Tuesday

September 23, 2014

September 23, 2014

**Branches of Math**

**Recent Math Questions**

Post a New Question | Current Questions

**math**

y= tan((pi x)/2) what is the domain of y? My ans. is x= 1/2+k ;k is Z Is it correct Please help!!!
*Thursday, September 4, 2014 at 1:01am*

**Math!**

The initial amount of sugar in fermenting a batch of beer is 5.5 grams. Over time the sugar decreases at a rate of 0.1grams per day. a.What is the amount of sugar that remains after 7 days? 23 days? - I got: 5.5-0.1x= A - 5.5-0.1(7)= 4.8 - 5.5-0.1(23)= 3.2 b. If A represents ...
*Thursday, September 4, 2014 at 12:13am*

**7th grade math**

identify a value of x for which sum of 3+x is positive
*Wednesday, September 3, 2014 at 11:52pm*

**Math**

Which of these equations would not be in quadratic form? A.X^4-13X^2+36=0 B.2X^(2/5)+X^(1/5)-6=0 C.6x^3+2x^2-8X=0 D.3(2/x-4)^2+5(2/x-4)-2=0 I think its between C or D. C because the exponents are different not doubled and D because its set up is completely the opposite from ...
*Wednesday, September 3, 2014 at 10:59pm*

**math**

Find each unit rate. Round to the nearest hundredth if necessary. 357 miles in 6.3 hours
*Wednesday, September 3, 2014 at 10:48pm*

**math**

The least common multiple of two numbers is 60 and one of the other number is 7 less than the other number what are the numbers justify your answer
*Wednesday, September 3, 2014 at 10:26pm*

**math**

A coin bank contains twice as many nickels as quarters, three times as many pennies as quarters, and no dimes. If the bank contains $7.60 how many of each coin does it contain ?
*Wednesday, September 3, 2014 at 9:44pm*

**Math 130**

A Students says that 3 1/4 % = 0.03 + 0.25 = 0.28. Is this correct? Why or why not? So I got .0235 and I don't think this is correct
*Wednesday, September 3, 2014 at 9:24pm*

**Math**

Matt who stands at 68 inches tall casts an 8 foot shadow at the same time a pear tree casts a 21 foot shadow. How tall is the tree?
*Wednesday, September 3, 2014 at 9:22pm*

**Math 112**

A student argues that 0.01% = 0.01 because in 0.01%, the percent is already written as a decimal. How do you respond?
*Wednesday, September 3, 2014 at 9:19pm*

**math**

(3+10)+(3)+(10)
*Wednesday, September 3, 2014 at 9:13pm*

**Math**

Noella read that women used to make 75 cents for every dollar that men made. She says that this means that men were paid 25% more than women. Is she correct?
*Wednesday, September 3, 2014 at 9:11pm*

**7th grade math**

when x is nonzero integer the sum 0f 3+x is sometimes negative and sometimes positive. Identify a value of x for which the sum of 3+x is negative.
*Wednesday, September 3, 2014 at 9:10pm*

**Math**

is the least common multiple of any number n and 1 is n?
*Wednesday, September 3, 2014 at 8:43pm*

**Math**

Is the GCF factor of any number n and 1 is n?
*Wednesday, September 3, 2014 at 8:41pm*

**Math **

What are these fractions listed from least to greatest: 1/7,1/9,2/7,1/12?
*Wednesday, September 3, 2014 at 8:24pm*

**math**

find each unit rate. Round to the nearest hundredth if necessary. 8 batteries in 3 months
*Wednesday, September 3, 2014 at 8:19pm*

**Math**

FACTOR 6x^3+2x^2-8x =0 I know the GCF is 2x thus leaving: 2x(3X^2+X-4X)=0 *Stuck after this part*
*Wednesday, September 3, 2014 at 8:11pm*

**Math**

x(.6917)+(1.0318x)(.3083)=63.546 Solve for x
*Wednesday, September 3, 2014 at 8:09pm*

**math**

The ratio of red jelly beans to yellow jelly beans in a dish is 3.4. If Greg eats 3 red ones and 6 yellow ones, the ratio is 4.5. How many yellow jelly beans were originally in the dish? Do you make 3.4 a fraction and 4.5 a fraction and times them? 3/6 TIMES 4.5 = 12/20 THEN ...
*Wednesday, September 3, 2014 at 8:02pm*

**Math**

amy is building a house. the basement floor is at -15 feet. the roof of the house is above 25 feet. express the comparison of height as an inequality. explain the meaning of the inequality
*Wednesday, September 3, 2014 at 7:55pm*

**math help!!**

factor: 9n^2-25
*Wednesday, September 3, 2014 at 7:46pm*

**8th grade math**

a square photo display board is made up of 60 rows of 60 photos each. the area of each square is 4 in. how long is each side of the display board?
*Wednesday, September 3, 2014 at 7:21pm*

**Math**

My other number is even. My number is less than 300. Using 2,4,5
*Wednesday, September 3, 2014 at 7:12pm*

**math**

a gallon of stain can cover a square deck with an area of 300 square feet. about how long is each side of the deck? round to nearest foot.
*Wednesday, September 3, 2014 at 6:57pm*

**Math. Help Thanks!**

Hot dogs and Hamburgers: 1.) The caterer for your class picnic charges $1 for each hotdog and $2 for each hamburger. You have $48 to spend. Write a model that shows the different numbers of hot dogs and hamburgers that you could purchase... 2.) Airplane landing: An Airplane&#...
*Wednesday, September 3, 2014 at 6:45pm*

**stonegate math**

I m a 4- digit number. My ones digit is 2. My ten digit is 4 great than my ones digit. My hundreds and thousands digit are both 3 greater than my ones digit. What number am I
*Wednesday, September 3, 2014 at 6:25pm*

**Math**

The school band is comprised of middle school students and high school students, but it always has the same maximum capacity. Last year the ratio of the number of middle school students to the number of high school students was 1:8. However, this year the ratio of the number ...
*Wednesday, September 3, 2014 at 6:14pm*

**Math**

How can you make 83c using only pennies, nickels,dimes ,or quarters
*Wednesday, September 3, 2014 at 6:11pm*

**math**

a pharmacist failed to place the balance in equilibrium before weighing 200mg of a drug. later, he discovered a 20% error was incurred. If the balance pan on which he placed the drug to be measured was heavy, how much of the drug in milligrams did he actually weigh?
*Wednesday, September 3, 2014 at 6:10pm*

**5th grade math**

Bianca is making scarves to sell. She has 33 pieces of blue fabric, 37 pieces of green fabric, and 41 pieces of red fabric. Suppose Bianca uses 3 pieces of fabric to make 1 scarf. How many scarves can she make?
*Wednesday, September 3, 2014 at 6:08pm*

**math**

a pharmacist measures 60mL of glycerin by difference, starting with 100mL. After completing the measurement, he notes the graduate he used contained 45mL of glycerin. calculate the percentage of error incurred in the measure.
*Wednesday, September 3, 2014 at 5:41pm*

**Math. HELP!**

Hot dogs and Hamburgers: The caterer for your class picnic charges $1 for each hotdog and $2 for each hamburger. You have $48 to spend. Write a model that shows the different numbers of hot dogs and hamburgers that you could purchase.
*Wednesday, September 3, 2014 at 5:40pm*

**math**

four people invested in a restaurant. one person invested $1000,000. two others invested in the ratio x:2x, and the fourth person invested an amount equal to the other three investors combined. the total investment was $1,100,000. A. write an expression for the amount invested...
*Wednesday, September 3, 2014 at 5:34pm*

**math**

simply (ab) cubed/ (3a) squared * b
*Wednesday, September 3, 2014 at 5:33pm*

**math**

Simplify the numerical expression below 25-4×5
*Wednesday, September 3, 2014 at 5:33pm*

**Math**

Locate the square root of negative 15 and the square root of 94 cubed to three decimal places on a number line using rational approximations
*Wednesday, September 3, 2014 at 5:33pm*

**Math**

6.837>6.83_>6.835
*Wednesday, September 3, 2014 at 5:20pm*

**math**

if a bag has 2 red balls 2 blue balls 2 green balls what is your chance of getting a red ball
*Wednesday, September 3, 2014 at 5:14pm*

**Math**

Randi takes the stairs at work whenever possible instead of the elevator. She must climb up 51 steps from her office to get to the accounting department. The human resources department is 34 steps below her office. How many steps are there between human resources and accounting?
*Wednesday, September 3, 2014 at 5:09pm*

**math**

Jasmine has 8 packs of candle wax to make scented candles .each pack contains 14 ounces of of wax.jasmine uses 7ounce of wax to make one candle .how many candles can she make?
*Wednesday, September 3, 2014 at 4:10pm*

**math**

What % of $3.75 is $1.50?
*Wednesday, September 3, 2014 at 4:05pm*

**Math**

How do you find the GCF from 55 + 22 = and rewrite the sum using the Distributive Property?
*Wednesday, September 3, 2014 at 3:53pm*

**Math**

How do I explain how to put numbers in order least to greatest? (HATE BCR's!!!)
*Wednesday, September 3, 2014 at 3:32pm*

**math**

So, I have to turn the quotient answer into scientific notation.. (answer has to be in scientific notation) 6x10^24/ 8x10^8 - 7.5 x 10^2 - 7.5 x 10^15 - 0.75 x 10^3 *This is the one I pick* - 0.75 x 10^16
*Wednesday, September 3, 2014 at 2:17pm*

**Math**

A telephone pole anchored to the ground by a cable called guy wire at a point of 5m from the base of the pole. The wire make an angle of 72.5 with the horizontal. What is the height of the pole where the guy wire is attached to the pole?
*Wednesday, September 3, 2014 at 12:26pm*

**Math/chem**

If the temperature of a solution goes up 25degrees in 7 minutes, what is the rate of change of temperature? (Rate= temp. Change/ time)
*Wednesday, September 3, 2014 at 11:53am*

**Math**

Ravi is thinking of a 2 digit number.The number is between 40 and 50.the sum of digits in tens and ones place 13. What is the number that Ravi is thinking of? Answer 11 am i rite
*Wednesday, September 3, 2014 at 9:17am*

**math urgent please**

A fish tank in the shape of a cuboid has length 320 cm. Its length is twice that of its width. To enhance viewing, the area of the four vertical faces should be maximized. Find the optimum "viewing area" of a fish tank that is fixed to the wall so that the area of ...
*Wednesday, September 3, 2014 at 8:44am*

**math**

Highway engineers often use quadratic functions to model safe distance for cars. For example, f(x)= 1/2 x^2 + 4/5x is sometimes used to model the stopping distance for a car traveling at X miles per hour on dry, level pavement. If a driver can see only 200 ft ahead on a ...
*Wednesday, September 3, 2014 at 8:20am*

**math**

joash was 7,uziah was 16,ahaz was 20,manasehcwas 12,josiah was 8,and jehoichin was 18. what was the sverage age of these young men when they became kings of juddah
*Wednesday, September 3, 2014 at 7:56am*

**math**

A dollar bill is 1.1 x 10-4 meters thick. If you stacked 53,000,000,000 dollar bills, how high would the stack be? (Hint: put both in scientific notation form and use the laws of exponets to multiply) answer: 5,830,000 meters thick
*Wednesday, September 3, 2014 at 7:56am*

**math**

Find the x-intercept and y-intercept (zeroes of the function) 1.) P(x)=x^4- 9x^2 2.) P(x)= 2(x-5)(x+2)^2
*Wednesday, September 3, 2014 at 5:41am*

**math**

find the base of the exponential function whose graph contains the given points. 1.( 4, 1/625) 2.(3/2, 27) 3.(3, 1/343)
*Wednesday, September 3, 2014 at 5:38am*

**math**

in december, the average total rainfall in all the desert together is 0.89mm. explain how to use the figures from the table to write a comparison of the total desert rainfall in august and december. Table: reno-0.19mm sahara-0.17mm mojave-0.1mm tempe-0.24mm
*Wednesday, September 3, 2014 at 2:26am*

**math**

in december, the average total rainfall in all the desert together is 0.89mm. explain how to use the figures from the table to write a comparison of the total desert rainfall in august and december.
*Wednesday, September 3, 2014 at 2:25am*

**Math**

Which is greater the greatest whole number with 4 digits or the least whole number with 5 digits?
*Wednesday, September 3, 2014 at 12:17am*

**Math**

A is 3 1/4 % = 0.03 + 0.25 = 0.28. Is this correct? Why or why not? So I got .0235 and I don't think this is correct
*Wednesday, September 3, 2014 at 12:14am*

**math**

find the domain, range, y and x-intercept, vertical asymptote, maximum, minimum, one-to-one, and horizontal asymptote of: a. f(x)=x^2-6x+5 b. f(x)=x^2-6x+5 on domain [-1,6]
*Wednesday, September 3, 2014 at 12:10am*

**Math**

A gardener has 120 ft of fencing to fence in a rectangular garden. one side of the garden is bordered by a river and so it does not need any fencing. 1. what dimensions would guarantee a garden with an area of 1350 ft^2? 2. What dimensions would guarantee the greatest area? ...
*Tuesday, September 2, 2014 at 11:43pm*

**math**

Jessie has a box of 1000 marbles 75 are yellow 230 are red 331 are blue and 364 are green what fraction of his marbles are yellow and what fraction of his marbles are red
*Tuesday, September 2, 2014 at 11:38pm*

**Math**

How many pieces of carpet can be cut from the roll if each piece is to be 2/5 meter long?
*Tuesday, September 2, 2014 at 11:31pm*

**Math 112**

There are 100 employees in a room. 99% are managers. How many managers must leave the room to bring down the percentage of managers to 98%?
*Tuesday, September 2, 2014 at 11:29pm*

**math**

Jessie has a box of 1000 marbles . He has 75 yellow , 230 red, 331 blue and 364 green what fraction of his marbles are yellow? What fraction of his marbles are ref?
*Tuesday, September 2, 2014 at 11:24pm*

**SIXTH GRADE MATH**

Sam's credit card balance is less than -$36. Does Sam owe more or less than $36? The answer he owe more than $36.
*Tuesday, September 2, 2014 at 11:16pm*

**Math\ álgebra **

A couple wants to install a sqaure mirror that has an área Of 500 square inches. To the nearest tenth Of an inch, what lentgth Of wood trim is needed to go around the mirror ?
*Tuesday, September 2, 2014 at 11:01pm*

**math**

What is the quotient of 0.9÷756?
*Tuesday, September 2, 2014 at 10:57pm*

**Math**

It can't possibly be 68 quarters? If I was to divide 17/0.25= 68, is that the final answer???!! Or do I have to then divide 68 by 4??
*Tuesday, September 2, 2014 at 10:57pm*

**sixth grade math problem**

Bertrand collects movie posters. The number of movie posters in his collection changes each month as he buys and sells posters. The table show how many posters he brought or sold in the given months. January sold 20, February bought 12, March bought 22, April sold 28. 1. Which...
*Tuesday, September 2, 2014 at 10:48pm*

**math/stats**

What is the standard deviation of a $1 bet on any one particular number, e.g., 33, in the game of American roulette? Notice the payoff is 35:1 for this type of bet.
*Tuesday, September 2, 2014 at 10:46pm*

**Math **

Josh needs to know how many quarters will give him $17.00.
*Tuesday, September 2, 2014 at 10:37pm*

**math**

Is the amount of tax collected proportional to the cost of an item after tax has been added?explain
*Tuesday, September 2, 2014 at 10:35pm*

**math**

Pamela Mello is paid on an incremental commission schedule.She is paid 2.6% on the first $60,000 and 3.4% on any sales over $60,000. If her weekly sales volume was $89,400, what was her total commission?
*Tuesday, September 2, 2014 at 10:09pm*

**math**

Ricky has a total of 64 pennies and quarters in a jar. He has 34 more pennies than quarters. How much money does ricky have in the jar
*Tuesday, September 2, 2014 at 9:56pm*

**Math**

Simplify each expression. Write your answer using a postive exponent. 1.2^0 divided by 1.8 ^2
*Tuesday, September 2, 2014 at 9:50pm*

**6th Grade Math**

Can someone please show me how to work this problem below? Jacob earned $80 babysitting and deposited the money into his savings account. The next week he sepnt $85 on video games. Use the integers to describe the weekly changes in Jacob's saving account balance.
*Tuesday, September 2, 2014 at 9:26pm*

**Math**

if a rectangle has a perimeter of 65 and the ratio is 2:5 what is the perimeter of the smaller rectangle? 65/5=13 13x2=26 is that the answer or am I missing a step.
*Tuesday, September 2, 2014 at 9:19pm*

**Math**

Olivia's chessboard is 11 sq centimeters. A chessboard. Has 8 sq on each side. To the nearest tenth what is the width of the chessboard
*Tuesday, September 2, 2014 at 9:11pm*

**math**

this 7-digit number is 8,920,000 when rounded to the nearest ten thousand. the digits to the tens and hundreds places are the least and same value. the value of the thousands digit is double that of the ten thousands digit. the sum of all its digits is 24.
*Tuesday, September 2, 2014 at 8:46pm*

**math**

Find each unit rate. Round to the nearest hundredth if necessary. 5 pounds for $ 2.49
*Tuesday, September 2, 2014 at 8:36pm*

**MATH**

make up a set of 5 numbers having the following landmarks: median: 9, range: 7, minimum:5
*Tuesday, September 2, 2014 at 8:25pm*

**math**

Identify the solutions of the systems of equations, if any. X+2y=7 3x-4y=6 A.(4,2/3) B.(4,3/2) C.(2/3,4) D.(3/2,4)
*Tuesday, September 2, 2014 at 8:21pm*

**math**

Sarah and Felipe were playing video games. Sarah scored 21,456 points, and Felipe scored 9,087 points. About how many points did Sarah and Felipe score altogether?
*Tuesday, September 2, 2014 at 8:07pm*

**math**

Identify the solutions of the system of equations, if any. X+2y=7 3x-4y=6
*Tuesday, September 2, 2014 at 8:03pm*

**math**

Identify the solutions of the systems of equations, if any. -4x-4y=8 4y=-4x-8 No solution (0,-2) (-2,0) Infinitely many solutions
*Tuesday, September 2, 2014 at 7:52pm*

**Math**

Write the numbers: 70 million 16 thousand 90 32 billion 232 thousand
*Tuesday, September 2, 2014 at 7:48pm*

**Math**

Factor the following number to it's prime factor: 40
*Tuesday, September 2, 2014 at 7:42pm*

**math**

Sarah and Felipe were playing video games. Sarah scored 21,456 points, and Felipe scored 9,087 points. About how many points did Sarah and Felipe score altogether?
*Tuesday, September 2, 2014 at 7:30pm*

**math**

a ship sails 145 kms on a bearing of 215 degrees. how far south of its starting point is the ship.
*Tuesday, September 2, 2014 at 7:25pm*

**math**

The Bobcats football team gained seven yards,lost eight yards and than lost seven more yards.what is the net result of these three plays
*Tuesday, September 2, 2014 at 7:21pm*

**math/algebra**

I am having a hard time with math I cant get it. Write each rational number as a terminating decimal. 19/20, 1/8, & 17/5 can you please help!!
*Tuesday, September 2, 2014 at 7:15pm*

**Math**

Sorry if this is a lot of questions but What do you hear when you hear the word math? What do you believe when you hear the word math? What do you think when you hear the word math?
*Tuesday, September 2, 2014 at 7:14pm*

**math**

A book publisher is shipping a new book in boxes of 200. If 30 boxes fit in 1 shipping crate, how many books are in 20 shipping crates? Explain the mental math you used to solve the problem.
*Tuesday, September 2, 2014 at 6:45pm*

**math**

range of 10,8,4,5,8,6,12and1
*Tuesday, September 2, 2014 at 6:27pm*

**math**

Given the graph of y=f(x) 1. y = (-f) **I think this is that you reflect across the x-axis. 2. y = f(-x) = f(x) even I'm not sure. 3. y = -f(x) = f(-x) odd Not sure either.
*Tuesday, September 2, 2014 at 6:23pm*

**math**

John dog weighs 13 pounds. Lois dog weighs 12 pounds more than John dog.How much does Lois dog weighs?
*Tuesday, September 2, 2014 at 6:12pm*

**math 3**

Lola is placing appetizers on plates. she has 63 spring rolls and 84 cheese cubes. she wants to include both appetizers on each plate. Each plate must have the same numbers of spring rolls and cheese cubes. what is the greatest number of plates she can make using all of the ...
*Tuesday, September 2, 2014 at 6:12pm*

**Math 3**

for football tryouts at a local school, 12 coaches and 42 players will split into groups. each group will have the same numbers of coaches and players. what is the greatest number of groups that can be formed? how many coaches and players will be in each of these groups?Please...
*Tuesday, September 2, 2014 at 6:09pm*

**Math 2**

The middle school band has 56 members. The high school band has 96 members. the bands are going to march one after the other in a parade. the director wants to arrange the bands into the same number of columns. What is the greatest number of columns in which the two bands can ...
*Tuesday, September 2, 2014 at 5:36pm*

**Math**

Tell whether the function is linear. Then evaluate the function for the given value of x. 6.) f(x)= 3-3x; f(2) 7.) f(x)= | x+2 | ; f(-4) 8.) f(x)= 2/x-2; f(6) 14.) f(x)=2/3x-5 ; f(9) Can someone help me with these^^. please write the QUESTION # SO I know which one the answer ...
*Tuesday, September 2, 2014 at 5:24pm*

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