# rocky

Most popular questions and responses by rocky-
## chemistry

what is the percent by mass of NaHCO3, in a solution containing 20 g NaHCO3 dissolved in 600 mL H20

*asked on July 14, 2011* -
## adult education

A firm is assigned the network part 128.171. It selects an 10-bit subnet part. a) Draw the bits for the four octets of the IP address of the first host on the first subnet.

*asked on November 7, 2009* -
## chem

A 0.167-g sample of an unknown compound contains 0.00278 mol of the compound. Elemental analysis of the acid gives the following percentages by mass: 40.00% C; 6.71% H; 53.29% O. 1.)Determine the molecular formula of this acid. 2.)Determine the molar mass

*asked on November 2, 2014* -
## Chemistry

a 40-year-old manger at a prominent legal firm in L.A experiences abdominal pain post lunch. He goes to the restroom a couple of times, but continues to experience pain and cramps. He evevtually decides to get himself examined. While questioning him, you

*asked on August 21, 2011* -
## Chemistry

a sample of gas of unknown pressure occupies 0.766 L at the temperture of 298k the same sample of gas is than tested under known conditions and has the pressure of 32.6kPa and occupies 0.664 L at 303 k. What is the original pressure of gas

*asked on July 13, 2011* -
## chemistry

At 20°C, a solution contains 120 g of NaNO3 in 100 g of water. Is this solution saturated, unsaturated, or supersaturated?

*asked on July 14, 2011* -
## Texas History

Name one main success and one main failure of the Republic of Texas government. Then, tell how these factors contributed to Texas’ annexation by the United States. Anyone know a good example of this question?

*asked on December 1, 2017* -
## Spanish

Can anyone help me? I don't think the translator is doing this correctly. Is this english version translated to spanish correctly? Thanks for any help!! My son Kyle went on vacation to the Grand Canyon. He loved standing at the top seeing how big it really

*asked on June 16, 2019* -
## algebra

Using the equation below as a model, fill in numbers in the place of a and b to create a rational equation that has an extraneous solution. x+a/ax=b/x Part 1. Show all work to solve for x in the equation and check the solution. Part 2. Explain how to

*asked on June 9, 2016* -
## math 1

Wei received $55.35 in interest on the $1230 in her credit union account. If the interest varies directly with the amount deposited , how much would Wei receive for the same amount of time If she had $2000 in the account?

*asked on March 13, 2017* -
## math 1

Karen earns 28.50 for working six hours. If the same amount m she earns varies directly with h the number of hours she works , how much will she earn for working 10 hours?

*asked on March 13, 2017* -
## Physics

Two air-track carts move toward one another on an air track. Cart 1 has a mass of 0.336 kg and a speed of 1.16 m/s. Cart 2 has a mass of 0.634 kg. What speed must cart 2 have if the total momentum of the system is is to be zero? What is the system's

*asked on November 5, 2012* -
## Math1

The number of gallons g of fuel used on a trip varies directly with the number of miles m traveled . If a trip of 270 miles required 12 gallons of fuel, how many gallons are required for a trip of 400 miles?

*asked on March 13, 2017* -
## chemistry

equilibrium CO(g)+2H2(g)CH3OH(g)calculate these concentrations:CO(g) in an equilibrium mixture containing 0.933mol/L H2 and 1.32 mol?l CH3OH.

*asked on July 18, 2011* -
## math 1

A bottle 150 vitamins costs $5.25. If the cost varies directly with the number of vitamins in the bottle, what should, how a bottle with 250 vitamins costs?

*asked on March 13, 2017* -
## algebra

Factor the expression 25x^2-60xy+36y^2 into a product of binomials.

*asked on July 24, 2011* -
## Math1

Bacteria can multiply at alarming rate when each bacteria splits into two new cells , thus doubling. If we start with only one bacteria which can double every hour , how many bacteria will have by the end of one day?

*asked on March 22, 2017* -
## Geomatry

Which Solid can be defined as the regular polyhedron (a solid with all faces identical regular polygons) with the greatest number of faces? Please help thank you http://en.wikipedia.org/wiki/Regular_polyhedra There are nine regular polyhedra. Choose the

*asked on March 31, 2007* -
## physics

A 58 kg skier has a speed of 9.5 m/s at point A. She then encounters a 1.75 m deep dip in the snow's surface that has a circular cross section with a radius of curvature of 12 m.

*asked on April 9, 2016* -
## intermediate algebra

Rowing. Abby rows 10km. upstream and 10km. back in a total time of three hours. The speed of the river is 5km./h. Find Abby's speed in still water.

*asked on August 2, 2011* -
## intermediate algebra

factor out the greatest common factor from the expression 24xyz^2+20x^2yz-4x^2z^2

*asked on July 26, 2011* -
## Algebra

The average mark on a test in an algebra class is 80. If the two lowest scores of 34 and 48 are not counted, the remaining scores would average 83. How many students are in the algebra class?

*asked on October 28, 2010* -
## @Ms. Sue

Why does everyone be rude and/or salty to you? You have helped me a lot as a student, and I am very thankful for it.

*asked on December 1, 2017* -
## Chemistry

differentiate alkenes and alkynes, cis isomers and trans isomers. Describe how cis-trans isomers are used for night vision

*asked on September 10, 2011* -
## AP US History

Analyze the extent to which TWO of the following influenced the development of democracy between 1820 and 1840. -Jacksonian economic policy -changes in electoral politics -Second Great Awakening -Westward movement

*asked on April 10, 2011* -
## algebra

how do I simplify -2xyz^3/5x^2z^2 times 10xy/x^3

*asked on October 27, 2010* -
## math 1

c-3d=27 4d+10c=120

*asked on February 20, 2017* -
## intermediate algebra

use polynomial long division to divide 25x^3+40x^2+25x+10 by -5x^2-3x-2

*asked on August 2, 2011* -
## algebra

factor the expression a^2-6ab+9b^2 into a product of binomials

*asked on July 25, 2011* -
## algebra

Andrew factored the expression 20x^3-12x^2+8x as 4x(5x^2-12x^2+8x). But when Melissa applied the distributive law and multiplied out 4x(5x^2-12x^2+8x),she got 20x^3-48x^3+32x^2; thus, Andrew's solution does not appear to check. Why is that? Please help

*asked on July 24, 2011* -
## algebra

The lengths of the sides of a triangle are x,2x+1,5x+4inches. If the perimeter is 53inches, what is the value of x?

*asked on February 1, 2017* -
## Math

20'ladder placed 5'from base of house. How high up ladder reach?

*asked on May 24, 2016* -
## PHYSICS

An airplane is flying straight and level at a speed vo = 150 mph and with a constant time rate of increase of speed v' = 20 ft/s^2, when it starts to climb along a circular path with a radius of curvature p = 2000 ft. The airplane maintains v' constant for

*asked on July 9, 2013* -
## Math Help

-9-(-1) please help me solve with explanation

*asked on November 18, 2011* -
## Chemistry

What are the various uses of radioactivity in healthcare? What are the future trends in healthcare with respect to the use of radioactivitiy?

*asked on August 28, 2011* -
## Chemistry

A robust first grader goes for swimming lessons three times a week,and he enjoys it thoroughly.During the first week of December, he develops an upper respiratory infection, starts coughing continuosly, and has a high fever of 39ºC. His condition remains

*asked on August 7, 2011* -
## intermediate algebra

Solve using the elimination method. Show all work. If the system has no solution or an infinite number of solutions, state this. 3x+7y=77 -2x+7y=42

*asked on July 30, 2011* -
## algebra

Essay. show all work. A gardener wants to create a triangluar garden in the shape of a right triangle with shortest legth x-3y ft. and the middle length side x+6y ft. What ia an algebraic expression for the area of the garden? be sure to multiply this out

*asked on July 22, 2011* -
## Math 1

48x^3 - 128x^2 -56x -16 please help. Poloynomials

*asked on April 24, 2017* -
## Math1

Find a bank account balance if the account starts with $100 , has an annual rate of 4% , and the money left in the account for 12Yrs. This is a Exponential growth word problem.

*asked on March 22, 2017* -
## math 1

you have 28 coins that are all nickles and dimes. the value of the coins is $2.05. Find the amount of nickles and dimes that you have.

*asked on February 27, 2017* -
## algebra

system of equations c-3d=27 4d+10c=120

*asked on February 20, 2017* -
## algebra

-38=-4k-8+4k-28

*asked on February 6, 2017* -
## maths

two sprinters runs the same race of 100m. One runs at a speed of 10m/s and the other runs at the speed of 8m/s. by what time will the first sprinter beat the other sprinter?

*asked on November 7, 2015* -
## math

Which describes this type of series? -20 - 18 - 15 - 11 … I think it is both arithmetic and geometric

*asked on March 22, 2012* -
## Chemistry

state three examples each of acids, bases,and salts commonly used in thera peutic processes. From the examples you state, select one acid, one base and one salt and describe how and where they are useed in therapeutic processes.

*asked on August 23, 2011* -
## Chemistry

a freshmann is currently enjoying the arts studio program she is pursuing at a well know university. In her free time she likes to skate,take salsa dance lessons, and cook. She particularly enjoys and decides to pickle olives to the rescipe, she needs to

*asked on August 15, 2011* -
## intermediate algebra

rewrite with positive exponents. Assume that even roots are nonnegative quanities and that all denominators are nonzero. [3/ua^2)^-4

*asked on August 3, 2011* -
## intermediate algebraDivide

Using polynomial long division to divide. 25x^3+40x^2-25x+10 by -5x^2-3x-2

*asked on August 1, 2011* -
## intermediate algebra

use thr discriminant to determine wheather the following equations have solutions that are two different rational solutions;two different irrational solutions; or two imaginary solutions.8x^2+7x+3=0

*asked on August 1, 2011* -
## intermediate algebra

Solve using the elimination method. Show your work. If the system has no solution or an infinite number of solutions,state this. 3x+7y=77 -2x+7y=42

*asked on August 1, 2011* -
## intermediate algebra

Solve uing the subtitution method. Show your work. If the system has no solution or an infinite number of solutions, stat this,3x-15y=-12 3x+24y=-12

*asked on July 30, 2011* -
## intermediate algebra

compleletly factor the following expression 9y^2-16z^2

*asked on July 26, 2011* -
## algebra

factor completely. remember to look first for a common factor. if a polynomial is prime,state this -4t^2+64

*asked on July 24, 2011* -
## algebra

factorcompletely. if polynomial is prime, state this 9+8t^2-18t

*asked on July 24, 2011* -
## algebra

factor by grouping if possible and check 5x^3+4x^2-10x-8

*asked on July 24, 2011* -
## Algebra

Write a direct algebraic proof to show that if a/b=c/d, then a+c=b+d

*asked on April 3, 2011* -
## Math1

195x^5 + 168x^4 - 28x^3 - 24x^2 This is factoring I have looked at everything.

*asked on April 24, 2017* -
## math 1

6x+8y=4 8x-3y=19

*asked on February 28, 2017* -
## math 1

3x - 8y = -17 2x -7y = -18

*asked on February 28, 2017* -
## Algebra1

-3|2x+6|=-12 How to solve for x, I relley need help please!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

*asked on September 17, 2014* -
## Chemistry

Discuss in detail, the role played by DNA andRNA in genetic diseases. what are the breakthroughs, if any, in the treatment/management of genectic diseases?

*asked on September 12, 2011* -
## Chemistry

a girl is celebrating her 7th birthday. each guest is served one large slice of choclate cake, a hamburger, french fries, and some oranges. identify the food groups mentioned above. if one slice of chocolate cake contains 35g of carbohydrate, 15g of fat

*asked on September 12, 2011* -
## intermediate algebra

Express in terms of i. 2 divided by sqrt.,-36

*asked on August 2, 2011* -
## intermediate algebra

Subtract. (5x^6+9x^4-2x^3-3)-(8x^6-8x^5+x^4-4)

*asked on August 2, 2011* -
## intermediate algebra

factor out the greatest common factor from the expression 6x^3yz^4-3x^2y^3z^4-18^4y^2z^3

*asked on July 26, 2011* -
## algebra

factor out the greatest common factor from the expression. 18x^7-14x^2

*asked on July 25, 2011* -
## algebra

The area of a rectangular athletic field is represented by the expression 81y^2-16z^2 square meters. Write an algebraic expression to represent one possible set of dimensions(in the sense " length times width") of the athletic field. Include correct units

*asked on July 24, 2011* -
## Algebra

1/5(a-2)-2/5(a-3)>2a-1/3(4+5a)

*asked on October 28, 2010* -
## Math

The mean height is 5 ft 4 in. How many students are in the class?

*asked on May 11, 2009* -
## Biology

This is my question from my Biology paper. List which organs and tissues come from the mesoderm primary cell layer. Thanks

*asked on October 16, 2008* -
## Puzzle Solving

RXhjaXRlbWVudCBhd2FpdHMuIE JpZyB0aGluZ3MgYXJlIG9uIHRo ZSB3YXkuDQpodHRwczovL2Rpc2 NvcmQuZ2cvWUZtcERaaA== Please help me to solve the given puzzle. the sequence and no. of words in a given line is same as in the question.

*asked on September 2, 2017* -
## algebra

the sum of a 2 digit number is 6 when you reverse its digits you increase the number by 36 my answer is 3 is that correct

*asked on May 27, 2017* -
## algerbra

The school is selling tickets the first day the school sold 11 senior tickets and 4 child tickets a total of $93. the school sold $71 worth of tickets the second day 9 senior tickets and 2 child tickets find the price of a senior ticket and the price of a

*asked on May 27, 2017* -
## Math 1

392n^4 + 168n^3 + 168n^2 +72n

*asked on April 24, 2017* -
## Math 1

80x^4 - 60x^3 - 60x^2 - 45x

*asked on April 24, 2017* -
## math 1

c) 36,31,25,21,... t7 and t20 arithmetic and geo metric

*asked on March 15, 2017* -
## Math1

use formula from 2c to find the values of t and t 7 20 c)36,31,25,21,...

*asked on March 15, 2017* -
## math 1

y = -3x + 18 3x + 4y =0

*asked on March 6, 2017* -
## math 1

x + y = 8 y = 1/3x + 4

*asked on March 6, 2017* -
## math 1

6x + 8y=4 8x -3y=19 I did elimination. 82y=-82

*asked on February 28, 2017* -
## math 1

9x-4y=-3 8x-3y=-1

*asked on February 28, 2017* -
## math 1

4x+y=8 2x-3y=1

*asked on February 20, 2017* -
## math 1

4x+y=2 -2x-3y=1

*asked on February 20, 2017* -
## math 1

system of linear equations of substitution. a=2/b-3 a=2b-8

*asked on February 20, 2017* -
## algebra I

Please help with this problem -38=-4k-8+4k-28 -38=k-8-28 -38=k-36 -36 -3-74=k

*asked on February 6, 2017* -
## algebra

David weighs 20lbs.more than katy ,while Jonathon weighs 120lbs. less than three times katy's weight. If David and Jonathon weigh the same amont , how mush does katy weigh? How much much does David and Jonathon weigh?

*asked on February 1, 2017* -
## algebra

Four times a number plus five times the number is the same as ten more then eight times the number. Find the number.

*asked on February 1, 2017* -
## Pre-Calculus

I've tried to simplify this a million different ways, but I can't seem to get the right answer. Please help. ((1/(x+h)^3)-(1/x^3))/8h

*asked on September 18, 2013* -
## Learning

-9-(-1)

*asked on November 18, 2011* -
## Chemistry

a middle-aged man has been diagnosed as being at high risk group of developing Coronary Artery Disease. Distinguish between the good and bad forms of this sterol. 'Explain the function of the good form of this sterol in the body. List the food groups that

*asked on September 24, 2011* -
## Chemistry

the managing director of a well-known company on wall street thrives on a diet of fruit jam, bread, pasta, and coffee. She exercises intermittently. One day she decides to to her primary healthcare provider for a routine checkup. The healthcare provider

*asked on September 10, 2011* -
## Chemistry

At a prominent state hospital, a 45 year old woman is recieving a combined modality' treatment for the intial stage of breast cancer. State the two aspects included in this treatment. State the methods by which a radiation oncologist can administer these

*asked on August 28, 2011* -
## Chemistry

A 55 year old woman visits a popular eatery for lunch. She orders a cheese pizza and bacon pizza with extra cheese and has about 3 large glasses of cola (ph value 3). On the way back home she experiences heartburn and abdominal pain, and has diffigulty

*asked on August 22, 2011* -
## intermediate algebra

SOLVE BY FACTORING 2a^2-3a=-5

*asked on August 3, 2011* -
## intermediate algebra

Given the quadraticf(x)=x^2-14x+49, find a value of x such thatf(x)=36

*asked on August 2, 2011* -
## intermediate algebra

Express in terms of i. 2sq.rt.divided by-36

*asked on August 2, 2011* -
## intermediate algebra

rewrite with positive exponents. Assume that even roots are of nonnegative quantities and that all denominators are nonzero. [3}^-4 --- ua^2}

*asked on July 30, 2011* -
## intermediate algebra

if a stone is tossed from the top of a 310 meter building, the height of the stone as a function of time is given by h(t)=-9.8t^2-10t+310. where t is in seconds, and height is in meters. After how many seconds will the stone hit the ground? Round to the

*asked on July 28, 2011* -
## intermediate algebra

In solving the equation (x-1)(x+2)=30. Eric stated that the solution would be x-1=30¨T¡úx=31 or(x-2)¨T30¨T¡úx=32 However, at least on of these solutions fails to work when subsitituted back into the orignal equation. Why is that? Please help Eric to

*asked on July 28, 2011*

## Pages

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