4%. How much money do you have in the account at the end of 4 years?
Monday, August 18, 2014 at 9:50am

Math
a person sol 100 shares of stock at a profit of 15%. if the selling price for the 100 shares was 2300. what was paid for the stock?
Sunday, August 17, 2014 at 11:51pm

Math
A person stock worth 2300 at 100 shares and they had a 15 % profit how much was the stock
Sunday, August 17, 2014 at 11:47pm

math
a bag contains 400 coins ,and 33 1/2 % are nickels, how many nickels are there?what percent of the coins are not nickels
Sunday, August 17, 2014 at 10:40pm

math
The leng of the smaller rectangle is 1 inch less than twice its wide. both the dimensions of the larger rectangle are 2 inches longer than the smaller rectangle. the area of the shaded region is 86 square inches. what is the area of the smaller rectangle?
Sunday, August 17, 2014 at 9:33pm

Math
Assign variables for the following problem (you do not need to solve the problem) Thirty fluffaluff trees are introduced on an island at the start of year zero. At the start of thirty there are 55 fluffaluff trees. Use the fluffaluff formula to find how many fluffaluff trees ...
Sunday, August 17, 2014 at 9:25pm

Math
You ride your bike at an average speed of 8 miles per hour.how many miles can you travel in 1.5 hours?
Sunday, August 17, 2014 at 8:54pm

important math question
the equation x^3 -x-5=0 has one solution for x between -2 and 2. what is the solution? how do I get this
Sunday, August 17, 2014 at 2:37pm

math
evaluate the limit as x approaches 0 from the right. of the function xcos(1/x) I know the answer is O but I am not sure as of my reasoning. I just that that since cos(1/x) is being multiplied by a number approching 0 that the whole limit would be o.
Sunday, August 17, 2014 at 2:17pm

math
a computer is being lowered into the ocean from a platform. at this moment it is 210 feet below surface and being lowered 150 feet every 30 minutes. how to write this in the form of an expression?
Sunday, August 17, 2014 at 12:13pm

math
The length of a rectangle of perimeter 64 cm is 5/3 of its breadth . Find the area of rectangle ?
Sunday, August 17, 2014 at 11:19am

math
A swimmer S is in the sea at a distance of 4km from the closest point A on a straight shore.His house B is on the shore at a distance 5km from A.He can swim at a speed of 3km/hr.The distance of the point on the shore from B so that he reaches his home in the minimum time is=?
Sunday, August 17, 2014 at 10:27am

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&quot;x2&quot; 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&quot;x2&quot; 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

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