# Posts by sally

Total # Posts: 1,200

**algebra**

solve by addition method x +3y +z =6 3x + y – z = -2 2x +2y – z = 1

*March 30, 2012*

**physics**

A 67.5-kg basketball player jumps vertically and leaves the floor with a velocity of 1.66 m/s upward. (Take upward as positive and forward as positive.) (a) What impulse does the player experience? magnitude direction (up,down, back or zero) (b) What force does the floor exert...

*March 29, 2012*

**physics**

A 0.255-kg volleyball approaches a player horizontally with a speed of 14.2 m/s. The player strikes the ball with her fist and causes the ball to move in the opposite direction with a speed of 22.0 m/s. (a) What impulse is delivered to the ball by the player? (b) If the player...

*March 29, 2012*

**physics**

A force of magnitude Fx acting in the x-direction on a 2.50-kg particle varies in time as shown in the figure below. (a) Find the impulse of the force. (b) Find the final velocity of the particle if it is initially at rest (c) Find the final velocity of the particle if it is ...

*March 29, 2012*

**algebra**

Could someone please help me with this? Is it possible to subtract two polynomials, each of degree 3, and have the difference be a polynomial of degree 2? If so, give an example. If not, explain why not. thanks

*March 28, 2012*

**algebra**

Could someone please help me with this? (1) If x is a nonzero real number, is x–2 always positive, always negative, or positive or negative depending on whether x is positive or negative? Explain your answer.

*March 28, 2012*

**language arts**

try google.

*March 26, 2012*

**physics please help!!**

figures should help you. draw the figure of the radar gun and try solving it.

*March 26, 2012*

**Calculus**

yes ur correct.

*March 26, 2012*

**Chemistry**

How many mL of a .10 M NaOH solution are needed to neutralize 15 mL of .20 M H3PO4 solution? Write nbalanced equation: 3NaOH + H3PO4 → Na3PO4 + 3H2O 3mol NaOH recat with 1mol H3PO4 In all these titration questions, do it the simple way: Use the following equation: Ma*Va/...

*March 26, 2012*

**chemistry**

ok then no change.

*March 26, 2012*

**chemistry**

"!" Do you mean ->? No change because you are adding more solid to an equilibrium.

*March 26, 2012*

**Organic Chemistry**

Why would the presence of crystals of sample at the starting line cause streaking on a TLC plate?

*March 19, 2012*

**Economics**

Consider an economy with a constant nominal money supply, a constant level of real output Y = 100, and a constant real interest rate, r = 0.10. Suppose that the income elasticity of demand is 0.5 and the interest elasticity of money demand is –0.1. By what percentage ...

*March 19, 2012*

**english**

@Ms. Sue Thank yo, but I was looking more for an explanation on the 3 main motifs because I am having a hard time understanding where to find them! :(

*March 12, 2012*

**english**

What are 3 main motifs in Act III of Hamlet?

*March 12, 2012*

**business math**

an office worker earns $3,450 monthly. the worker ios kmarried and claims two exemptions. find the FIT to be withheld from his monthly check using the percentage method ans using the wage bracket method.

*March 11, 2012*

**physics**

A skater of mass 74.5 kg initially moves in a straight line at a speed of 5.10 m/s. The skater approaches a child of mass 37.5 kg, whom he lifts on his shoulders. Assuming there are no external horizontal forces, what is the skater's final velocity?

*March 10, 2012*

**english**

sorry its connotations

*March 9, 2012*

**english**

what are some contractions of hawaii

*March 9, 2012*

**english**

thank you

*March 9, 2012*

**english**

i mean is a musical group for four instruments. is an absolute phrase

*March 9, 2012*

**english**

he learned to play in a quart a musical group for four instruments ithink its an abslout phrase

*March 9, 2012*

**Chemistry**

Fluorine reacts with oxygen to yield oxygen difluoride. 2 F2(g) + O2(g)<--> 2 OF2(g) What is the value of K if the following concentrations are found at equilibrium: [O2]= 0.200 mol/L, [F2]=0.0100 mol/L, and [OF2]=0.0633 mol/L Chemistry - DrBob222, Thursday, March 1, ...

*March 2, 2012*

**Chemistry**

I get 8.01 for an answer, but webassign says it's wrong. [0.0633]^2/[o.0100]^2[o.200]=8.01378

*March 1, 2012*

**Chemistry**

Fluorine reacts with oxygen to yield oxygen difluoride. 2 F2(g) + O2(g)<--> 2 OF2(g) What is the value of K if the following concentrations are found at equilibrium: [O2]= 0.200 mol/L, [F2]=0.0100 mol/L, and [OF2]=0.0633 mol/L

*March 1, 2012*

**Math**

13 people take a test & 11 passed what percentage passed

*March 1, 2012*

**Math**

You want to have 1.5 million in real dollars in an account when you retire in 40 yeras. the nominal return on your investment is 11 percent and the inflation rate is 3.8 percent. What real amount must you deposit each year to achieve your goal? My answer is this correct: real ...

*February 29, 2012*

**geometry**

if a is (3,0) and b is (11,6) and ab is 2x+4 then what does ab equal?

*February 29, 2012*

**calculus**

x (to the power of 3) + 40 / y - (10 + 3) what is the value of the expression when x=4 and y=8?

*February 29, 2012*

**Math**

undefined is what % of undefined?

*February 29, 2012*

**Calculus and Vectors**

what is g and h supposed to be?

*February 27, 2012*

**Calculus and Vectors**

A bald eagle flying horizontally at 48km/h drops it's prey from a height of 50m. a)what is the prey's vertical velocity when it hits the ground? b)when is the vertical speed greater than the horizontal speed?

*February 27, 2012*

**physics**

Limo kicks a ball vertically upwards from 1m above the ground at 18m/s. It rises to its highest point and then falls down, just getting caught on a branch 5.5m above the ground. (ignore any sideways movement) How long is the ball in flight?

*February 27, 2012*

**English Literature**

I need help with "THe Noisless Flash" from herishoma written by john hersey. I have a project and my job is to fina and record two objective details from the character Reverend Tanimoto's account. Then, change those details to subjective ones. Next, find and ...

*February 17, 2012*

**Math**

Is 4^33 + 3^44 divisible by 5? Please help ASAP. This is due tomorrow. Thank you very much :)

*February 15, 2012*

**physics**

What is the weight of a 12 kg mass on the moon if the gravitational acceleration (g) was only .8 m/s/s?

*February 14, 2012*

**math**

the bulletin board is 48 inches long and 24 inches wide. How many yards would they need for the trim?

*February 11, 2012*

**physics**

A small mailbag is released from a helicopter that is descending steadily at 2.20 m/s. How far is it below the helicopter? D= What if the helicopter is rising steadily at 2.20m/s? D=

*February 9, 2012*

**english**

Need help with writing an allegorical timeline of high school life (4 yrs.)

*February 9, 2012*

**math**

1/2t-1/6(4-10)<0

*February 7, 2012*

**math**

1/2-m/22>-1/11

*February 6, 2012*

**math**

A woman has a total of $9,000 to invest. She invests part of the money in an account that pays 5% per year and the rest in an account that pays 12% per year. If the interest earned in the first year is $730, how much did she invest in each account?

*February 6, 2012*

**Physics**

A hiker, who weighs 990 N, is strolling through the woods and crosses a small horizontal bridge. The bridge is uniform, weighs 3550 N, and rests on two concrete supports, one at each end. He stops one-fifth of the way along the bridge. What is the magnitude of the force that a...

*February 6, 2012*

**math**

...A woman has a total of $9,000 to invest. She invests part of the money in an account that pays 5% per year and the rest in an account that pays 12% per year. If the interest earned in the first year is $730, how much did she invest in each account?

*February 5, 2012*

**algebra**

The third angle in an isosceles triangle is 56° more than twice as large as each of the two base angles. Find the measure of each angle.

*February 5, 2012*

**intermediate algebra**

A triangle is such that the largest angle is 11 times the smallest angle. The third angle is 27° less than the largest angle. Find the measure of each angle. (Enter solutions from smallest to largest.)

*February 5, 2012*

**physics**

A train 400 m long is moving on a straight track with a speed of 80.1 km/h. The engineer applies the brakes at a crossing, and later the last car passes the crossing with a speed of 16.9 km/h. Assuming constant acceleration, determine how long the train blocked the crossing. ...

*February 3, 2012*

**physics**

A train 400 m long is moving on a straight track with a speed of 80.1 km/h. The engineer applies the brakes at a crossing, and later the last car passes the crossing with a speed of 16.9 km/h. Assuming constant acceleration, determine how long the train blocked the crossing. ...

*February 3, 2012*

**physics**

A car starts from rest and travels for 6.0 s with a uniform acceleration of +2.4 m/s2. The driver then applies the brakes, causing a uniform acceleration of −1.0 m/s2. If the brakes are applied for 3.0 s, determine each of the following. (a) How fast is the car going at ...

*February 3, 2012*

**Physics**

There is no given figure, you have to draw it from the question.

*January 31, 2012*

**Physics**

The figure shows the treatment of fractures of the humerus shaft with a cast of the upper arm bent by 100 to 110 degrees at the elbow joint, and an attached traction device. The traction device keeps the upper arm under tension to lower the risk of fracture dislocation due to ...

*January 31, 2012*

**physics**

on an exam i had to day this was the question:A painter of mass 50.0 kg stands on a platform of mass 40.0 kg and pulls on two ropes which hang over pulleys, as shown. He pulls each rope with a force of 400.0 N. Assuming a coordinate system where +y is up, calculate the y-...

*January 28, 2012*

**Algebra 1 Honors**

A diver is working 10 feet below the surface of the water. The gap between the water and the deck of his support barge is 1/8 of the total legnth of the air hose , and 3/4 of the total legnth remains on the reel. What is the maximum working depth without a change of equiptment...

*January 26, 2012*

**Business**

Firm A and firm B have debt-total asset ratios of 35% and 30% and ROA of 12% and 11%, respectively. Which firm has a greater ROE? I think that it is firm B since it has more equity financing its assets.

*January 24, 2012*

**math**

Solve 2³ -1 • (3 + 6) + 3

*January 23, 2012*

**math**

a jar of jelly beans contains 33 red, 52 white, 70 yellow ad 85 orange. To the nearest whole percent, what percent of the total jelly beans are orange?

*January 22, 2012*

**integrated algebra**

oh, okay, thank you!

*January 13, 2012*

**integrated algebra**

do i always have to mention the ors

*January 13, 2012*

**integrated algebra**

before looking at your answer i found the answer to be 0 too but like this: x^2-3x=0 x^2-3x+0=0 (x-0)(x+0)=0 0^2-3(0)=0 was my way right

*January 13, 2012*

**integrated algebra**

how can you solve x^2 - 3x = 0 i was using a formula as: x^2-7x+10=0 (x-5)(x+2)= 0 x-5=0 x+5 +5 x=5 I was following this formula but got stumped on this question please help.

*January 13, 2012*

**celebrity fame**

thanks alot

*January 10, 2012*

**celebrity fame**

so....... can u plz help me????????????

*January 10, 2012*

**celebrity fame**

it's not gossip!!!!!!!!!! it's for my research report about taylor lautner!!! its for my english grade

*January 10, 2012*

**celebrity fame**

taylor lautner and lily collins from the movie abduction?????

*January 10, 2012*

**celebrity fame**

are taylor lautner and lily collins going out????

*January 10, 2012*

**literacy**

who publishes Pediatric Nursing?

*January 9, 2012*

**history**

thank you

*January 6, 2012*

**history**

who came up with the idea of the school bus?

*January 6, 2012*

**u.s history**

who is the president of the united states?

*December 21, 2011*

**Solving trig functions! urgent please help!**

1.2sinxtanx + tanx-2sinx-1=0 2.6tan^2x-4sin^2x=1 Both functions is for 0<x<2pi thank you!

*December 20, 2011*

**Physics**

A circular hatch in the hull of a submarine has a radius of 40.0 cm. The submarine is 850.0 m under water. If atmospheric pressure above the ocean is 1.01 x 105 Pa and the air pressure inside the submarine is 1.31x 105 Pa, what net force is exerted on the hatch? (ρsw = ...

*December 19, 2011*

**Math**

Express 120:80 as a ratio. Express 60:560 as a fraction.

*December 6, 2011*

**Math - Data please help!**

1) A lotery has 1,000,000 tickets and draws 100 tickets to award prizes. How many tickets would you expect to have to purchase before you would win a prize? 2) Lesley claims she can roll triples with three dice in fewer than 20 rolls. a)what is the expected number of rolls ...

*December 6, 2011*

**French**

What are common types of music in Alsace? Do you know of any webstes with this info?

*December 3, 2011*

**French**

I am doing a report about Les Arts in the USA and in Alsace, France. Like music, painting, sculptures etc. Do you guys know of any website with information about the common types of paintings in Alsace or music played?? thanks

*December 3, 2011*

**arithmetic**

find the whole to 565 tires 12.4%what numbers of tires.

*December 1, 2011*

**math**

If rhys is late for his finite mathematics class, and the probability that he is on time is 3/4. however if he is on time, he is liable to be less concerned about punctuality for the next class and his probability being on time drops to 1/2. rhy is on time monday. find the ...

*November 19, 2011*

**math - please help!!**

thank you!

*November 19, 2011*

**math - please help!!**

A squash match is won when one player wins three games. This situation is often referred to as winning the "best-three-out-of-five" Barbara has a slight edge in winning each game with the odds in favour of 5 to 4 a) what is the probability that maria will win in ...

*November 19, 2011*

**data management**

If rhys is late for his finite mathenetucs class, ad the probability that he is on time is 3/4. however if he is on time, he is liale to be less concerned about punctuality for the next class and his probability being on time drops to 1/2. rhy is on time monday. find the ...

*November 19, 2011*

**science**

How long does a pathogen live in the body?

*November 12, 2011*

**math**

Thank you! I said the mean is 5 years more than the median.

*November 10, 2011*

**math**

The answer in the book says the mean is 8 years less than the median. Please explain.

*November 10, 2011*

**math**

336/12 = 28 right?

*November 10, 2011*

**math**

The mean is 28 and the median is 23???

*November 10, 2011*

**math**

In her art class, Ms. Walter has 12 students whose ages are listed below: 19, 20, 20, 20, 21, 22, 24, 24, 25, 25, 56, 60 She calculated the mean and the median of their ages. What is the relationship between these two values?

*November 10, 2011*

**Math**

Random variable X is normally distributed with mean 10 and standard deviation 2. Compute the following probabilities. a. Pr(X<10) b. Pr(X<11.04) I don't know where to start.

*November 10, 2011*

**math**

At 5:00 a.m. the temperature in Orlando, Florida was already 80 degrees F. By 3:00 p.m. the temperature had risen to 97 degrees F. What is the difference in the temperatures?

*November 3, 2011*

**Math (logic and problem solving)**

a rubber ball is dropped froma building that is 16 meters high. Each time the ball bounces, it bounces up half as high as the previous bounce. It is caught by Romer, the wonder dog, when it bounces 1 meter high. How many meters did the ball travel before it was caught?

*October 30, 2011*

**Science**

So the answer would be C (30 sec), right?

*October 26, 2011*

**Science**

I have to choose one option and also was among the A and B, but what makes me hesitate is that the A says "heat the salt crystals" instead "heat the water". And I'm thinking then the option B. You think after what I have observed. Sorry to bother much ...

*October 25, 2011*

**Science**

What do you think is the most reasonable answer???A or B?

*October 25, 2011*

**Science**

Please somebody help me. I need the answer today. HELP

*October 25, 2011*

**Science**

David has to dissolve salt crystals in the water. What would be the best thing to do to help the crystals dissolve quickly? A)heat the salt crystals B)crush the salt crystals C)cool the water in the tank D)use the largest salt crystals

*October 25, 2011*

**health**

Thinking in terms of the administrator and third-party payer perspectives, answer the following: What do you feel are the biggest weaknesses of the health care plan, and why?

*October 22, 2011*

**Algebra**

Thank you

*October 20, 2011*

**Algebra**

I'm working midpoints, distance, circles and standard form and general form. I have some questions with my answers to the first two-I'm stuck on #3 1. What is the distance between points (0,0) and (-3,5) My answer: sqrt34 2.What is distance between (3,1) and (10,8) My ...

*October 20, 2011*

**Chemistry**

You measure one edge of a cube using a meter stick marked in centimeters. Unfortunately, the edge is longer than 1 m. You mark the 1-m point on the cube edge with a pen and then, using a 15-cm ruler marked in millimeters, measure the remaining distance to be 1.40cm. (a) What ...

*October 16, 2011*

**microeconomics**

There is not enough information on these questions. I tried surfing the net but still not finding what I am looking for.

*October 9, 2011*