Sunday

April 20, 2014

April 20, 2014

Number of results: 89,110

**Pre-calculus-check answers**

1) I got a remainder of 5, check your work 2) correct
*Saturday, August 23, 2008 at 1:47pm by Reiny*

**Pre-Calculus-check answers**

correct.
*Saturday, October 11, 2008 at 2:10pm by bobpursley*

**Pre-calculus-check answers**

bewbs
*Saturday, August 23, 2008 at 2:15pm by Anonymous*

**Pre-Calculus-check answers**

Which of the following results in the graph of f(x)=x^2 being expanded vertically by a factor of 3 and reflected over the x-axis? a) f(x)= (1/3)x^2 b) f(x)= -3x^2 c) f(x)= (-1/x^2)+3 d) f(x)=(-1/3)x^2 Answer: d Thanks for checking my answers
*Sunday, August 10, 2008 at 12:26pm by Lucy*

**Pre-calculus-check answers**

both correct
*Saturday, August 23, 2008 at 1:41pm by Reiny*

**Pre-Calculus-check answers**

then the book is wrong
*Saturday, August 30, 2008 at 8:38pm by Reiny*

**Pre-Calculus-check answers**

75*32
*Saturday, October 11, 2008 at 2:03pm by Anonymous*

**Pre-calculus-check answers**

I am not familiar with the notation [g x f](x) 2) is correct
*Saturday, August 23, 2008 at 1:37pm by Reiny*

**Pre Calculus 1**

make sure to check your answers, since x > 0
*Tuesday, March 29, 2011 at 7:50pm by Reiny*

**Pre-Calculus-check answers**

Oops, forgot to mention that the answer for problem 2 is d.
*Sunday, August 10, 2008 at 12:22pm by Lucy*

**Pre-Calculus-check answers**

correct, except for the missing PI in the frequency term.
*Saturday, August 30, 2008 at 6:31pm by bobpursley*

**Pre-Calculus-check answers**

I am not surprised as I have found many errors thus far. Thanks for helping
*Saturday, August 30, 2008 at 8:38pm by Lucy*

**Pre-Calculus-check answers**

I double checked my typing on the first problem and everything was entered correctly.
*Saturday, August 30, 2008 at 8:38pm by Lucy*

**Pre-Calculus-check answers**

Write the equation of the circle that passes through the point (3,4) and has its center at (1,2). Answer: (x-1)^2 +(y-2)^2 = 8 Thanks for the help.
*Saturday, October 11, 2008 at 2:10pm by Lucy*

**Pre-Calculus-check answers**

I agree about the sign change but your answer d makes the graph shorter, not taller. I think b)
*Sunday, August 10, 2008 at 12:26pm by Damon*

**Pre-Calculus-check answers**

Oops---left the "x" off of 12 Should read: f(x)=6+x^4+2x^2-5x^3-12x Sorry
*Sunday, August 31, 2008 at 11:47am by Lucy*

**Pre-calculus-check answers**

which of the following results is the graph of f(x)=x^2 being expanded vertically by factor of 3 and reflected over the x-axis
*Saturday, August 23, 2008 at 1:47pm by Anonymous*

**Pre-Calculus-check answers**

Use a sum or difference identity to find the exact value of sin 255 degrees Answer: sqrt6-sqrt2/4 Thanks
*Saturday, August 30, 2008 at 10:10pm by Lucy*

**Pre-Calculus-check answer**

Yes, all of those answers work. You can prove that by substitution. You can also derive it by substituting 3/x for y in the first equation. x^2 + 9/x^2 = 10 x^4 - 10x^2 +9 = 0 (x^2-9)(x^2 - 1) = 0 (x+3)(x-3)(x+1)(x-1) = 0
*Sunday, October 12, 2008 at 10:05pm by drwls*

**Pre-Calculus check answers**

How does statistics relate to algebra and specifically to linear equations and linear programming?
*Sunday, August 31, 2008 at 11:46am by boisetta Jacobs*

**Pre-Calculus-check answers**

in y=-4tan(1/2x + 3pi/8) y = -4 tan (1/2)[x + 3pi/4] so the period is 2pi/(1/2) = 4pi which is none of your choices. Did you type your questions or answers correctly?? the phase shift would be 3pi/4 radians to the left. 2) the inverse of y = cos x+3 is x = cos y+3 then cos y...
*Saturday, August 30, 2008 at 8:38pm by Reiny*

**Pre-calculus-check answers**

your first one would be (x+3i)(x-3i)(x-i)(x+i) which is what you had, but then =(x^2 - 9i^2)(x^2 - i^2) remember i^2 = -1 = (x^2 + 9)(x^2 + 1) = .... you can finish that your second question is correct
*Saturday, August 23, 2008 at 1:32pm by Reiny*

**Pre-Calculus-check answers**

Find the degree measure of the central angle whose intercepted arc measures 8cm in a circle of radius 15cm. Answer: -401.07 degrees
*Saturday, October 11, 2008 at 5:09pm by Lucy*

**Pre-Calculus-check answers**

Write an equation of the tangent function with period 3pi/8, phase shift -pi/5, and vertical shift -2. Answer: y=tan(8x/3 - 8pi/15)-2 Thanks
*Saturday, August 30, 2008 at 6:31pm by Lucy*

**Pre-Calculus-check answers**

I suspected as much :) Your first function appears to have two zeros, but both are for positive X (approx. 0.5 and 5.0). The second one appears to have a couple of zeros somewhere around -1.4 and +1.4: would you like to check that out? (That's just from a quick sketch of the ...
*Sunday, August 31, 2008 at 11:47am by David Q*

**Math Help? Check my answers.**

Simplify 6 x 3 divide 3 - 1. Pre-Algebra? Answers: 2 3 5 6 My answer: 5
*Tuesday, August 20, 2013 at 1:25pm by Katherine*

**Pre-Calculus-check answers**

1) I agree 2) Your answer is OK, but these are not geometric means. They are three numbers in a geometric progression. Another possible answer would be -2, -2 sqrt2, -4.
*Saturday, September 13, 2008 at 4:12pm by drwls*

**Pre-calculus-check answers**

Choose the statement that is true for the graph f(x) =x^3-12x. Answer: f(x) decreases for x >-2 2) Which type of critical point, if any, is present in the graph of f(x)=(x-4)^5+1 Answer: none
*Saturday, August 23, 2008 at 2:15pm by Lucy*

**Pre-calculus**

Looks like calculus not pre-calculus to me by the way. I do not see how to do it without taking the derivative.
*Tuesday, November 27, 2012 at 6:01pm by Damon*

**Pre-Calculus-check answers**

not quite if x+iy = r e^iT = r (cos T i sin T) then r = sqrt (x^2+y^2) not sqrt [x^2 + (iy)^2] so r = sqrt (29), not 21
*Saturday, September 13, 2008 at 4:09pm by Damon*

**pre-algebra**

Check the answers to your last two posts. The websites shows exactly how to do it. We'll be glad to check your answer.
*Thursday, January 13, 2011 at 9:27pm by Ms. Sue*

**Pre-calculus-check answers**

If f(x)=4x^2 and g(x)=2/x, find [g x f](x). Answer: -1/2x^2 2) Are f(x)=1/2x+5 and g(x)=2x-5 inverses of each other? Answer: no
*Saturday, August 23, 2008 at 1:37pm by Lucy*

**pre-calculus**

but the answers are 0,-2,2
*Tuesday, February 5, 2013 at 8:48pm by suie*

**Pre-Calculus/Calculus**

I am too embarassed to ask this Calculus (really pre-calculus) question in tutoring, because I know I should know. Is the inverse of f(x)=3x-1 actually f(x)=1/3x+1? How do I find it? What if it asks the same equation replaced with f to the -1 power (x)? I think I know how the ...
*Tuesday, July 1, 2008 at 10:38pm by Molly*

**pre-calculus**

well i didn't want to post the answers because someone could easily choose an answer choice. i just wanted to compare reiny's answer to the answer i'd already gotten. i wanted to double check from a credible source.
*Friday, October 3, 2008 at 9:28pm by aelisha*

**CALCULUS. Check my answers, please! :)**

Thank you!! Unfortunately I couldn't wait for your response, but I went over my answers before checking to see if they were right, and I got them all right! Thank you so much for your help! It means the world to me, and will count on you if I need help on more topics in ...
*Saturday, October 5, 2013 at 12:24pm by Samantha*

**Pre-calculus-check answers**

Write the slope-intercept form of the equation of the line that passes through the point (-5,4)and has a slope of -1. Answer: y=-x-1 2)Solve the system of equations algebraically: 1/3x+1/3y=1 and 2x+2y=9 Answer: no solution
*Saturday, August 23, 2008 at 1:41pm by Lucy*

**Pre-calculus-chck answers**

correct, of course.
*Tuesday, August 26, 2008 at 4:02pm by bobpursley*

**pre-calculus**

are u sure b/c the answers are from the book
*Tuesday, February 5, 2013 at 8:48pm by suie*

**Pre-calculus-check answers**

1) df/dx = 3x^2 -12 = 2(x+2)(x-2) There are critical points (where the derivative is zero) at x = +2 and -2. x=2 is a relative minimum. f(x) increases (when x increases) for x > +2 and decreases for -2 < x < 2 2) That equation has an absolute minimum at x = 4.
*Saturday, August 23, 2008 at 2:15pm by drwls*

**Pre-Calculus-check answers**

Find the sixth term in the geometric sequence: sqrt3y^3, -3y^5, 3sqrt3y^7 Answer: -27y^13 2) Find three geometric means between -sqrt2 and -4sqrt2. Answer: -2, 2sqrt2, -4 Thanks
*Saturday, September 13, 2008 at 4:12pm by Lucy*

**Pre-Calculus**

Could someone check my answers? 27. (16/9)^2/3 = 64/27 28. (49/25)^3/2 = 343/125 31. (-64)^2/3 = 8 32. (-8)^-4/3 = 1/16 or -1/16
*Monday, April 22, 2013 at 10:55pm by Caroline*

**Pre-calculus-check answer**

yes
*Saturday, August 23, 2008 at 2:36pm by Reiny*

**Pre-Algebra**

I'll be glad to check your answers.
*Monday, November 26, 2012 at 3:38pm by Ms. Sue*

**pre calculus**

You need to write out the question. I have no idea what "pre calculus" this could be, maybe zeroes, however, that is standard fare for an algebra course.
*Tuesday, December 10, 2013 at 6:26pm by bobpursley*

**pre calculus**

You need to write out the question. I have no idea what "pre calculus" this could be, maybe zeroes, however, that is standard fare for an algebra course.
*Tuesday, December 10, 2013 at 6:26pm by bobpursley*

**Pre Calculus**

Pre Calculus why is sin(-20)/cos 380 equal to tan (-200)
*Sunday, November 15, 2009 at 10:07pm by Pre Calculus*

**pre-calculus**

Also with calculator, graph f(x), and determine all the possible maxima/minima coordinates to within two decimal points. f(x)=x^3+2x^2-x-2/x^2+x-6 i did this and got my answers but i doubt they are right, can anyone get the answers if you have a TI-83-84 please? thank you.
*Saturday, March 13, 2010 at 9:46pm by Paris*

**CALCULUS - Check my answers :)**

Well Damon, calculus isnt supposed to be.. interesting. Haha
*Thursday, December 19, 2013 at 7:18pm by mathidislikeperson*

**Pre-calculus-check answers**

Name all the values of x that are not in the domain of f(x)=2-x^2/x+5. Answer: x= -5 2)Find the minimum value of f(x,y)=2x-y+2 for the polygonal convex set determined by this system of inequalities: x >/= 1, x </= 3, y</=0, 1/2x+y</=5 Answer: -0.5
*Saturday, August 23, 2008 at 1:57pm by Lucy*

**Pre-Calculus-check answers**

Name all the values of x that are not in the domain of f(x)=2-x^2/x+5. Answer: x= -5 2)Find the minimum value of f(x,y)=2x-y+2 for the polygonal convex set determined by this system of inequalities: x >/= 1, x </= 3, y</=0, 1/2x+y</=5 Answer: -0.5
*Saturday, August 30, 2008 at 11:19am by Lucy*

**Pre-Calculus**

yeah part exams library go there Pre-Calculus exam
*Thursday, October 29, 2009 at 7:46pm by stephanie*

**PRE-CALCULUS**

THIS IS FOR ALGEBRA/PRE-CALCULUS MATH. I POSTED IT JUST AS THE TEACHER WROTE IT.
*Tuesday, September 13, 2011 at 10:41pm by aLVIN*

**Calculus, please check my answers!**

Thank you so much for not only verifying my answers, but also for your great explanations! I really appreciate it! :)
*Monday, October 7, 2013 at 10:18am by Samantha*

**Pre calculus**

use f(x)= { x^2 +5 if x ≤ 1 { -x^2+4x+3 if x>1 to find the answers to the following: 1. f(2) 2. f(4)-f(-2)
*Thursday, October 14, 2010 at 6:38pm by Amy*

**Pre-Calculus**

It is obvious she is wrong. the whole circumference of a 6cm circle is 12pi or about 36 cm 3cm is about 1/12 of the whole, or 1/12 of 360° = 30° she obviously confused the formula. ALWAYS do a general sanity check on your answers. Just because you get a value doesn't mean that...
*Tuesday, November 6, 2012 at 8:14pm by Steve*

**Pre-Calculus**

I am in Honors Pre-Calculus and am having a hard time understanding my teacher. I feel so stupid. Does anyone have any suggestions on a website that might give me some insight into what I am doing wrong? Thanks!
*Tuesday, October 7, 2008 at 4:23pm by Jill*

**Pre-calculus-check answers**

Use the Remainder Theorem to find the remainder of (x^3-5x^2+7x+3)/(x-2). State whether the binomial is a factor of the polynomial. Answer: Remainder = 1, not a factor 2) Determine the slant asympotte for f(x)=(x^2-5x-3)/x Answer: y=x+5
*Saturday, August 23, 2008 at 1:47pm by Lucy*

**Pre-calculus-check answers**

Find the number of possible negative real zeros for f(x)=6+x^4+2x^2-5x^3-12. Answer: 0 2) Approximate the real zeros of f(x)=2x^4-3x^2-2 to the nearest tenth. Answer: no real roots
*Saturday, August 23, 2008 at 2:33pm by Lucy*

**Pre-Calculus-check answers**

Find the number of possible negative real zeros for f(x)=6+x^4+2x^2-5x^3-12. Answer: 0 2) Approximate the real zeros of f(x)=2x^4-3x^2-2 to the nearest tenth. Answer: no real roots
*Saturday, August 30, 2008 at 11:15am by Lucy*

**Pre-Calculus-check answers**

Find the number of possible negative real zeros for f(x)=6+x^4+2x^2-5x^3-12. Answer: 0 2) Approximate the real zeros of f(x)=2x^4-3x^2-2 to the nearest tenth. Answer: no real roots
*Sunday, August 31, 2008 at 11:47am by Lucy*

**pre-calculus-check over work**

all correct.
*Monday, April 21, 2008 at 10:21am by bobpursley*

**Pre-Calculus-check answers**

1) cosθ=0.8 , θ is in fourth quadrant θ= cos^(-1)0.8=36.86989765 + 270=306.87 so , sin 2θ= sin2(306.87)= -0.96 answer : a
*Sunday, August 31, 2008 at 12:03am by Mohamed*

**Pre-Calculus/Trig Check please and help**

correc, typo. -3x^2
*Monday, September 5, 2011 at 8:52am by bobpursley*

**Pre-Calculus-check answers**

The first function takes the value zero at approximately X= -0.9 and again at around 4.63, with a minimum value between them somewhere around 3.46; also has a gradient of zero at X=0. Are you sure the equation is correctly written down, given that it's apparently got two ...
*Sunday, August 31, 2008 at 11:47am by David Q*

**Pre Calculus 12**

Oh but this is a multiple choice question and the only answers that it can be are A 144 B 72 C 24 D 1728
*Friday, January 25, 2013 at 12:43am by Shreya*

**pre calculus**

Pre-Calculus? I wonder what the question is. In a basic algebra course, you would be looking for zeroes, and probably get those by factoring. 2x^2+11x-21=0 (2x-3)(x+7)=0 x= 1.5, or x=-7
*Tuesday, December 10, 2013 at 12:39pm by bobpursley*

**Pre-Calculus-check answers**

1. the 3 seniors can be chosen i C(6,3) ways, which is 20 that leaves 2 juniors to be choses from the 4 juniors, which is 6 so the number of ways is 20x6 or 120 ways 2. there are 4 ways to get a 5, (1,4),(2,3),(3,2), and (4,1) so prob of a 5 = 4/36 = 1/9 similarly there are 5 ...
*Saturday, October 11, 2008 at 2:03pm by Reiny*

**Pre-algebra**

Your assignment is to define and explain in your own words. We'll be glad to check your answers.
*Saturday, May 21, 2011 at 1:01pm by Ms. Sue*

**Pre-calculus-ck answers**

Neither one of these is the general form that I know of. In the second, the center is wrong, I didn't go past that.
*Tuesday, September 30, 2008 at 3:41pm by bobpursley*

**Pre-Calculus**

Pre-Calculus? That is a nasty equation. We might use Newton's Method, but that would be Calculus. I tried some "trial and erro" and got x = appr .371 using 2 decimals 4 sin .37 = 1.44646 e^.37 = 1.4477 I am curious what method was suggested that you should use.
*Friday, March 29, 2013 at 10:30pm by Reiny*

**pre-calculus**

pre-calculus and i didn't understand where the d and cos came from
*Thursday, September 29, 2011 at 10:44pm by tatiana*

**math**

Are you doing pre-calculus or calculus? In calculus, the maximum is obtained by setting f'(t)=derivative with respect to t = 0 and solving for t. In pre-calculus, you can transform the expression by completing the squares. Ax² + Bx + C =A(x²+ (B/A)x + C/A) =A((x + (B...
*Tuesday, September 8, 2009 at 10:22pm by MathMate*

**Pre-Calculus**

h/225= tangent 49.5deg If I understand the picture correctly, check me. solve for h.
*Wednesday, March 24, 2010 at 8:42pm by bobpursley*

**Pre-Algebra**

Why nobody wants to help me just check my answer and there if some of the answers are wrong then tell me the right ones !!! !!!!!!!!!!!! :-( :
*Wednesday, March 13, 2013 at 3:36pm by Selena *

**Pre-Calculus-check answers**

2) csc Ø = -5/3, then sin Ø = -3/5 and is in III the cos Ø = -4/5 so tan 2Ø = sin 2Ø/cos 2Ø = 2sinØcosØ/(cos^2 Ø - sin^2 Ø) =2(-3/5)(-4/5)/(16/25 - 9/25) = 24/7
*Sunday, August 31, 2008 at 12:03am by Reiny*

**Grade 12 Calculus**

you don't need calculus for this. It can just confirm your answers. these are just ordinary parabolas. Find the vertex, and check the values at the ends of the intervals.
*Tuesday, April 16, 2013 at 12:15pm by Steve*

**calculus**

Find the distance from (3,7,-5) to each of the following. a. the xy-plane b. the yz-plane c. the xz-plane d. the x-axis e. the y-axis f. the z-axis **I just wanna check my answers because I didn't really understand it when the teacher was explaining it and it's an even ...
*Saturday, April 7, 2007 at 2:17am by jean*

**pre-calculus**

I did this already, but left a few steps for you to finish. Check the previous post of the same question
*Friday, March 7, 2008 at 7:47am by drwls*

**Pre-calculus-chck answers**

Determine the value of w so that the line whose equation is 5x-2y=-w passes through the point at (-1,3). Answer: w=11
*Tuesday, August 26, 2008 at 4:02pm by Lucy*

**pre-calculus**

Could you post your answers if you need a confirmation? Also, calculate f'(x) and substitute the x-coordinate of the maximum/minimum to see if f'(x)=0. This will be another way to confirm your answer.
*Saturday, March 13, 2010 at 9:46pm by MathMate*

**Pre-Calculus**

The answers in the back of my book are pi/3,pi, and 5pi/3
*Sunday, April 20, 2008 at 11:03pm by Sharon*

**Pre-Calculus**

Go back and check your volleyball question. I just saw it and you missed the angle of launch in your equations.
*Monday, March 3, 2014 at 6:15pm by Damon*

**Pre-Calculus-check answers**

How many ways can 5 students be chosen from a group of 4 juniors and 6 seniors to be on the prom committee if exactly 3 students must be seniors? Answer: 5400 Find the probability of getting a sum of 5 on the first toss of two number cubes and a sum of 6 on the second toss. ...
*Saturday, October 11, 2008 at 2:03pm by Lucy*

**calculus (check my work please)**

Try to simplify your "different answers". Probably your "different answers" is same solutions write in different form.
*Thursday, June 7, 2012 at 12:15am by Bosnian*

**Calculus (pleas help I really need to check this)**

Assume that each of the follwing functions gives the position of an object at time t. Find the velocities indicated by setting up and evaluating a limt algebraically. (a) s(t) = 3t^2, Find v(-1). (b) s(t) = 1/t , Find v(2). (c) s(t) = square root of t, Find v(1). The answers ...
*Thursday, February 17, 2011 at 7:24pm by Catherine*

**Calculus**

yes, thanks just like to check my answers
*Wednesday, November 28, 2007 at 11:20am by Kelly*

**Check my CALCULUS answers please!**

Glad to help.
*Monday, October 7, 2013 at 12:08pm by Steve*

**Calculus (check my answers)**

Thank you soooo much!
*Tuesday, December 17, 2013 at 5:53pm by Lindsay*

**CALCULUS - Check my answers :)**

Is number 4 the last one?
*Thursday, December 19, 2013 at 7:18pm by Samantha*

**CALCULUS - Check my answers :)**

And 5 would be 25?
*Thursday, December 19, 2013 at 7:18pm by Samantha*

**Pre-Calculus-check answers**

Express 5-2i in polar form. Express your answer in radians to the nearest hundreth. r=sqrt5^2+-2i^2 which equals sqrt21.Arctan of -2/5+pi equals -18.7 Polar form=sqrt21 cis -18.7 Is this correct??
*Monday, September 1, 2008 at 12:53pm by Lucy*

**Pre-Calculus-check answers**

Express 5-2i in polar form. Express your answer in radians to the nearest hundreth. r=sqrt5^2+-2i^2 which equals sqrt21.Arctan of -2/5+pi equals -18.7 Polar form=sqrt21 cis -18.7 Is this correct??
*Tuesday, September 2, 2008 at 4:09pm by Lucy*

**Pre-Calculus-check answers**

Express 5-2i in polar form. Express your answer in radians to the nearest hundreth. r=sqrt5^2+-2i^2 which equals sqrt21.Arctan of -2/5+pi equals -18.7 Polar form=sqrt21 cis -18.7 Is this correct??
*Saturday, September 13, 2008 at 4:09pm by Lucy*

**pre-calculus**

If the equation is as you typed my money is riding with Damon. Your answers don't even come close to satisfying the equation.
*Tuesday, February 5, 2013 at 8:48pm by Reiny*

**Pre-Calculus**

f(x)= 3+5cos pi/3 (x-7) If f(x)=4, solve for x. Find 1st 3 positive values. my answers: 2.31, 5.69, 8.31
*Friday, October 18, 2013 at 8:32pm by Anonymous*

**Pre-calculus-check answers**

Determine whether the function f(x)[x+1] is odd, even, or neither. Answer: neither odd nor even 2)Find the least integral upper bound of the zeros of the function f(x)=x^3-x^2+1. Answer: upper bound, 1
*Saturday, August 23, 2008 at 1:51pm by Lucy*

**Pre-Algebra**

ok well my pre algebra teacher copied some worksheets and its pg 40 and its about some friars in a floral shop buisness. for extra credit we do the joke which is also a way to find out if our answers were correct. there is no 3/8 in my answers and welll yeah thats it.
*Tuesday, November 8, 2011 at 10:28pm by Emily*

**Pre-Calculus-check answers**

The graph of the equation y=x^3-x is symmetric with respect to which of the following? a) the x-axis b) the y-axis c) the origin d) none of these Answer: c 2) The graph of an odd function is symmetric with respect to which of the following? a) the x-axis b) the y-axis c) the ...
*Sunday, August 10, 2008 at 12:22pm by Lucy*

**Pre-Calculus-check answers**

State the period and phase shift of the function y=-4tan(1/2x + 3pi/8) a) 2pi, -3pi/4 b) pi, 3pi/8 c) 2pi, 3pi/8 d) pi, -3pi/8 Answer: d 2) What is the equation for the inverse of y=cos x+3: a) y=Arccos(x+3) b) y=Arccos x-3 c) y=Arccos x+3 d) y=Arccos(x-3) Answer:d Thanks for ...
*Saturday, August 30, 2008 at 8:38pm by Lucy*

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