# Posts by dylan

Total # Posts: 503

**calculus**

I am learning derivatives and I despise having to use the definition of the derivative. Please check my answer for this particular one! it is different from the one I get by differentiating. The question: f(x) = 2+x / x^3 my answer: -6x^2-2x^2

*April 24, 2011*

**math**

Brown checked out 4 books and 1 videotape at the library. He returned them all 7 days late the library charges late fees at $3.00 per week for a video and $0.15 per day for a book. Write an expression that represents browns change if he paid his late fees with a $10 bill?

*April 17, 2011*

**science**

why are dog fleas more successful parasitesthen bacteria that cause deadly diseases?

*April 13, 2011*

**math**

Mary's group of close friends are going to fifth grade in September. All are going to Belleview Elementary and their homerooms will be room 12, 14, or 16. All of her friends but 4 are going o room 12, all but 4 are going to room 14, and all but 4 are going to room 16. Not ...

*April 10, 2011*

**math**

MathMate attempted to help but did not show how the problem is answered. It only confused the problem. Could someone else please help? Thanks. The denominator of a fraction is 4 more than the numerator. If both the denominator and the numerator are increased by 1, the ...

*March 26, 2011*

**math**

The denominator of a fraction is 4 more than the numerator. If both the denominator and the numerator are increased by 1, the resulting fraction equals 1/2. What is the original fraction? **Need to show all work** Thanks for the help.

*March 26, 2011*

**Chem 112**

2.78

*March 21, 2011*

**chemistry**

How many milliliters of 3.0 M hydrochloric acid are i required to prepare 500 milliliter of 1.0 M Hydrochloric solution

*March 15, 2011*

**Math**

plot 7 on the x axis

*March 15, 2011*

**math**

Please help my equivalent fraction. I am greater than 1/5 and less than 1/2. My denominator is between 2 and 4. What fraction am I? Thanks for the help..

*March 9, 2011*

**chemistry**

A gas occupies 8.2 liters at 2.5 atm. What is the pressure if the volume becomes 7.5 L?

*March 3, 2011*

**chemistry**

A gas occupies 8.2 liters at 2.5 atm. What is the pressure if the volume becomes 7.5 L?

*March 3, 2011*

**chemistry**

A gas occupies 8.2 liters at 2.5 atm. What is the pressure if the volume becomes 7.5 L?

*March 3, 2011*

**ipc**

how much power is used to move a 25 kg mass 8 meters in 15 seconds

*February 28, 2011*

**Math**

90/65=.7222*5=3.6111+5=8.6111 8.1 feet

*February 27, 2011*

**ap chem**

ok, i'm given: Ethylene Glycol C2H6O2 is the main ingredient in antifreeze. density of pure EG: 1.132 g/mL Anti-freeze is 32% by volume EG I have to find: Volume of Eg in 1 L Mass of Eg in 1 L & the Volume of "solvent" in 1 L Can someone help me? and give me some...

*February 27, 2011*

**ap chem**

ok, so i have to find the mass of the HNO3 in 1 L and the mass of the H2O in 1 L. I'm given: HNO3 solution 1.42 g/mL 16M I'm really terrible at this stuff and it should be easy, but I have no idea where to start.

*February 25, 2011*

**ap chem**

ok, sweet. i had most of that set up right. so the mass of HNO3 = 1008 g & the mass of H2O = 412 g?

*February 25, 2011*

**ap chem**

ok, so i have to find the mass of the HNO3 in 1 L and the mass of the H2O in 1 L. I'm given: HNO3 solution 1.42 g/mL 16M I'm really terrible at this stuff and it should be easy, but I have no idea where to start.

*February 25, 2011*

**ap chem**

would you multiply the 93.37 and the 1.071 then? is 100g correct?

*February 24, 2011*

**ap chem**

would it be 89.28 g?

*February 24, 2011*

**ap chem**

I'm supposed to find the mass of NaCl in 1 L & the mass of H20 in 1 L. I'm given NaCl solution. 1% by mass. The Density is 1.071 g/mL. I know the answer for NaCl is 10.71 g, but I don't know where to start to get to this. Could you lead me in the right direction?

*February 24, 2011*

**essay writing**

same here... yall should rethink your answer

*February 3, 2011*

**spelling 2nd grade**

give me a senec with prehistoric

*January 23, 2011*

**geometry**

the area of the first triangle is 22 sq feet. if the scale factor of two similar traingles if 3, what is the area of that second triangle>?

*January 18, 2011*

**Science**

very urgent!!!!!!!!! plzz plzz answer or attempt!

*January 18, 2011*

**Science**

8. The balanced equation P4 (s) + 6H2 (g) --> 4PH3 tells us that 2 mol H2 a. reacts with 1 mol 4 b. produces 4 mol PH3 c. cannot react with phosphorus d. produces 2 mol PH3 e. reacts with 2 mol P4 idk y i cant seem to get the answer from the choices above?

*January 18, 2011*

**math**

1 1/12 = 13/12 =2-13/12 = 24/12-13/12 =11/12 of a cake left over.

*January 18, 2011*

**chemistry**

Yupp, Calcium Hydroxide. Ca is the cation --> calcium OH is the polyatomic anion--> hydroxide (: Hope it helped!

*January 18, 2011*

**algebra**

(6y+1)(6y-1)

*January 18, 2011*

**Chem 11**

4.21

*January 18, 2011*

**Geometry**

Right triangle

*January 18, 2011*

**Visual Basic - Computer Science**

Public Class Form1 Public SparkPlugsString(,) As String = {{"VBAutoPart", "Brand A", "Brand C", "Brand X"}, {"PR214", "MR43T", "RBL8", "14K22"}, {"PR223", "R43", "RJ6"...

*December 19, 2010*

**Visual Basic - Computer Science**

I'm trying to right a program with Multidimensional Arrays. These are the instructions for the program: The Valley Boulevard (VB) Auto Center management is pleased with your progress in developing their system. They require you to develop a new feature for their system. ...

*December 19, 2010*

**chemistry**

using a universal ph paper to test the Ph of purple grape juice is unlikely to be successful why

*December 15, 2010*

**Physics**

Define the focal length of a convex mirror?

*December 14, 2010*

**Math**

x+2=6 and its under a square root thing

*December 11, 2010*

**Math**

3x-6y=12 find the slope, y intercept and general equation

*December 11, 2010*

**Math**

solve using addition or subtration 12x+9y= 14 6x= 7y - 16

*December 11, 2010*

**math**

Mrs.penn has a circular tablecloth with a circumference of 29 feet. Which expression could be used ro find the radius of the tablecloth? f. 29 - 2 pie g. 29/2 pie h. 29/pie j 29 + 2pie

*December 6, 2010*

**Chemistry**

the idea expressed in whims is known as

*December 3, 2010*

**science**

chief or ruler .

*November 30, 2010*

**5th grade**

what is the smallest number of pencils that are needed to put into jars holding 3,6 and 9 leaving no remainder.

*November 23, 2010*

**precal**

the terminal side of an angle in standard position coincides with the line y=x in quadrant I. find tan to the nearest thousandth

*November 17, 2010*

**math**

Answers are: 1. D 2. B 3. C 4. B 5. D(obviously) 100% for Unit 1 Lesson 7 Quick Check for connexus!!!! Hope it helped, love you guys!??

*November 14, 2010*

**Math**

if four friends share equally a 48 ounch bag of popcorn what fraction would each one get?

*November 8, 2010*

**algebra**

x/14+12=3x-8.5

*November 4, 2010*

**algebra**

x/14+12=3x-8.5

*November 4, 2010*

**Algebra**

x/14+12=3x-8.5

*November 4, 2010*

**Math**

Find a number whose square root is 24 more than 5 times the number. How do I set up this problem? Thank you for any help!

*October 23, 2010*

**algebra I**

Find a number whose square root is 24 more than 5 times the number. How do I set up this problem?

*October 23, 2010*

**AP CHEM**

HIO3 + FeI2 + HCl --> FeCl3 + ICl (in acidic solution) Show and label the two balanced half-reactions (oxidation and reduction). Add H2Os, H+s or OH-s as needed.

*October 23, 2010*

**Physics**

What force is required to accelerate an object of 1.484x10^0 kg over a frictionless surface at -2.3580x10^0 m/s2 expressed to three significant figures.

*October 22, 2010*

**Chemistry**

921.4919096 g/mol does this look to be right? or 1 grams 850.49 NF3 is equal to 0.00108519672238 mole does this look better?

*October 22, 2010*

**Chemistry**

How many moles of NF3 are in 850.49 grams of nitrogen triflouride

*October 22, 2010*

**Chemistry**

ok so C = 19x 12.01 = 228.19 H = 97 x 1.001 = 97.097 Cl = 35 x 35.45 = 1240.75 =1566.037 g/mol is this look ok

*October 22, 2010*

**Physics**

A motorcycle with an initial velocity of 7.99x10^0 m/s accelerates for a total of 3.3x10^0 seconds at a rate of 1.51x10^0 m/s2. What is it's velocity, to two significant figures? can anyone show the calculations for this

*October 13, 2010*

**Physics**

For a standard production car, the record for road test acceleration goes to the 1993 Ford RS200 Evolution. This car went from 0 to 2.911x10^1 m/s in 3.279x10^0 seconds. What is the average acceleration, expressed to 3 significant figures?

*October 13, 2010*

**AP Chem**

A student chemist named Hannah Montana set up an electrical conductivity tester similar to that shown on page 141 and conducted an experiment involving two clear, colorless liquids, identified as solution A and solution B. Solution A and Solution B are both 0.050 M. The ...

*October 11, 2010*

**Geography**

How do the shores of Long Island differ from each other. The South Shore and he North Shore

*October 6, 2010*

**social studies**

does anyone know the 4 prehistoric indian groups that lived in indiana?

*October 5, 2010*

**math**

This is dylan i am just learning square root i need this answer for my homework which is do tommorow so please write the answer back to me thanx every1 and please check your answer before ypu post it.Thanx Every1.

*September 23, 2010*

**math**

Each ostrich needs a pen about 20 feet by 10 feet.How many square feet of space will be needed by 11 ostriches.

*September 23, 2010*

**5th grade math**

In the zoo there is penguins and polar bears 120 people visted both of them but only 75 people to photograghs how many people bought souvenior photographs please multiply

*September 21, 2010*

**geography**

What does Pig ears stand for?

*September 21, 2010*

**geometry**

X would be 17.5, as long as the answer isn't required to be a whole number.

*September 20, 2010*

**physics**

need answer fast- running out of time

*September 7, 2010*

**physics**

A truck is stopped at a stoplight. When the light turns green, it accelerates at 2.7 m/s2. At the same instant, a car passes the truck going 18 m/s. Where and when does the truck catch up with the car?

*September 7, 2010*

**Science**

The portion of the nervous system that controls involuntary activities is a subdivision of the ____ nervous system. A. sympathetic B. central C. peripheral D. parasympathetic I think it's either B or C right?

*September 1, 2010*

**Science**

What process describes how a signal travels from one end of a neuron to the other end? A. Hormonal regulation B. Muscle coordination C. Membrane excitability D. Neurotransmitter release I'm pretty sure the answer is C but just want to be positive.

*September 1, 2010*

**medicine**

A patient was experiencing indigestion almost every day. The physician performed an upper GI series, also known as a ____ test. a) bronchographic b) barium enema c) cholangiographic d) barium swallow I've been searching for hours and cant find the answer. Please help!!!

*August 6, 2010*

**How Children learn**

19. C 20. A

*May 13, 2010*

**math HELP**

ur such a homo. oh and your mom wanted to join

*May 6, 2010*

**math HELP**

why don't u want to join

*May 6, 2010*

**8th grade**

thanks wanna join

*May 5, 2010*

**8th grade**

what is a historical fact about independent and dependent events. im having so much trouble finding this answer on the enternet. HELP! thanks

*May 5, 2010*

**trigonometric**

ya drwls is right haha

*May 5, 2010*

**math #2**

Look at the pattern of shaded numbers. use place value to describe how the number change. 501 is shaded,502,503,504,505,506,507,508,509,510,511,512,513 is shaded,514,515,516,517,518,519,520,521,522,523,524,525 is shaded,526,527,528,529,530,531,532,533,534,535,536,537 is shaded...

*April 26, 2010*

**math**

Look at the pattern of shaded numbers. use place value to describe how the number change. 501,502,503,504,505,506,507,508,509 is shaded,510,511,512,513,514,515,516,517 is shaded, 518,519,520,521,523,524,525 is shaded,526,527,528,529,530,531,532,533 is shaded,534,535,536,537,...

*April 26, 2010*

**math**

Look at the pattern of shaded numbers. use place value to describe how the number change.

*April 26, 2010*

**8th grade chemistry**

the answer is c :)

*April 21, 2010*

**Math**

A vase had 4 yellow flowers, 4 red flowers and 8 blue flowers. Donna takes one out, smells it and returns it to the vase. What is the probabilty she picked a red flower? What is the probabilty she picked a blue flower? Is it red 4:16 and blue 8:16?

*April 15, 2010*

**Math**

A die is rolled once. What is the probability of getting number 5?

*April 15, 2010*

**Math**

change the equation 2x+5y=8 into the form of y=ax+b and then substitute for the value of X by ( 0 , 1 , 2 , 3 ) 3 points are enought and line them on a graph.. Note : the second equation has the same way!

*April 13, 2010*

**math**

seven thousands five hundred fourty two.. THATS IT!

*April 12, 2010*

**Math**

Its is (2x+5)^2... That's the correct Factorized answer

*April 12, 2010*

**Math**

Developed form : x^2 -1/2x -7x -7.5 : x^2 -7.5x -7.5

*April 12, 2010*

**math**

Ok now that makes more sense to me. i must have typed it wrong. thank you.

*March 28, 2010*

**math**

It would be more of a drop. But i still done get the formula. did i do the formula right in the first place?

*March 28, 2010*

**math**

Would a drop of 40 Celsius degrees be more or less than a drop of 40 fahrenheit degrees? explain why C = 5/9 (F - 32)40-32=8c F = 9/5 C + 32 40+32=86f

*March 28, 2010*

**6th Grade Grammar**

Its A

*March 17, 2010*

**6th Grade Grammar**

Present Perfect

*March 17, 2010*

**4th grade**

I have a rectangle equally divided into 24 parts I must cut it into 5 pieces and make a new shape. cannot bea rectangle

*March 9, 2010*

**preschool**

wow teach him to talk

*January 30, 2010*

**math**

Calculate the area of each composite figure.round to the nearest square unit, if necessary. a)15mm, 8mm, 10mm 30mm

*January 26, 2010*

**math**

The slopes of the two lines are given. Conclude whether the lines are parallel, perpendicular, or neither. a)m=2/3,m=4/6 b)m=3/4,m=-4/3 c)m=2,m=-2 d)m=1,m=-1 e)m=1/5,m=0.2 f)m=2 1/4, m=-4/9

*January 24, 2010*

**math**

The equation 9c-5f+160=0 describes the relationship between temperature, C, in degrees Celsius, and temperature, F, in degrees Fahrenheit. b)graph this relation.

*January 24, 2010*

**12th grade**

What is answer to 2/3 to second power and how do I calculate

*January 12, 2010*

**Chemistry**

does BaCl2+Pb(NO3)2 form a percipitate

*December 27, 2009*

**math**

what is the slope-intercept of:y=x-1

*November 17, 2009*