Friday

August 28, 2015
Total # Posts: 83,597

**Math **

Simplify by writing each fraction in lowest terms: X^2-y^2/(x-y)^2 My work: X^2-y^2/(x-y)^2 =X^2-y^2/(x-y)(x-y) =X^2-y^2/x^2-2x2y-y^2 I don't know what to do next.
*August 28, 2015*

**English**

I have to write a thematic essay and a characteristic essay. I have a few questions in the writing. I am in grade 11 right now. 1) what should I include in the introduction? Whenever I write anything about the story, my tutor says that is summarizing and I should not do that ...
*August 28, 2015*

**Math**

X^-5 * X^7 = X^2 And the reason is because when u are multiplying with the same base, you add the exponents
*August 28, 2015*

**government**

How much power and autonomy should Texas have in relation to the federal government? Why?
*August 28, 2015*

**Algebra 2**

You need to earn $539 per week to afford the new car you want to purchase. Your work week is 46 hours. You get 1.5 times the regular hourly rate for overtime (anything over 40 hours). How much does your hourly rate need to be? (use step 1-4).
*August 27, 2015*

**Geometry **

Point J is between H and K on line HK. Use the given information to write an equation in terms of x. Solve the equation. Then find HJ and JK HJ=5x-3 JK=x-9 KH=5x
*August 27, 2015*

**Algebra**

(1,12) (2,76) (3,108) (4,124) (5,132) (6,136) (7,138) (8,139) (9,139.5) What is the rule or equation?
*August 27, 2015*

**math**

the garden has fencing around the perimeter and has a partition down the center. The length of the garden is 30 ft and the entire length of fencing used is 37 yards. How long is the partition in feet?
*August 27, 2015*

**geography need help please**

I need to pass my finals tomorrow! pleas help me! its geometry? Does anyone know how to do any of these problems ? please help! 1- 3, 5, 7, 9... Generalize the pattern by finding the nth term. A) 3n B) 2n + 1 C) n + 2 D) (n + 1)(n + 2) 2- If the radius of a cylinder is doubled...
*August 27, 2015*

**Algebra **

Written in simplest form, 3x^3-27xy^2 / 12x^2+36xy is: (1) x+3y/4 (2) x+4y/3 (3) x-3y/4 (4) x-3y/4(x+3y) My work: 3x^327xy^2/12x^2+36xy=3x(x^2-9y^2/3x(4x+12y)=x^2-9y^2/4(x+3y)
*August 27, 2015*

**equation on tangent of a curve need help**

Ok tankz for the clue u have given me am grateful
*August 27, 2015*

**science**

2.55 molecules
*August 27, 2015*

**math**

If (2 1/2)^4y =1/8 then y = A. -4 B. -1/8 C. 7/8 D. 3/2 E. 21/16
*August 27, 2015*

**physics**

a ball is thrown horizontally from the top of a building 35m. high. the ball strikes the ground at a point 80m from the base of the building. a. find the time the ball is in flight b. its initial velocity c. the x and y components of velocity just before it hits the ground
*August 27, 2015*

**Algebra 2**

the sum of the angles in a triangle is 180 degrees. if A:B:C = 2:3:3, what is C-A?
*August 26, 2015*

**Algebra **

Need help to an math problem. James have 15 cases, with 15 boxes per case, and 15 brands per box. Write an exponential expression using a base of 15 to show how many total brands there are in a stack of cases. How would I write that?
*August 26, 2015*

**PLEASE HELP GEOMETRY**

A. a protractor is used to take measurements B. four right angles are created C. a compass is used to copy an angle **** D. there are no similarities
*August 26, 2015*

**PLEASE HELP GEOMETRY**

When constructing inscribed polygons and parallel lines, how are the steps similar? a protractor is used to take measurements four right angles are created a compass is used to copy an angle **** there are no similarities I think its c, but it might be b. PLEASE HELP <3
*August 26, 2015*

**HELPPPP! ELECTRONICS**

When an electron is displaced in a semiconductor, the hole that's left behind is A. incapable of carrying a charge. B. considered an impurity in the crystal. C. attracted to the anode of the voltage source. D. attracted to the negative terminal of the voltage source.
*August 26, 2015*

**Calculus**

True or false. 1. If f(x) has a vertical asymptote at x=a, then the limit of f(x) as x --> a from the left is negative infinite and the limit of f(x) as x--> a from the right is positive infinite. I think this is true. Take for instance, a rational function. the two ...
*August 26, 2015*

**Math**

Write an algebraic equation to solve for the pencil cost (x). 5(0.3)+30x= 10(0.3) + 24x 1.50 +30x=3+24x 1.50+6x=3 6x=1.5 x=1.5/6=0.25 The cost of the pencil is $0.25.
*August 26, 2015*

**math**

Let a=6 and b=2. a^b=36 ------> 6^2=36 b^a-2 ---> 2^6-2 = 2^4=16
*August 26, 2015*

**Math**

a rectangular piece of cardboard is twice as long as it is wide . from each of its for corners, a square piece 3 inches on a side cut out. the flaps at each corner are then turned up to form an open box. if the volume of the box is 168 cubic inches, what were the original ...
*August 26, 2015*

**mathematics**

Use the quadratic formula to find the exact roots of 2x² = 5x + 2
*August 26, 2015*

**chmistry**

For the following equation, how many grams of NO2 can be formed from 2.50 g of CuO mixed with 0.500 L of NO gas at 25 C and 1.12 atm. ? 2 CuO (s) + NO (g) Cu2O (s) + NO2 (g
*August 26, 2015*

**language arts**

2. In which of the following sentences does the boldfaced word contain the Latin root -lum-? A.The bear tucked into his cave for a long winter's (slumber). B.Hannah's face was (luminous) with the soft morning light. *** C.The (plumber) peered into the dark drainpipe. ...
*August 26, 2015*

**sound**

In a stringed musical instrument, the sound frequency of a particular string can be increased by A. lengthening the string. B. tightening the string. C. increasing the string's thickness. D. loosening the string.
*August 26, 2015*

**Piper**

4^2-((5(2+1) )
*August 25, 2015*

**English**

The match yesterday was won by ..
*August 25, 2015*

**math**

e is true
*August 25, 2015*

**math **

if the equation |x - a| = |y - a| is true, then which of the following must be true? a. |x| = |y| b. x>a c. |x + y| ‚ 0 d. y<a e. | -a+y | = | -a+x |
*August 25, 2015*

**Math**

During a parade,band members marched in 18 rows.There were 9 band members in each row .The band members marched for 2 miles. How many band members were there?
*August 25, 2015*

**smiley**

What number can you subtract from 3,200 so that their differences is a 4 digit number with the digits in the thousands place, The digits in the hundreds place and zero in the tens and ones place
*August 25, 2015*

**Math**

Use the commutative and distributive properties of multiplication to write an equivalent expression to 2(x−3).
*August 25, 2015*

**Biology -- metric **

Which statement best describes the significance of the number 10 in the metric system? The system is used by 10 countries There are 10 metric prefixes There are 10 base units The system is based on multiples of 10. * my answer How many places would the decimal move in a ...
*August 25, 2015*

**Science**

A scientist is testing the effects of fertilizer on peanut production. He plants 4 peanut plants and applies a different amount of fertilizer to each plant. Two of the plants die. Can he conclude that the amounts of fertilizer used on those plants were lethal? What other ...
*August 25, 2015*

**Manometer**

A manometer is used to measure the pressure of a gas in a container one side is connected to the container the other side is open to the atmosphere. A manometer contains water of density 1000kg/m^3 and the head is 250mm. Calculate the gauge pressure of the gas in a container.
*August 25, 2015*

**math**

Susan has 8/9 gallons of water. She drinks 2/5 of it. Select all the statements that help you determine what fraction of a gallon she has left. Divide 8/9 by 2/5. No Divide 2/5 by 8/9. Yes Multiply the fractions together. No Multiply 8 x 2 and 9 x 5. No Can someone check my ...
*August 25, 2015*

**geography**

THANK YOU! I know your right, kind of stress out and short cuts are looking really good BUT YOU ARE THE BEST FOR CONFIRMING!
*August 25, 2015*

**geography**

I have searched everywhere, plzzzz help!!! i dont get it!
*August 25, 2015*

**geography**

Which of the following countries has the highest number of Fortune 100 companies? A. United States B. Germany C. Japan D. France im leaning more on a
*August 25, 2015*

**Tech**

What types of issues can you likely resolve by knowing how to access and use the control panel. Choose all that apply. Network Issues*** Screen resolution and volume issues frozen application issues virus issues***
*August 25, 2015*

**Science**

thank you
*August 25, 2015*

**Science**

A chemist notes that a solution turns blue when a chemical reaction takes place. Which of the following correctly describes the chemist's data? A.The data is a qualitative observation*** B.The data is a quantitative observation C.The data is a prediction D.The data is a ...
*August 25, 2015*

**Science**

Thanks
*August 25, 2015*

**Science**

A biologist determines that a lizard's body temperature is 29 degrees C. Which of the following correctly describes the biologist's data? a) it is a qualitative observation b) it is a quantitative observation*** c) it is a prediction d) it is a classification
*August 25, 2015*

**Science **

You walk into the kitchen and see a broken egg on the floor. Which of the following is an inference you can make based on this observation? a) The egg rolled off the kitchen counter*** b) the dog will eat the egg off the floor c) there are pieces of broken eggshell on the ...
*August 25, 2015*

**math**

Thanks man
*August 25, 2015*

**math**

-12 ÷ 3 x ( -8 + (-4)^2 - 6 ) + 2 how do you simplfy this expression?
*August 25, 2015*

**Maths**

The sum of the 8 terms of a GP is 5 times the sum of first 4 terms. Find the common ratio.
*August 25, 2015*

**Math**

The sum of the length, width, and height of a box is 80 cm. The length is 10 cm less than twice the sum of the width and the height, and twice the width exceeds the height by 6 cm. Find the height of the box.
*August 25, 2015*

**Physics**

When the shuttle bus comes to a sudden stop to avoid hitting a dog, it decelerates uniformly at 3.6 m/s^2 as it slows from 8.5 m/s to 0 m/s. Find the time interval of acceleration for the bus. Answer in units of s.
*August 25, 2015*

**Physics**

A car travels in a straight line for 2.9 h at a constant speed of 77 km/h . What is its acceleration? Answer in units of m/s^2
*August 25, 2015*

**English (3rd grade)**

How to analogies eighteen even thirty three
*August 25, 2015*

**Math**

explain how you know that in ? x 6.273 = 6.273. THe ? will be 1.
*August 24, 2015*

**Math**

Nancy collects plastic banks. He has three different banks a pig a cow and a horse. How many ways can Yancey arrange his banks on a shelf?
*August 24, 2015*

**geometry**

A globe has a diameter of 24 inches. A smaller globe has a diameter of 18 inches. What is the surface area volume ratio of the smaller globe
*August 24, 2015*

**English**

We were pleasantly surprised to see that she completed the difficult task we had given her with neatness and (irk, dispatch)
*August 24, 2015*

**geometry**

A family is getting a doghouse for their dog. The doghouse is proportional to their own house, which is 115 feet long and 65 feet wide. The scale is 0.04. What is the length of the doghouse?
*August 24, 2015*

**Milton mpfumedzeni life orientation grade 11 **

To wich bad road use has a direct impact on the physica,l social and economic aspects to the family the community and the country
*August 24, 2015*

**life science**

Two breaking tubes,two drnking staws,clear lime water
*August 24, 2015*

**Word problems**

hmmm. yeah. I wonder how I (a) got that answer, and (b) didn't immediately notice that it made no sense. Anyway, Rachel, you can see how to fix it and get the right answer. Unlike me, check it for consistency!
*August 23, 2015*

**Math **

F(x) = x^2 +1 , x cannot equal 2 F(x)= 3 , x=2 What is the limit of f(x) as it approaches 2?
*August 23, 2015*

**Calculus **

If 2 < or = to f(x) < or = to x^2 + 2 for all x, find the limit of f(x) as it approaches zero.
*August 23, 2015*

**Calculus **

F(x)=(2x-1)/ (|x| -3) Rewrite f(x) as a piecewise function. Then find the limit as it approaches positive infinity and negative infinity.
*August 23, 2015*

**Math **

If a population grows at 8% per year, how long will it take the population to double?
*August 23, 2015*

**Math **

If the current population is 7,361,920,000 and grows at approximately 1.14% per year, what will the human population be this time next year?
*August 23, 2015*

**Math **

If the current population is 7,361,920,000 and grows at approximately 1.14% per year, what will the human population be this time next year?
*August 23, 2015*

**Math **

If a city of 10,000 experiences 60 births, 35 deaths, 40 immigrants and 25 emigrants in a single year, what is the city's population growth rate?
*August 23, 2015*

**Computer science**

77c
*August 23, 2015*

**Introd to Stat**

A researcher conducts a test on the effectiveness of a cholesterol treatment on 114 total subjects. Assuming the tails of distributions are normal distribution, is there evidence that the treatment is effective? Cholesterol Decreased No Cholesterol Decrease Total Treatment 38 ...
*August 23, 2015*

**Calculus **

If 2 < or = to f(x) < or = to x^2 + 2 for all x, find the limit of f(x) as it approaches zero.
*August 23, 2015*

**Calculus**

If 2 < or = to f(x) < or = to x^2 + 2 for all x, find the limit of f(x) as it approaches zero.
*August 23, 2015*

**Calculus **

F(x)=(2x-1)/ (|x| -3) Rewrite f(x) as a piecewise function. Then find the limit as it approaches positive infinity and negative infinity.
*August 23, 2015*

**calc**

A car travels along a straight road for 30 seconds starting at time t = 0. Its acceleration in ft/sec2 is given by the linear graph below for the time interval [0, 30]. At t = 0, the velocity of the car is 0 and its position is 10. What is the velocity of the car when t = 6? ...
*August 23, 2015*

**life orientation**

To which bad road use has a direct impacton the physical, emotional, social and economic, Aspects to the family, the community and the country.
*August 23, 2015*

**calculus: don't even no where to start from need help plz**

2X+4x =6x
*August 23, 2015*

**Calculus **

Find the limit as it approaches zero. ( f( x + change in x) - f(x) )/ change in x given f(x)=2x-5. ( change in x = triangle x)
*August 23, 2015*

**Calculus **

Graph the function f(x)= x sin( 1/x) and the equations y=|x| and y=-|x| in the same viewing window on your calculator. Then use the squeeze therom to find the limit of f(x) as it approaches zero. I graphed the function and equations, but I am confused on how to find the limit ...
*August 23, 2015*

**Math**

Sorry it was: √2x/9.81= √(300+x)^2+60^2/150
*August 22, 2015*

**Math**

Find x √2x/9.81= √(300+h)^2+60^2/150 Thankyou!
*August 22, 2015*

**Physics**

A clown at a birthday party has brought along a helium cylinder, with which he intends to fill balloons. When full, each balloon contains 0.00280 m3 of helium at an absolute pressure of 1.20 x 105 Pa. The cylinder contains helium at an absolute pressure of 2.90 x 107 Pa and ...
*August 22, 2015*

**math**

156.1 is 70% of what number?
*August 22, 2015*

**calc**

The velocity of a particle moving along the x-axis is v(t) = t2 – 2t, with t measured in minutes and v(t) measured in feet per minute. To the nearest foot find the total distance travelled by the particle from t = 0 to t = 3 minutes..
*August 22, 2015*

**Physics**

In a house the temperature at the surface of a window is 22.3 °C. The temperature outside at the window surface is 2.82 °C. Heat is lost through the window via conduction, and the heat lost per second has a certain value. The temperature outside begins to fall, while ...
*August 22, 2015*

**physics**

two small kids weighing 10kg and 15kg are trying to balance on a seesaw of total length 5 m with the fulcrum at the centre. if one of the kids is sitting at an end where should the other sit?
*August 22, 2015*

**Math**

nope, try c.
*August 21, 2015*

**Physics**

energy is proportional to temp to the forth power. fourth root of 81 3^4=81
*August 21, 2015*

**Physics**

The Kelvin temperature of an object is T1 and the object radiates a certain amount of energy per second. The Kelvin temperature of the object is then increased to T2, and the object radiates 81 times as much energy per second as it radiated at the lower temperature. What is ...
*August 21, 2015*

**Math**

50% Rule: The repackaged vial or unit dose must have an expiration date placed on it; but it is not the same expiration date as what is on the stock bottle. You must take the date on the stock bottle and write the half way date between today’s date and the expiration date...
*August 21, 2015*

**Math**

Sammy has fifty coins in his pocket that add up to one dollar. how many coins of each denomination are in sammy's pocket?
*August 21, 2015*

**Geography**

1. Piedmont and Blue ridge 2. Costalplain and Piedmont
*August 21, 2015*

**Geography**

the fall line divides which two physiographic regions
*August 21, 2015*

**Physics**

A man can swim in still water at a speed of 3km/hr.He wants to cross the river that flows at 2km/hr and reach the point directly opposite to his starting Point.find the angle if his body makes with the river flow.
*August 21, 2015*

**Geography**

Thanks
*August 21, 2015*

**Geography**

in 3-5 sentences, provide brief description of the Okefenokee Swamp, its creation as a national wildlife refuge, and its importance for biological diversity in the state.
*August 21, 2015*

**Integration**

think of it as (x-)^(-1/2) looks like (2x-1)^(1/2) + c or sqrt(2x-1) + c to me
*August 21, 2015*

**Math- Need Help**

You apparently multiplied the first equation by 3 and the 2nd by 4. Your first should have been 15x + 12y = 15 and then 16x + 12y = 20 subtract them x = 5 back into the first: 5x+4y=5 25+4y=5 4y = -20 y = -5 your line of 31x/31= 38/31 makes no sense. Looks like you added the ...
*August 21, 2015*