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April 17, 2014

April 17, 2014

Post a New Question | Current Questions

**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*

**College Algerbra**

looking at all those positive numbers on the left, there is no way the inequality sign could have changed. I am assuming your _ < is ≤ ?? .1(.1x + .1) < -.8 times 10 .1x + .1 ≤ -8 times 10 again x + 1 < -80 x≤ -81
*Sunday, March 24, 2013 at 4:21pm*

**College Algerbra**

I got the answer x >_ -81, is that correct?
*Sunday, March 24, 2013 at 4:07pm*

**College Algerbra**

I tried that and I came up with x< -1.4, is that correct?
*Sunday, March 24, 2013 at 4:03pm*

**College Algerbra**

Use the same method I used, except substitute 77 for 11.
*Sunday, March 24, 2013 at 3:45pm*

**College Algerbra**

Hint: multiply both sides by 10 and proceed like I showed you in the last one
*Sunday, March 24, 2013 at 3:40pm*

**College Algerbra**

multiply each term by 7 to get of fractions -5x - 14 ≥ -7 -5x ≥ 7 x ≤ -7/5
*Sunday, March 24, 2013 at 3:39pm*

**College Algerbra**

THE TEMPERATURE ON A SUMMER DAY IS 77 DEGREES FAHRENHEIT.the formula to convert the temperature to degrees Celsius is C = 5/9(F-32) what is the corresponding temperature in degrees Celsius? Sorry Ms. Sue I cut of the top of the screenshot, it is 77 degrees Fahrenheit.
*Sunday, March 24, 2013 at 3:39pm*

**College Algerbra**

Solve the inequality. 0.1(0.1x+0.1) _< -0.8
*Sunday, March 24, 2013 at 3:24pm*

**College Algerbra**

Solve the inequality. - 5x / 7 -2>-1
*Sunday, March 24, 2013 at 3:20pm*

**College Algerbra**

C = 5/9(F-32) C = (5/9) (11 - 32) C = 5/9 (-21) C = -105/9 C = 11.67
*Sunday, March 24, 2013 at 3:19pm*

**College Algerbra**

THE TEMPERATURE ON A SUMMER DAY IS // DEGREES FAHRENHEIT.the formula to convert the temperature to degrees Celsius is C = 5/9(F-32) what is the corresponding temperature in degrees Celsius?
*Sunday, March 24, 2013 at 3:10pm*

**math**

Mark averaged 60 miles per hour during the 30-mile trip to college. Because of heavy traffic he was able to average only 40 miles per hour during the return trip. What was Mark's average speed for the round trip?
*Sunday, March 24, 2013 at 2:37pm*

**chemistry 2 college**

% by mass? 10% means 10 g solute in 100 g solution. That's 10 g solute in (10g solute+90 g solvent) 0.1 = (xsolute)/(xsolute + 50g solvent) Solve for x.
*Sunday, March 24, 2013 at 2:04pm*

**chemistry 2 college**

explain how to find the mass of solute in the solution: 50.0g of solvent in a 10.0% NaCl solution?
*Sunday, March 24, 2013 at 12:25pm*

**college algebra**

the width is 320-x, so a = x(320-x)
*Sunday, March 24, 2013 at 5:18am*

**college algebra**

each side is now 10-2x, and the height is x v = x(10-2x)^2
*Sunday, March 24, 2013 at 5:17am*

**college algebra**

let the side of the cut-out square be x inches base is 10-2x by 10-2x, and the height is x Volume = x(10-2x)^2 , where x > 5 , or else the base is negative.
*Saturday, March 23, 2013 at 8:46pm*

**college algebra**

Vertex is -b/2a ax^2+by+c=0 or (x2-x1)/(y2-y1)
*Saturday, March 23, 2013 at 7:50pm*

**college algebra**

A rectangular box with no top is to be constructed from a 10 in. x 10 in square piece of cardboard by cutting equal square of side x from each corner and then bending up the sides. Write the volume of the box as a function of x.
*Saturday, March 23, 2013 at 6:00pm*

**college algebra**

A rectangular box with no top is to be constructed from a 10 in. x 10 in square piece of cardboard by cutting equal square of side x from each corner and then bending up the sides. Write the volume of the box as a function of x.
*Saturday, March 23, 2013 at 5:31pm*

**college algebra**

A roll of 640 feet of chicken wire is used to enclose a rectangular vegetable garden.Express the area A of the garden in terms of its length (x)
*Saturday, March 23, 2013 at 5:19pm*

**college algebra**

A rectangular box with no top is to be constructed from a 10 in. x 10 in square piece of cardboard by cutting equal square of side x from each corner and then bending up the sides. Write the volume of the box as a function of x.
*Saturday, March 23, 2013 at 4:58pm*

**College??? math**

4.5/6 = 8/x Cross multiply and solve for x. 4.5x = 48 x = 10 2/3 cup
*Saturday, March 23, 2013 at 4:55pm*

**college algebra**

A roll of 640 feet of chicken wire is used to enclose a rectangular vegetable garden.Express the area A of the garden in terms of its length (x)
*Saturday, March 23, 2013 at 4:42pm*

**College math**

Rebekah's recipe for 41/2 dozen cookies call for 6 cups of sugar. How many cups of sugar are needed to make 8 dozen cookies?
*Saturday, March 23, 2013 at 4:23pm*

**can some1 plz recheck my answers**

1.is B. It has a specific goal to accomplish: earning college degree. C is the beginning of a goal: working on research paper, but doesn't say paper will be completed, therefore it's not specific goal. 2.I agree that it is C. 3. is C. Although, the other 3 answers are ...
*Saturday, March 23, 2013 at 9:48am*

**psychology**

2. Last week, Roger suddenly quit his job. He told his family he had decided to learn carpentry. He purchased a truckload of wood and nails, which now sits in his driveway because he changed his mind and decided to enroll in a school for massage therapy. The school confirms ...
*Friday, March 22, 2013 at 9:21am*

**college**

A solid is known to be either BaCO3 or CaCO3. It is dissolved in 6 M acetic acid. A pale yellow precipitate forms when K2CrO4 solution is added. The subsequent flame test with that precipitate shows an orange-red color. Which cation is present? Briefly explain
*Friday, March 22, 2013 at 12:28am*

**college stats**

Z = (score-mean)/SD Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportions/probabilities related to the Z scores.
*Thursday, March 21, 2013 at 12:55pm*

**college algebra**

evaluate f(x) at x = -1 f(-1) = -1+4+2-3 = 2 it's not zero, so (x+1) is not a factor of f(x)
*Thursday, March 21, 2013 at 12:36pm*

**college algebra**

x^3+4x^2-2x-3 ; x+1 factor theorum to decide whether or not second polynomial is a factor of the first.
*Thursday, March 21, 2013 at 8:01am*

**college stats**

iN manoa Valley on the island of Oahu Hawaii the annual rainfall averages 43.6 inches with a standard diviation 7.5 inches. for a given year, find the probability that the annual rainfall will be..(solve for a,b,and c) show work a)more than 53 inches b)less than 28 inches c)...
*Thursday, March 21, 2013 at 12:49am*

**College Chemistry**

1927
*Wednesday, March 20, 2013 at 10:02pm*

**College Math**

substitution is a method, not a problem (though it appears to be a problem for you! :-) taking the first equation, solve for x or y: x = (16+3y)/2 now "substitute" that into the other equation 5(16+3y)/2 + 2y = 21 80+15y + 4y = 42 19y = -38 y = -2 so, x = (16-6)/2 = ...
*Wednesday, March 20, 2013 at 11:50am*

**college- find domain and range**

Looks good, except that the domain and range probably should be a closed intervals (<= rather than <) I guess that depends on how you interpret "between"
*Wednesday, March 20, 2013 at 11:46am*

**College Math**

I need help solving these problems by using the substitution problem 2x-3y=16 5x+2y=21
*Wednesday, March 20, 2013 at 11:28am*

**college- find domain and range**

y= X^2 + X - 500/10 and y is the number of milliliters of fuel consumed per second and X is the speed of the engine in revolutions per minute. If the engine operates between 100 revolutions per minute and 400 revolutions per minute what is the domain and range Is this correct...
*Wednesday, March 20, 2013 at 11:12am*

**college physics**

would it just be 4.20N??
*Wednesday, March 20, 2013 at 1:32am*

**college physics**

If the initial tension in the string is (2.10+/- 0.02)N, what is the tension that would double the wave speed?
*Wednesday, March 20, 2013 at 1:28am*

**college chemistry**

I bet if it didn't have the density, it had the specific gravity. You can use that to determine the density.
*Tuesday, March 19, 2013 at 10:02pm*

**college chemistry**

for my lab i used 2.0mL of NaOH solution and it doesnt have a density in (g/mL)... is there still a way to calculate the moles to it? unless there is a density to NaOH
*Tuesday, March 19, 2013 at 9:33pm*

**English**

Please help with this question that has been bothering me! I take bio college class and we have graduate/student assistant for labs & when taking an exam. The professor is never there during those sections.Due to my low exam results,I feel I'm not being graded on fairly ...
*Tuesday, March 19, 2013 at 8:36pm*

**college physics**

Ep = mg*h = 230*9.8*125 = 281,750 Joules Ek = Ep = 281,750 Joules. V^2 = Vo^2 + 2g*h V^2 = 0 + 19.6*125 = 2450 V = 49.5 m/s.
*Tuesday, March 19, 2013 at 12:27pm*

**Arithmetic**

A box in a college bookstore contains books, and each book in the box is a history book, an English book or a science book. If one-third of these books are history books and one-sixth are English books, what fraction of the books are science books? A. 1/3 B. 1/2 C. 2/3 D. 3/4...
*Tuesday, March 19, 2013 at 10:24am*

**Arithmetic**

A box in a college bookstore contains books, and each book in the box is a history book, an English book or a science book. If one-third of these books are history books and one-sixth are English books, what fraction of the books are science books?
*Tuesday, March 19, 2013 at 10:23am*

**college physics**

Archimedes's principle states that the upward buoyant force exerted on a body immersed in a fluid is equal to the weight of the fluid the body displaces. In this case. 2.8 cc of water is displaced and its weight 2.8 g. Hence the net buoyant force = 2.8 gf Now the density ...
*Tuesday, March 19, 2013 at 3:53am*

**college algebra**

There are two equations there. In the first one, let y = x^2 and solve the quadratic. 9y^2 -13y +4 = 0 (y -1)(9y-4) = 0 y = 1 or 4/9 x = sqrt(y) = +/-1 and +/-2/3 In the second one, let y = x^3 and again solve the quadratic.
*Tuesday, March 19, 2013 at 3:02am*

**college algebra**

I am solving the first one.....second one you can try yourself. so 9x^4+4=13x^2 this can be written, x^2*(9x^2-13)=-4 as x^2 is always +ve so to be -ve, (9x^2-13)<0 we see that -(sqrt(13)/3)<x<(sqrt(13)/3) it comes as -1.2<x<1.2 next we will see if there is some...
*Tuesday, March 19, 2013 at 2:54am*

**college algebra**

Solve, what is the easiest way to solve this equation? 9x^4+4=13x^2 and x^6-19x^3=216 Thanks, in advance..
*Tuesday, March 19, 2013 at 12:08am*

**college physics**

fn=(n/2L)v It is a direct relationship. If v increases by a factor of 100, fn increases by the same factor.
*Monday, March 18, 2013 at 11:06pm*

**college physics**

for the resonance frequencies: fn=nv/2L If the speed (v) doubles my fn will also doubles ? why?
*Monday, March 18, 2013 at 10:03pm*

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