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April 19, 2014

April 19, 2014

Post a New Question | Current Questions

**college Algebra**

Solve the system, if possible. (If the system is inconsistent, enter INCONSISTENT. If the system is dependent, enter a general solution in terms of x, y, or z.) x + y = 18 y + z = 18 x − z = 0
*Friday, December 13, 2013 at 7:06pm*

**college Algebra**

Solve the system, if possible. (If the system is inconsistent, enter INCONSISTENT. If the system is dependent, enter a general solution in terms of x, y, or z.) x + y + z = 7 2x + y + z = 14 x + 2y + 3z = 2
*Friday, December 13, 2013 at 6:54pm*

**algebra**

At one time, the ratio of in-state to out-of-state tuition at Texas A&M University in college station, TX was about 3:11. About how much was the out-of-state tuition if the in-state tuition at the time was about $2400?
*Friday, December 13, 2013 at 1:47pm*

**math**

A college student is looking at her monthly checking account records. On September 1, 2008, her checking account held a balance of $1,050. At the end of March 2009, her checking account held a balance of $800. What is the monthly rate of change for the student’s checking ...
*Friday, December 13, 2013 at 8:37am*

**College Algebra**

thank you, big help
*Thursday, December 12, 2013 at 7:38pm*

**College Algebra**

2 L + 2 W = 2200 so L + W = 1100 W = L - 300 L + (L-300) = 1100 2L - 300 = 1100 2 L = 1400 L = 700 then W = 400 and A = L * W = 280,000 cm^2
*Thursday, December 12, 2013 at 7:28pm*

**College Algebra**

Use a system of equations to solve the problem. A rectangular picture frame has a perimeter of 2,200 centimeters and a width that is 300 centimeters less than its length. Find the area of the picture. _____ cm2
*Thursday, December 12, 2013 at 6:55pm*

**college chemistry**

If 100.0 mL of 0.0025 M Na2SO4 (aq)is saturated with CaSO4 how many grams of CaSO4 would be present in the solution? [Hint: Does the usual simplifying assumption hold?]
*Thursday, December 12, 2013 at 5:38pm*

**Business English**

I need help writing this: You’ve applied for a specific job in your field of study. The Human Resources Department arranges an interview and tells you to bring with you a polished piece of writing for them to evaluate your writing skills. The paragraph must describe one ...
*Thursday, December 12, 2013 at 2:42pm*

**MATH**

The cost of tuition at Johnson Community College is $190 per credit hour. Each student also has to pay $60 in fees. Write a linear equation model for this situation. Use C for the cost and x for the number of credit hours.
*Thursday, December 12, 2013 at 10:31am*

**College Algebra**

4^-1.5
*Thursday, December 12, 2013 at 8:32am*

**College Algebra**

Minding my p's and q's, I would say: if p = 3q in p = q+4 3q = q+4 2q = 4 q = 2 then p = 6
*Wednesday, December 11, 2013 at 11:19pm*

**College Algebra**

break-even is where revenue = costs, so 3q = q+4 q=2
*Wednesday, December 11, 2013 at 11:17pm*

**College Algebra**

look at the top two "related Questions" below
*Wednesday, December 11, 2013 at 11:05pm*

**College**

The university at Baltimore is primarily a graduate school in the health sciences. I believe the undergrad pre med program is at College Park. http://en.wikipedia.org/wiki/University_of_Maryland,_College_Park http://en.wikipedia.org/wiki/University_of_Maryland,...
*Wednesday, December 11, 2013 at 10:51pm*

**College Algebra**

The equation for the total revenue earned by a company for selling widgets is p=3q. The equation for the total cost of the company for producing widgets is p=q+4. Identify the break-even quantity.
*Wednesday, December 11, 2013 at 10:39pm*

**College Algebra**

Pencils cost 20 cents and pens cost 50 cents. Mabel buys x pencils and y pens, spending $2.00. what is the slope and what does it represent? what is the y-intercept and what does it represent?
*Wednesday, December 11, 2013 at 10:29pm*

**College**

What id the difference between University of maryland college park and University of Maryland Baltimore? I know they are at different locations but which one has what? I looked online but got so many different answers that i got confused.
*Wednesday, December 11, 2013 at 10:21pm*

**College Algebra**

Correct. 20 cents =0.2 $ 50 cents =0.5 $ 0.2 x + 0.5 y = 2 Subtract 0.2 to both sides 0.2 x + 0.5 y - 0.2 x = 2 - 0.2 x 0. 5 y = 2 - 0.2 x multiply both sides by 2 y = 4 - 0.4 x y = - 0.4 x + 4
*Wednesday, December 11, 2013 at 10:13pm*

**College Algebra**

Pencils cost 20 cents and pens cost 50 cents. Mabel buys x pencils and y pens, spending $2.00. Write an equation in slope-intercept form that expresses y in terms of x. slope= -2/5 what does it represent? y-intercept= 4 what does it represent?
*Wednesday, December 11, 2013 at 9:55pm*

**College Algebra**

prob(2 i's, no replacement) = (2/11)(1/10) = 1/55
*Wednesday, December 11, 2013 at 6:47pm*

**College Algebra**

there are 11 letters, and only 2 b's, so P(b) = 2/11
*Wednesday, December 11, 2013 at 6:46pm*

**College Algebra**

I counted 11 letters in the given word, of which two of them were b's so Prob(b) = 2/11
*Wednesday, December 11, 2013 at 6:46pm*

**College Algebra**

slope is the rate of draining y-intercept is the amount at full barrel x-intercept is how long it takes to become empty
*Wednesday, December 11, 2013 at 6:45pm*

**College Algebra**

50 gallon barrel plumb full of water springs a leak in the bottom and leaks at a constant rate of two gallons per minute. y=50-2x slope=-2 what does it represent? y-intercept=50 what does it represent? x-intercept=25 what does it represent?
*Wednesday, December 11, 2013 at 6:30pm*

**College Algebra**

The letters in the word probability are written on separate slips of paper. Find the probability of drawing two i's in a row without replacement.
*Wednesday, December 11, 2013 at 6:18pm*

**College Algebra**

The letters in the word probability are written on separate slips of paper. One slip of paper is drawn at random. Find P(b)
*Wednesday, December 11, 2013 at 6:16pm*

**College Algebra**

They didn't line up correctly. I reposted the correct way.
*Wednesday, December 11, 2013 at 6:14pm*

**College Algebra**

I is always all zeros except the main diagonal. So, here I = 1 0 0 1
*Wednesday, December 11, 2013 at 5:18pm*

**College Algebra**

Erm....? *I found them!* They're in the 3rd row before the = signs. Seriously though, I don't get what you're asking...
*Wednesday, December 11, 2013 at 5:11pm*

**College Algebra**

slope = y2 - y1 / (x2-x1) = 7/5 perpendicular = -1/m so we have -5/7
*Wednesday, December 11, 2013 at 5:10pm*

**College Algebra**

C * x = C x = C/C C/C = 1 x = 1
*Wednesday, December 11, 2013 at 5:09pm*

**College Algebra**

you can do matrix stuff at wolframalpha.com, as in this case, AC= {{2,3,0},{4,1,6}}*{{2,3},{0,1},{1,0}} = {{4,9},{14,13}} Just for grins, showing that matrix multiplication is not commutative, CA={{16,9,18},{4,1,6},{2,3,0}}
*Wednesday, December 11, 2013 at 5:08pm*

**College Algebra**

Find AC A= 2 3 0 4 1 6 C= 2 3 0 1 1 0
*Wednesday, December 11, 2013 at 4:58pm*

**College Algebra **

If CI=C, find I C= 2 3 0 1 1 0
*Wednesday, December 11, 2013 at 4:56pm*

**College Algebra**

Line m passes through (2,5) and (-3,-2). Find the slope of a line that is perpendicular to line m.
*Wednesday, December 11, 2013 at 4:55pm*

**College Algebra**

Find AC A= 2 3 0 C= 2 3 4 1 6 0 1 1 0
*Wednesday, December 11, 2013 at 4:54pm*

**Chemistry**

DrBob222's answer is wrong. You mean to put Cd/Cd^2+ is -0.403, not 0.403. Answer is: 3Cd^2+(aq) + 2In(s) --> 3Cd(s) + 2In^3+(aq) this is right because the short hand notation is: In(s)|In^3+ (aq)||Cd^2+ (aq)|Cd(s) And the Anode is always on the left. ~Information valid...
*Wednesday, December 11, 2013 at 1:06pm*

**college intermediate algebra**

1st person: X min. 2nd person: (X+20) min. X*(X+20)/(X+X+20) = 24 min. (X^2+20X)/(2X+20) = 24 X^2+20X = 48X+480 X^2-28X-480 = 0 Use Quadratic formula and get: X = 40 min. X+20 = 60 min.
*Tuesday, December 10, 2013 at 8:35pm*

**college intermediate algebra**

1/24 = 1/x + 1/(x+20) x = 40
*Tuesday, December 10, 2013 at 8:21pm*

**college algebra**

A circular vent pipe with a diameter of 5.5 inches is place on a roof tht has a slope of 1/4. Find an equation of the ellipse that should be cut from the roof so that the pipe will fit. roound parameters to the nearest hundreth.
*Tuesday, December 10, 2013 at 7:51pm*

**College Algebra**

the minor axis is still 5.5 The major axis is 5.5/cos(arctan .25) check my thinking.
*Tuesday, December 10, 2013 at 6:38pm*

**College Algebra**

A circular vent pipe with a diameter of 5.5 inches is place on a roof tht has a slope of 1/4. Find an equation of the ellipse that should be cut from the roof so that the pipe will fit. roound parameters to the nearest hundreth.
*Tuesday, December 10, 2013 at 6:34pm*

**college intermediate algebra**

Working together, two people can mow the lawn in 24 minutes. Working alone, one person takes 20 minutes longer than the other. How many minutes would it take each person to mow the lawn alone? Thanks!!!
*Tuesday, December 10, 2013 at 3:35pm*

**College Chemistry**

Surely you don't mean aqueous for (SO3) and (O2).
*Tuesday, December 10, 2013 at 1:53pm*

**College Chemistry**

Consider the following reaction, equilibrium concentrations, and equilibrium constant at a particular temperature. Determine the equilibrium concentration of SO2(g). 2SO2(g)+O2(g)=2SO3(g) Kc=1.7*10^8 [SO3]aq=0.0034 M [O2]aq=0.0018 M
*Tuesday, December 10, 2013 at 4:19am*

**Intermediate Algebra (College)**

...I don't know thats exactly why I was asking actually. cool. thanks.
*Tuesday, December 10, 2013 at 12:43am*

**Intermediate Algebra (College)**

no, you have to multiply every term by x^2. This method skips the 5/x term. Then your second line skips the 14 term when multiplying by x. What kind of algebra is that?
*Tuesday, December 10, 2013 at 12:28am*

**Intermediate Algebra (College)**

That's exactly what I was thinking, then I was also thinking, wouldn't this work? 14 - 5/x = x^2 14 - 5 = x^3 9 = x^3 ???
*Tuesday, December 10, 2013 at 12:11am*

**Intermediate Algebra (College)**

assuming x≠0, multiply by x^2 to get 14 - 5x = x^2 x^2+5x-14 = 0 (x+7)(x-2) = 0 I think you can take it from there, no?
*Tuesday, December 10, 2013 at 12:09am*

**Intermediate Algebra (College)**

Solve algebraically: 14/x^2 - 5/x = 1 Thank you!!! (:
*Tuesday, December 10, 2013 at 12:03am*

**math**

Yumi's grandparents presented her with a gift of $11,000 when she was 8 years old to be used for her college education. Over the next 9 years, until she turned 17, Yumi's parents had invested her money in a tax-free account that had yielded interest at the rate of 5.5...
*Monday, December 9, 2013 at 7:03pm*

**College Algebra 105**

any rational zeros have numerators which divide 13 and denominators which divide 169. That means ±(1,13)/±(1,13,169) or, ±1 ±13 ±1/13 ±1/169 A little synthetic division shows that there are no rational roots.
*Monday, December 9, 2013 at 12:15pm*

**College Algebra 105**

use the rational zero's theorem to list the potential zero's of the polynomial function. Do not attempt to find the zero's f(x)=-169x^7-x^6+x+13 and then the second part is find the potential rational zero's.
*Monday, December 9, 2013 at 11:45am*

**college stats**

Post a null hypothesis that would use a t test statistical analysis
*Sunday, December 8, 2013 at 9:46am*

**college algebra**

solve the system 2x+y=-4 -x+y= 2 2x + y = -4 -2x + 2y = 4 3y = 0 y =0 x = -2 (-2,0)
*Saturday, December 7, 2013 at 9:38pm*

**college algebra**

solve the system 2x+y=-4 -x+y= 2
*Saturday, December 7, 2013 at 8:23pm*

**college chemistry**

2.00g of NaOH are dissolved in water to make 5.00L of solution. What is the concentration of hydronium ions, [H3O+], in this solution?
*Saturday, December 7, 2013 at 12:53am*

**economic**

College enrollments increased at the same time that average tuition rose dramatically. Does this contradict the law of downward-sloping demand? Explain. (b) Use supply and demand model to explain the dramatic rise in the price of a college education
*Friday, December 6, 2013 at 8:39pm*

**college stats**

z = (p1 -p2)/sqrt(p1/n1 + p2/n))
*Thursday, December 5, 2013 at 11:44pm*

**college stats**

Suppose population proportion1 = 0.4, sample size1 = 100, population proportion2 = 0.5, sample size2 = 120. whats the formula? i think this is just a plug and chug
*Thursday, December 5, 2013 at 8:16pm*

**college stats**

in a sample of 159,949 first year college students, the national survey of student engagement reported that 39% participated in community service or volunteer work.find the margin of error for 99% confidence. what formula do I use? I know the 99% interval for z is 2.576 n is ...
*Thursday, December 5, 2013 at 7:49pm*

**stats**

in a sample of 159,949 first year college students, the national survey of student engagement reported that 39% participated in community service or volunteer work.find the margin of error for 99% confidence. ...idk what formula to use.
*Thursday, December 5, 2013 at 7:41pm*

**Just think twice.**

I have this exact same class as you. And before i come to this site, i FIRST complete my whole exam and than check my answers here, and the ones i get wrong, i just get wrong on my actual exam. I dont change a thing. This college sweetie, and there is absolute nothing wrong ...
*Thursday, December 5, 2013 at 12:42am*

**chemistry college**

The secret to these is to recognize what you have in the solution at each addition. The first thing you do is to determine where the equivalence point is; i.e., number of mL HCl added to get to the equivalence point. 20 mL--you have a mixture of NH3 and NH4Cl. That makes a ...
*Wednesday, December 4, 2013 at 7:39pm*

**chemistry college**

Consider the titration of 30.0 mL sample of 0.050 M NH3 with 0.025 M HCl. Calculate the pH after the following volumes of titrant (acid)have been added: a)0 mL, b)20.0mL, c)60.0mL, d)65mL Kb for NH3 is 1.8 x 10^-5
*Wednesday, December 4, 2013 at 5:33pm*

**College Algebra**

#1. assuming base 8, just for ease of readability, 2logx = log(4x+12) log(x^2) = log(4x+12) so, if the logs are equal, so are the numbers: x^2 = 4x+12 x^2-4x-12=0 (x-6)(x+2)=0 x=6 only, since log(-2) is not real. #2. so far, so good. Recall that adding/subtracting logs means ...
*Wednesday, December 4, 2013 at 2:46pm*

**College Algebra**

1. 2log8^x=log8(4x+12) both log bases are 8. I have no clue what to do. 2. 1/2ln (x) -3 ln y - ln (z-2) so far for this second one i have ln sqrt(x)-ln y^3 - ln (z-2) dont know what to do next
*Wednesday, December 4, 2013 at 1:17pm*

**English**

Q: To be a doctor at a hospital, do they all need to get doctors's degree in college?
*Tuesday, December 3, 2013 at 4:22pm*

**College algebra**

x=2y+3, so 3(2y+3)+4y=59 6y+9+4y=59 10y=50 ...
*Tuesday, December 3, 2013 at 4:05pm*

**College algebra**

y=3x-2, so 6x-2(3x-2)=30 6x-6x+4=30 no solution
*Tuesday, December 3, 2013 at 4:00pm*

**College algebra**

Solve the system Y=3x-2 6x-2y=30
*Tuesday, December 3, 2013 at 3:29pm*

**College algebra**

Solve the system X=2y+3 3x+4y=59
*Tuesday, December 3, 2013 at 3:28pm*

**English**

Hello, Dr. Green. ------------------ In this expression, is Dr. Green a doctor who works at a hospital? Or is Dr. Green a professor in college?
*Tuesday, December 3, 2013 at 2:37pm*

**College Algebra**

#1. just change the sign of all the elements of A. #2. just multiply all the elements by 3.
*Tuesday, December 3, 2013 at 12:50pm*

**College Algebra**

m = (-2-5)/(-3-2) m = 7/5 Perpendicular m = -5/7
*Tuesday, December 3, 2013 at 12:49pm*

**College Algebra**

line m has slope ∆y/∆x = (-2-5)/(-3-2) = 7/5 the perpendicular line's slope is the negative reciprocal, or -5/7
*Tuesday, December 3, 2013 at 12:47pm*

**College Algebra**

A= [2 3 0] [4 1 6] 1. what is the additive inverse of A? 2. find 3A.
*Tuesday, December 3, 2013 at 12:46pm*

**College Algebra - incomplete**

from what?
*Tuesday, December 3, 2013 at 12:45pm*

**College Algebra**

Line m passes through (2,5) and (-3,-2) Find the slope of a line that is perpendicular to line m.
*Tuesday, December 3, 2013 at 12:44pm*

**College Algebra**

Find the probability of drawing two i's in a row without replacement.
*Tuesday, December 3, 2013 at 12:42pm*

**College Physics**

how do you solve this?
*Sunday, December 1, 2013 at 11:18pm*

**math**

At a certain college, there are 7 men for every 5 women. If there are 440 more men than women, what is the total enrollment?
*Sunday, December 1, 2013 at 9:17pm*

**college calculus**

thank you steve
*Saturday, November 30, 2013 at 10:59pm*

**college calculus**

just do it as usual. ∫[lnx,x^3] (z^4+1) dz = 1/5 z^5 + z [lnx,x^3] = (1/5 x^15 + x^3)-(1/5 ln^5(x) + ln(x)) Not very pretty, but c'est la vie...
*Saturday, November 30, 2013 at 10:47pm*

**college calculus**

I don't know how to solve this indefinite integral with both limits as variables: ^x^3 ç (z^4+1)dz ⌄ln(x) If you could explain I'd appreciate it.
*Saturday, November 30, 2013 at 10:36pm*

**Probability and Statistics**

The proportion of adults living in a small town who are college graduates is estimated to be p = 0.6. To test this hypothesis, a random sample of 15 adults is selected. If the number of college graduates in the sample is anywhere from 6 to 12, we shall not reject the null ...
*Saturday, November 30, 2013 at 8:06pm*

**College Physics**

reactance magnitude = V/i for inductance V = L di/dt if i = a sin wt di/dt = a w cos wt and V = L a w cos wt magnitude of V/i = Lw = 2 pif L here L = 42 * 10^-6 so reactance = 2 pi f (42*10^-6) for capacitor C = q/V V = q/C = (1/C) integral i dt if i = a sin w t V = (1/C) (a/w...
*Saturday, November 30, 2013 at 8:03pm*

**College Physics **

At what frequency does the inductive reactance of a 42.0 µH inductor equal the capacitive reactance of a 42.0 µF capacitor? kHz
*Saturday, November 30, 2013 at 6:41pm*

**College Chemistry**

Complete the table for aqueous solutions of caffeine C8H10O2N4. a. given: mole fraction solven:0.900 find molality, mass percent solvent, Ppm solute
*Saturday, November 30, 2013 at 4:43am*

**Probability and Statistics**

The proportion of adults living in a small town who are college graduates is estimated to be p = 0.6. To test this hypothesis, a random sample of 15 adults is selected. If the number of college graduates in the sample is anywhere from 6 to 12, we shall not reject the null ...
*Saturday, November 30, 2013 at 1:50am*

**College Chemistry**

if you plug in Z=2^2 n=1 its wrong and i dont knwo why
*Friday, November 29, 2013 at 8:26pm*

**College Chemistry**

if you plug in Z=2^2 n=1 its wrong and i dont knwo why
*Friday, November 29, 2013 at 8:26pm*

**Probability and Statistics**

The proportion of adults living in a small town who are college graduates is estimated to be p = 0.6. To test this hypothesis, a random sample of 15 adults is selected. If the number of college graduates in the sample is anywhere from 6 to 12, we shall not reject the null ...
*Friday, November 29, 2013 at 7:30pm*

**College alerbra**

ok, then take log of both sides log (4^(x+2) ) = log (9^x) (x+2)log4 = xlog9 xlog4 + 2log4= xlog9 2log4 = xlog9 - xlog4 x(log9-log4) = 2log4 x = 2log4/(log9-log4) button-pushing time .... x = appr 3.419
*Friday, November 29, 2013 at 4:00pm*

**College alerbra**

yes i meant 4^(x+2)=9^x
*Friday, November 29, 2013 at 3:28pm*

**College alerbra**

A rough sketch of y = 4^(x+2) and y = 9x shows that the two can never meet. So, there is no solution Did you mean: 4^(x+2) = 9^x ?
*Friday, November 29, 2013 at 3:12pm*

**College alerbra**

solve the exponential equation. 4^(x+2)=9x
*Friday, November 29, 2013 at 2:51pm*

**College**

7x+6=x-30 7x -x + 6 = x -x -30 6x + 6 = -20 6x + 6 -6 = -30 -6 6x = -36 x = -6
*Friday, November 29, 2013 at 1:00am*

**College**

7x+6=x-30
*Friday, November 29, 2013 at 12:21am*

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Post a New Question | Current Questions