Monday

September 1, 2014

September 1, 2014

Total # Posts: 69,983

**algebra**

2x-x^3>=0 solve for x
*May 28, 2014*

**College Algebra **

x/(2x-4)-7=1/(x-2).. How I clear this denominator if I must clear it at all.. Im not sure how to approach these problems.I have several others similar to this 1/2y+ 4= 1/7y I changed the denominators to 14y, then got 7/14y+ 4= 2/7y but my online homework says that is incorrect...
*May 28, 2014*

**College Algebra **

7/(x+1) - 3/2 =6/(3x+3) Im not sure how to begin, I thought abou clearing the denominators by multiply everything by (x+1)(2)(3x+3) but that didnt work out.
*May 28, 2014*

**penn foster**

When three lilies are arranged in a pattern in which the largest lily is lowest and the next one up is smaller and the next one is even smaller than the second, the designer is using the technique called
*May 28, 2014*

**College Algebra **

2/9+-5/6= -8 -(-3/7 k) The answer I got found was 82k=-903 I then divided that by 82 and found k=-11.0121. Which was incorrect, please help me.
*May 28, 2014*

**physics**

The power output of a star is 7.22 x 1028 watts. Every 47.0 seconds, the star converts _________ kg of its mass into energy.
*May 28, 2014*

**geometry**

Rewrite the following in If-then form: the product of x and y is an odd multiple of 5
*May 28, 2014*

**College Algebra **

Let Z be equal to (2-5i) The question is z^2 +iz -(5+i) The answer I got for this was -22 + 18i but it isn't correct on my homework page please help/
*May 28, 2014*

**College Algebra **

Write the following in a+bi form (-5-i)/(3-3i) -5/3 and 1/3i (-5/2i)/(-1/5i) 23 and 0i (-2i)^3 -2 and 0 Im having trouble with these probems and here is my answers. PLEASE HELP
*May 28, 2014*

**College Algebra **

Write the following a+bi form i(3.14-3i) Please help. I believe that the answer is 3.14i-3i, which would be (3.13*-1)-3*-1. however this was incorrect please tell me where I went wrong
*May 28, 2014*

**Science**

1. Which of the following is evidence that groundwater cause erosion and deposition ? a) the formation of meanders b) the formation of large boulders in the desert c) the formation of alluvial fans d) the formation of stalagmites and stalactites in caverns <----
*May 28, 2014*

**Math**

Here are 5 questions I cannot figure out 1. Is every parallelogram a square? 2.Is every rhombus a square? 3. Is every square a rhombus? 4. Is every rectangle a parallelogram? 5. Is every rectangle a rhombus? Thank you so much for answering
*May 28, 2014*

**MATH**

Ido not know how to do this. A jar contains 5 green erasers, 2 striped erasers, 4 pink erasers, and 3 white erasers. You select an eraser at random. What is P(not pink)? (1 point)
*May 28, 2014*

**Science**

Which of the following statements describes the difference between physical and chemical weathering? Chemical weathering changes the composition of a rock, while physical weathering does not.
*May 28, 2014*

**Science**

How is an area’s topography determined? B. By using an areas elevation relief and landforms How do Global Positioning Systems use elevation points on Earth’s system to find latitude and longitude? A. By using signals form a network of satellites How are lakes and ...
*May 28, 2014*

**Science**

Which part of the ocean floor is part of the continuous underwater mountain range that circles Earth? B. Mid-ocean ridge Which of the following statements describes the difference between physical and chemical weathering? B. Physical weathering is caused by ice, while chemical...
*May 28, 2014*

**Science**

How is an area’s topography determined? B. By using an areas elevation relief and landforms How do Global Positioning Systems use elevation points on Earth’s system to find latitude and longitude? A. By using signals form a network of satellites How are lakes and ...
*May 28, 2014*

**math**

After flying at an altitude of 9 kilometers, an airplane starts to descend when its ground distance from the landing field is 175 kilometers. To the nearest degree what is the angle of depression for this portion of the flight?
*May 28, 2014*

**Math**

No, its just one. On my paper it says: 16. A jar contains 120 beads a. What is the angle measure for orange. I got 144. b. How many red beans are there? On the graph it shows the angle measure is 66
*May 28, 2014*

**Math**

A jar contains 120 beads. b. How many red beans are there? The angle degree is 66, how would I find this out? I don't know how to.
*May 28, 2014*

**economics**

are there any welfare or subsidy payments that should be reviewed or added
*May 28, 2014*

**math**

Suppose f(x) = x^3 on the interval [1, 4]. Use the Mean Value Theorem to find all values c in the open interval (1, 4) such that f'(c)= (f(4)-f(1))/4-1 c= square root of 7 c= cubed root of 21 c = 7 Mean Value Theorem does not apply
*May 28, 2014*

**calculus**

Identify the open intervals) where the function f of F(x)= x√10-x^2 is increasing.
*May 28, 2014*

**American government **

the first news about the monica lewinsky scandal appeared: A on FM radio morning jockey shows. B on prime-time news C on CNN D through posts on the internet
*May 28, 2014*

**calculus**

A golf ball is hit off the top of a cliff that is 75 feet tall at an angle of 45° to the horizontal with an initial velocity of 80 feet per second. The quadratic equation shown below models the height, h(x), of the ball when it is x feet from the cliff’s edge. How far...
*May 28, 2014*

**Geometry**

Abcd is a parallelogram. If m<bcd = 113 , then m<dab = ?
*May 28, 2014*

**chemistry**

) A chemist dissolves 1.000 x 103 g of potassium hydroxide in enough water to make 1.5 L of stock solution. The chemist later wants 2.00 x 102 mL of 0.10 M potassium hydroxide. How much stock solution does the chemist need in order to make this second solution?
*May 28, 2014*

**Language Arts (CHECK ANSWERS)**

I believe you are correct :) Anyone else know? lol
*May 28, 2014*

**Physics**

A train 900'm long takes 1minute to cover a bridge of 300 m calculate its average speed
*May 27, 2014*

**trig length**

To secure a 610-meter radio tower against high winds, guy wires are attached to a ring on the tower. The ring is 7 meters from the top. The wires form a 69o angle with the ground. To the nearest hundredth meter find the length of the guy wire
*May 27, 2014*

**English**

There arent any
*May 27, 2014*

**English **

I need help finding quotes about haunting past in the book The Stone Carvers. Please.
*May 27, 2014*

**English**

What food represents bravery? (Someone who is brave)
*May 27, 2014*

**English**

How does Flaubert criticize the institution of family and marriage in Madame Bovary? I need to write an essay and was also wondering if these were good points to talk about. 1. Emma's childhood and the education of girls sets them up for disappointment in marriage because ...
*May 27, 2014*

**physics**

Find the required angular speed, ω, of an ultracentrifuge for the radial acceleration of a point 2.00cm from the axis to equal 6.00×105 g (where g is the acceleration due to gravity).
*May 27, 2014*

**Science**

1.How are continental glaciers different from valley glaciers? C. Continental glaciers flow in all directions as they move, while valley glaciers mice down slopes already cut by rivers 2. How does the process of plucking cause erosion D. Rocks are mixed with sediment and ...
*May 27, 2014*

**physics**

What is the maximum walking speed of an adult man whose legs are each 0.90 m long?
*May 27, 2014*

**general chemistry**

how to calculate molarity?
*May 27, 2014*

**algebra**

given the function rule f(x)=x^2-4x+3, what is the output of f(-3)
*May 27, 2014*

**Math**

These two box and whisker plots show the results of a science test. Plot 1: Minimum:65, Maximum:95, Median:82, 1st Quartile:67, 3rd Quartile:88 Plot 2: Minimum:57, Maximum:100, Median:92, 1st Quartile:78, 3rd Quartile:93 What does this information tell you about the results? A...
*May 26, 2014*

**Math**

There are 30 seniors, 15 juniors, 12 freshman, and 10 sophomores in the club. When one student is picked randomly, what is the probability that a sophomore is not chosen? 57/67?
*May 26, 2014*

**Math**

The probability of rolling a number less than 4 on a number cube is ____ 1/2?
*May 26, 2014*

**world history**

Does anyone know any songs that relate to the period of time from 600 CE to 1450 CE?
*May 26, 2014*

**Chemistry**

Dr bob for this question :Calculate the molar solubility of manganese II hydroxide in ph 12.85 solution. The Ksp is 2.1 x 10^-13 but I can't solve for x thanks.
*May 26, 2014*

**Chemistry**

The Ksp is 2.1 times 10 ^-13 But I don't know how to solve for x the answer is 4.2 times 10^-11
*May 26, 2014*

**Chemistry**

Calculate the molar solubility of manganese II hydroxide in ph 12.85 solution.
*May 26, 2014*

**Algebra**

I mean a group at my gym.
*May 26, 2014*

**Algebra**

So if I interviewed a group of people under 10 and interviewed all people in the group, would that meet the requirements?
*May 26, 2014*

**Algebra**

In this activity, you will design and conduct a survey. Select a topic for your survey. d. Are the people you surveyed representative of the group you want to study? What does D mean?
*May 26, 2014*

**Science 207**

3. How would the “weather” be affected if the water was at a decreased temperature? What about at an increased temperature?
*May 26, 2014*

**trigonometry **

A sled travels from point A at the top of a hill to Point B at the bottom. If the distance from point A to point B is 120 m and the vertical change is 50 m, find the angle of depression to the nearest degree.
*May 26, 2014*

**Ed Tech**

Thanks!
*May 25, 2014*

**Ed Tech**

Is there anything more?
*May 25, 2014*

**Ed Tech**

How does technology impact 21st century skills?
*May 25, 2014*

**algebra**

total cost=2.30+1.2m 1.30m=2.30+1.2m .10m=2.3 m=23 miles check that
*May 25, 2014*

**Ed Tech**

What were the tube computers of 1946-1958 used for?
*May 25, 2014*

**need help1 what function to use? math**

I think it is tan3=30000/l ,l =30000/tan3 theni thnk u can cntinue
*May 25, 2014*

**physics**

An athlete stretches a spring an extra 15.9 cm beyond its initial length. How much energy has he transferred to the spring
*May 25, 2014*

**statistics**

Fill in the blank in the sample below if the variables are independent in the sample like product do not like product old 10 7 young 40
*May 25, 2014*

**7th math**

If the actual figure is a rectangle that is 120 meters by 400 meters, what are the dimensions of a scale drawing in centimeters?
*May 25, 2014*

**Technology**

What are some examples of video effects, such as sepia?
*May 24, 2014*

**Precalculus**

Transform the quadratic equation to a standard form. 4x^2-y^2-24x-10y+11=0 My answer: 4(x-3)^2 - (y+5)^2 = 0 Therefore, this is a degenerate conic section, right?
*May 24, 2014*

**Precalculus **

I know I posted this already but.. I don't understand what exactly is the answer, since the answer key shows the intersection of the circle and hyperbole at (-5,0) What about (7.5,0)???? By the way the graph has one intersection point... How do you know the correct answer...
*May 24, 2014*

**business communication**

I wanted to welcome you asap to our little family here in the states. Its high time we shook hands in person and not just across the sea. Im pleased as punch about getting to know you all,and I for one will do my Level best to sell you on america rewrite in hong kong english
*May 24, 2014*

**Technology**

What are video effects?
*May 24, 2014*

**Algebra 1 **

Simplify the following rational expression: 25 - x^2/x^2 -3x - 10
*May 24, 2014*

**Math**

Marvin was supposed to make three payments of $2000 each—the first one year ago, the second one year from now, and the third three years from now. He missed the first payment and proposes to pay $3000 today and a second amount in two years. If money can earn 4.5% ...
*May 24, 2014*

**Algebra 1**

Answer: 3w+7
*May 24, 2014*

**Algebra 1 **

Simplify the following rational expression: 6w^2 + 11w - 7/6w - 3
*May 24, 2014*

**Precalculus **

Calculate solution set. x^2+4y^2=68 xy=8
*May 24, 2014*

**Precalculus...repost.. The tutor didn't quite answ**

Calculate the solution set. x^2+y^2+8x=-15 9x^2+25y^2=225 My work: I did elimination...multiplied -25 to the top equation and got..... -16x^2-200x-600...I then used quadratic formula ... And got -7.5 and -5..... Is -7.5 an EXTRANEOUS SOLUTION because when I plugged -7.5 in for...
*May 24, 2014*

**Math helpppp**

Answer
*May 24, 2014*

**Math **

An ordinary (fair) die is a cube with the numbers 1 through 6 on the sides (represented by painted spots). Imagine that such a die is rolled twice in succession and that the face values of the two rolls are added together. This sum is recorded as the outcome of a single trial ...
*May 24, 2014*

**math**

if there are 45 pieces of fruit and there are twice as many bananas as there are apples. How many of each kind of fruit are there?
*May 24, 2014*

**Precalculus**

Calculate the solution set. x^2+y^2+8x=-15 9x^2+25y^2=225 My work: I did elimination...multiplied -25 to the top equation and got..... -16x^2-200x-600...I then used quadratic formula ... And got -7.5 and -5..... Is -7.5 an EXTRANEOUS SOLUTION because when I plugged -7.5 in for...
*May 24, 2014*

**Grade 10 English**

i need 3 points of tragedy between the book the Stone carvers and the great gatsby.... i need to write a compasrion essay of tragedy between the two books. please and thank you
*May 24, 2014*

**maaattthhhh**

What are the mean, median, mode, and range of the data set 18, 19, 20, 21, 23, 26, 26, 26? mean = 22.4; median = 22; mode = 26 mean = 22.4; median = 26; mode = 22 mean = 26; median = 22.4; mode = 24 mean = 23.4; median = 22; mode = 26 2. Given the data 21, 13, 13, 37, 13, 23, ...
*May 24, 2014*

**economics**

A New Hampshire resort offers year-round activities: in winter, skiing and other cold-weather activities; and in summer, golf, tennis, and hiking. The resort’s operating costs are essentially the same in winter and summer. Management charges higher nightly rates in the ...
*May 24, 2014*

**physics**

4.95 raise to power 20
*May 24, 2014*

**physics**

two forces of magnitude 8N making an angle of 30 and 120 with +xaxis . FInd the y component of reultant
*May 24, 2014*

**HELP MATH !!**

the 2nd question is a ?
*May 23, 2014*

**Math**

2.45?
*May 23, 2014*

**Math**

20. The time t required to drive a certain distance varies inversely with the speed, r. If it takes 2 hours to drive the distance at 67 miles per hour, how long will it take to drive the same distance at 55 miles per hour? a. about 1.64 hours b. about 134.00 hours c. about 2....
*May 23, 2014*

**Science**

Five groups of rats are fed identical diets except for the amount of vitamin A that they receive. Each group gets a different amount. After three weeks on the diet, the rats are weighed to see if the amount of vitamin A received has affected their weight. Independent Variable...
*May 23, 2014*

**Science**

No duh. I did. How's that supposed to help me? -.-
*May 23, 2014*

**Science**

What about that?
*May 23, 2014*

**Science**

12. Justin usually blows his nose using Kleenex tissues. His snot keeps leaking through the tissue. He decided he's going to create and experiment to find out if there is something better. a. type of tissue b. Justin c. amount of tissue d. mess of the snots the tissue can ...
*May 23, 2014*

**Math**

2. B
*May 23, 2014*

**Science**

5. Justin usually blows his nose using Kleenex tissues. His snot keeps leaking through the tissue. He decided he's going to create and experiment to find out if there is something better. What is 1 constant? a. type of tissue b. Justin c. amount of tissue d. mass of snot ...
*May 23, 2014*

**Science**

How can you measure the angle of incidence and refraction with a protractor? If not, what are some tools I can use which are found at home?
*May 23, 2014*

**2 questions?**

What is the surface area of a sphere with a radius of 4 meters rounded to the nearest square meter? 50 m2 101 m2 201 m2 *** 268 m2 What is the volume of a sphere with a radius of 4 meters rounded to the nearest square meter? 67 m3 201 m3 268 m3
*May 23, 2014*

**Bar Graphs**

Do the bars on bar graphs need to have spacing between them or can they be right next to each other?
*May 23, 2014*

**Algebra**

x(yp) =
*May 23, 2014*

**economics**

what are welfare payments or consumer subsidies
*May 23, 2014*

**Physic**

The position of a mass on a spring is given by x = (7.6 cm) cos [2 π t / (0.82s)]. Where is the mass at t = 3.1 s? (Answer: 1.45cm) Answer is provided above. Please show all work on how to get the answer. Thank you.
*May 23, 2014*

**Math**

In this activity, you will design and conduct a survey. Choose a topic for your survey. 1. Collect your data. 2. Summarize the results with a graph and a description. When they say "Summarize the results with a graph," do they mean that I display the results with a ...
*May 23, 2014*

**math**

A bank wishing to determine the average amount of time a customer must wait to be served took a random sample of 100 customers and found that the mean waiting time was 7.2 minutes. Assuming that the population standard deviation is known to be 15 minutes, find the 90% ...
*May 22, 2014*

**LA**

What are some Disney movies that portray the American dream?
*May 22, 2014*

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