Wednesday

April 16, 2014

April 16, 2014

Total # Posts: 297

**algebra**

You're saying that you are solving for z then. Are you trying to divide the 2xy+6/3y-4z?

**Chemistry**

The mass of the earth is known to be about 5.98 X10^24kg assume that it is approx. spherical with an average diameter of 1.276X10^7 METERS. from these data calculate the average density of the earth(g/cm^3) could the earth be made mostly of water (density=1.00g/cm^3), abundant...

**Math**

you need values to plug in for the variable "n". such as 1,2,....

**Chemistry**

number one contains 4 significant figures.

**Chemistry**

2,3,4

**Calculating Averages?**

i got 56.2amu but it was wrong. i don't know how to find the average amu?

**Calculating Averages?**

A certain element has four isotopes. 5.85% of has a mass of 53.93961 . 91.8% of has a mass of 55.934939 . 2.12% of has a mass of 56.93539 . 0.282% of has a mass of 57.93328 . What is the average atomic mass of element ? Express your answer numerically to three significant figu...

**trig**

find the next two positive and negative angles coterminal with the quadrantal angle. 90 degrees. would the answer be..... would it be 450, 810?????? and -630, -270 ????

**Trig**

oh okay thanks! i wanted to put a negative.

**Trig**

cos270degrees -5cos180degrees (0/1)-5(-1/1) 0-5(-1) does it equal -5 or +5?

**Chemistry**

Density= Mass/vollume Density= 25.75g/25.00ml density =1.030g/ml

**Trig**

How do you write the answer in __degree___' it wants it written like that... would it be 22degrees30' or 22degrees25'

**physics**

A car starts from rest and accelerates for 6.1 s with an acceleration of 3.1 m/s2. How far does it travel? Answer in units of m.

**math**

what numbers would you use to estimate the sum of 47 and 21?

**math**

dans cette figure on compte 8 triangle.Ã‰cris le nom de chacun d'eux.

**Chemistry**

The boiling point of another member of this homologous series was found to be 309 K. What is the likely molecular formula for this compound? How many carbon atoms would you expect this new compound to have if its boiling point is between that of a four-carbon alkane and that o...

**pre calc**

Find the critical number of the function. g(t) = | 6t - 9 | t =

**science**

what is the food web!!!!!!!!!!!!!

**science**

what is the food web for the checkerspot butterfly

**geometry**

find the area of a trapezoid whose diagonals are each 30 and whose height is 18.

**maths pre ap**

Krispy Krunch cereal is 49% sugar. about how many ounces of sugar are in a 16 oz box of Krispy Krunch?

**MATH EMERGENCY**

Ok. That kind of makes sense.

**MATH EMERGENCY**

I still dont get it:\ Is C the y-intercept? or B? How do I know which one is greater or less? This is mind twisting, i dont get it

**MATH EMERGENCY**

Given Equation AX + BY + C = 0, which following conditions would be true for graph of line to have a negative slope and a postive y-intercept? A. A>0, B>0, C>0 B. A>0, B<0, C>0 C. A>0, B>0, C<0 D. A>0, B<0, C<0 I cant figure this out!

**ENGLISH**

ive done ten sentences, five are verb and five are adjective, plese check. 1. Lily bought a pink cat mask for the halloween party. 2. Anna was covering her scar with makeup as she didn't want anyone to make fun of it. 3. Tory dressed up in disguise to scare his little sis...

**ENGLISH**

Oh thank you. sentence number 4 needs to be longer, atleast ten words? how do i do that?

**ENGLISH**

Begin five sentences with the synonym of yellow. 1.Bumblebees collect nectar from flowers to create honey. 2.Daisies were Sally's favourite kinds of flowers as they always seemed to be happy and smiling. 3.Lemon was Andrew's favourtie gum flavour, as he likes sour. 4.S...

**ENGLISH**

write 5 sentnces using synomnyns of hide as 5 description and 5 verb. please help, atleast one sentence give to me using one description synonym of hide and one verb synonym of hide all in one sentence.

**englsh**

write 5 sentnces using synomnyns of hide as an adverb and adjective. 1. A thief dressed in a dark black outfit and a black mask came to the bank account to steal. i dont know how to do this sentence. Mask is an synomyn of hide. i think i have used it as adjective. but what adv...

**math**

nevermind i got it thanks anyway!

**math**

you are going to end up hating me i am really bad at dimensions so please bear with me. a dorm room your sister is considering seems small.the room is rectangular and has a perimeter of 42 feet. the room is 4 feet longer than its width. what are the dimensions of the room?

**math**

thank you so very much you are awesome i wish you were my math teacher!

**math**

yes it certainly is

**math**

im referring to the deminsions of a rectangle with a triangle with a hypotneuse of 5m in the top right corner

**math**

i have the deminsions of the rectangle but i need to know how to get it , the deminsions are 8m by 3m

**math**

the hypotneuse is 5 meters so how could i figure the dimensions of the rectangle out?

**math**

the perimeter of a rectangle is 22 meters, and the perimeter of the triangle is 12 meters. find the dimensions of the rectangle?

**algebra**

3x+4y

**Math**

i honestly think it is c. its the only one that makes sense.

**algebra**

y = 5x+40

**5th math **

1,000

**Trigonometary**

I'm using the sin formula. I've got w over 1.2 and I'm not sure whether I should multiply it out by 1.2 or by w? The formula looks like this sin20 = w/1.2

**Math**

I have a fraction x/1.2 If i multiply this fraction by x will I end up with the denominator on its own of 1.2x?

**economics**

I would think it would have been b. Because inflation is caused by an increase in money, decrease in money demand, decrease of goods, increase of demand for goods. So if inflation decreased there was more demand for money but no increase in good supply hence everything levelli...

**Math**

How to solve: There are 40 chickens and cows in the farmyard. There are 100 legs in all. How many are cows and how many are chickens

**chemistry**

use dimensional analysis and the heat vaporization table. Water = 40.7 kj/mol. Start with the information that you were given and make sure that all of your units cancel out! (65.0mL)(1.00g/1mL)(1 mole H2O/18.0g H2O)(40.7kj/1 mole H2O) = 146.9 kj. There are 3 significant figur...

**Math**

What are the intercepts of F(x)=x^3-2x-6 and how do you find the answer? HELP!

**Geography**

Umm... does anyone know anything about Wave Break Island on the Gold Coast, Aus? I need to know why it was developed. I seriously need help!

**english**

for one robe it is: he/she was wearing a robe for more than on robes: wearing robes

**Chemistry**

I know that the more polar the bond between the H and A (if HA is an acid) is, the stronger the acid will be. what does it mean for a bond to be polar? is a bond more polar if it is more electronegative? how are bonds polar and how are bonds nonpolar? what is the difference be...

**Chemistry**

Two of the questions my teacher put on the review sheet for our Acid/Base test are 1) what is the characteristic property of a buffer solution? and 2) what does a buffer solution contain? i think a buffer solution contains a weak acid and its conjugate base or a weak base and ...

**Chemistry**

A solution of acetic acid having a concentration of about 0.2M is to be titrated using 0.200M NaOH. Select an indicator for the titration. what salt will the solution contain at the equivalence point? what is the approximate concentration of this salt at the equivalence point?...

**Math**

From the ff. account balances picked up from the ledger of Morgan Industries on July 15, 2008, prepare a trial balance in good form Morgan, Drawing Drawing 1, 800 Accounts Payable 38, 000 Land 30,000 Sales Discount 3, 600 Purchase Returns and Allowances 3,000 Insurance 1,800 U...

**6th grade science**

what is erosion

**English-Friendship Poem**

this is an awsome poem about a friend

**physical education**

what is the difference between pileades and yoga

**math**

i had the same math project but your going to have to do this by yourself or you will never learn about area correctly

**Accounting**

Rita forms Finch Corporation by transferring land (basis of 125,000; fair market value of 750,000) which is subject to a mortgage of 375,000. Two weeks prior to incorporating Finch, Rita borrows 125,000 for personal purposes and gives the lender a second mortgage on the land. ...

**MS. SUE/english**

dear ms. sue what is a propositional phrase

**math**

nevermind

**math**

soooo sorry this is the wrong question

**math**

using only 1,2,3,4 one time and it must egual 29 would be 2 squared + 1*4+3 squared

**English**

I'm fishing for my word that I can use in my essay that would mean free with giving (almost to a fault), where one gives with little regard to where the money goes and what it would be used for.

**punnett squares**

how would i make a punnet square to find the offspring of parents: SsYy x ssyy I dont understand what i would put for each of the boxes on the outside

**english**

my teacher want me to find an example of assonance in the leda and the swan poem. i know assonance is the repitition of vowel sounds but after looking at the poem, i dont see any. can someone point it out to me?

**math**

Never mind... I got the answer!

**math**

you are designing a 1000-cm^3 right circular cylindrical can whose manufacture will take waste into account. There is no waste in cutting the aluminum for the side, but the top and bottom of radius r will be cut from squares that measure 2r units on a side. The total amount of...

**math**

f(x) = (2x)/ [(x^2 + x + 1)]^(1/2) How would I find the domain of f?

**math**

question: find the points at which the graph of x^2 -4x + y62 -6y =12 has a vertical or horizontal tangent line. I found the deriviative to be (x-2)/(3-y) Then, the x value for a horizontal would be x=2 and the y value for a vertical would be y=3. But how do i find the exact p...

**calculus**

how would i find the deriviative of y= x^ (- square root of 2)

**math**

sorry heres the rest: P(x)= sin(abs(x)) -1

**math**

I dont understand this calculus problem at all. can someone show me step by step? Find all values of x for which the function is differentiable

**bio- double check answers**

Would it be the food web then?

**bio- double check answers**

The ecological succession in an alaskan forest was fireweeds-> shrubs -> hardwood trees-> conifers. The variety of species that are best adapted to life under the prevailing conditions (with the conifers) comprise a. an ecosystem b. a food web c. a climaz community d....

**Science**

What is the conductivity of STAINLESS STEEL?!?!? PLZ help me because I've been searching for DAYS and I really need that fact! Thanks Allie

**Math**

Maybe if you put it into an algebraic expression... Let x be the number, 7x = 3x + 12 and work it out

**economics**

Why would YOU talk about? I mean if you are a developing nation maybe you would want assistance from the UN or somewhere....

**calculus 2**

i dont know

**science**

A ? is a channel along which water is continually flowing down a slope

**chemistry**

use dimensional analysis and the heat vaporization table. Water = 40.7 kj/mol. Start with the information that you were given and make sure that all of your units cancel out! (50.0mL)(1.00g/1mL)(1 mole H2O/18.0g H2O)(40.7kj/1 mole H2O) = 113.0 kj. There are 3 significant figur...

**physics**

Woops! 125km/hr is 34.7m/s so 34.7*14.3 is 496.21m

**physics**

Givens: a=-9.81m/s^2 d=-1001m vi=0m/s d=vit+1/2at^2 -1001m=1/2-9.81m/s^2t^2 -1001m=-4.905m/s^2t^2 divide -1001m by -4.905m/s^2 204s^2=t^2 square root both sides 14.3s=t 125km/hr is 56m/s 56*14.3= 800.8m, that's the distance from the package dropped.

**Chemistry**

Ok, i understand that for real gases you have to account for volume of particles, and that they have attractive forces that lower the pressure, that make the ideal gas law invalid, but what does that have to do with low temp and high pressure?

**Chemistry**

Is it because at high pressure, molecules have volume, and at low temperature gases move slowly and act like a liqud so they have attractive forces that decrease pressure?

**Chemistry**

Ok, i understand that for real gases you have to account for volume of particles, and that they have attractive forces that lower the pressure, that make the ideal gas law invalid, but what does that have to do with low temp and high pressure?

**Chemistry**

I dont know what you just said, but i know that when an ideal gas is at a lower pressure, the molecules do not collide with the container as frequently, and that at a high temperature the molecules do collide frequently. What does this mean, does it even help me?

**Chemistry**

Why do gases behave in a less ideal manner when in LOW TEMP. AND HIGH PRESSURE?

**constellation puppis**

where can I find some basic information on the star puppis for grade 3 level? anyone.

**Maths**

How many different numbers can be made using 4 numbers a b c and d and only + and - ?

**chemistry**

how to find the percent difference?

**french**

What contributions did the french make to america?

**Chemistry**

what is the emission spectrum of the sun and what does this spectrum reveal about the types of elements in the sun?

**Algebra**

Thanks!

**Algebra**

A statue is 8ft. tall. The display case for a model of the statue is 18 inches tall. Which scale allows for the tallest model of the statue that will fit in the display case? A. 1 inch: 2 inches B. 1 inch: 7 inches C. 1 inch: 5 inches D. 1 inch: 10 inches

**Social Studies**

Why is it difficult to travel on many African rivers?

**Chemistry**

Write the formulas of the ions (including charges) present in aqueous solutions of the following: K2CO3 NH4NO3 NA2Cr2O7 Mg(C2H3O2)2 Make sure it is both mass and charge balanced. Here is a listing of many polyatomic ions. This should give you a start. Post with specific questi...

**math - 6th grade**

how do you do front end estimation when the number of digits are different....like 12,249 - 6,875 dgud wat are the poperties of math and what do they all mean????????? i need help in my homework I haven't used the expression "front end" estimation but I would sim...