Sunday

May 29, 2016
Total # Posts: 564

**vectors**

The position vectors, r km, and the velocity vectors, v km/h, of two boats at a certain time are given by ... Boat A:at 10:00 am rA=6i+10j vA=8i–2j Boat B:at 10:30 am rB=8i+5j vB=4i+j ... determine the time at which boat B should head out so that the two boats do collide.
*February 7, 2013*

**Math 9**

My family went to starbucks. We ordered 3 drinks. My daughter's drink was .90 cents less than my drink and my sons drink was $2.20 more than my drink. The total bill was $12.90. How much was each drink? Use algebra. Please help me, thanx sorry I had to repost this question...
*February 6, 2013*

**Math 9 **

My family went to starbucks. We ordered 3 drinks. My daughter's drink was .90 cents less than my drink and my sons drink was $2.20 more than my drink. The total bill was $12.90. How much was each drink? Use algebra. Please help me, thanx
*February 6, 2013*

**math**

You guys do an excellent job helping kids.Thank you :)
*February 2, 2013*

**math **

I have a question is this cheating when we ask questions from our school work ? Wouldn't our on line school know we are kids are doing this ? What is an ethical homework question ? Curious..
*February 2, 2013*

**Math 9 algebra**

Thank you
*January 26, 2013*

**Math 9 algebra**

A mechanic charges $70 an hour plus the cost of parts to repair a vehicle. The parts cost $215 for the repair on Tamara's car. A) write an expression for the total cost, C, of repairing Tamara's car for any numbers of hours, n. B) use the expression you created in part...
*January 26, 2013*

**Calculus 1**

(a) What is the continuous percent growth rate for P=130e^0.07t , with time, t , in years? (b) Write this function in the form P=P0a^t. What is the annual percent growth rate? Round your answer to two decimal places. I tried it but now I'm just more confused. How do I do ...
*January 24, 2013*

**math**

Find a fraction that reduces to 3/4 when both the numerator and denominator are decreased by i, and reduces to 4/5 when both the numerator and denominator are each increased by 1. I know the answer is 7/9, but i dont know how to solve (i must use a system of equations).
*January 23, 2013*

**Chemistry**

6.326
*January 18, 2013*

**4th grade math**

oh i know now xD
*January 14, 2013*

**4th grade math**

I don't know what the rule is
*January 14, 2013*

**4th grade math**

i don't get what u Kineda is saying idk what kaitlyn is saying idk what psydag is saying either
*January 14, 2013*

**Math 9**

Thanks :)
*January 13, 2013*

**Math 9 **

use exponent rules to simplify. Write as a single power, dont need to find the value. [ (11/20)^4 x (11/20)^-8]^5 and (11/20)^-6 you cant leave an number to the power of a negative exponent. You have to change it like this ex : 2^-3 = 1/2^3 = 1/8
*January 13, 2013*

**algebra**

-A store sells 28 ounces of peanut butter for $2.24. The store also sells 32 ounces of teh same peanut butter for $2.40. Which is a better buy?
*January 10, 2013*

**World history**

12. The Delhi Sultanate ruler Radiyya first took power chiefly because A. she proved herself in battle. B. she wore men's clothes. C. she killed her brother. D. her father chose her as his successor. I chose c
*December 19, 2012*

**Spanish**

Ok can u Atleast check if it makes sense? I wanna pass
*December 7, 2012*

**Spanish**

I found it can i send a recording??
*December 7, 2012*

**Spanish**

R these correct??plz help En la 11. ___________ te llamé. De la oscuridad me llamaste. Reconocí tu 12. ___________. Reconociste la mia. “Vente para acá,” 13. ___________. Respondiste: “¿Dónde estás, papá? No te 14...
*December 7, 2012*

**Spanish**

😭 Thanks anyway:(
*December 7, 2012*

**Spanish**

No I listen to the cd and fill in the blanks
*December 7, 2012*

**Spanish**

Ok if I try fillin in the blancks then can u help
*December 7, 2012*

**Spanish **

Can someone plz fill in the blanks for me i can't find the cd and its due tomorrow??!!!!!!PLZZZZ En la 11.________ te llamé. De la oscuridad me llamaste. Reconocí tu 12.______. Reconociste la mia. "Vente para acá,"13.______. Respondiste: &...
*December 7, 2012*

**Spanish**

Thanks:)!!!!
*December 7, 2012*

**Spanish**

What's the correct way to say Then I was mistaken In Spanish?
*December 7, 2012*

**Spanish**

I meant :)
*December 7, 2012*

**Spanish**

It's alright:(
*December 7, 2012*

**Spanish**

Partido means party it was juego but thanks
*December 7, 2012*

**Spanish**

Nvr mind
*December 7, 2012*

**Spanish**

Which is he correct way to rite this sentence in Spanish We lost the game Perdimos el juego OR Perdimos el partido
*December 7, 2012*

**Spanish**

Bunch^^^
*December 6, 2012*

**Spanish**

Thanxz a buch:)!!!!
*December 6, 2012*

**Spanish**

And does la frente mean forehead?
*December 6, 2012*

**Spanish**

Ok:) thanks I Appreciate it!!!!!
*December 6, 2012*

**Spanish**

Can u correctly write these sentences in Spanish,plz? 1. I'm very proud of my son. 2. He can spell his name backward and forward. 3. What's his name? 4. How much does a new car cost in America? 5. You must be very rich. If tried already this is wat I got, plz double ...
*December 6, 2012*

**Spanish**

Thanks☺🙏
*December 6, 2012*

**Spanish**

Ok thanks r they gonna post it here?
*December 6, 2012*

**Spanish**

Are they correct
*December 6, 2012*

**Spanish**

6.tengo 7.tenemos 8.sra 9.venimos 10.sale 11.vuelven
*December 6, 2012*

**Spanish**

Conjugate the following irregular verbs in the simple present tense (indicative) 6. Tener(to have) Yo __________ 7. Tener(to have) Nosotros ________ 8. Venir(to come) Tú _________ 9. Venir( to come) nosotros________ 10. Salir( to leave). él/ella_________ 11. ...
*December 6, 2012*

**Math**

y/9 = 4 2/3 . Solve for Y . PLEASE HELP!
*December 6, 2012*

**Math**

One foot is 12 inches so how many times does 12 go into 60 ? When you are done dividing times your sum . 12x the answer.
*December 6, 2012*

**math**

LW=9 2L+2W=30 that is for a rectangle. 2*L/9+2L=30 20L=270 L=13.5, W=13.5/9=you do it.
*December 6, 2012*

**Child day care**

12. Which of the following is a factor that's very important to high-quality child care, but not often covered in state licensing regulations? A. The group size B. A fire safety clearance C. The staff-to-child ratio D. An annual visit by a representative of the licensing ...
*December 6, 2012*

**Child day care**

Plz sum1 answer my question
*December 5, 2012*

**Child day care**

10. Which of the following accreditation organizations does not have its headquarters in the United States? A. NAEYC B. AMS C. AMI D. CWLA
*December 5, 2012*

**Physical Science- Help Please!**

Suppose that you are given a 100 gram sample of a radioactive substance with a half-life of 32 days. How many grams will be left after 192 days?
*December 5, 2012*

**science**

Motion along a straight line, such as an axis, In this case,its the general movement of any object without the rotational component. In inertial translational motion without rotation the object always keeps the same inertial attitude. Rotation and translation together provide ...
*November 29, 2012*

**Physics**

A 16 kg box slides across the floor with an initial velocity of +7.8 m/s. It comes to a stop after sliding +14.6 m. How much friction was present?
*November 28, 2012*

**Physics**

A race car has a mass of 714 kg. It accelerates uniformly from rest, and travels 55 m in 2.95 s. What is the acceleration of the car? And, what is the net force acting on the car?
*November 28, 2012*

**seventh grade math**

if 1/2 in. = 1/3 feet then how many feet is 27 inches please someone help me ................ its drawn to scale the 27 inches
*November 28, 2012*

**7th grade math**

15-(2n)=13 n=1
*November 13, 2012*

**Math**

crate #1 8cds crate #2 8cds crate #3 8cds crate #4 8cds crate #5 8cds crate #6 8cds 6 x 8 = 48
*November 13, 2012*

**chemistry characterization & analysis of aspirin**

write a balanced equation that describes an acid base reaction that would allow you to determine the moles of aspirin present in a sample
*November 13, 2012*

**math**

If sandy and Betty have 192 toys in all and Sandygive Betty 50 toys so know sandy has three times as much as betty
*November 6, 2012*

**Math**

Czarina is working part time at a pastry shop baking cupcakes. If she works for 30 hours in one week on the average, how many hours a day does she work?
*October 17, 2012*

**Math**

The following are the number of apples sold in a certain market: 96, 186, 59, 171, 62, 58, 176, 91, 183, 167, 62, and 51. How many apples should an extra store sell to have a mean of 120?
*October 17, 2012*

**PHYSICS**

Sorry theta of the incline is equal to 61.4 degrees
*October 13, 2012*

**PHYSICS**

An object with a mass of 14kg lies on a frictionless incline. A rope attached to the mass runs parallel to the incline and is connected to a wall at the top of the incline. If the rope is considered to be in static equilibrium what is the tension of the rope in newtons?
*October 13, 2012*

**child day care**

A. Staff vacations
*October 11, 2012*

**physics **

The punter on a football team tries to kick a football so that it stays in the air for a long "hang time." If the ball is kicked with an initial velocity of 25.2 m/s at an angle of 58.5° above the ground, what is the "hang time"?
*October 4, 2012*

**Math**

121 x 3/11 =
*September 25, 2012*

**Math**

If a number is added to its reciprocal, the sum is 13/6, find the number.
*September 22, 2012*

**algebra2 PLEASE**

what are three important thing for an evaluating and inequalities and abs. values please and thank you
*September 20, 2012*

**algebra**

f(x)= 1/x-2 Plug in 1 for x. I keep getting -1 but the book says the answer is 3. Please help. Thanks
*September 7, 2012*

**social studies**

Under the federal system of the Constitution, the States _____. c)retain much of their earlier authority but submit to the ultimate sovereignty of the national government d)have about as much authority as local governments do in unitary systems like Great Britain I NARROWED IT...
*September 5, 2012*

**chemistry**

3960 J of heat are added to a 27.6 g sample of iron at 25 ◦ C. What is the ﬁnal temperature of the iron? The speciﬁc heat of iron is 0.449 J/g · K. Answer in units of K
*September 2, 2012*

**Social studys **

Who was Harry Houdini
*August 28, 2012*

**Place value whole numbers**

The tens digit is three times the thousands digit.
*August 28, 2012*

**Math**

6y/y^2+y-72 divided by y^6/x-y
*August 13, 2012*

**Anatomy and Physiology**

If one solution is 1000 x as acidic as another, how many pH units would there be between the two?
*July 26, 2012*

**Science**

What is the volume of 19 grams of flourine gas at stp?
*July 12, 2012*

**College Physics**

A convergent lens forms a real image 2.41 times the size of the object. The distancebetween object and image is 62.6 cm.Find the distance of the focal point fromthe center of the lens.Answer in units of cm
*July 3, 2012*

**Physics!!! :)**

The escape speed of a particular planet with a radius of 7.500e+6 m is 14,500 m/s. What is the mass of the planet?
*June 24, 2012*

**Algebra-HELP!!!!**

When Amy drives her car to work, the trip takes 1/2 hour. When she rides the bus, it takes 3/4 hour. The average speed of the bus is 12 mph less than her speed driving. Find the distance she travels to work.
*June 19, 2012*

**algebra**

When Amy drives her car to work, the trip takes 1/2 hour. When she rides the bus, it takes 3/4 hour. The average speed of the bus is 12 mph less than her speed driving. Find the distance she travels to work.
*June 19, 2012*

**algebra**

When Amy drives her car to work, the trip takes 1/2 hour. When she rides the bus, it takes 3/4 hour. The average speed of the bus is 12 mph less than her speed driving. Find the distance she travels to work.
*June 19, 2012*

**math**

The legs of a right triangle are 3 and 4 units long. Find the lengths, to the nearest tenth, of the segments into which the bisector of the right angle divides the hypotenuse. (Hint: Draw a picture of the triangle, label one segment of the hypotenuse "x," and solve. ...
*June 8, 2012*

**finance**

Alicia Cooper makes sure to contribute ten percent of her monthly earnings to her 401(k) plan at work. Her 401(k) plan allows her to invest in several different types of mutual funds. Which suggestion for the obtaining money she needs for investing is she following?
*May 21, 2012*

**child day care**

I think it's A.
*April 13, 2012*

**Math**

If you deposit 1200.00 annually with 5% compounded interest, how many years will it take to get to a million dollars?
*March 11, 2012*

**chemistry**

what is the effects of NH3(aq) and HCl(aq) on the CuSO4 or NiCl2 solution
*February 28, 2012*

**maths**

find the perpendicular distance from the corner of the triangle to the opposite side if the side is 25cm long
*February 16, 2012*

**Math**

Tony lines up 5 baseballs. They are as long as his pillow. He adds 15 more balls. How long is the line?
*February 14, 2012*

**english**

what is the analogy for monkey if cardinal is to bird as monkey is to?
*January 24, 2012*

**pre-calculus**

Write the first expression in terms of the second if the terminal point determined by the t is in the given quadrant: sin t, cos t; quadrant 2
*January 16, 2012*

**algebra**

evaluate 15^(2log base15(9))
*November 30, 2011*

**physics**

A car traveling at 91.0 km/h approaches the turnoff for a restaurant 30.0 m ahead. If the driver slams on the brakes with an acceleration of -6.40 m/s^2, what will her stopping distance be?
*November 20, 2011*

**math**

5 rounds up, so 85 would round up to 90.
*October 10, 2011*

**Probability**

Let Y be a Normal RV with mean 7 and standard devi- ation 4. a. Find P (Y = 7). b. Find P (Y < 5). c. Find P (Y ≥ 10). d. Find P (Y < 0). e. Find E[Y].
*October 10, 2011*

**Probability**

Consider an RV X with the following density given parameters α and γ . f (x) = {(1/γ)e^(-(x-α)/γ) if x>α {0 if x ≤ α. a. Find E[X]. b. Find V[X]. c. If α = 4, γ = 2, ﬁnd P (X > 8). d. Find P (X < α + 3&#...
*October 10, 2011*

**chemistry**

shoot, i wish i could remember the metal. she gave us the entire periodic information. how would i find the solution if I theoretically had the density?
*October 3, 2011*

**chemistry**

There is a ball with a mass of 1000 lbs. It's turned into wire with a diameter of 3.12 x 10^-1 How long is the wire? This is my crazy chemistry teacher's idea of a test...and I don't even think there's a solution. HELP ME
*October 3, 2011*

**math**

emilio can type 60 words in 1 minute marg can type half as many how many total words can emilio and marg type in 3 minutes
*September 27, 2011*

**math**

use the order of operations and the digit 4 four times to write problems that have the following answers 44 and 12
*September 27, 2011*

**physics**

A 30.0 g bullet strikes a 0.595 kg block attached to a fixed horizontal spring whose spring constant is 6.66 103 N/m and sets it into vibration with an amplitude of 21.8 cm. What was the speed of the bullet before impact if the two objects move together after impact? answer ...
*September 26, 2011*

**physics**

When a 69 kg person climbs into a 1000 kg car, the car's springs compress vertically by 2.9 cm. What will be the frequency of vibration when the car hits a bump? Ignore damping. answer should be given in Hz.
*September 26, 2011*

**Algebra**

2/5x^4-23x^2+1/15 x^4+5x^2-5 Simplify each expression.
*September 25, 2011*

**pre-algebra**

If a and b are any real numbers, is the statement a x b = b x a always true? Why or why not?
*August 29, 2011*