Sunday

April 19, 2015

April 19, 2015

**Branches of Math**

**Recent Math Questions**

**Math**

a probability that new years is on a Saturday in a randomly chosen year is 1/7. 15 years are chosen randomly.find the probability that 1. exactly four of these years have new years day on a Saturday 2. at least 2 of these years have new years day on a Saturday
*Sunday, April 19, 2015 at 4:12am*

**math**

Aiden completed 18 out of the 25 questions on his history test. What percent of the questions did he complete
*Saturday, April 18, 2015 at 10:48pm*

**math**

Sarah was trying to figure out her grades for her math course. She only knew the grade of 4 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?
*Saturday, April 18, 2015 at 9:05pm*

**Math **

School A has 480 students and 16 classrooms, School B has 192 students and 12 classrooms. How many students would have to transfer from School A to School B for the ratios of students to classrooms at both schools to be the same? Explain your answer.
*Saturday, April 18, 2015 at 8:58pm*

**math**

what is the global maximum of the parabola y= -x^2 -12x +4
*Saturday, April 18, 2015 at 6:01pm*

**Math**

A flower bed is in the shape of a triangle with one side twice the length of the shortest side, and the third side is 18 feet more than the length of the shortest side. Find the dimensions if the perimeter is 142 feet.
*Saturday, April 18, 2015 at 2:26pm*

**Math**

In an arithmetic series, the sum of the 5th to the 8th terms inclusive is 114, whilst the sum of the 12th to 15th terms inclusive is 198. What is the 21st term? I have got 99=2a +3d and 57= 2a+3d Im not sure what to do now
*Saturday, April 18, 2015 at 2:04pm*

**Math**

Whoever can help with a question I posted earlier. I am very sorry; I put the wrong variable in the question. Question is to solve for y and not "x" as my previous message and the equation is: x = 3(r + ty) So sorry for the confusion. Please help at your earliest. ...
*Saturday, April 18, 2015 at 1:50pm*

**Math**

An artist drew a painting with similar rectangles with whole-number dimensions in inches. The small rectangle is 8 inches by 3 inches. One dimension of the medium rectangle is 9 inches. One dimension of the large rectangle is 32 inches. a. find the dimensions of the medium ...
*Saturday, April 18, 2015 at 1:43pm*

**Math**

Question asks to solve for x with equation: x = 3(r + ty) Please help with how to solve? Thank you.
*Saturday, April 18, 2015 at 1:18pm*

**math**

A salesperson earned 33,250 on annual sales of 950,000. What is her rate of commission.
*Saturday, April 18, 2015 at 1:08pm*

**math (algebra)**

An entrepreneur has the following costs and revenue functions: TC = 30 + 3Q and TR = 4Q. Calculate the equilibrium quantity algebraically and graphically at the break-even point.
*Saturday, April 18, 2015 at 12:44pm*

**math help**

A tank has two pipes entering it.when operating together,they fill the tank in 40 minutes.operating independently,one of the pipes fills the tank 60 minutes faster than the other one does. Calculate the time taken by each pipe to fill the tank on its own.
*Saturday, April 18, 2015 at 11:30am*

**math**

The data set represents the income levels of the members of a country club. Estimate the probability that a randomly selected member earns at least $98,000. 112,000 126,000 90,000 133,000 94,000 112,000 98,000 82,000 147,000 182,000 86,000 105,000 140,000 94,000 126,000 119,...
*Saturday, April 18, 2015 at 10:40am*

**math**

The Statue of Liberty is about 151 feet tall. If the angle of elevation from a tree in Liberty State Park to the statue's top is 1.5 degrees, how far is the tree from the statue? cot 1.5 DEGREES= h/ 151 151 cot 1.5= h h= ________
*Saturday, April 18, 2015 at 9:18am*

**Math**

Can you help please on the following question: "The sum of the lengths of the legs of a right triangle is 8 feet. If the length of the hypotenuse is 6 feet, find the length of the shorter leg to the nearest tenth of a foot." Thank you, Cassandra
*Saturday, April 18, 2015 at 9:14am*

**Math**

Can you help with this equation? Have to solve for the indicated variable: For x: With equation y = x + 1/x - 1; in case it doesn't make sense; the x + 1 is in the numerator and the x - 1 is in the denominator. Thank you for your help. Cassandra
*Saturday, April 18, 2015 at 8:33am*

**math**

it costs $80 to produce any quantity of output and $1.60 for any additional unit of output. write down the equation and graph the total cost function
*Saturday, April 18, 2015 at 8:26am*

**math**

The Statue of Liberty is about 151 feet tall. If the angle of elevation from a tree in Liberty State Park to the statue's top is 1.5 degrees, how far is the tree from the statue?
*Saturday, April 18, 2015 at 8:20am*

**math**

the angle of elevation from a ship to a 135-foot-tall lighthouse is 2 degrees. How far is the ship from the lighthouse?
*Saturday, April 18, 2015 at 8:17am*

**Math**

a surveyor is 3 miles from a mountain. The angle of elevation from the ground to the top of the mountain is 15 degrees. What is the height of the mountain?
*Saturday, April 18, 2015 at 8:15am*

**math**

find roots of this equation y^3-1.5y^2+0.3275
*Saturday, April 18, 2015 at 7:55am*

**math**

The 5th term of an Arithmetic Progression is 8 and the 12th term is 50. Determine the sequence
*Saturday, April 18, 2015 at 5:35am*

**Math**

A ranger at forest station A( located at latitude N47 and longitude W116 30') sights smoke from a fire in the direction of S35 36'W. At the same time a ranger at forest station B(located at latitude N48 and longitude W117 45') sights the same fire in the direction ...
*Friday, April 17, 2015 at 11:27pm*

**Math**

An artist drew a painting with similar rectangles with whole- number dimensions in inches. the small rectangle is 8 inches by 3 inches. One dimension of the medium rectangle is 9 inches. One dimension of the large rectangle is 32 inches. A. find the dimensions of the medium ...
*Friday, April 17, 2015 at 10:06pm*

**math**

solve xd^2y/dx^2+y=0 by frobenius method
*Friday, April 17, 2015 at 10:03pm*

**Math**

The angle of depression from the top of a building to a point 30 meters from its base is 24 degree. 1. Represent the above information in a diagram. 2.Calculate the height of the building.
*Friday, April 17, 2015 at 9:57pm*

**Math**

School A has 480 students and 16 classrooms. School b has 192 students and 12 classrooms. A. what is the ratio of students to classrooms at School A? 480:16 B. what is the ratio of students to classrooms at School B? 192:12 C. How many students would have to transfer from ...
*Friday, April 17, 2015 at 9:28pm*

**math**

Kerry states laps around the playground. The playground is 150 meters and 50 meters wide. How many laps will it take Kerry to state 1 km?
*Friday, April 17, 2015 at 9:07pm*

**math **

Kerry states laps around the playground. The playground is 150 m long and 50 m wide. How many laps will it take Kerry to skate 1 km?
*Friday, April 17, 2015 at 9:04pm*

**math**

When 15 is subtracted from a number,the anwser is the same as when the number is divided by 6.
*Friday, April 17, 2015 at 8:40pm*

**math**

a cubic container was completely filled with water. when 3/4 of the water from the container was poured into a rectangular tank, the tank became 1/4 full. the capacity of the tank is 1.024 liters more than that of the cubic container. Find the length of the cubic container
*Friday, April 17, 2015 at 8:23pm*

**Math**

If a = b + 2l then (b - a)^4 = ? F. -16 G. -8 H. 1 J. 8 K. 16
*Friday, April 17, 2015 at 8:00pm*

**math**

John let out 50 foot of kite string when he observes that his kite is directly above a point on the ground 30 feet away from him, how high is the kite ?
*Friday, April 17, 2015 at 7:47pm*

**Math 222**

need help understanding exponents using the product rule/ Simplifying Radicals. (a^1/2 b)^1/2 x (ab^1/2)
*Friday, April 17, 2015 at 6:44pm*

**Math 222**

I need help understanding exponents (a^1/2 b)^1/2 x (ab^1/2)
*Friday, April 17, 2015 at 6:32pm*

**math**

Suppose you want to build an outdoor rectangular pen enclosed by fencing for a pet. You want the pen to have an area of 64 square feet. Write and post one set of dimensions that could be used for the pen, along with the perimeter of the pen.
*Friday, April 17, 2015 at 6:29pm*

**Math**

Hi! Can someone help me with this? Thanks a bunch! Find the 10th partial sum of the following arithmetic sequence. 0.50, 0.9, 1.3, 1.7.....
*Friday, April 17, 2015 at 6:20pm*

**Math**

35 decimeter string is attached to both ends of a 25 decimeter pole. At what point of the string do you need to pull to make a right triangle?
*Friday, April 17, 2015 at 4:13pm*

**Math Help ASAP**

A movie complex has eight different movie theaters. The manager of the complex wants to conduct a survey to determine which snacks to add to the menu. Which represents the best sample the manager could use for the survey? Survey the first 100 moviegoers leaving the movie ...
*Friday, April 17, 2015 at 2:11pm*

**Math**

So I am supposed to solve this without using a calculator: Sqrt[20]/10 - Sqrt[10]/Sqrt[32] - Sqrt[0.3125] + Sqrt[3 + 1/5] You can put this into WolframAlpha as is to make it prettier. Answer given is 1/2 * SQRT(5) I really don't know where to start here. I have 5 sqrt ...
*Friday, April 17, 2015 at 2:06pm*

**math**

How much money must be invested at 6.3 % simple interest to earn $250 in interest each month?
*Friday, April 17, 2015 at 11:56am*

**math**

Simplify 6P2 A.30**** B.15 C.12 D.720 Simplify 8c5 A.6,720 B.336 C.56**** D.10
*Friday, April 17, 2015 at 11:37am*

**math**

Sally has a balance of $2845 on her credit card. What rate of simple interest is she being charged if she must pay $26.19 interest for the 12 days her payment is late?
*Friday, April 17, 2015 at 11:30am*

**math**

Flipo is building a rectangular sandbox for his younger brother.The length of the sandbox is 1 foot longer than twice the width of the sandbox. The perimeter of the sandbox is 29 feet
*Friday, April 17, 2015 at 10:54am*

**Math**

A toy manufacturer produces action figures and packages them into small boxes. The distribution center then puts them in larger boxes to ship them to stores. 1.) Decide which box can ship the most action figures. 2.) How many action figures fit in the box? 3.) How can they be ...
*Friday, April 17, 2015 at 10:01am*

**Math**

Kick is family drank a total of 42.5 gallons of milk in Jan and Feb. her family drank 5.3 gallons more milk in Feb than Jan. How many gallons of milk did kilos family drink in February?
*Friday, April 17, 2015 at 9:37am*

**Math**

The sum of two numbers is 70.4. One of the numbers is 9 times the other. What are the 2 numbers?
*Friday, April 17, 2015 at 9:28am*

**Math**

7. You are having a discussion about sequences with your classmate. She insists that the sequence 2, 3, 5, 8, 12 must be either arithmetic or geometric. Is she correct or incorrect? Explain.
*Friday, April 17, 2015 at 7:35am*

**math**

Of the 6796 students in one school district, 1537 cannot read up to grade level. Among a sample of 812 of the students from this school district, 211 cannot read up to grade level. Find the sample proportion of students who cannot read up to grade level. A. 0.14 B. 0.26 C. 211...
*Friday, April 17, 2015 at 7:34am*

**math**

Jody checked the temperature 12 times on Monday, and the last digit of the temperature was odd six times more than it was even. On Tuesday, she checked it 18 times and the last digit was odd eight times more than it was even. Determine which series is closer to the 50/50 ratio...
*Friday, April 17, 2015 at 7:29am*

**math**

A study of two types of weed killers was done on two identical weed plots. One weed killer killed 15% more weeds than the other. This difference was significant at the 0.05 level. What does this mean? A. The improvement was due to the fact that there were more weeds in one ...
*Friday, April 17, 2015 at 7:28am*

**math trigonometry**

A ladder 8.5m long is placed with its foot at a distance of 4m from the wall of a house and just reaches a window will . find the height of a window will and the sine and tan of the angle which the ladder makes with the wall
*Friday, April 17, 2015 at 6:46am*

**math**

On the grid,draw and label an aquarium shaped like a rectangular prism with a volume of 8,000 cubic in. HINT A CUBE I is a rectangular prism, and 2x2x2=8
*Friday, April 17, 2015 at 12:37am*

**Math**

Jon is participating in a 6 mile run/walk for charity. If she completes the course & runs at least 1/2 the distance then write an equality for walking
*Friday, April 17, 2015 at 12:04am*

**math**

A study of two types of weed killers was done on two identical weed plots. One weed killer killed 15% more weeds than the other. This difference was significant at the 0.05 level. What does this mean? A. The improvement was due to the fact that there were more weeds in one ...
*Thursday, April 16, 2015 at 11:53pm*

**math**

6X+5Y=7X+3Y=2(X+6Y-1)
*Thursday, April 16, 2015 at 11:34pm*

**Math**

6X+5Y=7X+3Y=2(X+6Y-1) solve by algebra method
*Thursday, April 16, 2015 at 11:32pm*

**5th grade (math)**

In how many different ways can five cent and eight cent stamps be used to make $2.43? In process, show the different combinations of stamps that make $2.43. In solution, tell how many ways you found. Pls help me pls.
*Thursday, April 16, 2015 at 11:18pm*

**math**

3.A poll was taken to determine the birthplace of a class of college students. Below is a chart of the results. a.What is the probability that a female student was born in Orlando? b.What is the probability that a male student was born in Miami? c.What is the probability that ...
*Thursday, April 16, 2015 at 11:17pm*

**math**

If you have a twelve gallon bucket, a seven gallon bucket, and a six gallon bucket, how can you get exactly nine gallons into one bucket
*Thursday, April 16, 2015 at 10:47pm*

**MATH 222**

I realized that I was typing the problems incorrectly. So here is the correct problem, 27^-2/3 ____________ 27 ^-1/3
*Thursday, April 16, 2015 at 10:46pm*

**Math 222**

Please I need help with this (a 1/2 b )1/2 (ab 1/2)
*Thursday, April 16, 2015 at 10:32pm*

**Math**

1.) In the following problem, write the first five of the terms of the arithmetic sequence. a1=16.5 d=0.25 2.) Find a the correct formula for the an for the arithmetic sequence. a1=-1 d=5
*Thursday, April 16, 2015 at 10:27pm*

**MATH**

A food snack manufacturer samples 15 bags of pretzels off the assembly line and weighed their contents.If the sample mean is 10.0 and the sample standard deviation is 0.15, find the 95% confidence interval of the true mean.
*Thursday, April 16, 2015 at 10:06pm*

**Math**

A frequency, F, varies inversely as wavelength, w. The constant of variation is speed, S. Write a formula to express this relationship
*Thursday, April 16, 2015 at 10:04pm*

**MATH 222**

I need help with solving expressions with exponents (a 1/2 b )1/2 (ab 1/2)
*Thursday, April 16, 2015 at 9:51pm*

**Math**

Rate varies inversely as time. Sandy rode her bicycle to Micah's house at a rate of 5 mi/h. She returned home at a rate of 4 mi/h. If the first leg of the trip took 20 minutes how long did the second leg of the trip take
*Thursday, April 16, 2015 at 9:45pm*

**Math**

Chad buys peanuts into pound bags Siri packages them into bags that hold 56 pounds of peanuts how many 2 pound bags of peanuts should Chad by so that he can fill the 56 pound bags without having anything that's left over
*Thursday, April 16, 2015 at 9:42pm*

**Math 222**

Using the Rules of Exponents. Please show me how to simplify each expression. 27 -2/3 ____ 27 -1/3
*Thursday, April 16, 2015 at 9:41pm*

**Math**

The mass of a given object varies inversely as the acceleration of the object. A cart with a mass of 40 g has an accelerationo 2.5 m/s^2. What is the acceleration of a 50 g cart?
*Thursday, April 16, 2015 at 9:39pm*

**Math**

During normal breathing, about 12% of the air in the lungs is replaced after one breath. Write an exponential decay model for the amount of the original air left in the lungs if the initial amount of air in the lungs is 500 mL. How much of the original air is present after 240...
*Thursday, April 16, 2015 at 9:37pm*

**Math**

Bacteria can multiply at an alarming rate when each bacteria splits into two new cells, thus doubling. If we start with only bacteria which can double every hour, how many bacteria will we have by the end of the day?
*Thursday, April 16, 2015 at 9:28pm*

**Math**

The population of Winnemucca Nevada can be modeled by P=6191(1.04)^t where t is the number of years since 1990. What was the population in 1990? By what percent did the population increase by each year?
*Thursday, April 16, 2015 at 9:23pm*

**math**

The surface area of a rectangular prism is 729 square meters. What is the surface area of a similar prism that has edge lengths that are larger by a scale factor of 3
*Thursday, April 16, 2015 at 9:22pm*

**Math**

My problem is: "Will ran four miles on his first day of training. The next day he ran 1/3 of that distance. How far did he run the second day" I need help. I think it is either 1 or it is 3 and 1/4. I'm undecided.
*Thursday, April 16, 2015 at 9:20pm*

**Math**

Determine whether this sequence is arithmetic or geometric. Find the next three terms. 4. 3, 12, 21, 30, .... A.40, 50, 60 B.38, 46, 54 C.39, 48, 57 D.36, 32, 39 A? Thank you
*Thursday, April 16, 2015 at 9:09pm*

**Math**

3.Josh has a huge marble collection. He counts 280 marbles that are red, and he estimates that this is about 10% of his collection. A.Write and solve a proportion to estimate the total number of marbles Josh has.
*Thursday, April 16, 2015 at 9:07pm*

**Math**

Ian gets $9 for each hour he works and $10for each day he works. To find out how much he makes in a day, he made the equation y=9x+10x, where x is the number of hours he works. Explain why Ian's equation will not tell him how much he makes in a day.
*Thursday, April 16, 2015 at 9:03pm*

**Math**

Determine whether this sequence is arithmetic or geometric. Find the next three terms. 81, 27, 9, 3, . . . A. arithmetic, 0, –3, –6 B. geometric, 0, –3, –6 C. geometric, 1,1/3 , 1/9 D. The sequence is neither geometric nor arithmetic. Is the answer C? Thank...
*Thursday, April 16, 2015 at 8:58pm*

**Math **

Mia took a test with 60 multiple-choice questions. Her teacher told her she got 88% correct. A.Write and solve a proportion to figure out how many questions she got correct.
*Thursday, April 16, 2015 at 8:45pm*

**math word problem**

You are in a car. The car begins your journey by traveling 3 miles south in a straight path. The car then travels 9 miles east in a straight path and then turns and travels another 9 miles south in a straight path to end the journey. What is the straight-line distance between ...
*Thursday, April 16, 2015 at 8:30pm*

**Math**

Determine whether each sequence is arithmetic or geometric. Find the next three terms. -4,8,-16,32... A. Arithmetic, 64,128,256 B. Geometric, -64,128,-256 C. Geometric, -48,64,-80 D. The sequence is neither arithmetic nor geometric sequence. B? Thank you
*Thursday, April 16, 2015 at 8:23pm*

**math**

If you take 13 boxes to postoffice and each weigh 2/3 of pound what is total weight
*Thursday, April 16, 2015 at 8:20pm*

**Math**

1.A restaurant surveys 60 of its customers about their new menu. 48 of the customers that take the survey prefer the new menu. A.Which value is unknown in this problem: the part, percent, or whole? B.Write and solve the proportion to find the percent of the customers that ...
*Thursday, April 16, 2015 at 8:16pm*

**4th grade math**

the area of a rectangular rug is 24 square feet. The perimeter is 28 feet. What are the dimensions of the rug?
*Thursday, April 16, 2015 at 8:12pm*

** math**

LeanNE walks at an average speed of 3 1/3 mph. How far does she walk in 2hrs 15 minutes? 10/3 × 9/4 == 90/12 would equal 7 1/2 miles
*Thursday, April 16, 2015 at 8:04pm*

**Math**

Determine whether each sequence is arithmetic of geometric. Find the next three terms. 14,19,24,29.... A. Geometric,34,39,44 B. Arithmetic,32,36,41 C. Arithmetic, 34,39,44 D. This sequence is neither arithmetic or geometric. Is the answer C? Thank you
*Thursday, April 16, 2015 at 7:45pm*

**Math**

Eddie measured his aquarium using a small fish food box. The box has a base area of 6 inches and a height of 4 inches. Eddie found that the volume of his aquarium is 3,456 cubic inches. How many boxes of fish food could fit in the aquarium?
*Thursday, April 16, 2015 at 7:35pm*

**math**

hamid has 2 qt container of grape juice tell two ways that hamid can divide the grape juice into 5 containers
*Thursday, April 16, 2015 at 7:29pm*

**Math**

The length of a blue ribbon is two-thirds the length of the red ribbon.The blue ribbon is 30 cms long.Write an equation you can use to find the length of r the red ribbon
*Thursday, April 16, 2015 at 7:25pm*

**math word problems**

Q. Marissa had a doctors appointment last Friday. the bill for her visit came to $345. Her family's health insurance will pay 80% of the bill. What is the dollar figure that Marissa's family will have to pay?? - A. Do I divide...?
*Thursday, April 16, 2015 at 7:16pm*

**Math**

Dakota says the point on the number line shown here is 4/5. His teacher says that he is reading the number line incorrectly. What is Dakota's error? What is the correct fraction?
*Thursday, April 16, 2015 at 7:00pm*

**math**

Suppose there are 2 pieces of the cake left over,but you don't know how many pieces were in the whole cake. Explain how you could find the number of pieces in the whole cake if Taylor told you 1/6 of the cake was left. You may show your work in a drawing.
*Thursday, April 16, 2015 at 6:55pm*

**Math**

Lin earns $12 an hour. She wants to buy a new MP3 player. She is considering models that cost at least $84. Writ an inequality that describes how many hours Lin needs to work to be able to buy the player. Explain the answer.
*Thursday, April 16, 2015 at 6:35pm*

**math 8th!**

point A (-2,3) lies on a line with a slope of 2. Describe how to find two points on the line on either side of A.
*Thursday, April 16, 2015 at 6:28pm*

**Math.**

Which roof is steeper: a roof with a rise of 12 and run of 7 or a roof with a rise of 8 and a run of 4?
*Thursday, April 16, 2015 at 6:22pm*

**Math question**

to prepare for a presentation Pete colored one half of a poster Rebecca colored third of the poster what fraction still needs to be colored
*Thursday, April 16, 2015 at 5:49pm*

**Math **

A construction crew wants to hoist a heavy beam so that it is standing up straight. They tie a rope to the beam, secure the base, and pull the rope through a pulley to raise one end of the beam from the ground. When the beam makes an angle of 40 degrees with the ground, the ...
*Thursday, April 16, 2015 at 5:06pm*

**MATH**

Suppose that you work at the Peacock Blue store for 40 hours over five days at a rate of $9.25/hour. You then quit your job. Deductions are FICA (7.65%), federal withholding (12%), and state withholding (8%). Your expenses are transportation at $5.25/day, lunch at $3.85/day, ...
*Thursday, April 16, 2015 at 5:02pm*