Thursday

November 27, 2014

November 27, 2014

**Branches of Math**

**Recent Math Questions**

Post a New Question | Current Questions

**Math**

6. If 31/2 pounds of bananas cost $.98, how much would one pound cost? A. $.20 B. $.14 C. $.28 D. $.18 C? 7. A used car is priced at $2,695. If you borrow the money for the car, your payments will be $122 a month for 30 months. How much will you save by paying cash? A. $965 B...
*Saturday, October 4, 2014 at 7:33pm*

**1333 math **

Probability Scores 0.2 0 0.2 2 0.05 4 0.45 7 0.1 9 Find the variance of the above random variable random variable.
*Saturday, October 4, 2014 at 7:19pm*

**math**

A jar contains 8 pennies, 3 nickels and 4 dimes. A child selects 2 coins at random without replacement from the jar. Let X represent the amount in cents of the selected coins. Find the expected value of X.
*Saturday, October 4, 2014 at 7:14pm*

**Math**

A regulation baseball bat must be 2/3/4 inches or less in diameter and shorter than 42 inches long. Which bat would not be allowed? a)diameter 6cm b) length 0.9m c)diameter 7m d)length 1.0668m d?
*Saturday, October 4, 2014 at 6:43pm*

**math**

Solve 2s^3-4r^2 if r=1 and s=5 I did 2*5*5*5=250 4*1*1=4 250-4=246 I also added 2*5^3-4*1^2=246 Am I correct? Thanks
*Saturday, October 4, 2014 at 6:36pm*

**Math**

Convert 86 inches to yards, feet, and inches? Why the inches again?
*Saturday, October 4, 2014 at 6:30pm*

**Math**

Scarlet-Camille needs three lengths of wood to finish a project. She needs one piece measuring 148 cm, one piece measuring 38 cm, and one piece measuring 42 cm. Every time Scarlet-Camille cuts a length of wood she loses 3 mm of wood. If Scarlet-Camille can only purchase lumber...
*Saturday, October 4, 2014 at 5:56pm*

**math**

Lester jogs 5 3/4 miles on each day that he jogs. Last month, he jogged a total of 115 miles. How many days did he jog last month?
*Saturday, October 4, 2014 at 5:50pm*

**Math**

1. A strip of wood 78 inches long is to be cut into pieces 3 3/4 inches long. How many pieces can be cut? A. 12 B. 26 C. 20 D. 21 C?
*Saturday, October 4, 2014 at 5:44pm*

**math evaluation **

So how am I suppose to Evaluate the expression and put it in simplest form? It's 7th grade math. The question I need help on is: -8/3 + 1/4. If u comment and show me how u got an anwser THANKS!!!!!
*Saturday, October 4, 2014 at 5:00pm*

**math**

a hall charges $30 per person for a sports banquet when 200 people attend. for every 10 extra people that attend, the hall will decrease the price by $1.50 per person. what number of people will maximize the revenue for the hall?
*Saturday, October 4, 2014 at 3:53pm*

**Math**

19. Paul can type 60 words per minute and Jennifer can type 80 words per minute. How does Paul's typing speed compare to Jennifer's? A. Paul can type 1/3 as fast as Jennifer. B. Paul can type 3/4 as fast as Jennifer. C. Paul can type 11/3 times as fast as Jennifer. D...
*Saturday, October 4, 2014 at 3:45pm*

**math**

If evies chicken lays 4 eggs in 5 days how many days will it take for evies chicken to 16 eggs?
*Saturday, October 4, 2014 at 2:39pm*

**Math**

2. Lavina wants to buy a rocking chair for $160. She will pay 10% down and pay the rest in six monthly installments. What will be the amount of each monthly payment? A. $27 B. $16 C. $24 D. $26 C?
*Saturday, October 4, 2014 at 2:15pm*

**Combinatorics (math)**

In a certain country, 40 roads lead out of each city. When all roads are open, it is possible to travel from any city to any other. Each road leads from one city to another; there are no dead end roads. If one road is closed for repairs, is it still necessarily possible to ...
*Saturday, October 4, 2014 at 12:51pm*

**Math**

-80=8b-15+5b How do I solve this and what does check mean?
*Saturday, October 4, 2014 at 12:45pm*

**Math Help**

Find the inverse of the following function algebraically. Show all work. f(x)=-5√-4x+4+2
*Saturday, October 4, 2014 at 10:28am*

**Math**

1.) An expression is show: √21x; for which value of x should the expression be further simplified? a.) 5 b.) 8 c.) 37 d.) 54 2.) An expression is show: √42x; for which value of x should the expression be further simplified? a.) 11 b.) 13 c.) 20 d.) 55
*Saturday, October 4, 2014 at 10:04am*

**Math**

What is (-7)^5 in expanded form? A. -7x-7x-7x-7x-7 B. -7.5 C. (-7)x7x(-7)x7x-7 D. 5x5x5x5x5x5x5 Is the answer A? Thanks
*Saturday, October 4, 2014 at 2:49am*

**math**

Sue needs 2/1/3 cups of flour for a batch of cookies. How many complete batches can she make with 10 cups if flour? A. 5 batches B. 3 batches C. 2 batches D. 4 batches D? Thanks
*Saturday, October 4, 2014 at 2:31am*

**math**

a 1000 seat multiplex is divided into 3 theatres. there are 310 seats in theatre A.theatre C has 180 seats then theatre B. how many seats are there in theatre b?
*Saturday, October 4, 2014 at 1:08am*

**Math**

Find the number of the sides of a regular polygon, if the measure of one of its exterior angle is between 28 and 32.
*Friday, October 3, 2014 at 11:10pm*

**Math**

If the measure of an interior angle of a regular polygon is 165, find the sum of the measures of its interior angles
*Friday, October 3, 2014 at 11:09pm*

**Math**

The sum of the measures of four of the angles of a heptagon is 520. Two of the remaining three angles are congruent. The other remaining angle is 3/2 the measure of one of the two congruent angles. Find the measures of the remaining angles.
*Friday, October 3, 2014 at 11:09pm*

**math**

Charles Sherwood(1838-1883) was an entertainer.In 1863 hermarried Lavinia Warren, who like himself was a dwarf. George W. Morrison, was the best man at the wedding. Use the following clues to find the height in inches of Charles Sherwood, his wife Lavinia and George Morrison. ...
*Friday, October 3, 2014 at 10:21pm*

**Math**

Pat and Kelly went hiking in the mountains. They started at 9,100 ft. They climbed 1,200 ft the first day, descended 900 ft the second day, and climbed 1,000 ft the third day. On the fourth day they descended 800 ft. What was the average altitude at which they hiked?
*Friday, October 3, 2014 at 10:21pm*

**math**

an average adult flea can jump 200 times the lenght of its own body. An adult flea is about 0.1 inch long. About how many feet can the average adult flea jump?If you were able to jump 200 times your height, about how many yards would you be able to jump?
*Friday, October 3, 2014 at 10:12pm*

**math**

8h x $9/h i really need help. i do not understand. Please help, Thank You in advance My work 8/h x 9/h= 72/h i dont know what to do next
*Friday, October 3, 2014 at 10:05pm*

**math**

Suppose there is a 2 degree drop in the temp for every thousand feet that an airplane climbs into the sky if the temp on the ground, which is at sea level is 64 degrees What would be the temp
*Friday, October 3, 2014 at 9:48pm*

**Math**

Rectangle ABCD has been subdivided into 4 regions. The areas of two of these regions are a^2 and 144. The combined area of the other two regions is 25a. What is the perimeter of the rectangle ABCD? Please help and show steps! I don't have a clue how to do this. Thank you ...
*Friday, October 3, 2014 at 8:50pm*

**math**

The number 57,733 contains two sets of digits in such digit is ten times as great as the other.What are the values of the digits in each set.
*Friday, October 3, 2014 at 8:42pm*

**MATH - 2ND GRADE**

Sonya has 140 beads. How many bags of 10 beads does she need so that she will have 200 beads in all?
*Friday, October 3, 2014 at 8:14pm*

**Math**

Kate is 5 years older than Lenny. Lenny is 2 years younger than Maria. Maria is twice as old as Norman. If Norman is 10 years old, how old is katie?
*Friday, October 3, 2014 at 8:11pm*

**Math**

16. If a sports shop sold 1,500 dozen golf balls last week, how many individual golf balls did the shop sell? A. 180 B. 125 C. 12,500 D. 18,000 D? 20. How many yards are in 7 miles? A. 12,320 B. 700 C. 36,960 D. 252 A?
*Friday, October 3, 2014 at 8:09pm*

**math**

if 2 chickens can lay 8 eggs in 3 days, how many eggs can 5 chickens lay in 6 days?
*Friday, October 3, 2014 at 8:08pm*

**Math**

1. Victor brought a brand new car for 750,000. IF the value of the car depreciates 20% per year, what will it be worth during the fourth year? 2. Given the terms a10 = 3/512 and a15 = 3/16384 of a geometric sequence, find the exact value of the first term of the sequence.
*Friday, October 3, 2014 at 8:04pm*

**2ND GRADE MATH**

A store sells 2 boxes of 100 pencils and some single pencils. Choose all the numbers that show how many pencils the store could sell: 1. 219, 2. 206, 3. 120, 4. 182
*Friday, October 3, 2014 at 7:46pm*

**one last difference (math)**

This time, it's decimals that i need help with. - What fraction less than 1.8 is 1.2?
*Friday, October 3, 2014 at 7:43pm*

**5th grade math**

What percent more than 2 is 16/5? Help me please
*Friday, October 3, 2014 at 7:40pm*

**math**

Shannon invests $3,000, at 8% interest, compounded quarterly for one year. Use Table 11-1 to calculate the effective interest rate for her investment. (Round the effective rate to the nearest hundredth percent.)
*Friday, October 3, 2014 at 7:28pm*

**math 156**

A company will need $35000 in 6 years for a new addition. To meet this goal the company deposits money in an account today that pays 4% annual interest compounded quarterly. Find the amount that should be invested to total $35000 in 6 years. The company should invest $□?
*Friday, October 3, 2014 at 7:19pm*

**math**

Use Gauss's approach to find the following sums ( do not use formulas). A. 1+2+3+4+...1001 B. 1+3+5+7...+99.
*Friday, October 3, 2014 at 6:57pm*

**math**

(x + 2y)^2 simplified
*Friday, October 3, 2014 at 6:23pm*

**Math **

8. The gross weight of a package and its contents is 11 pounds 5 ounces. If the packaging weighs 1 pound 15 ounces, what is the net weight of the contents? A. 12 lb. 20 oz. B. 10 lb. 5 oz. C. 9 lb. 6 oz. D. 10 lb. 6 oz. D or B?
*Friday, October 3, 2014 at 5:56pm*

**Math**

A 21-foot ladder is leaning against a building. The base of the ladder is 7 feet from the base of the building. To the nearest degree, what is the measure of the angle that the ladder makes with the ground? (Hint: Sketch the problem before solving.)
*Friday, October 3, 2014 at 5:25pm*

**Math Growth Rate w/ inflation**

In a country where inflation is a concern, prices have risen by 50 % over a 3-year period. (a) By what percent B do the prices rise each year? Find the time t it takes for prices to rise by 8% Enter your answers to two decimal places. b = ____ % t = _______ years (b) ...
*Friday, October 3, 2014 at 4:44pm*

**Math**

She jogged 3.647 miles one day and 3.003 miles the next. How much further did she jog the first day the the second day? Round answer to the nearest tenth of a mile.
*Friday, October 3, 2014 at 4:33pm*

**Math (Confused, no idea where to begin)**

The voltage V across a charged capacitor is given by V(t) = 2e^-0.16t volts, where t is in seconds (A) what is the voltage V(5) after 5 seconds? Find the time t when the voltage will be 1 volt Enter your answers to two decimal places V(5) approximately ___________ volts t ...
*Friday, October 3, 2014 at 4:20pm*

**Math**

A roofer must set up a 40-foot ladder against the side of a house. He sets the ladder so that the distance from the base of the ladder to the wall is 1/5 of the length of the ladder. To the nearest degree, what acute angle does the ladder make with the ground? (Hint: Sketch ...
*Friday, October 3, 2014 at 4:07pm*

**Math Calculous**

Q = 16.8*10^-0.22t Give the starting value a, the growth rate r, and the continuous growth rate k. Exact answer for a, Round the answer for r and k to two decimal places a = 16.8 r = 10 k = -22% Can someone check my answer? I do not think the values for r and K are correct. I ...
*Friday, October 3, 2014 at 3:43pm*

**math algebra**

Decide whether the equation has one solution, no solution or infinitely amount of solutions. 1: 2(x - 3) = 2x one none infinitely 2: 3(y - 3) = 2y - 9 +y one none infinitely 3: 10x - 2 - 6x = 3x - 2 + x one none infinitely 4(x + 3) + 2x= x - 8 one none infinitely
*Friday, October 3, 2014 at 2:59pm*

**Math**

For the function h(x) = 2cot(x/2) an expression for the value of all asymptotes is ________?
*Friday, October 3, 2014 at 2:35pm*

**Math Questions**

1.) 6√24x, for which value of x makes the expression equivalent to 18√24? a.) 3 b.) 9 c.) 12 d.) 18 My answer: C. 2.) 4√72x, for which value of x makes the expression equivalent to 24√72? a.) 6 b.) 7 c.) 36 d.) 72 My answer: A. 3.) 7√32x, for ...
*Friday, October 3, 2014 at 12:22pm*

**Math**

2. If a thermometer indicates 40 degrees Celsius, what is the temperature in degrees Fahrenheit? A. 72°F B. 54°F C. 104°F D. 22°F C?
*Friday, October 3, 2014 at 12:18pm*

**Math**

The rotating light on a lighthouse is 400 feet from a cliff. It completes one rotation every 10 seconds. The equation representing the distance, d, in feet that the center of the circle of light is from the lighthouse is d(t) = 400sec (πt/5). What is the period of d(t)? (...
*Friday, October 3, 2014 at 11:51am*

**math **

Suppose the length of time cats sleep each day is normally distributed with a mean of 15 hours and a standard deviation of 2 hours. Which groups describe 34% of the cat population? I just need help on how to do it.
*Friday, October 3, 2014 at 11:34am*

**Math**

A cylinder has a surface area of 250cm2 . The height is twice as big as the radius. What is the height of the cylinder?
*Friday, October 3, 2014 at 11:14am*

**Math**

Can someone tell me if I have this right? Thanks! Question: P varies directly as Q can be written as P = kQ. True Or False. My answer: True
*Friday, October 3, 2014 at 10:59am*

**Math**

A boy spends 32% of his money and has $120 left how much did he have at first
*Friday, October 3, 2014 at 9:58am*

**math**

i am a number between 5 and 10. my decimal is in tenths. the sum of my digits is 10. what number could i be?
*Friday, October 3, 2014 at 8:44am*

**algebra 1**

princess leia is a very good math student. Her average math grade was a 95 on her 15 tests. If Darth Mangham decides to drop her lowest grade, write an expression to determine her new test average.
*Friday, October 3, 2014 at 8:03am*

**math **

Michael's father broughthim a 16-foot board to cut into 11 equal sizes lengths for his shelves The saw blade that Michael will use to cut the board will change the length of the board by -0.125 inches for each cut. How will this affect the total length of the board?
*Friday, October 3, 2014 at 2:55am*

**math**

Sue has a total of $4000 to invest in two accounts. one account earns 2% simple interest and the other earns 5% simple interest. How much should be invested in both accounts to earn exactly $155 at the end of the year?
*Friday, October 3, 2014 at 1:33am*

**Math**

Mrs. Govin is making cakes for the school bake sale. She needs 2 cups of sugar for every cake she makes. Is the number of cakes Mrs. Govin makes proportional to to the number of cups of sugar?
*Friday, October 3, 2014 at 12:23am*

**Math**

Fun Center rents popcorn machines for $20 per hour. In addition to the hourly charge, there is a rental fee of $32. Is the number of hours you rent the popcorn machine proportional to the total cost?
*Friday, October 3, 2014 at 12:10am*

**Math**

Please check my answers I think they are right if not please tell me where I went wrong. Thanks The annual net income of general electric for the period 2007-2011 could be approximated by P(t) = 3t^2- 24t +59 billion dollars (2<t<6) where t is time in years. a) compute p...
*Thursday, October 2, 2014 at 11:55pm*

**6TH GRADE MATH**

Tony and Alice are trying to reduce the amount of television they watch. For every hour they watch television, they have to put $2.50 into savings. The table shows how many hours of television Tony and Alice have watched in the past two months. Tony watch 18.2 hours in March. ...
*Thursday, October 2, 2014 at 11:44pm*

**Math**

I don't understand how this statement is true: If AB = BC then B is the midpoint of AC
*Thursday, October 2, 2014 at 11:35pm*

**Math**

I have the following data set of 12 numbers that make up landmarks. 5,,7,7,7,8,9,10,14,15,15,16,16,17,18. How do I display them on a bar graph?
*Thursday, October 2, 2014 at 11:28pm*

**math**

A 70% acid solution is to be mixed with a 40% solution. How many gallons of each solutions are needed?
*Thursday, October 2, 2014 at 11:12pm*

**Math **

According to the U.S. Census Bureau's most recent data on the marital status of the 242 million Americans aged 15 years and older, 124.2 million are currently married and 74.5 million have never been married. If one person from these 242 million persons is selected at ...
*Thursday, October 2, 2014 at 10:20pm*

**Math Question**

Suppose that y varies inversely as x. If y = 63 when x = 3, the constant of variation is 189. True Or False?
*Thursday, October 2, 2014 at 10:05pm*

**Math**

1. t + 27 = 21 t = –6 t = 47 t = 6 t = –47 2. 24 = m – 32 m = –8 m = 56 m = 768 m = –56 3. Tamara has eaten 1,400 calories for breakfast and lunch. She has 800 more calories, c, that she can eat for dinner. Write and solve an equation to find Tamara&#...
*Thursday, October 2, 2014 at 10:02pm*

**4th grade math**

explain what do you need to do to extend number pattern?
*Thursday, October 2, 2014 at 9:50pm*

**math**

f(x, y) = 3y cos x, 0 ¡Ü x ¡Ü 2¦Ð what is the saddle point for this?
*Thursday, October 2, 2014 at 9:30pm*

**math**

explain what do you need to do to extend number pattern?
*Thursday, October 2, 2014 at 9:17pm*

**math**

Suppose that a crayon weighs the same as a marker. You have a box of crayons, 4 extra crayons, and 20 markers. Let b be the number of crayons in the box. A scale balances with all the crayons on one side and all the markers on the other. You remove markers from the scale so ...
*Thursday, October 2, 2014 at 9:14pm*

**Math **

(11/8)(-1/3) = my answer is 11/24
*Thursday, October 2, 2014 at 9:05pm*

**Math 3 quick questions**

Factor: A.). 4(3x+1)^2 -5(3x+1) +1 B.) 5(2-3x)^2 -28(2-3x)+15 C.) 2(3a-4)^2 - (3a-4)(a+2)-6(a+2)^2
*Thursday, October 2, 2014 at 9:02pm*

**6th Grade Math**

If you are given a true equation and you add the same number to each side, the resulting equation is also a true equation. If you are given a false equation and you add the same number to each side, will the resulting equation be a true equation or a false equation?
*Thursday, October 2, 2014 at 8:59pm*

**math**

Find eight team members: write the integer represented
*Thursday, October 2, 2014 at 8:59pm*

**Social Studies (SS)**

Sorry I accidentally put math but can you please Describe George Washington's expeditions into French territory.
*Thursday, October 2, 2014 at 8:56pm*

**Math**

Lisa can run a mile in 8 minutes.Which is the most resonable time for her to run a 10-km race?
*Thursday, October 2, 2014 at 8:36pm*

**Math**

When buying gasoline, you notice that 14 gallons of gasoline is approximately the same as 53 liters. Use this information to find a linear model that relates gallons to liters. Then use the model to find the number of liters in 25 gallons. Round your answer to the nearest tenth.
*Thursday, October 2, 2014 at 8:18pm*

**Math**

Lucas says that since 40x70 and 60x50 both have factors with a total of two zeros, they will both have products with a total of two zeros. Is this correct? Explain. 40x70=2800 and 60x50=3000. They both have zeros in the answer. Right
*Thursday, October 2, 2014 at 8:04pm*

**math**

Astronomers sometimes use angle measures divided into degrees, minutes, and seconds. One degree is equal to 60 minutes, and one minute is equal to 60 seconds. Suppose that <J and <K are complementary, and that the measure of <J is 48 degrees, 26 minutes, 8 seconds. ...
*Thursday, October 2, 2014 at 7:59pm*

**Math**

7/9*3 in simplest form. How do you multiply with a whole number?
*Thursday, October 2, 2014 at 7:58pm*

**Math**

Solve each problem. Blank x 10=2 tens
*Thursday, October 2, 2014 at 7:46pm*

**math**

Find the actual and approximate number days: september 8, 2008 to december 25, 2008
*Thursday, October 2, 2014 at 7:46pm*

**math**

Find the actual and approximate number days: december 8, 1972 to june 25,1980
*Thursday, October 2, 2014 at 7:41pm*

**Math**

1/6 * 5/8 in simplest form.
*Thursday, October 2, 2014 at 7:39pm*

**Math**

Find lim h->0 [f(2+h)-f(2)]/h where f(x)=|x-5|-7
*Thursday, October 2, 2014 at 7:00pm*

**math**

Select the expression that represents the statement "27 more than a number
*Thursday, October 2, 2014 at 6:50pm*

**Economics**

State of the good is pure private, pure punlic, or mixed. 1. County zoo 2. UPS Delivery 3. Air conditioning 4. Flood control projects 5. Elementary education 6. Pollution 7. Math tutor I think they are: 1. Mixed 2. Mixed 3. Mixed 4. How is a project a good? 5. Pure private 6. ...
*Thursday, October 2, 2014 at 6:38pm*

**math**

eva wants to make two pieces of pottery.she needs 3/5 pound of clay for one piece and 7/10 pound of clay for the other piece.she has three bags of clay that weigh 4/5 pound each.how many bags of clay will eva need to make both pieces of pottery?how man pounds of clay will she ...
*Thursday, October 2, 2014 at 6:08pm*

**Math**

between were erika is standing to the vertical distance from the kite is 75 meters. how high is the kite in meters a.)125 b.)100 c.)25 d.)15 My answer is c am i correct ?
*Thursday, October 2, 2014 at 5:56pm*

**Math**

If you divide a certain number by 17, the quotient is 47 and the remainder is 2. What is the number? What is the sum if all the numbers less than 496 that divides evenly into 496? The ratio of girls to boys in a class is 3:2m. If there are 35 students in the class, how many ...
*Thursday, October 2, 2014 at 5:54pm*

**Math**

hi, I need to know what interval mean I couldn't find it
*Thursday, October 2, 2014 at 5:39pm*

**Math--4 practice questions?**

1. t + 27 = 21 t = –6 t = 47 t = 6 t = –47 2. 24 = m – 32 m = –8 m = 56 m = 768 m = –56 3. Tamara has eaten 1,400 calories for breakfast and lunch. She has 800 more calories, c, that she can eat for dinner. Write and solve an equation to find Tamara&#...
*Thursday, October 2, 2014 at 5:35pm*

**Math**

Find the equation of the tangent line to the graph of y=3cot^4x at x=pi/4 3cot^4(pi/4)=3(1)=3
*Thursday, October 2, 2014 at 5:34pm*

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