Wednesday

April 23, 2014

April 23, 2014

Post a New Question | Current Questions

**college algebra**

A. They've told you what P(x) is: P(x) = R(x)-C(x) = 47x-.3x^2 - (8x+16) = -.3x^2 + 39x - 16 Now , that's just a parabola, and you know that the parabola ax^2+bx+c has its vertex at x = -b/2a, so max profit P(x) occurs at x = -39/-.6 = 65
*Wednesday, April 3, 2013 at 3:32pm*

**college algebra**

At Allied electronics, production has begun on x-15 computer chip. The total revenue function is given by. R(x)=47x-0.3x^2 and the total cost function is given C(x)=8x+16, where x represents the number of boxes of computer chip produced. A. Find the profit function in P(x)=R(x...
*Wednesday, April 3, 2013 at 3:13pm*

**college algebra**

At Allied electronics, production has begun on x-15 computer chip. The total revenue function is given by. R(x)=47x-0.3x^2 and the total cost function is given C(x)=8x+16, where x represents the number of boxes of computer chip produced. A. Find the profit function in P(x)=R(x...
*Wednesday, April 3, 2013 at 2:41pm*

**randhills college life orientation**

Identify and describe 3 environmental halth that cause ill health
*Wednesday, April 3, 2013 at 9:25am*

**college physics**

a tennis ball is thrown straight up with an initial velocity of 22.5 m/s. it is caught at the same distance above the ground. a). how long does it take to reach its maximum height? b). how high does the ball rise? c). at what speed does it hit the ground? d). what total length...
*Tuesday, April 2, 2013 at 11:53pm*

**math**

random sample of 9600 students. Multistage design effect similar to an SRS (for those still in school) 46% had at least one parent who was a college graduate. Estimate with 99% confidence the proportion of all students who had at least one parent who was a college grad. b) ...
*Tuesday, April 2, 2013 at 9:27pm*

**college algebra**

for the domain, we know that √u must have u>=0, so we need x-2>=0, or x>=2. the range is [0,oo) domain and range are switched for the inverse
*Tuesday, April 2, 2013 at 1:38pm*

**college algebra**

f(x)=√x-2 Find the domain of the function is it x-2 the range of function is it (00,-2) the domain of the inverse is it x>-2 The range of the inverse is it (-2,00) Thanks
*Tuesday, April 2, 2013 at 1:01pm*

**college algebra**

2(10 * 25) + 2(10 * 50) + 2(25 * 50) = ______ square cm
*Tuesday, April 2, 2013 at 12:22pm*

**college algebra**

How much paper would you need to wrap a box 10cm wide, 25cm high, and 50cm long?
*Tuesday, April 2, 2013 at 12:20pm*

**college algebra**

3√z+1 = -3 3√z = -4 Now, √z is interpreted to be positive √4 = 2, not ±2 so, there is no solution to the equation 3√z = -4 since √z is positive However, we can go on to say that 3√z = -4 9z = 16 z = 16/9 But, this is really a ...
*Monday, April 1, 2013 at 5:34pm*

**college algebra**

I need help solving this equation. 3√z+1=-3 How do I do this problem? Thanks for your help.
*Monday, April 1, 2013 at 5:09pm*

**College Statistics**

yes
*Monday, April 1, 2013 at 1:24am*

**College Algebra**

45
*Sunday, March 31, 2013 at 8:42pm*

**college math**

What is 1000(1.03)^8 ?
*Sunday, March 31, 2013 at 7:27pm*

**college math**

An initial investment of $1000 is appreciated for 4 years in an account that earns 6% interest, 2) compounded semiannually. Find the amount of money in the account at the end of the period.
*Sunday, March 31, 2013 at 4:45pm*

**math**

random sample of 9600 students. 46% had at least one parent who was a college graduate. Estimate with 99% confidence the proportion of all students who had at least one parent who was a college grad. b) Sample does not include drop outs so estimate is valid only for students. ...
*Sunday, March 31, 2013 at 3:50pm*

**college physics**

h = Vo*t + 0.5g*t^2. = 3.6 0 * 4.9t^2 = 3.6 t^2 = 0.735 . Tf = 0.857 s. = Fall time. d = Xo * Tf = 13.4m/s * 0.857s. = 11 m.
*Saturday, March 30, 2013 at 7:01pm*

**college physics**

a. d = 0.5a*t^2. d = 0.5*3*30^2 = 1350 m. b. V = a*t = 3 * 30 = 90 m/s.
*Saturday, March 30, 2013 at 6:46pm*

**college physics**

V^2 = Vo^2 + 2a*d. a = (V^2-Vo^2)/2d a = (0-(23)^2)/420 = 1.26 m/s^2.
*Saturday, March 30, 2013 at 6:37pm*

**College Statistics**

A random variable X has a Gamma distribution with (alpha = a, beta = b). Show that P(X > 2ab) < (2/e)^a. hint: X > c is equivalent to e^Xt > e^ct
*Saturday, March 30, 2013 at 3:05pm*

**college American Government**

They should up the security by doing extreme check to make sure that their is no terrorism
*Saturday, March 30, 2013 at 8:07am*

**college physics**

24.633m/s
*Friday, March 29, 2013 at 6:36pm*

**statistics**

1. 35% of North Americans do not think that college education is a contributory factor to economic success. A random sample of seven North Americans is selected
*Friday, March 29, 2013 at 5:29pm*

**college physics**

a bus that is traveling at 30.0km/h speeds up at a constant rate of 3.5m/s2. what velocity does it reach 6.8s later?
*Friday, March 29, 2013 at 5:29pm*

**college physics**

a bicyclist rides off a flat roof at 13.4m/s, the roof is 3.6m above the ground, how far from the edge of the building does the bicyclist land? round the answer to the nearest meter.
*Friday, March 29, 2013 at 5:28pm*

**college physics**

an airplane starts from rest and accelerates at a constant 3.00m/s2 for 30.0s before leaving the ground. a). how far did it move? b). how fast was the airplane going when it took off?
*Friday, March 29, 2013 at 5:26pm*

**college physics**

a woman driving at a speed of 23 m/s sees a deer on the road ahead and applies the brakes when she is 210m from the deer. if the deer does not move and the car stops right before it hits the deer, what is the acceleration provided by the car's brakes?
*Friday, March 29, 2013 at 5:25pm*

**college algebra**

X=(1/16)^(3/2) X=64
*Friday, March 29, 2013 at 4:32pm*

**valencia college**

can 4/5 be the probability of an event
*Friday, March 29, 2013 at 3:35pm*

**Statistics**

Hello. I would like to ask a college statistics question. Q. One hundred draws are made at random with replacement from the box [1,2,2,5]. The draws come out as follows:17 [1]'s, 54 [2]'s, 29 [5]'s. Fill in the blanks, using the options below; show work. (a) For ...
*Thursday, March 28, 2013 at 4:56pm*

**Chemistry (College) URGENT**

molar mass= 90.01 g/mol and Ka= 1.38 x 10^-4
*Thursday, March 28, 2013 at 12:51pm*

**college algebra**

I apologize! I misread your equation. Multiply through by x^2 gives: 9x^2-8x-2=0. Use Quadratic Formula to get two solutions: (8+sqrt(136))/18 and (8-sqrt(136))/18. I checked, and both work!
*Thursday, March 28, 2013 at 9:36am*

**college algebra**

well, when is t^2 -35 t + 300 = 0 plain old quadratic t = [ 35 + / - sqrt (1225 - 1200) ]/2 = [ 35 +/- 5 ]/2 = 15 or 20 your profit is negative between 15 units and 20 units I suspect a typo in your problem. It does not make sense to have a profit of 300 for zero units sold.
*Wednesday, March 27, 2013 at 8:05pm*

**college algebra**

P=t^2-35t+300 the profit made when t units are sold t>0, is given by P=t^2-35t+300. Determine the number units to be sold in order for P<0 (a loss is taken). How do I solve this? Thanks for your help.
*Wednesday, March 27, 2013 at 7:49pm*

**college algebra**

Next step: x^2 = 3/16 Now take the square root of both sides (whatever operation you do to one side of an equation you must do to the other side as well): √x^2 = √(3/16) There are two possible solutions: x = - √3/4, √3/4 Substitute both values for x in ...
*Wednesday, March 27, 2013 at 7:33pm*

**college algebra**

Solve the equation. How do you solve a fraction? X^2/3=1/16 Thanks
*Wednesday, March 27, 2013 at 7:25pm*

**college physics**

Correction: V^2 = 102.9.
*Wednesday, March 27, 2013 at 7:13pm*

**college physics**

V^2 = Vo^2 + 2g*d V^2 = 0 + 19.8*(10.5-5.25) V^2 = 1102.9 V = 10.1 m/s.
*Wednesday, March 27, 2013 at 7:10pm*

**10 grade algebra**

please help with this problem Your dad is taking Biology as part of the veterinarian program at the local community college. This semester he will spend a total of 40 hours in the biology lab, and he will take notes in class 6 hours per week. Define a variable for the number ...
*Wednesday, March 27, 2013 at 7:06pm*

**college algebra**

Solve the equation. How do you solve a fraction? X^2/3=1/16 Thanks
*Wednesday, March 27, 2013 at 6:21pm*

**college algebra**

9(x+3)-3(x+3)=2 9x+27+3-9=2 6x-36 6x=48 x=8 Is this right?
*Wednesday, March 27, 2013 at 5:01pm*

**college algebra**

multiply everything by x^2-9, which gives you: -5(x+3)-3(x-3)=2 Have fun!
*Wednesday, March 27, 2013 at 4:23pm*

**college algebra**

Rational equation -5/x-3 - 3/x+3=2/x^2-9 how do I solve?
*Wednesday, March 27, 2013 at 4:14pm*

**Englisj**

1. Which of the following is NOT an example of persuasive writing? a position paper from an elected official a college admissions essay a movie review *a summary of a textbook reading assessment 2. Identify the following as a fact or an opinion: “Video games are too ...
*Wednesday, March 27, 2013 at 1:47pm*

**College Chemistry**

A temperature of 20o C is equivalent to approximately
*Wednesday, March 27, 2013 at 1:25pm*

**College algebra**

by inspection, f(x) = 7x^3+7x - x^2-1 = 7x(x^2+1) - (x^2+1) = (7x-1)(x^2+1) and so on
*Wednesday, March 27, 2013 at 12:26pm*

**College algebra**

Use the rationals theorem to find all the zeros of the polynomial function. Use the zeros to factor f over the real numbers, F(x)=7x^3-x^2+7x-1
*Wednesday, March 27, 2013 at 12:23pm*

**Unknow**

I'm so sorry, Lee, that you don't realize that college is a school. At least most colleges are schools for educating students. What is the name of your college? A fence needs to go around the entire garden. It has two lengths and two widths, right? One length lies ...
*Wednesday, March 27, 2013 at 12:21pm*

**Unknow**

Its not a school subject. its college
*Wednesday, March 27, 2013 at 11:54am*

**College Algebra**

Ok thank you
*Wednesday, March 27, 2013 at 10:33am*

**College Algebra**

if x=a is a real zero. (x-a) is a factor. Divide f(x) by (x-a) and see what the quotient is. Maybe you can factor it, maybe not. In this case, not.
*Wednesday, March 27, 2013 at 10:29am*

**College Algebra**

How do you use the real zeros to factor f?
*Wednesday, March 27, 2013 at 9:58am*

**College Algebra**

Possible rational zeros: ± 1, ± 1/2 f(1) = 2 - 1 + 2 - 1 ≠0 f(-1) = -2 - 1 - 2 - 1 ≠0 f(1/2) = 1/4 - 1/4 + 1-1 = 0 , yeahh, (2x - 1) is a factor Using long division... 2x^3-x^2+2x-1 = (2x - 1)(x^2 + 1) so x = 1/2 or x^2 = -1 x = 1/2 or x = ± i ...
*Wednesday, March 27, 2013 at 9:35am*

**College Algebra**

Use the rational zeros theorem to find all the real zeros of the polynomial function. Use the zeros to factor f over the real numbers. f(x)=2x^3-x^2+2x-1
*Wednesday, March 27, 2013 at 8:15am*

**college algebra**

Squaring both sides 3 x + 7 = ( 3 x + 5 ) ^ 2 3 x + 7 = 9 x ^ 2 + 2 * 3 x * 5 + 5 ^ 2 3 x + 7 = 9 x ^ 2 + 30 x + 25 0 = 9 x ^ 2 + 30 x + 25 - 3 x - 7 9 x ^ 2 + 27 x + 18 = 0 Divide both sides by 9 x ^ 2 + 3 x + 2 = 0 If you don't know how to solve this equation then in ...
*Wednesday, March 27, 2013 at 1:16am*

**college algebra**

√3x+7=3x+5 How do I solve when the answer is -1?
*Wednesday, March 27, 2013 at 1:03am*

**College Gen. Math**

X Qtrs. 6X Dimes. (X+6) Nickels. 25*x + 10*6X + 5*(X+6) = 570. 25x + 60x + 5x+30 = 570 90x = 570-30 = 540 X = 6 Quarters. Amount = 6 * $.25 = $1.50.
*Tuesday, March 26, 2013 at 10:00pm*

**College Algebra! help!**

complex zeros always come in conjugate pairs so if -i is a zero , so is +i if -2+i is a zero, so is -2 - i the zero of -4 comes from the factor (x+4) the zeros of ±i come from (x^ + 1) the zeros of -2 ± i produce (x-(-2+i))(x - (-2-i) ) = (x^2 + 4x + 5) so a ...
*Tuesday, March 26, 2013 at 9:21pm*

**algebra 10th grade**

please help with this problem Your dad is taking Biology as part of the veterinarian program at the local community college. This semester he will spend a total of 40 hours in the biology lab, and he will take notes in class 6 hours per week. Define a variable for the number ...
*Tuesday, March 26, 2013 at 8:41pm*

**College Algebra! help!**

Form a polynomial f(x) with the real coefficients having the given degree and zeros. Degree 5; Zeros: -4; -i; -2+i f(x)=a( )
*Tuesday, March 26, 2013 at 8:23pm*

**College Algebra**

Form a polynomial f(x) with real coefficients having the given degree and zeros. Degree 5; Zeros: -3; -i; -6+i F(x)=a ( )
*Tuesday, March 26, 2013 at 7:14pm*

**College algebra**

Form a polynomial f(x) with the real coefficients having the given degree and zeros. Degree 5; Zeros: -3; -i; -6+i f(x)=a( )
*Tuesday, March 26, 2013 at 6:42pm*

**College algebra**

f(1) = 1-2-13-10 ≠ 0 f(-1) = -1 - 2 + 13 -10 = 0 , so x+1 is a factor by synthetic division x^3 - 2x^2 - 13x - 10 = (x+1)(x^2 - 3x - 10) = (x+1)(x-5)(x+2) = 0 for roots x = -1 or x = -2 or x = 5
*Tuesday, March 26, 2013 at 6:01pm*

**College algebra**

Use the rationals theorem to find all the zeros of the polynomial function. Use the zeros to factor f over the real numbers. f(x)=x^3-2x^2-13x-10 x=
*Tuesday, March 26, 2013 at 5:07pm*

**English**

I don't know what the answer is "supposed" to be, but all of those are potential consequences of plagiarism. I knew a college freshman who inadvertently plagiarized and was suspended from school for a semester. She appealed and that decision was repealed -- but ...
*Tuesday, March 26, 2013 at 4:27pm*

**english**

I don't think any of those answers are correct. In the college where I taught, the first three were used every time a student plagiarized; he/she unfortunately didn't believe plagiarism rules would be enforced. I am not sure what 'cancellation' means here, ...
*Tuesday, March 26, 2013 at 4:25pm*

**College A&PII**

1.plasma osmolarity distilled waters quantity of salutes is 0 and the patients quantity would be 900 at 3L and 300osm/l. making the pre- equilibrium values of plasma: volume-4 Quantity:900 Concentration(mosm/l):225 since concentraion=Quantity/volume.
*Tuesday, March 26, 2013 at 3:34am*

**college physics**

A 30.3-kg child starting from rest slides down a water slide with a vertical height of 10.5 m. (Neglect friction.) (a) What is the child's speed halfway down the slide's vertical distance?
*Monday, March 25, 2013 at 10:54pm*

**Proctology**

Hi, I am an 11th grade student beginning to look into some college options. I am interested in pursuing a career in proctology and have been reading some preliminary books on the topic. Can anyone recommend a college or pre-med program that would offer a strong proctology ...
*Monday, March 25, 2013 at 8:53pm*

**college algebra**

X^4+x^3=16-8x-6x^2 x^4 + x^3 + 6x^2 + 8x - 16 = 0 you must know the factor theorem to do these look at the constant of 16 if there are factors of the type ( ?x + c) , c must be a factor of 16 so try ±1, ±2, ±4, ... that is, try factors of 16 e.g. let x = 1...
*Monday, March 25, 2013 at 8:50pm*

**college algebra**

I'm stuck on 2 problems I know the answers but need to learn to show the work. X^4+x^3=16-8x-6x^2. Answer: -2,1,+-√8 3x^3+4x^2+6=x. (-2,1/3, i√8/3) Please help so I know how to figure these equations out.A big THANKS
*Monday, March 25, 2013 at 7:53pm*

**College algebra**

recall that complex roots come in conjugate pairs, so the complete factorization is (x-5)(x+i)(x-i)(x-(-9+i))(x-(-9-i)) (x-5)(x^2+1)((x+9)-i)((x+9)-i) (x-5)(x^2+1)((x+9)^2+1) (x-5)(x^2+1)(x^2+18x+82) x^5+13x^4-7x^3-397x^2-8x-410
*Monday, March 25, 2013 at 3:06pm*

**psychology**

It seems like you are looking to correlate sleep times to reaction times. If you will actually be doing the experiment rather than just proposing one, it might be convenient to choose college peers. (I am assuming you are in college.) You might want to do a pilot study with ...
*Monday, March 25, 2013 at 2:37pm*

**College algebra**

Form a polynomial f(x) with real coefficents having the given degree and zeros degree 5; zeros: 5; -i; -9 +i f(x)=a
*Monday, March 25, 2013 at 1:49pm*

**College Gen. Math**

There are 6 times as many dimes as quarters, and 6 times more nickels than quarters. If you have $5.70, how much money do you have in quarters?
*Monday, March 25, 2013 at 12:06pm*

**College Physics**

A child's toy consists of a toy car of mass 0.100kg which is able to roll without friction on the loop-the-loop track shown. The car is accelerated from rest by pushing it with force F over a distance d, then the car slides with a constant velocity until it encounters the ...
*Sunday, March 24, 2013 at 10:36pm*

**College algebra**

Find the vertical, horizontal, and qblique asymptotes, if any, for the following rational function. T(x)=x^2/x^4-256
*Sunday, March 24, 2013 at 9:34pm*

**college algebra**

b(x) = x^3/(5x^3 - x^2 - 22x) = x^2/(5x^2 - x - 22) , after dividing by x , x≠0 f'(x) = (2x(5x^2 - x - 22) - x^2(10x - 1) )/(5x^2-x-22)^2 to have a vertical tangent, the slope must be undefined, that is the denominator of the above f'(x) must be zero 5x^2 - x - ...
*Sunday, March 24, 2013 at 8:32pm*

**college algebra **

determine the vertical asymptotes of the graph of function.g(x)=x^3 diveded by 5x^3-x^2-22x
*Sunday, March 24, 2013 at 8:22pm*

**MA 107 college algebra**

(3^2)^5 = 3^10 = 59049
*Sunday, March 24, 2013 at 8:14pm*

**MA 107 college algebra**

Factor any difference of two squares, or state that the polynomial is prime. Assume any variable exponents represent whole numbers. 2 - 36 X
*Sunday, March 24, 2013 at 7:41pm*

**MA 107 college algebra**

Simplify the expression using the power rule.(3to the power of 2)to the power of 5
*Sunday, March 24, 2013 at 7:38pm*

**MA 107 college?? algebra**

√81 = 9 9 - 2 = 7
*Sunday, March 24, 2013 at 7:36pm*

**MA 107 college algebra**

Each side of a square is lengthened by 2 inches. The area of this new, larger square is 81 square inches. Find the length of a side of the original square.
*Sunday, March 24, 2013 at 7:34pm*

**College Algerbra**

You're very welcome, Eric.
*Sunday, March 24, 2013 at 5:16pm*

**College Algerbra**

Thank You so much for your invaluable help and patience with walking me through these problems Ms. Sue, I hope you have a great day!
*Sunday, March 24, 2013 at 5:11pm*

**College Algerbra**

Thanks!
*Sunday, March 24, 2013 at 5:08pm*

**college math**

number of ways = C(9,2) x C(39,3) = 36(9139) = .... number of committees without restrictions = C(48,5) = 1712304
*Sunday, March 24, 2013 at 5:07pm*

**College Algerbra**

yes
*Sunday, March 24, 2013 at 5:04pm*

**College Algerbra**

I know right? I almost did not pass my ability to benefit test to get into Barstow College my math skills were so bad. So would the answer be x<_-1.4?
*Sunday, March 24, 2013 at 5:01pm*

**college math **

How many different committees can be formed from 9 teachers and 39 students if the committee consists of 2 teachers and 3 students? In how many ways can the committee of 5 members be selected?
*Sunday, March 24, 2013 at 4:54pm*

**College Algerbra**

Sorry Mr. Reiny, I guess I should of figured that out since you are so smart at doing the math problems. I do not have an option key on my windows 7 keyboard but I bet there is another way I can do the underline thing. Thanks Again for taking time out of your day to help us ...
*Sunday, March 24, 2013 at 4:54pm*

**College Algerbra**

C = 5/9 (-21) I subtracted 32 from 11 (the degrees F). C = -105/9 I multiplied 5/9 times -21 C = -11.67 I divided the numerator by the denominator When the temperature is 77 degrees F, it is 25 degrees C. Work with the formula until you get 25 degrees C.
*Sunday, March 24, 2013 at 4:47pm*

**College Algerbra**

I am sorry, but I find it extremely odd that you call these questions "College Algebra" and you don't know what 7 ÷ 5 is . What "college" are you attending ?
*Sunday, March 24, 2013 at 4:45pm*

**College Algerbra**

I answer most of the questions on a Mac, where I hold down the "option" key as I press the < There are combinations of key like that on the PC also, I don't have the list handy right now. BTW, I am an old retired guy, not a woman.
*Sunday, March 24, 2013 at 4:42pm*

**College Algerbra**

I don't know, -35? I stink at math and all of it's many steps.
*Sunday, March 24, 2013 at 4:40pm*

**College Algerbra**

Thanks Reiny, you assumed correct, how did you get the line under the greater than sign? You are a very smart and kind woman to have been such a great help, Thanks!
*Sunday, March 24, 2013 at 4:36pm*

**College Algerbra**

So I did what you said but I am not sure how you got to C= 5/9(-21) to C=105/9 So on mine C=(5/9)(77-32) I got C=5/9(-45) I am unsure how you did the math to come to your C=-105/9 answer and then the C=11.67 answer. Please show me those last steps if you do not mind, Thanks ...
*Sunday, March 24, 2013 at 4:29pm*

**College Algerbra**

well, what is -7/5 ??
*Sunday, March 24, 2013 at 4:23pm*

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