# Posts by rocky

Total # Posts: 145

**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?

*March 22, 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.

*March 22, 2017*

**math 1**

t7 = -15 and t 20 =44

*March 15, 2017*

**math 1**

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

*March 15, 2017*

**Math1**

thank you Steve

*March 15, 2017*

**Math1**

I don't understand it . could you work this one for me .

*March 15, 2017*

**Math1 **

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

*March 15, 2017*

**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?

*March 13, 2017*

**math 1**

I don't understand

*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?

*March 13, 2017*

**math 1**

I need some help . I don't understand it.

*March 13, 2017*

**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?

*March 13, 2017*

**Math1**

I need some help . I don't understand it

*March 13, 2017*

**Math1**

This is Direct Variation

*March 13, 2017*

**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?

*March 13, 2017*

**math 1**

thank you, I can say more then thank you.

*March 6, 2017*

**math 1**

(8,-6)

*March 6, 2017*

**math 1**

thank you already did

*March 6, 2017*

**math 1**

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

*March 6, 2017*

**math 1**

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

*March 6, 2017*

**math 1**

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

*February 28, 2017*

**math 1**

are you doing elimination

*February 28, 2017*

**math 1**

I just need to know if it is correct

*February 28, 2017*

**math 1**

72x-32y=24 -72x+27y=9 -5y=-15 y=3 8x-3y=-1 8x-3(3)=-1 8x - 9=-1 8x =8

*February 28, 2017*

**math 1**

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

*February 28, 2017*

**math 1**

82y=-82

*February 28, 2017*

**math 1**

48x+64y=32 -48x+82y=-14 82=-82 y=-1 6x+8y=4 6x+8(-1)=4 6x-8=4 6x=4-8 6x=12 X=2

*February 28, 2017*

**math 1**

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

*February 28, 2017*

**math 1**

6x - 16y =-34 -6x +21y =54 5y=20 y=4 2x-7y =-18 2x -7(4)=-18 2x - 28=-18 2x=10 x=5

*February 28, 2017*

**math 1**

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

*February 28, 2017*

**math 1**

of substitution

*February 27, 2017*

**math 1**

systems of sub.

*February 27, 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.

*February 27, 2017*

**math 1**

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

*February 20, 2017*

**math 1**

x=5 y=2

*February 20, 2017*

**math 1**

system of linear equations by substitution.

*February 20, 2017*

**math 1**

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

*February 20, 2017*

**math 1**

i need some help

*February 20, 2017*

**math 1**

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

*February 20, 2017*

**math 1**

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

*February 20, 2017*

**algebra**

x=4 y=5

*February 20, 2017*

**algebra**

systems of linear equations by substitution. I need help, I am stuck

*February 20, 2017*

**algebra**

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

*February 20, 2017*

**algebra**

basically you are saying it is no solution?

*February 6, 2017*

**algebra**

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

*February 6, 2017*

**algebra I**

-74=k

*February 6, 2017*

**algebra I**

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

*February 6, 2017*

**algebra**

I think it is 42 I don't know

*February 1, 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?

*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.

*February 1, 2017*

**algebra**

that is three

*February 1, 2017*

**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?

*February 1, 2017*

**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 identify the extraneous ...

*June 9, 2016*

**Math**

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

*May 24, 2016*

**english**

English is the language of opportunity.why brother to teach indigenous languages?

*April 25, 2016*

**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.

*April 9, 2016*

**physics**

DOnt Know

*March 25, 2016*

**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?

*November 7, 2015*

**Math**

Wow i was having trouble on it, its my lesson today and i was SOOOO confused XD

*February 25, 2015*

**Math 1**

I have this same question and am stuck plz help

*January 5, 2015*

**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 of the unknown acid.

*November 2, 2014*

**Algebra1**

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

*September 17, 2014*

**math**

12

*May 7, 2014*

**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

*September 18, 2013*

**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 about 30s. ...

*July 9, 2013*

**Art Please check answers**

Miss Sue are this right?

*June 2, 2013*

**Art Please check answers**

Are this right?

*June 2, 2013*

**Art Please check answers**

Are this righ?

*June 2, 2013*

**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 kinetic energy?

*November 5, 2012*

**7th grade math**

-1.4 > or < than 2 3/4

*September 4, 2012*

**math**

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

*March 22, 2012*

**Math Help**

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

*November 18, 2011*

**Learning**

-9-(-1)

*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 are the sources ...

*September 24, 2011*

**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?

*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 and 5g of protein, ...

*September 12, 2011*

**Chemistry**

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

*September 10, 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 recommends that she ...

*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 therapies. ...

*August 28, 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?

*August 28, 2011*

**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.

*August 23, 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 breathing. She drinks a ...

*August 22, 2011*

**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 learn that he consumed...

*August 21, 2011*

**Chemistry**

could u plz give me alittle more help on the fist question.This is the proplem that is holding me back. I'd really appreciate your time and effort to answer this question

*August 15, 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 add 3 teaspoons of ...

*August 15, 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 the same after ...

*August 7, 2011*

**intermediate algebra**

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

*August 3, 2011*

**intermediate algebra**

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

*August 3, 2011*

**intermediate algebra**

can you please help find the solution to this equation. Your help would be greatly appreciated

*August 2, 2011*

**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.

*August 2, 2011*

**intermediate algebra**

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

*August 2, 2011*

**intermediate algebra**

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

*August 2, 2011*

**intermediate algebra**

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

*August 2, 2011*

**intermediate algebra**

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

*August 2, 2011*

**intermediate algebra**

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

*August 2, 2011*