Sunday

February 19, 2017
Total # Posts: 1,299

**Math**

Using suffix notation and the summation convention, prove that u.del*u= w x u+ del(1/2q^2) where w= del x u and q= /u/?

*February 4, 2017*

**Math (Tensor Notation)**

Using suffix notation and the summation convention prove that u.del(u)= w x u + del(1/2q^2) where w= del x u and q=/u/

*February 4, 2017*

**stats**

Industry standards suggest that 18% of new vehicles require warranty service within the first year. Jones Nissan, sold 11 Nissans yesterday What is the probability that less than three of these vehicles require warranty service?

*February 1, 2017*

**Math**

I need help solving equation it says to round to the neatest hundredth if needed the problem is 9- 6(1-5a)=-26

*January 5, 2017*

**pre calc**

-1less or equal to x less then 4, state raltion represented by y=[2x]+1 by listing ordered pairs

*December 14, 2016*

**Calculus**

the sum of three positive numbers is 40. The first plus three times the second plus four times the third add up to 80. Select the numbers so that the product of all three is as large as possible.

*December 12, 2016*

**Physics**

A tension spring opposes being stretched, but offers no resistance to being compressed (think of a slinky!). A tension spring, with an equilibrium length of 1.25 m, is suspended by one end from a ceiling at a height of 2.5 m above the ground; a mass of 100 g is attached to the...

*November 26, 2016*

**calculus**

A rectangular poster is to have 50 squared inches for printed matter. It is to have a 1? inch. margin on each side and a 2? inch. margin at the top and bottom. Find the dimensions of the poster so that the amount of paper used is minimized. Horizonatal width= Vertical Height=

*November 21, 2016*

**math**

A rectangular poster is to have 50 squared inches for printed matter. It is to have a 1? inch. margin on each side and a 2? inch. margin at the top and bottom. Find the dimensions of the poster so that the amount of paper used is minimized. Horizonatal width= Vertical Height=

*November 21, 2016*

**Physics**

A car is proceeding at a speed of 14.0 m/s when it collides with a stationary car in front. During the collision, the fist car moves a distance of 0.350 m as it comes to a stop. The driver is wearing her seat belt, so she remains in her seat during the collision. The driver&#...

*November 15, 2016*

**Science**

Help pzzzzzz Sound in an empty room can be very loud,with many echoes.Describe three ways to make the room quieter?

*November 15, 2016*

**Algebra 2**

By graphing the system of constraints, find the values of x and y that maximize the objective function. 2x+y<=300 x+y<=200 x=>0 y=>0 maximum for p=x+2y

*November 8, 2016*

**maa central**

a set is composed of marbles with different colors, namely: 5 blue marbles, 3 red marbles and 2 gren marbles.What is the fractional form of blue marbles?

*November 2, 2016*

**Math**

If there are 35 kids in a class and 22 are girls what is the ratio of girls to boys in the class

*October 22, 2016*

**Math**

3. (2.56 x 10^6) x (3.56 x 10^2) = a. 9.1136 x 10^12 b. 91.136 x 10^8 c. 9.1136 x 10^8 d. 91.136 x 10^12 4. In a recent year, the population of California was about 2.52 x 10^7 people. Its land area is about 4.05 x 10^5 km2. What was the average number of people per square ...

*October 21, 2016*

**math**

Find the angle of depression from the top of a lighthouse 191 feet above the water level to the water line of a ship 4 miles offshore.

*October 19, 2016*

**chemistry**

Gold has a latent heat fusion of 64.5 J/g. How much energy is required to melt 20.0 g of gold?

*October 18, 2016*

**chemistry**

Ethyl alcohol has a heat of vaporization of 850. J/g. What mass of ethyl alcohol can be boiled using 15000 J of energy?

*October 18, 2016*

**chemistry**

A student melts 50.0 grams of ice using 16650 J of energy. What is the heat of fusion of ice?

*October 18, 2016*

**American History**

Hello there! I believe the answer is, B! Hope I helped, join me on Brainly(dot)com

*October 13, 2016*

**physics (super hard)**

a carnival ride is designed with seats that carry two people weighing 910.0 N each. the seats itself weights 630 N.each seat is connected to central spindle by one chain and rotates on a radios of 6.07 meters. the ride is designed to rotate fast enough that the seats swing out...

*October 9, 2016*

**physics**

a grandfather clock is designed to have a pendulum which swings a mass at the end of the chain in a horizontal circular motion. the pendulum is designed to swing 7 degrees off of the vertical. the chain is 1.50 meters long and the maximum tension in the chain is 12.0 N. ...

*October 9, 2016*

**physics**

an 85kg concrete block rests on a flat surface with coefficient of static friction us=0.42. find the maximum force that can pull on the block with, angle of 38 degrees above the horizontal without moving the block? please help and show work

*October 9, 2016*

**physics**

helpppp

*October 9, 2016*

**physics**

determine the minimum radios of a highway curve which has banking angle of 5.74% over which vehicles will travel at 110km/h. assume that there is no friction between the road and the tires. calculate the radios?

*October 9, 2016*

**physical**

=16*15 = 240

*October 8, 2016*

**math**

Five years after purchase, a machine has a value of $300. The depreciation rate is 26% per year. Calculate the value of the machine when it was bought five years ago.?

*October 6, 2016*

**math**

One sign blinks every 9 seconds. The other sign blinks every 15 seconds. In how many seconds will they blink together again

*September 29, 2016*

**Math**

The minute hand of a colck is 10cm long.How far does the minute hand move in 1 hour?

*September 18, 2016*

**Algebra Word promblems**

Use linear calculator

*September 7, 2016*

**math**

Use an integer to represent the change in the airplane's height. An airplane descends 5,000 feet.

*August 28, 2016*

**math**

use an integer to represent the change in the airplanes height.an airplane descends 5,000 feet.

*August 28, 2016*

**math**

The first one is C. Im pretty sure.

*May 26, 2016*

**Math**

What is the perimeter in meters of a rectangle that is 13 meters long and 10 meters wide

*May 18, 2016*

**pysics**

550 g of water (cw = 4186 J/kg.K) at 75°C is poured into an 855 g aluminum (cw =900 J/kg.K) container with an initial temperature of 11°C. What is the final temperature of the system, assuming no heat is exchanged with the surroundings? Select one: a. 75 °C b. 59 &...

*May 17, 2016*

**Building Traded**

On a print with a scale of 1/2=1FOOT HOW much would a 20 ft hallway be in inches?

*May 11, 2016*

**Statistics**

Listed below are body temperatures for four subjects measured at two different times in a day. Body Temperature (°𝐹) 𝑎𝑡 6 𝑎𝑚: 98.0,97.0,98.6,97.4 Body Temperature (°𝐹) 𝑎𝑡 6 𝑝𝑚: 98.0,97.6,98...

*April 26, 2016*

**Stastics**

The UMUC bookstore states the average textbook costs $119. A randomly selected sample of 26 new textbooks at the UMUC bookstore had a mean price of $123.45 and sample standard deviation of $15.23. Use a 0.05 significance level to test the claim that the mean price of textbooks...

*April 26, 2016*

**Math**

If an oval is 225 yards how many feet of fence go around it fence is sold by foot how o I figure it out

*April 22, 2016*

**Language arts unit 3 lesson 5 second read**

Jesus Christ you guys sure are thick.. Do your work next time!

*April 11, 2016*

**Math**

How many apples will it take to get 27kg 8 divided by ? equals 27kg

*March 30, 2016*

**Physics**

A man completes 31 lengths of a 50 metre pool with an average speed of 0.9 km/h. What is the magnitude of his average velocity vector in Standard SI units?

*March 30, 2016*

**Math**

What is the rate of the current if a canoe travels 22mph

*March 21, 2016*

**Chemistry**

Using your knowledge of chemical migration, outline the two most possible chemical migration pathways for non-polar C9H12 that has been spilled onto an open field on a warm spring day.

*March 4, 2016*

**Physical Education**

Definitely C.

*March 3, 2016*

**Math**

In the questions below P(x,y) means “x and y are real numbers such that x + 2y = 5”. a) Determine whether the statement ∃x∀yP(x,y) is true. b) Negate the statement ∃x∀yP(x,y).

*March 3, 2016*

**math**

if don gecewicz invested $6000 at 8% interest compounded quarterly, find the amount after 7 years

*March 1, 2016*

**Grade 8 Art**

that is all right got 100%

*February 24, 2016*

**Physics**

The figure shows an arrangement in which four disks are suspended by cords. The longer, top cord loops over a frictionless pulley and pulls with a force of magnitude 93.4 N on the wall to which it is attached. The tensions in the shorter cords are T1 = 61.4 N, T2 = 41.5 N, and...

*February 23, 2016*

**Math**

You live 2 3/4 miles from school. In the morning, you walk 1/3 mile directly toward school to the bus stop. Later, when you get off the bus, you walk home the same distance. How many miles do you ride to and from school each day?

*February 18, 2016*

**Health**

Mac N is right! i got a 9/10 but only cuz i put down the wrong answer for

*February 18, 2016*

**Math**

Use the distributive property to solve the equation 8+1/7x=9.

*February 17, 2016*

**physics**

A piece of luggage is being loaded onto an airplane by way of an inclined conveyor belt. The bag, which has a mass of 15.0 kg, travels 4.50 m up the conveyor belt at a constant speed without slipping. If the conveyor belt is inclined at a 30.0° angle, calculate the work ...

*February 16, 2016*

**Math plz help someone.**

rosa quilts a square rug that has an area of 400 square inches. what is the length on each side of the rug? A. 14 B.16 C.18 D.20

*February 9, 2016*

**math**

Elaine is making a model of a house that she designed. She wants to put wood molding around two rooms in the model. She measures and finds that she needs feet of molding for one room and feet of molding for the other room. She has feet of molding

*February 2, 2016*

**Chemistry**

Would you expect H 2 SO 3 to be oxidized to H 2 SO 4 in our natural environment? Please explain using the molecules in our environment and the concept of oxidation states.

*January 30, 2016*

**maths**

y=3ln5t/2cos2t

*January 23, 2016*

**Math**

Kenny wants to invest $250 every three months at 5.2%/a compounded quarterly. He would like to have at least $6500 at the end of his investment. How long will he need to make a regular payments? *PLEASE SHOW WORK*

*January 17, 2016*

**Math**

What are the correct answers??

*January 12, 2016*

**math**

when 4 times a number n is decreased by 3 its at most 21

*January 11, 2016*

**Health**

{1} which is the best example of a win-win situation. A. One side gets what it wants.... B. Both sides get what they want but one side get more.... C equal need are met for both sides....D neither side get what it wants. I think C is the answer. {2} A person understands how ...

*January 11, 2016*

**Business**

Tina borrowed some money at 6% simple interest and paid it back exactly seven years later by making a single payment of $4544. How much did she borrow in the first place?

*January 10, 2016*

**Math**

No I want to know the answer cuz I don't know it😔😓👍

*January 4, 2016*

**Math**

What is {23%,0.21,1/4,1/5} from least to greatest I need the answer today please thank you

*January 4, 2016*

**Biology :)**

oxygen in the solution will naturally diffuse into the cell.

*December 31, 2015*

**Math**

If a 14-ft ladder leans against a building, with an angle of elevation of 70°, how far up the building will the ladder reach? I believe this requires law of cosines but otherwise I am lost.

*December 11, 2015*

**physics**

That is wrong

*December 9, 2015*

**Trigonometry**

Wait, I think I figured it out. Does p=40 a=20 c=80 sound right?

*December 4, 2015*

**Trigonometry**

I must be doing something wrong because I keep coming out to big fractions with variables left over. I need another hint here. Am I supposed to have fractions in my answers?

*December 4, 2015*

**Trigonometry**

Added info: I know that I need a system of three equations to solve for my three unknowns, I just can't figure out those equations. I really need help!

*December 4, 2015*

**Trigonometry**

Peanuts cost $3 per pound, almonds $4 per pound, and cashews $8 per pound. How many pounds of each should be mixed to produce 140 pounds of a nut assortment that cost $6 per pound, in which there are twice as many peanuts as almonds?

*December 4, 2015*

**Algebra**

The sum of two numbers is 53. If twice the 1st number minus 3 times the second number is 26, find both numbers.

*December 1, 2015*

**Math - Statistics**

A six-sided die is rolled 36 times. What is the probability that an odd number is rolled at most 15 times? What is the probability that an odd number is rolled exactly 15 times? Use the Normal Approximation to a Binomial.

*November 30, 2015*

**Social Studies**

Thank you!! I really needed this thanks to whoever posted the questions and the answers.

*November 30, 2015*

**Chemistry**

In the electrolysis of water 75.0 cm3 of oxygen gas are produced.How many cm3 of hydrogen are produced ?

*November 23, 2015*

**math**

I think this is what you should put Abby if you want a good grade An exponential has the variable in the exponent, causing the y to grow or decay increasingly quickly or increasing slowly Real world example banks use interest, over months or years...each time the interest is ...

*November 22, 2015*

**Algebra**

The second of three numbers is three times the first. The third is 5 more than the second. if the second is decreased by twice the third number, the result is five? x 3x 3x-2(3X)=5 x= 3/5 ?

*November 22, 2015*

**Math**

the answer is 9.50 - 7.18 _______ 2.32

*November 18, 2015*

**Math**

yes this is how To get the solution, we are looking for, we need to point out what we know. 1. We assume, that the number 260 is 100% - because it's the output value of the task. 2. We assume, that x is the value we are looking for. 3. If 260 is 100%, so we can write it ...

*November 18, 2015*

**Chemistry**

hope this helps 1 OH- plus H+ = HOH or H2O One mole of OH- combines with one mole of H+ to make one mole of water. therefore .50 moles of OH- will combine with .50 moles of H+ to make .50 moles of H2O and the solution will be neutral with a pH of 7. 2. Balance the equation ...

*November 18, 2015*

**Math**

i had to help my younger sis with this answer not even ten mins ago.

*November 18, 2015*

**Math**

Circle the letter of the answear in which 503,000,000 is written correctly in scientific notation.(superscript -7, superscript 6,and superscript 8 1)5.03 x 10-7 2)503 x 106 3)5.03 x 108 4)503 million I got number 3 for the answear. And you get the prize. 5.03 x 108 is correct...

*November 18, 2015*

**Math**

I would think that the answer would be 7000 let me know if you don't think this is the answer please?.!

*November 18, 2015*

**English**

it would be A

*November 17, 2015*

**English**

The PAST PROGRESSIVE TENSE indicates continuing action, something that was happening, going on, at some point in the past. This tense is formed with the helping "to be" verb, in the past tense, plus the present participle of the verb (with an -ing ending): I was ...

*November 17, 2015*

**Math**

1=45 feet of ribbon 2 6 tons actually equals 12000 pounds and then you would - that from 7,860 and you would get 4,140 pounds is that what you are looking for?

*November 17, 2015*

**Math**

got anymore questions

*November 17, 2015*

**Math**

Welcome anytime!

*November 17, 2015*

**Math**

5 acres of land in each. you can keep asking me questions you know.

*November 17, 2015*

**Math**

I would go with reading because it takes up the longest time.

*November 17, 2015*

**health**

Identical twins often have similar interests even if they were not raised together. This shows how ________ influences personality development a) modeling b) a peer group c) environment d) heredity d would someone check this answer.

*November 17, 2015*

**Math**

then 13 cup and 3 feet.

*November 17, 2015*

**Math**

Leslie needs 324 inches of fringe to put around the edge of a tablecloth. The fringe comes in lengths of 10 yards. If Leslie buys 1 package of fringe, how many feet of fringe will she have left over? she would have 1 yard left over 2. A jar contains 26 fluid ounces of ...

*November 17, 2015*

**health**

A person who is afraid of heights likely suffers from ( select all that apply ) a)anxiety b) a phobia c) obsessive-compulsive disorder d) an impulse control disorder Would Someone Please Help Me With The answer I Know One Is Phobia But I Don't Know The Other Would Someone ...

*November 17, 2015*

**Social Studies (Ms. Sue) Please Proofread**

What are the answers I need them badd

*November 17, 2015*

**geography**

Hey Matthew. It's me Nick. Anyways, the cold war probably took place around eastern and western europe. I think.:)

*November 16, 2015*

**Critical thinking - Reed?**

Reed- (x) can also be argued as not acceptable.

*November 5, 2015*

**Critical thinking - Reed?**

Cookey - It is by observation. Because you have seen humans make mistakes before.

*November 5, 2015*