Friday

July 29, 2016
Total # Posts: 92

**Math - system of eqns**

How did you get that though
*June 1, 2016*

**Math - system of eqns **

Consider the system of equations: x1 + x2 + x3 = 6, −x1 − 2x2 + 3x3 = 1, 3x1 − 4x2 + 4x3 = 5. (a) Write down the augmented matrix for this system (b) Use elementary row operations to reduced the augmented matrix to reduced row-ecehelon form FOR A: Ive got: 1 ...
*June 1, 2016*

**Math - Vectors**

Let the points A = (−1, −2, 0), B = (−2, 0, −1), C = (0, −1, −1) be the vertices of a triangle. (a) Write down the vectors u=AB (vector), v=BC(vector) and w=AC(vector) (b) Find a vector n that is orthogonal to both u and v. (c) Find a ...
*May 31, 2016*

**Math**

Ava made 100 paper cranes, and Brittany made34of the number of paper cranes Ava made. Ava gave920of her paper cranes to Brittany. Then, Brittany gave14of her paper cranes to Ava. How many more paper cranes did Brittany have than Ava in the end?
*April 25, 2016*

**math**

five times the number increased by thirteen is less than or equal to twice the nummmber decreased by twenty find the solution
*March 8, 2016*

**Math**

Beth's car has a gas tank that can hold 15 gallons of gas. Her car uses 1/30 of a gallon of gas per mile driven. Darcy's car has a gas tank that can hold 16 gallons of gas. His car uses 1/25 of a gallon of gas per mile driven. Both cars start with full tanks of gas. ...
*October 21, 2015*

**Social Studies**

How does the U.S. Constitutions distribute power through the federal government?
*October 2, 2015*

**trig **

If each leg has length 5 meters, what are the lengths of the other leg and the hypotenuse
*September 10, 2015*

**social studies**

i have to write a 100 word essay per chapter (7 chapters)and i cant copy it out of the book what do i do/
*June 1, 2015*

**Chem**

What is the wavelength (in nm) of an electron with v = 6.0x 105 m/s?
*November 13, 2014*

**Chemistry**

What I dont get is how do i determine the quantum numbers that match up with S's electron configuration
*November 13, 2014*

**MATH**

tobis,marcus,and dominic rode their bicycles to the arcade. tobis rode 12/5 miles, marcus rode 2 1/3 miles and dominic rode 9/4 miles. Which person rode closest to 2 miles?
*September 4, 2014*

**Math: Compass Bearings**

two people start walking from the same point. Person A walks due east for 3.5 km and the person B walks in the direction 123 degrees until they are due south of person A. How far did the second person walk?
*April 23, 2014*

**MAth**

In triangle PQR, <Q=90 degrees, <P=31 degrees and PR=20 cm. Find PQ.
*April 15, 2014*

**Math**

In triangle PQR, <P=90 degrees, <Q=10.5 degrees and RQ=120 cm. Find PR.
*April 15, 2014*

**Biology**

Please Explain thoroughly. A cell exists in a solution of 10% salt and has an internal concentration of 90% salt. Draw this scenario. Label its tonicity. Show where water would flow.
*March 6, 2014*

**math**

Ubuntu
*January 8, 2014*

**Math (Triangles - (Angle of Elevation)**

A television antenna is situated atop a hill. From a point 200 m from the base of the hill, the angle of elevation of the top of the antenna is 80°. The angle of elevation of the antenna from the same point is 75°. How tall is the antenna?
*July 31, 2013*

**Math (Triangles)**

The vertex angle of an isosceles triangle is 40°20'. Each of the leg measures 320 mm. Find the length of the base.
*July 31, 2013*

**Calculus (Limits)**

f(x) is a function differentiable at x=1 and f′(1)=1/13. What is the limit of (x^3 - 1)/f(x) - f(1) as x approaches 1?
*July 21, 2013*

**Differentiation**

If f(x)=(x+1)^2/(2x+1)^3, then f′(1)= −a/b. What is a and b?
*July 21, 2013*

**Math (Algebra)**

What is the maximum value of f(f(x)) in the domain 4≤x≤7 for the function f(x)=x^2−10x+22?
*July 17, 2013*

**Math (Algebra)**

May I know how to compare please? What are the steps? Thanks...
*July 17, 2013*

**Math (Algebra)**

Consider the graph of the quadratic function y=ax^2+bx+c. If it passes through two points P=(6,0) and Q=(14,0), and its vertex is on the line y=−16x, what is the value of a+b+c?
*July 17, 2013*

**Math (Algebra)**

If the function y=(x^2−2x)^2+6x^2−12x has the minimum value b at x=a, what is a−b?
*July 17, 2013*

**SCIENCE**

thank you
*July 10, 2013*

**SCIENCE**

why is a hydrogen molecule (H2) more stable than two individual hydrogen atoms?
*July 10, 2013*

**SCIENCE**

why is a hydrogen molecule (H2) more stable than two individual hydrogen atoms?
*July 10, 2013*

**Math (Geometry)**

In triangle ABC, ∠A=20∘ and ∠B=80∘. Let D be a point on line segment AB such that AD=BC. What is the measure (in degrees) of ∠ADC?
*July 7, 2013*

**Trigonometry**

Let z be a complex number such that z=2(cos8∘+icos82∘). Then z^5 can be expressed as r(sinα∘+icosα∘), where r is a real number and 0≤α≤90. What is the value of r+α?
*June 30, 2013*

**Math **

There are two points A=(2,0) and B=(4,0) and a moving point P=(t,t) on the xy-plane. If the minimum value of line AP+ line BP is b, what is the value of b^2?
*June 28, 2013*

**Math (Algebra)**

Find the largest integer N for which N−6 evenly divides N^3−6.
*June 28, 2013*

**Math (Quadratics)**

If the quadratic equation for x {1+(a+b)^2}x^2−2(2a+2b+1)x+5=0 has real roots, what is the value of a^3+b^3+6ab+a+b?
*June 26, 2013*

**Math (Quadratics)(Discriminants)**

If a is a real number and a cubic equation f(x)=x^3−8x^2+(a+12)x−2a has a repeated root, what is the sum of all the possible values of a?
*June 26, 2013*

**Algebra**

Use synthetic division and the Remainder Theorem to find P(-5) if P(x) = -x^3 - 4x^2 + x - 2. Please help....?
*March 5, 2013*

**Physics**

(car lift on lift) -------------- ____---____ <- lift .........| | .........| | .........\ \__________________ ..........__________O_______....\ ....................................[....|....|.....] ................. ________________ ------------------^^^^^^^^^^^^^^^^ fluid...
*December 5, 2012*

**Physics**

Pic should be fixed below: (car lift on lift) -------------- ____---____ <- lift ...|...| ...|...| ...\...\__________________ ....__________O_______.....\ ..................[....|....|.....] ................. ________________ ------------------^^^^^^^^^^^^^^^^ fluid ...
*December 5, 2012*

**Physics**

Figure 18-46 shows a hydraulic lift operated by pumping fluid into the hydraulic system. The large cylinder is 40 cm in diameter, while the small tube leaving the pump is 1.7 cm in diameter. A total load of 2500 kg is raised 2.2 m at a constant rate. Neglect pressure ...
*December 5, 2012*

**Physics**

Hmm didn't keep the spaces darn ;\, basically the tank was on the left, 1 cm pipe stretches for a bit out of the bottom right of the tank, midway through that ascending is a similar diameter vacuum tube for part b, and then to the right of the 1 cm pipe, it basically turns...
*December 4, 2012*

**Physics**

A 0.8 m diameter tank is filled with water to a depth of 2.2 m and is open to the atmosphere at the top. The water drains through a 1.0 cm diameter pipe at the bottom; that pipe then joins a 1.5 cm diameter pipe open to the atmosphere, as shown in Fig. 18-53. |0.8 m...
*December 4, 2012*

**sci**

What is the power of a 300 n force applied over 20 m fro 20 sec? What is the horsepower?
*November 16, 2012*

**sci**

What is the power of a 300 n force applied over 20 m fro 20 sec? What is the horsepower?
*November 16, 2012*

**Physical science**

What is the gravitational potential energy of a 5kg object resting 3m above the ground?
*October 21, 2012*

**Chemistry**

Help writing complete ionic and net ionic equations.? Hg2(NO3)2 (aq) + CuSO4 ---> Cu(NO3)2 (aq) + Hg2SO4 (s) K2CO3 (aq) + MgI2 --> MgCO3 (s) + 2KI 3 NaCrO4 (aq) +2 AlBr3 ---> Al2(CrO4)3 (s) + 6NaBr i got down writing the formula equation but i would like help with the...
*October 16, 2012*

**Math Please Help ME :(**

help me plz
*September 18, 2012*

**Math Please Help ME :(**

14. 10 5/18 – 8 5/6 = 15. 1/2 • –1 1/3 = 16. 5/8 ÷ 15/16 = 17. Write 13/4 as a decimal. Round to three decimal places
*September 18, 2012*

**math**

please help me
*September 18, 2012*

**math**

14. 10 5/18 – 8 5/6 = 15. 1/2 • –1 1/3 = 16. 5/8 ÷ 15/16 = 17. Write 13/4 as a decimal. Round to three decimal places
*September 18, 2012*

**plz help ms sue**

i am still confused
*September 13, 2012*

**plz help ms sue**

i am not chase
*September 13, 2012*

**plz help ms sue**

1. What is the product of (5.1 x 10^3) x (3.2 x 10^3)? a. 16.32 x 10^6 b. 1.632 x 10^7 c. 16.32 x 10^9 d. 1.632 x 101^0 2. What is the product of (7.28 x 10^-2) x (9.1 x 10^-2)? a. 6.6248 x 10^-3 b. 66.248 x 10^-4 c. 6.6248 x 10^4 d. 66.248 x 10^-3 3. What is the quotient of (...
*September 13, 2012*

**math**

help me plz
*September 13, 2012*

**math**

1. What is the product of (5.1 x 10^3) x (3.2 x 10^3)? a. 16.32 x 10^6 b. 1.632 x 10^7 c. 16.32 x 10^9 d. 1.632 x 101^0 2. What is the product of (7.28 x 10^-2) x (9.1 x 10^-2)? a. 6.6248 x 10^-3 b. 66.248 x 10^-4 c. 6.6248 x 10^4 d. 66.248 x 10^-3 3. What is the quotient of (...
*September 13, 2012*

**Math**

no problem
*September 13, 2012*

**Math**

cloudy and sunshine east and west wet and dry
*September 13, 2012*

**Chemistry**

Ag+2 is generated in a lab. This is an unusual oxidation state for AG. Write the ground state electronic configuration of Ag+2 using the noble gas shortcut.
*February 23, 2012*

**Chemistry**

Calculate mass of iron in tablet by spectroscopy? I have to calculate the mass of iron in a tablet..The manufacturers claim it contains 60 mg elemental iron. background info: The tablet was crushed and dissolved in 25ml of 6M Hcl, filtered and added to a 100ml volumetric flask...
*February 14, 2012*

**math**

Sara bought a tomato plant for her garden. initially it is 5 centimetres tall, and it grows at a rate of 3 centimetres per week Write an equation
*January 21, 2012*

**7th grade math**

suppose you used the rule (3x+1,3y-4) to transform the original figure into a new figure. Would the new figure be similar to the original? Explain. I NEED HELP ASAP PLEASE!!! HELP. Thanks.
*January 16, 2012*

**math**

bob bender needs to buy fertilizer and fencing for his vegetable garden.his square garden measures 10 feet on each side.the directions say that each bag of fertilizer will cover 50 square feet of soil.how many bags of fertilizer will he need to buy?How many feet of fencing ...
*January 16, 2012*

**Math**

MAT Around Town
*November 17, 2011*

**Math**

We have this thing called MAT and we have to do a survey this week. What's your favorite type of music? Pop Hip hop Rap Rock Depressing Songs Heavy Metal
*November 17, 2011*

**Phsics**

A man weighs 772 N on Earth. What would he weigh on Jupiter, where the free-fall acceleration is 25.9 m/s2? The acceleration of gravity is 9.8 m/s2 . Answer in units of N
*November 7, 2011*

**4th grade math**

I need help
*September 28, 2011*

**Math**

What is the supplement, and compliment of 6x-5. Thanks in advance.
*August 29, 2011*

**chemistry**

whoops, i did the math and it came out to about 34,400 years. Sorry for my earlier answer
*April 25, 2011*

**chemistry**

Without even doing the math it the change in disintegrations is merely .03333, the sample must have decayed for d. less than a few years
*April 25, 2011*

**math**

One day a third of the class is absent and 16 children are present. How many children are in the class when no one is away?
*February 22, 2011*

**Peartree Elementary**

There are 50 oranges in a box 3/10 of them are rotten. How many of the oranges are not rotten?
*February 6, 2011*

**physic**

A bobsled slides down an ice track starting (at zero initial speed) from the top of a(n) 146 m high hill. The acceleration of gravity is 9.8 m/s2 . Neglect friction and air resistance and de- termine the bobsled’s speed at the bottom of the hill. Answer in units of m/s.
*January 11, 2011*

**Math**

Find all the vectors that are perpendicular to (1,4,4,1) and (2,9,8,2).
*December 8, 2010*

**physics**

A rock tied to a string is swung around in a circle with a radius of 10 ft. The centripetal acceleration is 16.9 ft/sec2. Calculate the speed of the rock.
*November 23, 2010*

**12th grade PYSICS**

A rock tied to a string is swung around in a circle with a radius of 10 ft. The centripetal acceleration is 16.9 ft/sec2. Calculate the speed of the rock.
*November 7, 2010*

**physics**

which one is the answer..? #trustissues
*October 19, 2010*

**computer science**

What is the binary representation of the following hexadecimal number? What are the decimal numbers they represent when interpreted as undesigned integers. (a) F4 (b) 9F
*October 17, 2010*

**Calculus**

Why would it only be the integral of x^2 and not the integral of 1-x^2 from x=-1 to x=1? So wouldn't that equal an area of 4/3? And secondly, how would you sketch these solids? when you say integrate along the y-axis do you mean to say that the curves have to be shifted as...
*February 2, 2010*

**Calculus**

R is the region in the plane bounded below by the curve y=x^2 and above by the line y=1. (a) Set up and evaluate an integral that gives the area of R. (b) A solid has base R and the cross-sections of the solid perpendicular to the y-axis are squares. Find the volume of the ...
*February 2, 2010*

**Trigonometry**

Two men on the same side of a tall building notice the angle of elevation to the top of the building to be 30 dgrees and 60 dgrees respectively. If the height of the building is known to be h equals 60 m, find the distance (in meters)btween the 2 men.
*January 24, 2010*

**Trigonometry**

A crow is on the ground 80 feet from the base of a 45 foot tall tree. It then flies straight throught the air to the top of the tree. What is the angle of the crow's flight path relative to the ground ?
*January 24, 2010*

**Math**

What times on a clock form an acute angle.. 2:00 6:40 1:30 12:50?
*November 4, 2009*

**math**

Can you check if my answer is correct? thanks... Find the equation of the line that passes through the points (-2,1) and (1, -5). m = y2 -y1/x2-x1 = 5-1/ 1-(-2) = 4/1+2 = 4/3
*October 26, 2009*

**Math **

Build a 9-digit numeral write 2 in the hundreds place 5 in the ten thousands place 7 in the millions place 6 in the hundred millions place and 3 in all other places
*October 19, 2009*

**Intermediate Accounting I**

On January 1, 2007, the Accumulated Depreciation-Machinery account of a particular company showed a balance of $370,000. At the end of 2007, after the adjusting entries were posted, it showed a balance of $395,000. During 2007, one of the machines which cost $125,000 was sold ...
*April 25, 2009*

**Micro Economics**

Resources are being used efficiently when 1. scarcity is not longer an issue 2. they are also used equitably 3. every opportunity to make people better off has been utilized 4. there are still gains from trade available
*February 15, 2009*

**International Business**

I have answer all question but i'm quiet understanding of centralization and decentralization. Here is the website that i chose Barry Callebaut -barry-callebaut After reading the profile i think the company is part of both but don't understand which side they lean more...
*September 25, 2008*

**International Business**

How does one go about selecting a country because i'm clueless when it come to anything about business/political international in order to answer these question I was thinking Africa but not sure if that's a good country? Select a company and country that interests you...
*August 28, 2008*

**project Manangement**

Think of a recently completed group project that you have been involved in. This project may have been a student project, a group project, or an extracurricular project. Briefly describe the situation and choose one of the following to post on the discussion board: i always ...
*August 17, 2008*

**project management**

reasons why scheduling is an important task
*August 7, 2008*

**unscramle**

hancips
*April 9, 2008*

**math unscramble **

enitmelgens
*September 5, 2007*

**algebra1**

-30n=-27n-63
*August 30, 2007*

**unscrambling word**

hancips
*June 14, 2005*

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