Saturday

August 27, 2016
Total # Posts: 616

**Geometry**

Triangle XYZ below is an isosceles triangle with legs XY and ZY. QR and QS are perpendicular bisectors of triangle XYZ. Find the length of segment QR if QR = ½ x and QS = -½ x + 4.
*August 15, 2016*

**math**

Hi, I have been trying to figure this one math problem for awhile and I am stuck. I believe the answer is between A or B. Skip is practicing tennis serves against a wall. The distance between Skip and the tennis ball, in feet, at any time T, measured in seconds, is D(T)=-1.5(T...
*May 30, 2016*

**calculs**

Can you give me the answer. I have answer it almost in 1 week
*May 18, 2016*

**Geometry**

What is the cordinates for the midpoint with the endpoints given? (3,5) (-2,0)
*May 13, 2016*

**Chemistry**

Concentrated nitric acid is 70% HNO3 and 14.7 M. What is the density of the solution?
*May 12, 2016*

**Chemistry**

What is the oxidation state of chromium in the dichromate ion, Cr2O7 (2-)
*May 4, 2016*

**Chemistry**

What is the oxidation state of chromium in cr2o7^-2
*May 4, 2016*

**Science**

B A C D 100% on this quiz
*April 25, 2016*

**Science **

1. Which of the following could be an engineering project that could better protect the planet? -finding a new landfill site -designing a better trash compacter -deciding which product can be recycled*** -growing microbes that eat oil 2. Engineers who are working to find ...
*April 25, 2016*

**math( surface area )**

The height of a rectangular prism is 20 centimeters. It has a surface area of 2,400 square centimeters. What are two possible sets of lengths and widths? Find one set of dimensions with l and w equal in length as well as a set of dimensions that are not equal.
*April 4, 2016*

**math( surface area)**

write a product that represents the surface area of any rectangular prism with length l, width w, and height h. Expain.
*April 3, 2016*

**Math**

Yes thank you so much!!
*March 31, 2016*

**Math**

The length of the hypotenuse of a right triangle is 2m more than the longer leg. The longer leg is 7m longer than the shorter leg. Find the perimeter of the triangle. ( please explain as you go)
*March 31, 2016*

**chemistry**

If you place 5 mg NiCO3 in 1 L of pure water, does all the salt dissolve? If not, how much salt remains undissolved? The Ksp for NiCO3 is 6.6x10^-9 M.
*March 24, 2016*

**chemistry**

For CaCrO4, Ksp= 7.1x 10^-4. How many grams of Na2CrO4 must be added to 200 mL of .250 M Ca(NO3)2 to just initiate precipitation?
*March 24, 2016*

**History**

What do you think it is?
*March 17, 2016*

**U.S. History (Check, Please!)(REED)**

What's the problem?
*March 17, 2016*

**Math**

8 times 2 is 16, plus 6. That would equal 22, so it would have to be 4 and 12. 12 times 2, plus 4. 24 plus 4 equals 28, which is an answer choice. Thanks Ms. Sue!
*March 15, 2016*

**Math**

So,it couldn't be 2 and 24, because that would equal 52, right? So it would have to be either 4 and 12 or 6 and 8.
*March 15, 2016*

**Math**

Oh god, I'm so stupid, they would all equal 48! HAHA!! Oops.
*March 15, 2016*

**Math**

2 and 24, 3 and 16, 4 and 12, 6 and 8.
*March 15, 2016*

**Math**

A = L times W, right? 3 times 16 is 48. I am confused.
*March 15, 2016*

**Math**

If the area is 48 square ft., the length would be 16 ft., and the width would be 3 ft. Correct?
*March 15, 2016*

**Math**

David wants to build a pen for his goat. He wants the area of the pen to be 48 square feet. If the length and width of the pen are whole numbers, which of the following could be the perimeter of the pen? - p = 26 ft - p = 28 ft - p = 30 ft - p = 36 ft
*March 15, 2016*

**geometry/algebra**

The algebraic expression of a dilation is (x, y) changes to (1/a x, 1/a y). If the dilation is an enlargement, give three possible values of a. Anything over 1 for the denominator would make the x and y values smaller. So what would the possible values be for a?
*March 6, 2016*

**English**

Edgar Allan Poe uses a pair of rhyming words to describe trying to hold sand in “A Dream Within a Dream.” In a short paragraph, tell what the words are and how they express the speaker’s feelings. Use details from the poem to support your answer. I just need ...
*February 26, 2016*

**Algebra**

James has a 6-ft board that is 24 in. wide. He wants to cut it into five pieces to make a small bookshelf with two shelves. The front and back will not be covered. What should be the dimensions of the bookshelf to maximize the volume and use all of the 6-ft board?
*February 22, 2016*

**criminal justice **

Schlomo occasionally drinks beer with friends. His drinking doesn’t interfere with his job or personal obligations. He gets a pleasant “buzzed” feeling from two beers and doesn’t feel a need to drink more. Alcohol has not caused him any physical or ...
*February 1, 2016*

**History of Drugs**

The Great Experiment is often used when referring to? I think it is the Prohibition Era, The Eighteenth Amendment but I am not sure.
*February 1, 2016*

**physics**

A batter hits a ball, causing it to leave the bat at 135 m/s and at an angle of 18.3 degrees from the horizontal. If the baseball field is level, and ignoring the height at which the batter hits the ball, how far (horizontally, in meters) away from the batter does the ball hit...
*January 27, 2016*

**physics**

supposedly the answer to the second part of the question is y = −6.5×10−14 m any insight?
*January 27, 2016*

**physics**

In a cathode-ray tube, electrons are projected horizontally at 1.0×10^6 m/s and travel a horizontal distance 11.5 cm across the tube. How long are the electrons in flight? Express your answer to two significant figures and include the appropriate units. Find the vertical...
*January 27, 2016*

**physics**

how do you get the 1135? I must not be calculating something correct
*January 27, 2016*

**Chemistry**

Balance the equations for oxide reduction method: KMnO4 + KCl ---> MnCl2 + Cl2
*January 26, 2016*

**math**

Find the product of 5 and 4 . Express your answer in simplest form.
*January 21, 2016*

**physics**

an aluminum cylinder, of height h=2ocm and of radius r=1ocm, rests with its base on a horizontal table. Density of aluminum P=2700kg/m^3 a-calculate the weight of the cylinder take g=10N/kg b-what is the value of the force exerted by the table on the cylinder? c-deduce the ...
*January 20, 2016*

**pre calc**

Suppose you get on a Ferris Wheel that has a diameter of 40 meters and turns at a rate 1.5 revolutions per minute (the period is not 1.5 ) the height above the ground in meters, of your seat after t minutes can be modeled by an equation. Assume you get on the ride at t=0 min ...
*December 9, 2015*

**Riddle**

Reflection
*November 14, 2015*

**southwest**

5650 is compounded semiannually at 18% for 16 years
*November 11, 2015*

**Physics**

You are installing a new spark plug in your car, and the manual specifies that it be tightened to a torque that has a magnitude of 45.8 N*m. Using the data in the figure below (L = 0.287 m and θ = 49.6°), determine the magnitude F of the force that you must exert on ...
*November 9, 2015*

**math**

A culture starts with 8300 bacteria. After one hour the count is 10,000. (a) Find a function that models the number of bacteria n(t) after t hours. (Round your r value to three decimal places.)
*November 6, 2015*

**math**

A wooden artifact from an ancient tomb contains 70% of the carbon-14 that is present in living trees. How long ago was the artifact made? (The half-life of carbon-14 is 5730 years. Round your answer to the nearest whole number.)
*November 6, 2015*

**Algebra **

If one earthquake is 160 times as intense as another, how much larger is its magnitude on the Richter scale? (Round your answer to one decimal place.)
*November 6, 2015*

**Physics**

Starting from rest at t = 0 s, a wheel undergoes a constant angular acceleration. When t = 1.6 s, the angular velocity of the wheel is 5.9 rad/s. The acceleration continues until t = 19 s, when the acceleration abruptly changes to 0 rad/s2. Through what angle does the wheel ...
*November 4, 2015*

**math**

its 9mm:)
*November 3, 2015*

**Math**

First vehicle is traveling at 50 miles per hour. Second car is traveling at 65. They ate 15 feet apart when the second cars slammes on break. Will they have a empack and at what speed.
*October 28, 2015*

**math**

Sharon spent $2 on a magazine; then she spent half of the rest of her money on shoes. She spent half of her remaining money on lunch. She has $12 left. How much money did sharon start with?
*October 21, 2015*

**Physics**

From what height would a car weighing 9990 N have to fall to gain the kinetic energy equivalent to what it would have when traveling 64.87 mi/hr?
*October 21, 2015*

**Physics**

A 1600 kg block of granite is pulled up an incline that has an angle of inclination θ = 20 ° with a constant speed of 1.21 m/s by a steam winch (see Figure). The coefficient of kinetic friction between the block and the incline is 0.09. How much power must be supplied...
*October 19, 2015*

**Physics**

I don't understand this at all! use the position equation s=-16t^2 +v0t+s0 to write a function that represents the situation. Find the average rate of change from t1 to t2. a) An object is thrown upward from a height of 6 feet at a velocity of 64 feet per second.... t1=0...
*October 19, 2015*

**Physics**

A bullet is fired from a rifle that is held 1.70 m above the ground in a horizontal position. The initial speed of the bullet is 1078 m/s. Calculate the time it takes for the bullet to strike the ground.
*October 19, 2015*

**math**

geologists estimate that earths temperature rises about 10 degrees celsius for every kilometer k below earths surface. suppose it is 50 degrees celsius on the surface of the earth. What is the formula for the temperature t in degrees celsius at a dept of k km?
*October 5, 2015*

**physics**

A rock is dropped from a tree of height 22 m into a lake (depth 4.0 m) below. After entering the water, the rock floats gently down through the water at a constant speed of 1.4 m/s to the bottom of the lake. What is the total elapsed time?
*October 4, 2015*

**science**

True or False? Can someone check to see if I am correct. If not, why? a) Two samples of matter have the same volume must have the same density FALSE: could have different densities b) two samples of matter having the same volume and the same number of particles must have the ...
*September 26, 2015*

**Science**

True or False? Can someone check to see if I am correct. If not, why? a) Two samples of matter have the same volume must have the same density FALSE: could have different densities b) two samples of matter having the same volume and the same number of particles must have the ...
*September 26, 2015*

**science**

The modern atomic model includes electrons orbiting the nucleus. Which of the following parts of Dalton's atomic model was disproved by the discovery of the electron? - Atoms are tiny particles. - Atoms cannot be divided into smaller parts . - Atoms have specific mass and ...
*September 23, 2015*

**Math**

Geddy has a pool with a volume of 25.0m^3. It costs $2.35 per cubic foot (ft^3) to clean. How much will it cost to clean the pool?
*September 22, 2015*

**language arts**

ms. sue please help the characterization of the children is an important part of "The Story-Teller". which of the following quotes from the story offers the best evidence for the character of Cyril being mischievous? A. the children moved reluctantly to the window. &...
*September 16, 2015*

**Math**

the area of a square is equal to one less than one-half its perimeter. How long is each side? (A=s squared and P=4s, where s represents the side length of the square)
*August 29, 2015*

**5th grade math**

need in layman's terms, please, thank you
*August 20, 2015*

**Math**

but the 2 isn't divisible by 5?
*August 20, 2015*

**Math**

yes, it does, thank you
*August 20, 2015*

**Math**

thanks so much :)
*August 20, 2015*

**Math**

so it's 9,405,271? I'm the Grandmother and this 5th grade work is beyond me. thank you
*August 20, 2015*

**Math**

you are right, 9,805,472
*August 20, 2015*

**Math**

7 digit number no repetition of numbers digit 5 in thousands place, greatest digit in the millions place, digit in the hundred thousands place is twice the digit in the hundreds place, digit in the hundreds place is twice the digit in the ones place, digit in the tens place is...
*August 20, 2015*

**Math**

this is way out there for us, she's only in 5th grade, but thank you
*August 20, 2015*

**Geometry**

Anybody?
*June 22, 2015*

**Geometry**

A carpenter checks to see if a board is warped by laying a straightedge across the board in several directions. State the postulate that is related to this procedure.
*June 22, 2015*

**Language Arts**

Does anyone have the correct answers for #1-6 and #8-18
*May 16, 2015*

**math**

2.If a sledgehammer that weighs 18 newtons on Earth will weigh about 4 newtons on the planet Namar, then your weight on Namar would be about ___ times your weight on Earth. A. 0.25 B. 4 C. 0.5 D. Not enough information
*May 14, 2015*

**math**

thxs
*May 13, 2015*

**math**

never mind
*May 13, 2015*

**math**

is it $3.75 because the unit rate is $2.50/1 and to get 10 you multiply the denominator, 1, by 15 and what u do to the bottom you do to the other so $2.50*15=37.5 and it equals 37.5/10 which is 3.75
*May 13, 2015*

**math**

At Frugal Foods a loaf of bread cost about $1 in 1980. In 2013, the loaf of bread cost $2.50. 1.A ratio is a comparison of two amounts by division. What is the ratio of the cost of a loaf of bread in 2013 to the cost in 1980? *$2.50/1 2.Assuming the price of clothing increased...
*May 13, 2015*

**math **

maya made a sign with an area of 48 square centimeters What could her sign look like
*May 5, 2015*

**chem**

For the reaction: N2+3H2<--->2NH3 4.000 mol N2, 2.000 mol H2, and 6.000 mol NH3 are placed in a 2.000 L container and allowed to reach equilibrium. When equilibrium is established the [H2]=2.77 M. Calculate the equilibrium concentrations of nitrogen and ammonia. ...
*April 19, 2015*

**chem**

For the reaction: N2+3H2 <-----> 2NH3 1.000 mol N2 and 1.000 mol H2 are placed in a 1.000 L container and allowed to establish equilibrium. When equilibrium is established the [N2] =0.921M. Calculate the equilibrium concentrations of hydrogen and ammonia. Calculate K.
*April 19, 2015*

**chem**

For the reaction: A+B <-----> 2C (all gases) 2.0 mol A, 2.8 mol B and 1.0 mol C are placed in a 2.0 L container and allowed to reach equilibrium. When equilibrium is established [C]=0.75 M. Calculate all equilibrium concentrations. Calculate K. I am so confused!
*April 19, 2015*

**math**

June has twice as much money invested at 5% simple annual interest as she does at 4 %. If her year income from the two investment is $315 how much does she have at each rate?
*March 20, 2015*

**English**

11- Before Derrell made a serious purchase, such as a car, he would study the competition?
*March 16, 2015*

**English**

10- Before finishing the meeting, the chair of the group offered many ideas?
*March 16, 2015*

**English**

8- We should consider traveling to China this summer?
*March 16, 2015*

**English**

@Ms Sue
*March 16, 2015*

**English**

could 6 be The faculty had made recommendations for the honor society?
*March 16, 2015*

**English**

I know the answers to 3, 5, 7, and 9
*March 16, 2015*

**English**

Identify awkward or pretentious diction in the following sentences, and revise each sentence as necessary to improve clarity. 2. Let’s have a discussion of the essay you read for homework. 3. Khaya finally came to the realization that she preferred research to teaching. 4...
*March 16, 2015*

**science**

A charge of +9.0 nC and a charge of +4.0 nC are separated by 50.0 cm. Find the equilibrium position for a −1.0 nC charge as a distance from the first charge. The Coulomb charge is 8.98755 × 109 N · m2 /C 2 . Answer in units of cm.
*March 13, 2015*

**Chemistry**

I need to use those numbers to find the final concentrations for each individual solution.
*February 24, 2015*

**Chemistry**

I have to use the given concentration of 7.03 micromoles/liters to determine the concentration for the following dilutions. 1. mL stock solution-2 mL distilled water-8 2. mL stock solution-4 mL distilled water-6 3. mL stock solution-6 mL distilled water-4
*February 24, 2015*

**English**

@ms sue, how about "How did the pilot know where in the air he was?"
*February 18, 2015*

**English**

Identify the simple sentences in the following paragraph. I know the first and third sentences are simple. The air show announcer hushed. He had been squawking all day, and now he quit. The crowd stilled. Even the children watched dumbstruck as the slow, black biplane buzzed ...
*February 18, 2015*

**geometry**

i need help on a question that involves finding the "value of the variable" ive started the question but im stuck of how to continue .its a right triangle which hypotenus length is cut by a altitude line "w+9" .the lengths cut are 8 and 18 .
*February 11, 2015*

**Science**

California's volcanoes formed as a result of colliding boundaries.
*February 6, 2015*

**Chemistry**

the titration of an ascorbic acid requires 18.5 mL of .0105 M KIO3. how many mmol of ascorbic acid were in this sample?
*February 4, 2015*

**Science**

there isn't a Makayla Caldwell in mrs formissano's stupid
*January 26, 2015*

**English 10 help please**

metaphoe
*November 18, 2014*

**Trig**

the angle of elevation to the sun is 65 degrees. A building casts a shadow 16m long. What is the height of the building to the nearest meter?
*November 17, 2014*

**Algebra**

You invest an initial $4,500 in an account that has an annual interest rate of 4.5%, compounded daily. How much money will you have in the account after 10 years? Round your answer to the nearest whole number.
*November 12, 2014*