Saturday

March 28, 2015

March 28, 2015

**Branches of Math**

**Recent Math Questions**

Post a New Question | Current Questions

**math**

Two positive integers aer in the ratio 2:5. If the product of the two integers is 40, find the larger integer.
*Friday, March 27, 2015 at 11:04pm*

**math **

Some functions that aren't invertible can be made invertible by restricting their domains. For example, the function x^2 is invertible if we restrict x to the interval [0,\inf), or to any subset of that interval. In that case, the inverse function is-\sqrt x. (We could ...
*Friday, March 27, 2015 at 10:45pm*

**math **

The function f(x) = cx/2 x+3 satisfies f(f(x))=x for all real numbers x\= -3/2. Find c.
*Friday, March 27, 2015 at 10:42pm*

**math**

75 pupils sat for a Science Test. The average score was 58 marks. If the average score of the girls was 62 marks and the average score of the boys was 56 marks, how many boys sat for the test?
*Friday, March 27, 2015 at 9:14pm*

**math**

Briana wants to divide 5/8 pound of soil evenly among 4 pots how much soil will be in each pot
*Friday, March 27, 2015 at 8:52pm*

**Math**

Tasha is planning an expansion of a square flower garden in a city park. If each side of the original garden is increased by 7m the new total area will be 144m^2. Find the length of each side of the original garden.
*Friday, March 27, 2015 at 8:28pm*

**Math**

What is the value of c so that y=x^2+15x+c is a perfect square trinomial?
*Friday, March 27, 2015 at 8:22pm*

**math**

the world's largest cube puzzle in Knoxville measures 6 feet on each side. The scale factor between a standard cube puzzle and largest is 1/24. Find the surface area and volume of the standard cube puzzle. Answer is 0.375ft^2/0.015625ft^3 Not sure how they figured it out i...
*Friday, March 27, 2015 at 8:18pm*

**Math**

3. A rectangular prism has a width of 92 ft and a volume of 240 ft3. Find the volume of a similar prism with a width of 23 ft. Round to the nearest tenth, if necessary. (1 point) 3.8 ft3 60 ft3 15 ft3 10.4 ft3 Please help me work this out! I'm not sure how to do this
*Friday, March 27, 2015 at 7:51pm*

**math**

The model of a new apartment building is 10 in, x 28 in x 18 in. the architect plans for the new building to be 144 times the size of the model. What will the volume and surface area of the new building be when it is completed? 10 x 18 x 28 = 5040 x 144^3 divided by 12 =...
*Friday, March 27, 2015 at 7:13pm*

**Math**

If someone could help me with this, I would appreciate it! Thanks! Directions: Determine if these two are inverses of one another. A= [ 1 1 1 3 5 4 0 -1 0] A^-1= [ 4 -1 -1 0 0 -1 -3 1 2]
*Friday, March 27, 2015 at 6:38pm*

**English 3**

In which sentence is the word punitive used correctly? A. Mario proposed an ingenious, punitive solution to the math problem. B. Teresa’s report was punitive, and she added to its interest by presenting a brilliant slide show. C. The jury’s verdict awarded the ...
*Friday, March 27, 2015 at 5:36pm*

**math**

500 tickets being sold at 2.00 per ticket but you can get 3 tickets for 5.00 if all the tickets are sold at 3 for 5.00 how much money will be earned when all tickets are sold
*Friday, March 27, 2015 at 4:08pm*

**math**

the scale listed on the box containing a model ship is 1 inch to 8 feet. which proportion can be used to find the actual length of the ship if the length of the model is 5 feet
*Friday, March 27, 2015 at 4:00pm*

**general**

anyopne know any good personal math tutors onine
*Friday, March 27, 2015 at 1:42pm*

**finite math **

Sam wants to invest the same amount at the end of every 3 months so that he will have 4000 in 3 years. The account will pay 6% compounded quarterly. How much should he deposit each quarter.
*Friday, March 27, 2015 at 1:06pm*

**math**

to the nearest mile,how many miles did the Navajo travel if 1 inch= 4 miles
*Friday, March 27, 2015 at 1:04pm*

**finite math **

A young couple saves for a down payment on a house by depositing $100 each month into an annuity that pays a 4.8% annual rate. Find the amount in the annuity at the end of 2 years.
*Friday, March 27, 2015 at 1:03pm*

**Math Help!!!**

identify the sequence as arithmetic, geometric, or neither. explain your answer. 1.6 , 0.8 , 0.4 , 0.2 ....
*Friday, March 27, 2015 at 12:51pm*

**math **

Sam is flying a kite. The length of the kite string is 80 meters, and it makes an angle of 75° with the ground. The height of the kite from the ground is... A.20.27 B.61 C.77.27
*Friday, March 27, 2015 at 12:30pm*

**Math Help!!!**

use the function rule f(X) =3x-2 find the output f(1.5). 2.5 -2.5 6.5 - 6.5
*Friday, March 27, 2015 at 12:03pm*

**Math**

Use Newton’s Method to approximate 3^(√7) to four decimal places. Use x1 = 2 as your seed. Round off intermediate iterates to five decimal places
*Friday, March 27, 2015 at 11:39am*

**Math**

Andrew has a combination of 8 quarters, dimes and nickels that add up to a value of 95 cents. How many of each coin does Andrew have?
*Friday, March 27, 2015 at 10:50am*

**math**

Why Was the Engineer Driving the Train Backwards?
*Friday, March 27, 2015 at 9:49am*

**math**

gjfwcaCh
*Friday, March 27, 2015 at 9:22am*

**math/stats**

A sample of 50 items is selected to determine whether or not to accept the hypothesis that a population means differs from a value of 20. The sample mean and standard deviation are 18 and 7, respectively. The null hypothesis is not rejected, which of the following is a ...
*Friday, March 27, 2015 at 9:20am*

**math/stats**

Which of the following statements are true? (A) In a two-tail test of hypothesis for a population mean the decision rule is to reject H0 if the test statistic lies outside of the action limits. (B) A statistical test of hypothesis is performed under the assumption that the ...
*Friday, March 27, 2015 at 9:19am*

**math**

The drama club needs to make 30 costumes for the school play. Each costume uses 3 3/4 yards of material. If a bolt of material contains 20 yards and if the fabric store sells material only in full bolts,how many bolts should the drama club buy?
*Friday, March 27, 2015 at 8:45am*

**math**

The coordinates of (triangle) ABC are A(-3,-1 ) , B( 5,1 ) and C (2,4) (i) Calculate the length of AB , BC and AC (ii) Hence, show that (triangle) is a right- angled triangle
*Friday, March 27, 2015 at 3:08am*

**math**

A class survey in a large class for first-year college students asked, “About how many minutes do you study on a typical weeknight?” The mean response of the 463 students was = 118 minutes. Suppose that we know that the study time follows a Normal distribution with ...
*Friday, March 27, 2015 at 12:29am*

**Math**

a cylinder with base area 24π cm2 and height 16 cm
*Thursday, March 26, 2015 at 11:50pm*

**Math Venn Diagram**

I need help with these questions: A survey of 115 children found that 39 liked The Little Mermaid 43 liked 101 Dalmatians 56 liked Mickey Mouse 7 liked The Little Mermaid and 101 Dalmatians 10 liked The Little Mermaid and Mickey Mouse 16 liked 101 Dalmatians and Mickey Mouse 4...
*Thursday, March 26, 2015 at 11:08pm*

**Math-Lit 143**

Suppose you buy a two-year CD for $50,000 from First Command Bank. Use the APY from the First Command Bank table to determine how much interest it earns for you at maturity.
*Thursday, March 26, 2015 at 11:06pm*

**Math**

A building has 2 floors. Each floor has 4 rooms. Each room has 6 tables. Each table has 5 typewriters. How many typewriters would have to be taken off each table so that the number of typewriters on the tables on one floor would be the same as the number of tables in the ...
*Thursday, March 26, 2015 at 10:54pm*

**Math**

A wheel turns 9times per minute its diameter is1.2 at what speed must I run to stay on top
*Thursday, March 26, 2015 at 10:46pm*

**Math**

a cylinder with base area 24π cm2 and height 16 cm
*Thursday, March 26, 2015 at 10:32pm*

**Math **

Sarah was trying to figure out her grades for her math course. She only knew the grade of 4 of the tests she had taken, however the class had taken 5 tests total. She scored a 94, 67, 83, and 93. If Sarah ended up with a grade of 90, what did she get on the 5th and final test...
*Thursday, March 26, 2015 at 10:22pm*

**Math**

Jane will receive 18% less of her regular pay when she retires. Her regular pay is $500 per week. a How much would she receive per week if she retires today? answer: 500/18% = 90 500-90= $410 b. Explain how you can make this same calculation using 100%-18%=82% answer: same as ...
*Thursday, March 26, 2015 at 10:15pm*

**math**

At a lumber company, shelves are sold in 3 types of wood, 2 different widths and 5 different lengths. How many different types of shelves could be ordered?
*Thursday, March 26, 2015 at 10:13pm*

**math**

You build an architectural model of a new office complex using a scale factor of 75. Suppose you wanted to fill both the scale model office complex and the actual office complex with marbles. How many times the number of marbles required for the model would be required for the...
*Thursday, March 26, 2015 at 10:12pm*

**Math**

If a wheel turns 9 revolutions per minute and its circumference is 3.77 what speed must a mouse run to stay on top
*Thursday, March 26, 2015 at 10:11pm*

**Math**

Kelly has 40 hours of work to do on her fair project . she has 5 weeks to complete it on time?
*Thursday, March 26, 2015 at 9:33pm*

**math**

The area of a circle is given by the formula A = ðr2, where r is the radius. If increasing the radius of a circle by 1 inch gives the resulting circle an area of 100ð square inches, what is the radius of the original circle?
*Thursday, March 26, 2015 at 9:12pm*

**Math 115**

A manufacture has been selling 1400 television sets a week at $480 each. A market survey indicates that for each $24 rebate offered to a buyer, the number of sets sold will increase by 240 per week. a) Find the price p(x) of each television as a function of x, where x is the ...
*Thursday, March 26, 2015 at 9:11pm*

**Math 115**

The manager of a large apartment complex knows from experience that 90 units will be occupied if the rent is 444 dollars per month. A market survey suggests that, on the average, one additional unit will remain vacant for each 6 dollar increase in rent. Similarly, one ...
*Thursday, March 26, 2015 at 9:10pm*

**Math 115**

A fence is to be built to enclose a rectangular area of 320 square feet. The fence along three sides is to be made of material that costs 6 dollars per foot, and the material for the fourth side costs 14 dollars per foot. Find the dimensions of the enclosure that is most ...
*Thursday, March 26, 2015 at 9:09pm*

**Math 115**

The revenue from selling q items is R(q)=475q−q2, and the total cost is C(q)=175+6q. Write a function that gives the total profit earned, and find the quantity which maximizes the profit.
*Thursday, March 26, 2015 at 9:07pm*

**Math**

Ricky needs 3 1/4 cups of sugar to make candy. He already has 2 1/2 cups. How many more cups of sugar does he need? Do you add for this question or subtract? That's all that I need to know.
*Thursday, March 26, 2015 at 9:06pm*

**chemistry**

What is the theoretical yield of H[2]O (in grams) if 8.3 mol H[2]S were consumed in the above reaction? If 137.1g of water was actually collected after the reaction, what is the percent yield? I have no idea to do this problem. I am not good in math at all and currently taking...
*Thursday, March 26, 2015 at 9:03pm*

**math**

The function f(x) = cx/2x+3 satisfies f(f(x))=x for all real numbers x\= -3/2. Find c.
*Thursday, March 26, 2015 at 8:53pm*

**math **

Suppose h(x)=1/\sqrt x for x>0. Does h have an inverse? If so, find h^-1(4).
*Thursday, March 26, 2015 at 8:48pm*

**math **

[2/3 -1/3] times 5/8
*Thursday, March 26, 2015 at 8:34pm*

**Math**

Convert 22 miles to yards. Use a proportion to solve. Show your work. Where do I start with this problem?
*Thursday, March 26, 2015 at 8:18pm*

**math**

A box contained some red, blue, and green markers. For every 5 red markers, there were 2 blue markers. For every 3 blue markers, there were 5 green markers. a. Find the ratio of red markers to blue markers to green markers. b. When 6 red markers were removed from the box,3/7 ...
*Thursday, March 26, 2015 at 8:12pm*

**math**

Don't laugh at me lol...it says Jamal is 5 feet tall. One sunny morning he notices that he casts a shadow that is 2 feet long. If the school building casts a shadow that is 7 feet long at the same time, what is the height of the building?
*Thursday, March 26, 2015 at 8:06pm*

**Math**

A set of trading cards sells for $12.00. After sales tax, it costs $12.60. what is the sales tax rate? Do I divide to get this answer? Please help.
*Thursday, March 26, 2015 at 8:01pm*

**6 grade math**

Choose all statements that are not true. a 20% of 20 is 4 b 30% of 30 is 9 c 40% of 50 is 15 d 50% of 110 is 60 e 60% of 60 is 360 The answer I choose is all of them. Is this correct.
*Thursday, March 26, 2015 at 7:55pm*

**Math**

Choose all statements that are true? a 15% of 15 is 1 b 5% of 50 is 10 c 10% of 100 is 10 d 2% of 100 is 5 e 3 % of 200 is 6 I picked a, c and e.
*Thursday, March 26, 2015 at 7:45pm*

**Math**

Choose all measurements that are equivalent to 45 meters. a 450 centimeters b 4500 centimeters c 0.045 kilometer d 0.45 kilometer e 4500 millimeters I pick b, d, e is this correct.
*Thursday, March 26, 2015 at 7:39pm*

**Math**

A printing company makes plastic banners 15 feet long by 6 feet wide. An overseas customer wants to know about how many square meters the banner is. Use 1 foot = 0.305 meter. a 8.37 square meters b 27.5 square meter c 90.0 square meter d 900 square meter Is c the correct answer?
*Thursday, March 26, 2015 at 7:35pm*

**Math**

Which is the best buy? a $19.25 for 11 candy bars b $15.39 for 9 candy bars c $17.30 for 10 candy bars d $22.62 for 13 candy bars I chose b.
*Thursday, March 26, 2015 at 7:27pm*

**Math **

What ratio is equivalent to 3/20? a 5 to 100 b 100 to 5 c 140 to 21 d 21 to 140 I picked d is this correct?
*Thursday, March 26, 2015 at 7:22pm*

**5th grade math**

Find the value of 'n' to make each statement true. 1. 22 times n is between 80 and 85
*Thursday, March 26, 2015 at 7:16pm*

**math**

if a 3-foot -tall child casts a shadow that is 2 feet long, how tall is a telephone pole that casts a shadow that is 40 feet long?
*Thursday, March 26, 2015 at 7:14pm*

**Math**

Manyatta Village is 74 km North West of Nyangata Village. Chamwe village is 42 km west of Nyangata. find the bearing of Chamwe from Manyatta
*Thursday, March 26, 2015 at 7:08pm*

**5th grade math**

Find the value of 'n' to make each statment true. 1.22 x n is between 80 and 85
*Thursday, March 26, 2015 at 6:59pm*

**7th grade math (probability)**

Can you check these, please? Ten cards numbered 1 through 10 are mixed together and then one card is drawn. Find the probability of each event. Write each answer as a fraction, percent, and decimal. 14. P(less than 5) = 4/10 = 2/5 Ans: 2/5, 40%, 0.4 15. P(greater than 3) = 7/...
*Thursday, March 26, 2015 at 6:42pm*

**math**

A model rocket is shot straight up into the air. The table shows its height, h(t), at time t. Graph the table below and determine a function, in standard form, that estimates the height of the rocket at any given time. Time(s) Height (m) 0 0.0 1 25.1 2 40.4 3 45.9 4 41.6 5 27....
*Thursday, March 26, 2015 at 6:12pm*

**math**

1 3 − x 4 = 7 12 find x
*Thursday, March 26, 2015 at 6:01pm*

**Math**

Shonetta Woods has a limited payment insurance policy with an annual premium of $1,125.00 until age 65. She pays the premium quarterly at an increased rate of 26.2 percent per quarter. How much money can Shonetta save in one year by paying the premium annually? Is it $54.00?
*Thursday, March 26, 2015 at 5:54pm*

**Math**

Fidel Baez has a health insurance plan with a $150.00 deductible. The plan covers 80 percent of his hospital charges. Fidel's recent health care costs include $300.00 in co-payments and a hospital bill of $2,300.00. What amount did he pay? Is it $910.00?
*Thursday, March 26, 2015 at 5:53pm*

**Math**

amy said there are three cubic feet in a cubic yard explain why amy is incorrect
*Thursday, March 26, 2015 at 5:51pm*

**math**

For what values of k does the line y= x + k pass through the circle defined by x^2 + y^2 = 25 at: 2 points? 1 point? 0 points? I found the discriminant: 100- 4k^2 but i dont know how to find for each of the points
*Thursday, March 26, 2015 at 5:23pm*

**math**

Terry, Corey, and Chris together made 20 baskets in a basketball game. Terry made 5 more than Corey. Chris made 3 times as many as Corey. How many baskets did they all have?
*Thursday, March 26, 2015 at 5:03pm*

**Math Check**

1.) Find 1/2([5 -2 4 0]+[14 6 -18 9]) A. [19/2 2 -7 9/2] B. [-9/2 -4 -11 9/2] C. [ 19/2 2 -7 9] D. [19 4 -14 9] My answer: C. 2.) Is it possible to find AB when you are give A= [3 2 1] and B= [2 3 0]? (this 2, 3, 0 is suppose to line up like up and down.) A. [12] B. [6 6 0] C...
*Thursday, March 26, 2015 at 5:01pm*

**Math**

How do you figure out the dimensions of a flower pot that has 300 cubic inches of soil?
*Thursday, March 26, 2015 at 4:52pm*

**math**

A swimming pool is 50 meters long. Jamie swam 60 lengths of the pool in one week. How many kilometers did she swim?I'm not sure how to do this. 50 x 60 = 3,000
*Thursday, March 26, 2015 at 4:50pm*

**Math**

Suppose she cut the cake into 8 equal size pieces and 6 people ate all the pieces. Explain how they could have divided the pieces so that everyone ate the same amount of cake. Show work in a drawing
*Thursday, March 26, 2015 at 4:50pm*

**math**

Complete the standard form of the equation –3y = 8 – 4x
*Thursday, March 26, 2015 at 4:31pm*

**Math**

For what values of k does the line y= x + k pass through the circle defined by x^2 + y^2 = 25 at: 2 points? 1 point? 0 points? I found the discriminant: 100- 4k^2 but i dont know how to find for each of the points
*Thursday, March 26, 2015 at 4:30pm*

**math**

What is it callec when you use a compass to find the midpoint of a line segment?
*Thursday, March 26, 2015 at 4:28pm*

**math**

Im doing a crossword and it says flip figure (mirror image) what is this?
*Thursday, March 26, 2015 at 4:25pm*

**math **

There are 20 bikes in spinning class, the bikes are arranged 4 rows, with 5 bikes in each row. They hope to be in the same row, but cannot request specific bike. Determine the probability that all 5 friends will be in same row with Jeff and dariya at either end.
*Thursday, March 26, 2015 at 4:05pm*

**math**

This year, Rosa harvested 60 cucumbers, 25 tomatoes, and 15 peppers from her garden. In a circle graph of this data, what angle measure (in degrees) should Rosa use for the peppers section?
*Thursday, March 26, 2015 at 3:57pm*

**^math^**

^Pls help^ Question= Evaluate sqrt(19 - 4sqrt21) ...,where sqrt is square root.
*Thursday, March 26, 2015 at 3:32pm*

**math**

Find the missing angle measurement
*Thursday, March 26, 2015 at 3:07pm*

**math**

What is the least common denominator for the fractions and ? A. 14 B. 18 C. 24 D. 48
*Thursday, March 26, 2015 at 2:18pm*

**Math**

Wong ran for 45 minutes in a marathon without stopping.How many seconds Wong run without stopping?
*Thursday, March 26, 2015 at 2:06pm*

**MATH**

Sam invested part of his 36,000 bonus in a fund that paid an 8% profit and invested the rest in stock that suffered a 5% loss find the amount of each investment if his overall net profit was 2,750
*Thursday, March 26, 2015 at 1:44pm*

**Math**

The sum of any two consecutive integers is a composite number. A. 16 + 17 = 33 B. 10 + 11 = 21 C. 6 + 7 = 13 D. 7 + 8 = 15
*Thursday, March 26, 2015 at 1:36pm*

**math**

Why wasn't cross multiplication used. Five editors finish a project in 3 1/2 weeks. How many editors are needed to complete the same project in 1 1/6 weeks 5/3.5= x/1.16
*Thursday, March 26, 2015 at 1:17pm*

**math**

what is the volume of a cylinder with a radius of inches and a height of 6 inches ?
*Thursday, March 26, 2015 at 1:16pm*

**Math**

A box of Cereal X contains 36 ounces and costs $ 4.99. A box of Cereal Z contains 30 ounces and costs $ 4.50. Which cereal is the better buy ?
*Thursday, March 26, 2015 at 1:04pm*

**math**

Is there some other way I can explain this to my 8th grader. Five editors finish a project in 3 1/2 weeks. How many editors are needed to complete the same project in 1 1/6 weeks
*Thursday, March 26, 2015 at 1:03pm*

**math**

What is the missing exponent? (106) = 10 -18
*Thursday, March 26, 2015 at 1:02pm*

**math **

A rectangle has an area of 400 cm^2. If the rectangle is a square, what is its perimeter?
*Thursday, March 26, 2015 at 12:52pm*

**Math **

A 40-foot by 10-foot rectangular garden is enclosed by a fence. To make the garden larger, while using the same amount of fencing, its shape is changed to a square. How many square feet larger than the old garden is the new garden?
*Thursday, March 26, 2015 at 12:41pm*

**Math**

An experiment consists of rolling two fair number cubes. What is the probability that the sum of the two numbers will be 4?
*Thursday, March 26, 2015 at 12:39pm*

**math **

The area of a triangle is 600 square feet. Find the altitude, in feet, of the triangle if the length of the corresponding base is 30 feet.
*Thursday, March 26, 2015 at 12:22pm*

**math **

An equilateral triangle and a square both have perimeters of 48 inches. What is the ratio of the length of the side of the triangle to the length of the side of the square? Express your answer as a common fraction.
*Thursday, March 26, 2015 at 12:02pm*

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