Monday

May 25, 2015

May 25, 2015

Total # Posts: 3,032

**Pre-Calc**

A rectangular package to be sent by a delivery service can have a maximum combined length and girth (perimeter of a cross section) of 120 inches. a. Show that the volume of the package is V(x)= 4xsquared(30-x) b. Use your graphing calculator to find the dimensions of the ...
*September 26, 2010*

**Math(Please help)**

The first one x=2sqrt(6x-36)
*September 20, 2010*

**Math(Please help)**

I know I posted this yesterday but I really do not understand this and I did not quite understand the comment on what to do. Find the real solutions of the equation. x = 2 sqrt6x-36
*September 20, 2010*

**Math(Please check)**

Find the real solutions by factoring. 7x^3 = 2x^2 x^2(x+7) = x(x+2) x=0 x=-7 x=-2 Is this correct?
*September 20, 2010*

**Math(Please help)**

Find the real solutions of each equation. 1) 1 / (x+6)^2 = 1 / (x+6) + 12 2) 8x^2/3 - 39x^1/3 - 5 = 0 I have no idea how to do these. Please help!!! Thank you!
*September 20, 2010*

**SCIENCE!!**

10m/s i believe and that is going up and down if you neglect air resistance
*September 20, 2010*

**Math**

I know I posted this yesterday but I really do not understand this and I did not quite understand the comment on what to do. Find the real solutions of the equation. x = 2 sqrt6x-36
*September 20, 2010*

**Math(Please help)**

Would x be $4,583.33? From the equation x(o.17) + (70,000-x)(0.07) = 6,000 I got 0.17x + 4,900 -0.07x = 6,000 and then I subtracted 4,900 from 6,000 and I added 0.07 to 0.17 and got 0.24x. Is this correct?
*September 19, 2010*

**Math(Please help)**

Betsy, a recent retiree, requires $6,000 per year in extra income. She has $70,000 to invest and can invest in B-rated bonds paying 17% per year or in a CD paying 7% per year. How much money should be invested in each to realize exactly $6,000 in interest per year? I do not ...
*September 19, 2010*

**math(Please help)**

Betsy, a recent retiree, requires $6,000 per year in extra income. She has $70,000 to invest and can invest in B-rated bonds paying 17% per year or in a CD paying 7% per year. How much money should be invested in each to realize exactly $6,000 in interest per year? I do not ...
*September 19, 2010*

**math(Please check)**

Find the real solutions of the equation: 14x^2 - 5x^2 - 1 = 0 I know that you have to use au^2 + bu +c = 0 so u^2 - 5x -1 which is prime. So would the answer be that the solution is the empty set?
*September 19, 2010*

**math(please help)**

Find the real solutions of each equation. x=2 srqt 6x-36 I do not know where to start.
*September 19, 2010*

**Math(Please check)**

or A=pi r^2
*September 19, 2010*

**Math(Please check)**

Translate the following sentence into a mathematical equation: "The area, A, of a circle is the product of the number pi and the square of the radius, r." A=pi X r^2 Is this correct?
*September 19, 2010*

**math**

There are 18 students standing in a circle, evenly spaced and consecutively numbered. Which student is directly opposite student 1
*September 19, 2010*

**chemistry**

huh? what set up that u did? wait r u bobpursley?
*September 15, 2010*

**chemistry**

thanks. what about: block of aluminum with a volume of 98.2 cm3 absorbs 67.4 J of heat. If its initial temperature was 32.5 °C, what is its final temperature? (density of aluminum = 2.70 g/cm3) I know i have to change the volume to grams. but i dont know how to lay out the...
*September 15, 2010*

**chemistry**

A 43 kg sample of water absorbs 343 kJ of heat. If the water was initially at 22.1°C, what is its final temperature? I got 1.9 but i think i didn't do it correctly
*September 15, 2010*

**chem.**

oh, would it be 24 (two sig figs) cause in the problem 43 has the least number of sig figs(2) or do we go by this equation: 343,000 = 43,000 x 4.184 x (Tf-22.1) = 0 and use 3 sig figs?
*September 15, 2010*

**chem.**

thank you so much!!
*September 15, 2010*

**Physics**

when i solve for t I get an extremely small number like .1998. I don't think I am setting up the problem right or something.
*September 13, 2010*

**Physics**

At t = 0, a stone is dropped from a cliff above a lake; 2.0 seconds later another stone is thrown downward from the same point with an initial speed of 33 m/s. Both stones hit the water at the same instant. Find the height of the cliff.
*September 13, 2010*

**college: psychology**

3. Define proactive & retroactive inhibition. Create a memory strategy to help you remember & discriminate between them. Explain this strategy well enough so that a reader could learn to use it.
*September 13, 2010*

**conversion**

a)339 Cal to kilowatt-hours
*September 11, 2010*

**6th grade science**

you are right!<:
*September 11, 2010*

**Geography**

I'm confused. What's this article got to do with the question I posted. The website has to do with the rainforest
*September 10, 2010*

**Geography**

This is my last question that I'm struggling with. We had to do 25 of them and this one I can't figure. Thank you for your help. It's greatly appreciated. Have a great weekend!!! More water flows through the Amazon Basin than through any other river system. ...
*September 10, 2010*

**Geography**

Due to the violent & complex origins of the Andies, many rich & precious metals and minerals were found in the Andies. The inital economic wealth of many Adean coutries came from mining gold, silver, tin, copper, and iron. How can this cause conflict with other nations?
*September 10, 2010*

**Math(Please help)**

1) An expression that occurs in calculus in given. Reduce the expression to lowest terms. (2x + 5) 4x - 2x^2(2) / (2x+5)^2 I have no idea what to do for this. 2) Simplify the expression. Express the answer so that only positive exponents occur. Assume that all variables are ...
*September 9, 2010*

**Math(Please help)**

1) An expression that occurs in calculus in given. Reduce the expression to lowest terms. (2x + 5) 4x - 2x^2(2) / (2x+5)^2 I have no idea what to do for this. 2) Simplify the expression. Express the answer so that only positive exponents occur. Assume that all variables are ...
*September 9, 2010*

**Please check answers)**

SO for #2 the answer is a-a^2 or +a^2?
*September 9, 2010*

**Please check answers)**

Perform the indicated operations and simplify the result. Leave your answer in factored form. 1) x/16 - 1/x all over 1 + 4/x A) x+4/16 B) x-4/16 C) 16/x+4 D) 16/x-4 E) -16/x+4 I chose answer C. I saw this as x^2-16/ x+4. Multiply the following using the FOIL method. Express ...
*September 9, 2010*

**Math(Please check answers)**

Factor completely. If the polynomial cannot be factored say it is prime. 1) 15x^3 + 19x^2 + 6x A) (3x^2 +2)(5x+3) B) x(3x+2)(5x+3) C) x^2(3x+2)(5x+3) D) x(5x+2)(3x+3) E) Prime I chose E) Prime. 2) 2x^2 - 14x - 6x + 42 A) 2(x+7)(x+3) B) (x+7)(2x-6) C) 2(x-7)(x-3) D) (x-7)(x-3) ...
*September 9, 2010*

**English**

How would you write this as a topic sentence so it sounds like a theme for a book. The author is great at making someone who has a handicap or disability not feel so abnormal but a benefit to society.
*September 8, 2010*

**Calculus**

Thank you. Can you tell me how to actually work the problem, too? Thanks again!
*September 7, 2010*

**Calculus**

Determine whether the curve has a tangent at the indicated point. f(x)= sin x 0<x<3pi/4 cos x 3pi/4<x<2pi at x = 3pi/4
*September 7, 2010*

**Math**

Simplify expression. Answers should only have positive exponents. Assume all variables are positive. (4x^2 y^-1/3)^3/14 so would it be x^2(3/14) and y^-1/3(3/14)?
*September 7, 2010*

**English**

What does this mean? Gray Fire learns a lesson in excessive pride as a child when he believes that he can outrun the night and later must sacrifice his own toes to save his life, which then renders his gift of speed useless.
*September 7, 2010*

**Math**

Simplify expression. Answers should only have positive exponents. Assume all variables are positive. (4x^2 y^-1/3)^3/14 so would it be x^2(3/14) and y^-1/3(3/14)?
*September 7, 2010*

**math**

explain why 1,734 is greater than 175
*September 7, 2010*

**Math**

estimated population
*September 7, 2010*

**Math(Please help)**

Simplify each expression. Assume all variables are positive. 1) 3 sqrt2 - 8 sqrt128 I think you subtract the 3 from the 8 but I do not know what else to do. 2) Simplify expression. Answer should have only positive exponents. (8x^3 y^-1/2)^2/15 Do I multiply the exponents?
*September 6, 2010*

**Math**

is it like a picture and you use the protractor to find the measure?
*September 6, 2010*

**chemistry**

density = mass/volume
*September 6, 2010*

**Math**

Directions: Use each statement as givena and draw a single conclusion using all of the statements. 1) No birds,except ostriches, are nine feet high.There are no birds in this aviary that belong to anyone but me. No ostrich lives on mince pie. I have no birds less than nine ...
*September 6, 2010*

**Math**

Simplify each expression (-216)^1/3 My answer is 1/6. Am I correct. (x^4y)^1/3 (xy^4)^2/3 I do not know how to simplify this.
*September 6, 2010*

**Math(Please check)**

How did you get 3?
*September 6, 2010*

**Math(Please check)**

Sorry I forgot a question. 2) rationalize the denominator. 4/sqrt6 My answer is 4sqrt6/ 6 Am I correct?
*September 6, 2010*

**Math(Please check answer)**

Simplify each expression. 1)(sqrt7 + 5)(sqrt7 -6) My answer is sqrt 7 - 30 Am I correct?
*September 6, 2010*

**Math(Please check answers)**

Thank you!
*September 5, 2010*

**Math(Please check answers)**

1) Solve the equation: 15(7x-6) = 3x-5 My answer is (-85/108) 2) Mary and her brother collect coins. Mary has 4 times the number of coins that her brother has. Together they have 175 coins. How many does Mary have? My answer is 140 3) Perform the indicated operations. Express ...
*September 5, 2010*

**chem**

and also. A car seat fades with extended exposure to sunlight. thats chemical not physical right?
*September 4, 2010*

**chem**

when Flour, water, sugar and other ingredients are combined and baked into a cakeis that a chemical change?
*September 4, 2010*

**math**

how do u do 18t +12r over 3?
*September 1, 2010*

**Math**

Thank you!!
*August 29, 2010*

**Math**

Simplify each expression: 1) (x+8)^2 = x^2 + 64 2) (x-2)^3 = x^3 - 8 So for (x+8)^2 i would use a^2 + 2ab + b^2 and a would be 8 but what is b? Would it be 64?
*August 29, 2010*

**Math(please check)**

so for (x+8)^2 i would use a^2 + 2ab + b^2 and a would be 8 but what is b? Would it be 64?
*August 29, 2010*

**Math(please check)**

Simplify each expression: 1) (x+8)^2 = x^2 + 64 2) (x-2)^3 = x^3 - 8 3) (x-2y)(x+y) = x^2 - xy -2y^2 4) (x+2)(x^2+3x-2) = x^3 + 5x^2 + 4x-4 Are my answers correct?
*August 29, 2010*

**Math(Please check)**

Nevermind i added wrong. I got it. Thanks!!
*August 28, 2010*

**Math(Please check)**

How do I get 350?
*August 28, 2010*

**Math(Please check)**

Divide 5x^4 - 3x^2 + 8x + 6 by x^2 + 8 My answer was 5x^2 - 43 with a remainder of 8x - 338. Is this correct?
*August 28, 2010*

**Math(Please check)**

State whether the expression is a polynomial. If it is, state the degree. a) 3x^2 - 7x + 2 = yes;3 b) 3x - 2/x = No c) sqrt2x^2 - 3pi = yes;2 sqrt2x + 5x = yes;1 Am I correct?
*August 27, 2010*

**Math**

Simplify the equation: 8^-3 X 8 I know that 8^-3 is 1/512 so do I now multiply the 8 to the 1 and 512?
*August 26, 2010*

**Math(Please help)**

Simplify the expression: (x^9y^-4)^6 x^54/y^24 Is this correct?
*August 26, 2010*

**Math(Please help)**

Simplify the equation: 8^-3 X 8 I know that 8^-3 is 1/512 so do I now multiply the 8 to the 1 and 512?
*August 26, 2010*

**math**

Simplify the expression: (x^9y^-4)^6 x^54/y^24 Is this correct?
*August 26, 2010*

**math**

Simplify the equation: 8^-3 X 8 I know that 8^-3 is 1/512 so do I now multiply the 8 to the 1 and 512?
*August 26, 2010*

**conversion problems**

ok! i get it thanks:)
*August 25, 2010*

**conversion problems**

wait shouldn't it just be one number for the answer?
*August 25, 2010*

**conversion problems**

oh = 12600/4880 g/cm^3 so how did u get from that to = 315/122 g/cm^3 ?
*August 25, 2010*

**conversion problems**

so would it be 12600/4880? so. 2.582 i have no idea if i did that wrong.
*August 25, 2010*

**conversion problems**

Im not sure how to convert these because of the cm cubed heres the question: An aluminum engine block has a volume of 4.88 L and a mass of 12.60 kg. What is the density of the aluminum in grams per cubic centimeter? so its gonna be something g/cm3 can you tell me what it is ...
*August 25, 2010*

**dif. bet. Mm and mm**

oh haha thats y i was totally off thanks!
*August 24, 2010*

**dif. bet. Mm and mm**

I was just working on a problem and i seem to keep getting it wrong. I think i might be converting wrong. all im wondering is.. is Mm the same as mm(millimeters)?
*August 24, 2010*

**conversion problems**

150. cm to millimeters i got it to 1500mm. but it said check the number of sig figs.
*August 24, 2010*

**com 285**

do you just need to know some info about it. heres a site that i find helpful htt*p://owl.*english.purdue.ed*u/owl/resource/6*36/01/ (take out the *'s
*August 24, 2010*

**science**

im pretty sure that equation is for Partial Pressure. Im not sure how to explain it though sorry :/
*August 24, 2010*

**Chemisty (Sig Figs)**

oh i understand thanks a bunch! youve helped me a lot!!
*August 23, 2010*

**Chemisty (Sig Figs)**

oh so i have to round. so id be 7.7e6?
*August 23, 2010*

**Chemisty (Sig Figs)**

this is my last question for the whole assigment and im soo glad!!! (9465 + 45 - 9.9) 8.1 X 10^6 i got 76950.e6 it said it was half right and said check your number of sig figs
*August 23, 2010*

**Maath**

first-distribute second-put like terms together third- get r on one side i didn't do the problem. but thats the steps
*August 23, 2010*

**Math**

A woman sells 18 containers of milk a day. Each container holds 22 quarts and a quart of milk weighs 1 1/2 pounds. If each of the cows give 25 pounds of milk a day, then at least how many cows must she have?
*August 23, 2010*

**Chemisty (Sig Figs)**

79.7 + 890.43 - 23 = 9.5 e2 its wrong and I am suppose to correct it.
*August 23, 2010*

**Chemisty (Sig Figs)**

Each of the following numbers was supposed to be rounded to two significant figures. For each one below, decide whether it was correctly rounded or not, and for those that were incorrectly rounded, correct them. (a) 3.149 e3 to 3.2 e3 Its incorrect but I dont know the correct ...
*August 23, 2010*

**French**

oh ok, I got it busy schedule. right. Thanks:)
*August 22, 2010*

**French**

oh so emploi du temps is schedule... oh ok. so do you think le lycee would work?
*August 22, 2010*

**French**

ok, so is emploi like a schedule or I thought it was a job?? Yah I have to use voacbs words from the chapter which focus on school and likes and dislikes.
*August 22, 2010*

**French**

Marianne a peur de son emploi du temps ________________ et elle va parler avec son ____________ d'éducation pour abandonner un cours difficile. Whats the first one? I need help!
*August 22, 2010*

**Math**

your welcome:)
*August 22, 2010*

**Math**

y=mx+b(Slope-intercept) Slope= 4-0/0-(-3) Slope= 4/3 then put a point in the formula. 4=0x4/3+b so b=4 final equation: y=4/3x+4
*August 22, 2010*

**French III**

Also this... Je pense que Pierre va l'__________________ avec elle. Veuillez choisir une réponse. a. aller b. attendre c. amener d. prendre
*August 22, 2010*

**French III**

Marianne a peur de son emploi du temps ________________ et elle va parler avec son ____________ d'éducation pour abandonner un cours difficile. I know the second one but need help on the first. Thanks:)
*August 22, 2010*

**math-please check**

is the solution to 2x^2-4x+5... 1(+/-)((sqrt6)/2)i ??
*August 22, 2010*

**PreCal**

It's 3.1
*August 15, 2010*

**9th grade**

Identify the type of subordinate clause in the following sentence. The guy who ran out of the clinic is running late. noun adjective adverb
*August 9, 2010*

**english**

They left the oven on; consequently, the roast was burnt beyond recognition. which is it of these? conjunctive adverb coordinating conjunction correlative conjunction subordinating conjunction
*August 6, 2010*

**HIS/135 Reagan's Economics**

I was hoping for some feedback before I turn in this short essay. Assignment: Compare and Contrast the "culture of consumption "during the Eisenhower administration with the "Decade of greed" during the Reagan presidency in 175-225 words. Reagan’s ...
*July 31, 2010*

**Writing**

Thank you! That was perfect!!
*July 28, 2010*