Thursday

August 25, 2016
Total # Posts: 360

**math**

Write the given expression as the tangent of an angle. tan 7x − tan x/ 1 + tan 7x tan x
*July 11, 2016*

**math**

Write the given expression as the cosine of an angle. cos 60° cos 65° − sin 60° sin 65°
*July 11, 2016*

**life orientation**

clearly describe a recent corruption and fraud case in the country making headlines in the media:who the players are who got involved,the extent to which it linked to other crimes,role played by the media and that of the state to deal with this crime
*May 2, 2016*

**Stats**

The GRE has a combined verbal and quantitative mean of 1000 and standard deviation of 200. Scores range from 200 to 1600. a. what % of the persons score above 1300? b. above 800? c. below 1200? d. above what score do the top 20% of the test-takers score? e. Below what score do...
*April 17, 2016*

**math**

1) A rectangular tank, 15 cm long and 20 cm wide, is filled with water to a depth of 12 cm. When a rock is put in, the water level rose to 15 cm. What is the volume of the rock?
*March 23, 2016*

**Chemistry**

Use the Table of Thermodynamic Data to decide which of the following reactions have K>1 at 298 K: (i) HCl(g) + NH3(g)-->NH4Cl(s) (ii) 2 Al2O3(s) + 3 Si(s)-->3 SiO2(s) + 4 Al(s) (iii) Fe(s) + H2S(g)-->FeS(s) + H2(g). Which of the products of these reactions are ...
*March 23, 2016*

**English**

The cow jumped over the moon what is the subject, verb and object in this sentence.
*March 19, 2016*

**Physics**

Thank for the explanation, I knew about momentum but the fact that kinetic energy was mentioned in the question just threw me off.
*March 5, 2016*

**Physics**

Does the total kinetic energy of an isolated system necessarily have to be conserved when its total momentum is conserved?
*March 5, 2016*

**college pre-calc**

Would a truck that is 12 feet tall and 9 feet wide fit through a parabolic arch that is 15 feet high at the high point and 16 feet wide?
*January 31, 2016*

**Physics**

Thanks! so the 100m/min is right?
*January 31, 2016*

**Physics**

Consider a circular track with a radius of 200 meters. A runner starts on the east side and runs around the track to a point diametrically opposite her starting point. -What is the magnitude of her displacement? 400m -She then runs the rest of the way around the track to ...
*January 31, 2016*

**Words**

word has the same root as diagram? a. agree b. diameter c. grade d. ramp
*January 7, 2016*

**Algebra 2**

Find the x and y intercepts for the following parabolas. y=(x+12)^2-144 y=(x-8)^2-4
*December 15, 2015*

**math**

Compute the hurdle rate above based on the following.1. Note payable bank $2,000,000.00 with rate of 7.5%, The company has a tax rate of 30%.2. Bank Mortgage Loan $1,000,000.00 with rate of 6% The company has a tax rate of 30%.3. Preferred stock $750,000.00 with coupon rate 10...
*November 19, 2015*

**math**

How much of 20% alcohol solution and 50% alcohol solution must be mixted to get 9 liters of 30% alcohol solution?
*November 9, 2015*

**Geometry**

The area of a triangle is 30cm^2. What is the base of the triangle if the height is 6 cm?
*October 13, 2015*

**Chemistry**

okay thank you very much!
*October 13, 2015*

**Chemistry**

So far I have calculated for the moles of ch4 and o2, by the ideal gas law. I then used the molar ratio to find the moles of product from each individual reactant. I determined that the limiting reactant is CH4 (don't know if that's correct). From there would I just ...
*October 13, 2015*

**Chemistry**

The apparatus contains methane and oxygen at a temp of 383K. Here is the reaction: CH4(g) + 2O2(g) --> CO2(g) + 2H2O(g) solve for final pressures of all species and the final total pressure, For CH4 the volume = 1.164L the pressure = 6atm For O2 the volume = 0.827L the ...
*October 13, 2015*

**Chemistry (Le Chatelier's Principal)**

Methanol has the formula CH3OH and can be produced by the reaction of carbon monoxide with hydrogen gas. CO + 2 H2 ￼<-->￼ ￼CH3OH + heat In an attempt to maximize the yield of methanol (amount of methanol produced), a chemist would try to shift the ...
*October 4, 2015*

**Computer**

whats the best topic for a slide show presentation that could capture so much attention of the teens ?? i just cant think of any topic ... thanks for your help in advance :)
*September 16, 2015*

**Psychology**

what is the unconditioned stimulus (US), unconditioned response (UR), condition stimulus and conditioned response of this example??? 1.)Art goes to a meeting in New Orleans and tries some oysters at the oysters bar. He likes the taste and eats quite few. Soon he becomes very ...
*September 15, 2015*

**Math**

A man hires a car with the fuel tank 5/8 full. He travels 180 miles and is left with 2/8 of a tank. How much fuel will he need to put in the car at the start of his return journey of 200 miles to ensure he has 5/8 of a tank when he gets back with no wasted cost?
*September 10, 2015*

**math**

thank you Ms. Sue. I just couldn't really understand the question before, but now I see.
*August 18, 2015*

**math**

at the rate of 50 mph a car can travel 14.6 miles for each gallon of gas used. On a trip Mr. Hanson used 12.5 gallons of gas traveling at a speed of 50 mph. the number of miles covered during the trip was:
*August 18, 2015*

**math**

you invested $8000 between two accounts paying 7% and 9% annual interest, respectively. If the total interest earned for the year was $600 how much was invested at each rate?
*July 5, 2015*

**accounting 100**

000
*May 7, 2015*

**accounting 100**

The following items are taken from the financial statements of the Postal Service for the year ending December 31, 2014: Accounts payable $ 18,000 Accounts receivable 11,000 Accumulated depreciation – equipment 28,000 Advertising expense 21,000 Cash 15,000 Owner’s ...
*May 7, 2015*

**Physics**

A yo-yo is spun from rest by pulling on the string with a constant tension of 2.0 N. The radius of the inner rod on which the string is strung around is 0.50 cm. The tension is applied for 5.0 seconds after which the yo-yo is observed to spin with an angular velocity of 15 rad...
*April 22, 2015*

**Calculus **

A rectangular page is to have a print area of 96 square inches. The top and bottom margins are to be 1.5 inches each and the left and right margins are to be 1 inch each. What dimensions will minimize the total area of the page. I got L=8sqr(2) But I'm not sure how to get...
*April 13, 2015*

**Math**

I have a line plot ranging from 0-15. The numbers represent the "number of books read by students." There are no students in 0-1-11-14 or 15. What would the median number of books read by students be? My "incorrect" answer was 7.5! Please help and expain. ...
*March 23, 2015*

**critique reasoning**

Alex decides that 21 divided by 3=7 is NOT a true equation. Is Alex correct? Explain
*March 4, 2015*

**math**

Critique Reasoning Alex decides that 21 divided by 3 = 7 is NOT a true equation. Is Alex correct? Explain
*March 4, 2015*

**physics**

If micheal Jordan has a vertical leap of 1.29 m, what is his take off speed and his hang time(total time to move upwards to the peak and then return to the ground)?
*February 25, 2015*

**maths**

How do I plot three points on a graph if the first coordinate is equal to (-2.8) and the other two coordinates are unknown?
*February 25, 2015*

**Math**

Solve for y: x = (x+1)(x+y)
*January 7, 2015*

**Algebra**

What are the complements and supplements of: (y + 20)°. Thx!
*January 5, 2015*

**Algebra**

Hi there. Can "x^2 - 10x + 22 = -2" be solved by taking the square root? Can "4x^2 + 8x + 3 = 0" be solved by taking the square root? If so, please show me an explanation.
*December 29, 2014*

**Algebra**

Mr. Zerman went shopping. In the first store he spent half of his money plus an additional dollar. At the second store he spent half of his remaining money plus an additional dollar. This pattern continued until he left the fifth store with no money left. How much money did he...
*December 22, 2014*

**Honors Physics**

Yes he will at .1m/s.
*December 18, 2014*

**Algebra**

A box is to be formed from a rectangular piece of sheet metal by cutting squares measuring 5 inches on a side and then folding the sides. The piece of sheet metal is twice as long as it is wide. If the volume of the box is to be 1760 in^3, what are the dimensions of the ...
*December 17, 2014*

**math**

the ratio of girls to boys in the chorus is 3:2. If there are 50 students in chorus, how many boys are there and how many girls?
*November 30, 2014*

**Optics**

How to find critical angle using n?
*November 2, 2014*

**Algebra**

An herbalist has 40 oz of herbs costing $4 per ounce. How many ounces of herbs costing $1 per ounce should be mixed with these 40 oz of herbs to produce a mixture costing $2.20 per ounce? oz
*September 27, 2014*

**math **

the sum of my digits is 13, my hundredths place is 3 less than 5, my ones place is 4 more than 3, my thousands place is even, what 4-digit numbers can I be
*August 20, 2014*

**statistics**

Construct a 95% prediction interval for the number of hours of sleep for an adult who is 45 years old
*July 19, 2014*

**science**

At a murder scene, you have started making an image of a computer’s drive. You’re in the back bedroom of the house, and a small fire has started in the kitchen. If the fire can’t be extinguished, you have only a few minutes to acquire data from a 10 GB hard disk...
*July 16, 2014*

**math**

Thanks,now I totally understand
*July 5, 2014*

**math**

X+3y+9=0 and x+3y-7=0 are parallel or not ,how to work out,can anyone show me please
*July 5, 2014*

**math**

please represent algebraic express 20 less than 19 divided by 3X
*July 1, 2014*

**Maths**

Find the derivative of y=1/x at x=1/4 Answer: 1/1/16
*June 30, 2014*

**algebra**

The population of Arizona was 4.2 million in 2000 and 6.9 million in 2008. If the population grew exponentially, which one of the following models the population as a function of time (in years since 2000)?
*June 15, 2014*

**Physics **

Two masses are connected by a string over an ideal pulley as shown. The coefficient of kinetic friction between m1 and the table surface is 𝜇. Find an expression for their common speed after the blocks have moved a distance L. You can assume that you know: m1, m2, L, ...
*May 30, 2014*

**Physics**

0.2295
*May 27, 2014*

**Physics**

The flux density through a 200 turn coil of area 8.5*10^-4 m squared changes from 0.03 T to 0.12 T in 15 mins. Calculate the induced emf in the coil.
*May 27, 2014*

**Chemistry**

The motor is connected from it's battery and used as a generator.On the axes(vertical is amps and horizontal is time) show the type of current it provides when it is rotated through 2 complete revolutions
*May 27, 2014*

**algebra**

Suppose that state’s record high temperature of 102 was set in 1930, and the record low of -14 was set in 1966. What is the range of these temperature extremes?
*May 26, 2014*

**algebra**

Complete the table of solutions 7x-2y =-21 X Y (X,Y) 3 ---- (---- , ----) --- 0 (---,---)
*May 26, 2014*

**ALGEBRA**

How many inches of molding are needed to produce the square picture frame 13" 1/8
*May 25, 2014*

**ALGEBRA**

Complete the table of solutions 7x-2y =-21 X Y (X,Y) 3 ---- (---- , ----) ----- 0 (---,---)
*May 25, 2014*

**ALBEBRA**

INPUT ---------- OUTPUT X 2x-x/2 -10 -10
*May 25, 2014*

**ALGEBRA**

Suppose that state’s record high temperature of 102 was set in 1930, and the record low -14 of was set in 1966. What is the range of these temperature extremes?
*May 25, 2014*

**ALGEBRA**

In the table of solutions, which entry is the y-intercept of the graph and which entry is the x-intercept of the graph? x y (x, y) 4 0 (4, 0) 0 2 (0,2) –4 –4 (–4, –4)
*May 25, 2014*

**ALGEBRA**

A student inherited $4,200 and deposits x dollars in American Savings. Write an expression to show how much she has left to deposit in a City Mutual account.
*May 25, 2014*

**geometry**

if you add 10% to each side of a triangle what is the % of gain
*May 18, 2014*

**Math**

Admission to a museum cost $12 for adults and $7 for children. A group of 35 people attending the museum paid a total of $315 in admission fee. Write a system of equations to represent the situation. Let A represent the number of adults admissions and C represent the number of...
*March 25, 2014*

**Chemistry**

Alternative answers: A)10 B)13 C)1.9 D)3.8 E)12
*March 16, 2014*

**Science**

Determine the pkb of methylamine if the kb is 4.4*10^-4.
*March 16, 2014*

**Algebra**

what is the expression that is equivalent to -2(x-3)
*March 15, 2014*

**Science**

runoff does increase ersion
*March 3, 2014*

**math**

I am helping my daughter and I need help on this question in the number 57,733 contains two sets of digits in which one digit is ten times as great as the other what are the values of the digits in each set help please!!!!
*February 15, 2014*

**math**

In the number 7,725 which places contain digits where one digit is ten times as great as the other ?
*February 15, 2014*

**math**

a quadrilateral has two angles that measure 88 and 62. the other two angles are in a ratio of 16:19. what are the measures of those two angles?
*January 27, 2014*

**MICROECONOMICS**

Explain the relationship between labor earnings and the distribution of income
*December 4, 2013*

**MICROECONOMICS**

How have insights from the field of psychology influenced the thinking of economists in recent years?
*December 4, 2013*

**MICROECONOMICS**

Explain the relationship between labor earnings and the distribution of income
*November 28, 2013*

**maths **

2/π ∫ π - 0 t^2 cos (nt) dt how to solve this anyone?
*October 5, 2013*

**MATH**

Chantal has a flower bed. She has three types of flowers, Daffodils, Hyacinths and Tulips. She has 8 Daffodil bulbs, 10 Hyacinths bulbs and 12 Tulip bulbs. For every 3 bulbs that were planted, how many hyacinth bulbs were planted? Was it 1,2,3, or 5?
*September 19, 2013*

**physics**

A rock is dropped into the Grand Canyon. It takes 18 seconds to hit the bottom. Calculate how deep the canyon is.
*August 26, 2013*

**english**

choose the answer that displays the correct spelling of the plural form of the words in parentheses
*July 5, 2013*

**Math**

What would be the present value of $365 a year for 20 years at a 14 % discount rate.
*June 18, 2013*

**Finance**

IF i AM PAYING $1,626.83 MONTH FOR 15 YEARS AT 4% WHAT WOULD THE ORIGINAL MORTGAGE AMT BE
*June 18, 2013*

**Business**

Please edit my answers below the questions for correct sentencing In the following statement, a business owner attempts to explain and justify his slow growth in his business. I limit my growth pace and every effort to service my present customers in the manner they deserve. I...
*June 6, 2013*

**Algebra**

What values for θ (0≤θ≤2π) satisfy the equation 2cos θ+1=-cos θ?
*May 29, 2013*

**Chemistry**

The volume of a gas sample is 200 L at 740 torr. What is its volume at 760 torr?
*May 22, 2013*

**Chemistry**

The volume of a gas sample is 200 L at 740 torr. What is its volume at 760 torr?
*May 22, 2013*

**math**

They skated 14 miles in 2 hours.if they skated at a constant rate, how many miles did they skate in 1 hour
*April 24, 2013*

**Physics**

1/4h
*April 23, 2013*

**pre calculus**

what is 36.1 and 50.8 rounded to three decimal places? I was never really good at this stuff....please help!
*April 22, 2013*

**college**

Is this really a college question? Seems too easy. Let x represent the base of the triangle (pole to spot where the wire is). Since you said that the height of the pole is 6 feet longer than the base of the pole to where the wired is anchored. Now 6+x. 27 is the hypotenuse. ...
*April 21, 2013*

**Physics**

c) please anyone!
*April 9, 2013*

**math**

. Ms. Alison drew a box-and-whisker plot to represent her students’ scores on a mid-term test. Josh received 72 on the test. Describe how his score compared to those of his classmates. (1 point)About 25% scored higher; about 75% scored lower. Everyone scored higher. No ...
*April 8, 2013*

**math**

What percentage of the total students chose skateboarding? (1 point) 10% 20% 30% none of these if 2 bys and 1 girl chose skateboarding? What percentage of the boys chose walking? (1 point) 30% 45% 25% none of these
*March 27, 2013*

**Algebra**

Express in a different or equivalent form. - 11x + 3 / 4x - 3
*March 11, 2013*

**Math**

How do I find the dimensions of a rectangle if the length of the rectangle is 1 yard more than twice its width, and the area of the rectangle is 66 yards^2 .
*March 7, 2013*

**Physics**

Assume that in interstellar space the distance between two electrons is about 0.87 cm. The electric force between them are repulsive. Calculate the electric force between these two electrons. The value of the Coulomb constant 9 × 109 N · m2/C2 and the elemental ...
*March 3, 2013*

**Math (Simplifying Expressions)**

How would I solve this? 48÷4x5-2x5
*February 25, 2013*

**Calculus**

y= (t^3 + t)/(t^4 - 2) y'=
*February 22, 2013*

**Calculus**

On what interval is the function f(x)= x^3 - 3x^2 + 7x concave up?
*February 21, 2013*