Friday

February 27, 2015

February 27, 2015

Number of results: 28,614

**Precalc/Trig Word Problem**

From the top of a 200-ft lighthouse, the angle of depression to a ship in the ocean is 23 degrees. How far is the ship from the base of the lighthouse?
*October 8, 2012 by Greg*

**Trig/Precalc**

solve 6=e^0.2t Round your answer to the nearest hundredth Someone please help me - I don't understand this problem at all!
*April 19, 2012 by tabby*

**precalc**

Suppose that z1=6-8i. Find: A. The Trig Form of the complex number z1, where your theta is in degrees. B. The Trig form of z1*z2, where z2=5[cos(60degrees)+isin(60degrees)] C. The Trig Form of (z1)^4
*December 5, 2011 by Joshua*

**Trig/Precalc**

Find the greatest possible value of 5cos(x)+6sin(x). I know that it would be a good idea to look for identities that are in the form of acos(x)+bsin(x), but I can't seem to find any. Other than that I don't really know where to go with this problem. Any help would be much ...
*December 16, 2014 by majorbill*

**Precalc-Max and Min word problem w/ calculator**

A cylindrical can (w/lid) needs to be construced to hold 40 cbic inches. Find the dimentions of the can so that the total amout of material needed is a minimum i dont know how to do this!! please help- do you know any sites that reteach this?
*October 15, 2008 by Adam*

**Trig/PreCalc**

Factor the Polynomial completely: 10x^4y-20x^2y^2
*December 29, 2008 by Nuna*

**trig/PreCalc**

Find all real zeros of the function y = -7 + 4
*March 23, 2010 by jodi*

**Precalc**

Hello, good afternoon. I need help with my precalc hw. we are learning about finding zeros I dont which method I should use for this problem: if i is a zero of x^3+3x^2+ix+(4+i) what do i do? synthetic divison? or long division? when i did long division i got a werid ...
*October 14, 2008 by Samya*

**Precalc/Trig**

what angle does the line y=6/7x make on the xy plane with a positive x axis?
*October 20, 2012 by Liz*

**Precalc/Trig**

what angle does the line y=6/7x make on the xy plane with a positive x axis?
*October 20, 2012 by Liz*

**Precalc/Trig**

Find the smallest positive number t such that e^sin(t)=1/2
*October 20, 2012 by Liz*

**precalc/trig**

Write the partial fraction decomposition of the rational expression. 4x^2–19x+31/ (x+2)(x^2–4x+5)
*December 3, 2011 by Robert*

**Precalc/Trig 1**

What equation would you use to show that the point ((square root of 11)/(6), (5/6))is on the unit circle?
*October 8, 2012 by Greg*

**precalc/trig**

Solve the Logarithmic equation algebraically. Give an Exact Answer and an approximation for x to four decimal places. 20 log(2x+2)=45
*December 5, 2011 by Alexander*

**precalc/trig help please**

The area of a circle is 18pi square meters. What is the radius (leaving answer in simplest radical form)
*February 21, 2012 by Carlee'*

**Precalc/Trig 2**

The point P lies in the 4th quadrant and is located on a circle of radius 2. Find the missing coordinate for P. (___, (negative square root of 3)).
*October 8, 2012 by Greg*

**Precalc/Trig**

Find all values of x, 0<x<(pi/2) for which (1/( root 3))<cotx<(root 3)
*October 10, 2012 by Patrick*

**Precalc with Trig**

What value(s) of x from 0 to 2pi solve the following equation: cos squared x - cos x - 6 = 0
*April 11, 2013 by Natalie*

**precalc/trig**

olve for the interval [0, 2pi]. cos(x+ pi/4)+cos(x- pi/4)=1
*November 29, 2012 by bob*

**precalc/trig**

Find the trigonometric form of the number. (Round any angles to two decimal places.) −8 − i
*November 29, 2011 by Alex*

**Precalc-possible or impossible (trig)**

is this possible? sec __=-.04
*December 8, 2008 by yv*

**math-ms sue please**

Ms Sue thank you for the help with my other word problem can you check this one for me? Write a word problem and find the solution to the equation. 1/2-2/3 THe answer is -1/6 and the word problem I created is: Janet put 6 suckers on a table. 3 suckers were watermelon and 3 ...
*October 27, 2010 by m*

**Trig?Precalc**

write the rectangular equation x^2+y^2=6 in polar form. I do not want people to just post the answer! Please, show your work so that I can understand how to do these kinds of problems myself! Thank you and God Bless!
*April 19, 2012 by tabby*

**math-word problem**

The width of a rectangle is fixed at 21cm. What lengths will make the perimeter greater than 80cm. Please help with this word problem I do not even know where to begin.
*July 31, 2010 by Michelle*

**Algebra**

Word Problem: Jack mows the lawn in 4 hours, mary mows the lawn in 5 hours. how long will it take them if they mowed the lawn together? I have a hard time figuring out which formula to use to solve a problem in a word problem can anyone help and tell me how to set up the ...
*October 18, 2008 by Laura*

**Math**

Create an addition word problem and a subtraction word problem using fractions. Show how to find the solution to each problem. Once you find the solutions to your problems, rewrite the solutions as either a terminating or nonterminating decimal.
*October 1, 2012 by Christian*

**math**

Create an addition word problem and a subtraction word problem using fractions. Show how to find the solution to each problem. Once you find the solutions to your problems, rewrite the solutions as either a terminating or nonterminating decimal.
*November 7, 2014 by math help asap*

**Math- Precalc**

could someone please help me solve this problem... e^x - 12e^(-x) - 1
*November 15, 2010 by Alex*

**trig**

I'm trying to see if the teacher didn't give us the right problem or if I'm just not getting it. The problem is "re-write the expression without a fraction: 4/(1-sin x)". I can do it if the problem is sin squared x but I don't know how to solve the problem given. Pls help. thx
*September 19, 2009 by Priscilla*

**Trig/precalc**

Cos[x + (7 Pi)/4] + Cos[x - (7 Pi)/4] = 1
*February 12, 2013 by Joe*

**math**

Suppose your teacher tells you to write a word problem using the number 3. Which would be the best object to use in your problem? Explain. Then write and solve a word problem using that object. (tricycle, bike, wagon)
*September 24, 2014 by Bryce*

**Precalc/Trig**

I have no idea how to solve this one problem: Round to two decimal places. Two observers 25 feet apart, sight to the top of the tree. If the angle of elevation to the top of the tree from the observer closest to the tree is 30 degrees and the angle of elevation from the ...
*December 1, 2014 by Heather*

**pre-alg**

I need help to create an addition word problem and a subtraction word problem using fractions. I need to show how to find the solution to each problem. Once I find the solutions to my problems, I have to rewrite the solutions as either a terminating or nonterminating decimal.
*October 16, 2013 by AudioslavedCobain182*

**Trigonometry**

Use the trig Identities to find the other 5 trig functions. Problem 7.)Tan(90-x)=-3/8 8.)Csc x=-13/5 9.)Cot x=square root of 3 10.)Sin(90-x)=-.4563 11.)Sec(-x)=4 12.)Cos x=-.2351 I need HELP!
*January 5, 2010 by Jennifer*

**Trig**

Find an equation for the hyperbola described. Foci at (-4,0) and (4,0); asymptote the line y= -x. Please explain the steps of this problem. My book does not get an example of this type of problem and I'm not having any luck working this problem.
*July 19, 2011 by EVJ*

**Precalc and trig**

cos^2 (x+a)-sin^2(a)= (cos x)(cos (2a+x)) prove using only side i worked on the left side...
*February 22, 2009 by hayden*

**another precalc word problem**

The Cruiser Bicycle Company makes two styles of bicycles: the Traveler, which sells for $200, and the Tourister, which sells for $600. Each bicycle has the same frame and tires, but the assembly and painting time required for the Traveler is only 1 hour, while it is 3 hours ...
*September 25, 2010 by Janis*

**Trig/PreCalc**

Teach me how to express 5sqrt3 - 5i in polar form please. I don't want you to do the work for me. Just show me the steps I need to do the work properly on my own. Otherwise I will not pass this class or the exam when I enter college, and I do not want to retake PreCalc. Its a ...
*April 13, 2012 by tabby*

**Trig**

HELP!!!! I dont know how to do the trig identity with this problem csc^4 x-cot^4x= Csx^2 x + cot^2x
*March 8, 2012 by Quetzally*

**precalc and trig**

cos^2 (a+x) -sin^2 a=cos x * cos(2a+x)
*February 22, 2009 by hayden*

**Word problem math**

Word problem. You cut a 2 m long board into 2 pieces . One piece is 10 cm shorter than the other. How long are each boards.? I got. 1 pc at 80!cm. the other 1pc at 100 cm Is this right ?
*October 14, 2012 by Marco*

**Math word problem**

I have this word problem that I can't figure out. The problem is: A 15 lb weight is positioned 10 in. form a fulcrum. At what distance from the fulcrum must a 12 lb weigt be positioned to keep the scale balanced? The substitute that I had today said that the 12 lb. weight ...
*August 27, 2008 by Tiffany*

**Trig/Precalc**

So I have two questions that have been puzzling me for quite some time and would really appreciate any help with either of them! (a) There are four positive intergers a, b, c, and d such that 4cos(x)cos(2x)cos(4x)=cos(ax)+cos(bx)+cos(cx)+cos(dx) for all values of x. Find a+b+c...
*January 4, 2015 by majorbill*

**Precalc/Trig**

wave is modeled by the function ... h(t) = 3cos(p/10)*t What is the period of the wave (T) *frequency (F) is defined as the number of cycles of the motion per second. What is the relationship between F and T? Find the wave height (H) which is the vertical distance between the ...
*September 26, 2012 by George*

**english**

What sentence uses italics, question marks, and punctuation correctly? ( I'm stuck on this problem) A, "How many r's are there in the word February"? B,"How many r's are there in the word February?" asked ty. c, "How many r's are in the word February," asked ty. D,How many r's...
*February 4, 2014 by kitten*

**Trig/Precalc**

The system of equations: |z-2-2i|=sqrt(23), |z-8-5i|=sqrt(38) has two solutions z_1 and z_2 in complex numbers. Find (z_1+z_2)/2. My first instinct on this problem was to square each equation given that the square of the magnitude of a complex number is much easier to deal ...
*February 16, 2015 by majorbill*

**math compare**

word problem the temperature at 3am was -17.3F by noon the temperature was -17.8F. at what time was it the coldest? i said -17.8F is that right? word problem sam is 5/8" taller than jackie. Shelly is 0.7 in taller than Jackie. who is the tallest? i guessed is it Jackier ?
*December 8, 2011 by marko *

**Precalc/Trig**

evaluate the expression assuming that cos(x)=1/7, sin(y)=1/3, sin(u)=2/5 and cos(v)=1/3. what is cos(u+v)? sin(x-y)? and tan(u-v)?
*November 10, 2012 by Liz*

**Trig**

How do i set this trig problem up? PLEASE help me. Find tan (s + t) given that sin s = 1/4, with s in quadrant 2, and sin t = -1/2, with t in quadrant 4.
*May 3, 2010 by Dave*

**math**

for the following equations, write a word problem draw a picture, and find the solution to the equation. 5/12 - 1/3=? I know the answer is 1/12 but am stumped on how to write the word problem and draw a picture
*October 27, 2010 by m*

**Precalc/Trig**

I don't understand how to do these problems: Find two pairs of polar coordinates for each point with the given rectangular coordinates if 0 ≤ θ ≤ 2π. Round to the nearest hundredth, if necessary. 17. (2, -3) Answers: (3.61, 5.30) and (-3.61, 2.16) 19. (a...
*January 21, 2015 by Heather*

**college trig word problem**

A Ferris wheel has a radius of 25 feet.The wheel is rotating at two revolutions per minute.Find the linear speed, in feet per minute, of a seat on this ferris wheel.
*December 15, 2012 by Joel*

**Trig/ English**

I need an Acrostic poem for the word "Exponent"
*January 22, 2015 by Emily*

**Trig/Pre-Calc**

Need help with current Trig problem for tomorrow: Solve the logarithmic equation algebraically. Approximate the result to three decimal places. 6log3(0.5x)=11 I know to start off the equation you divide by 6. I know the answer is 14.988. I just am puzzled on how to receive the...
*May 16, 2011 by Eric*

**trig/precalc**

An airplane with a ground speed of 750 mph and a bearing of N 40 E encounters a wind of 50 mph with a bearing of S 30 E. Find the bearing and ground speed of the plane.
*December 16, 2012 by Mia*

**math word problem**

word problem need help: suppose you own a card shop. you buy one line of cards at a rate of 4 cards for $5. you plan to sell the cards at a rate of 3 cards for $5 how may carfds must you sell in order to make a profit of $100.00 i dont understand how to get answer can you help
*September 8, 2012 by marko *

**precalc h**

sin(theta)/1-cos(theta) + 1-cos(theta)/sin(theta) = 2csc(theta) That question makes absolutely no sense.. could someone help me? or lead me in the direction to figuring it out? and.. (Beside the trig functions is theta) 1+1/cos = tan^2/sec-1
*December 9, 2012 by sam*

**Precalc/Trig**

2 roads intersect at an angle of 60 degrees. A friend's mail box is 434 feet from that intersection and your mailbox is on the other road and is 525 feet from the intersection. How far is it from your mailbox to your friend's mailbox? I got 1016.66 feet, but that is wrong. ...
*December 4, 2014 by Heather*

**Precalc with Trig**

What value(s) of theta (0 less than or equal to theta less than or equal to 2pi) solve the following equation: cos squared theta - cos theta - 6 = 0
*April 7, 2013 by Natalie*

**English **

Identify and choose the one underlined word or phrase that should be corrected. What is the meaning of above sentence?Will i find a word which is incorrected in the sentence? In my(A) opinion they aren't(B) going nowhere(C) special because of(D) financial problem(E). In this ...
*June 18, 2011 by Bayarbold*

**elementary**

write a problem write a word problem involving the number of pages in a book.then write the numerical expression that you would need to use to solve your problem.
*October 29, 2012 by swetha*

**math**

2.-The longest one-word name of any place in America is Chargoggagoggmanchauggagoggchubunagungamaugg.This name for a lake near webster, Massachusetts, is 45 letters long. It is a Native American name that means "You fish on you side, I'll fish on mine, and no one fishes in the...
*January 29, 2011 by Luis*

**Word Processing**

I'm a GranMa in my 60's trying to learn Word/Windows. I started with the 2nd course and have had only this one problem in 3 weeks so that is good. I don't think the answer to my problem is in the book for THIS course. I can't figure out how to use the commands with the ...
*October 11, 2007 by GranMa Cee*

**Algebra/Quadratic equations**

I have to make a word problem/story out of this quadratic equation -t^2+3t+18=0 The plot of the story I want to write about has to deal with world hunger, and food being dropped in to remote locations by helicopter. Can someone please help me come up with a word/problem that ...
*May 12, 2014 by jarron*

**math**

Can someone please help me with this word problem!?! I know the answer which is 784 feet. But I have no clue how to solve it. Can someone please show how to solve this problem? The word problem is: The melt in Your Mouth Chocolate Factory is a rectangular building. The ...
*September 4, 2012 by aaron*

**Math**

Question: Write a word problem using 7 groups. And then solve the problem Can you give an example?
*November 12, 2014 by James*

**Trig/Precalc**

a lamp post that is 8 feet high casts a shadow 5 feet long. how tall is the person standing beside the lamp post if his shadow is 3.5 feet long
*November 24, 2013 by Marusa*

**precalc**

Hi. Can someone please help me with this problem? A rectangular block of metal weighs 3 oz. How many lbs will a similar block of the same metal weigh if the edges are twice as long?
*October 31, 2007 by Charlotte*

**precalc: elimating the parameter**

hi, i'm having trouble understanding the concept of eliminating the parameter to obtain an equation in x and y alone. can anyone please solve this problem and explain it? thank you so much. x = 3T-4 y= = 1-2T (0<t<3) those signs are actually less than or equal to.
*July 9, 2008 by joseph*

**Difficult Trig Word Problem**

The displacement of a spring vibrating in damped harmonic motion is given by y(t) = 4e^-3t sin(2pi*t) where y = displacement and t = time with t greater than/equal to zero. Find the time(s) when the spring is at its equilibrium position (y=0). The number "e" is Euler's number...
*November 14, 2012 by Greg*

**accounting**

Write a word problem involving a discounted price. Describe the situation and pose the question, but DO NOT SOLVE the problem.
*January 29, 2011 by catrina*

**ALG2! WORD PROBLEM!**

define a variable and write an inequality for each problem.then solve. Nineteen more than a number is less than 42.
*October 4, 2012 by tyneisha*

**Poetry**

I need to write a poem with the word ALGEBRA but the only problem is that my teacher wants complete sentences with each letter instead of a word for a letter. Can you please help?
*September 13, 2009 by Mark*

**math trig**

ln(2x-5)= 4 how do i this problem? thanks!
*May 21, 2012 by greeny*

**Science/Math**

Word Problem page 19 John and Al are in a 15 km race. John averages 4.4 m/s during the first half of the race and then runs at a speed of 4.2 m/s until the last 200 m, which he covers at 4.5 m/s. At what average speed must Al run to beat John? The textbook that included the ...
*September 29, 2013 by Walter*

**Proof math problem help? Please help if you can!**

Let AB be the diameter of a circle, and let point P be a point on AB. Let CD be a chord parallel to AB. Prove that PA^2 + PB^2 = PC^2 + PD^2 It can be solved using geometry methods (no trig). Anyway, I figured out that PA^2 +PB^2 = 2OP^2 + 2OB^2. However, I cannot find right ...
*January 15, 2013 by Knights*

**simple interest**

What is the amount after 1 year on $315 invested at 7%, if interest is simple interest? Multiply $315 by .07 to find the interest earned. Add this figure to $315 to find the total at the end of one year. this doesnt help me!i need to know this and they gave me is to solve a ...
*March 28, 2007 by victoire*

**Trig**

How do you do this problem? 1+i(square root of 3)
*November 12, 2009 by Kevin*

**Trig**

How do I solve this problem? tan (30° + x)
*May 2, 2010 by Abby*

**math (final trig problem)**

Solve for x on the interval [0,π/2): cos^3(2x) + 3cos^2(2x) + 3cos(2x) = 4 I havent done trig for a while so what exactly does that mean in solving for x on that interval and how would i go about doing that? Where are you getting these tough trig questions?? how about ...
*April 30, 2007 by jacob*

**math**

write a word problem for 1/2 - 2/3 = and write a word problem for 5/12 - 1/3 =
*August 28, 2009 by Nat*

**trig(really struggling with this problem)**

expand (x + y)^5
*November 10, 2008 by jerson*

**Trig**

How do you find the H-Shift. My problem is y=5 sin(3x-pi/2).
*January 14, 2010 by Jennifer*

**math,algebra**

I have to make a word problem with a real life situation that follows a linear equation i have to come up with the independent variables being years.Then i have to create an equation or inequality that could be used for analysis, prediction, or decision making.then, draw the ...
*January 14, 2007 by jasmine20*

**math**

Create your own word problem that uses a system of equations to solve. Your problem must include the following words: beach,hammock,dance,and troll.
*February 24, 2011 by Nick*

**Trig problem**

What is a coterminal angle with 170 degrees?
*August 14, 2009 by Casey*

**trig**

how do i solve this completing the square problem: 3x^2+12x+10=0
*April 26, 2011 by Anonymous*

**trig/precalc**

a plane flies 810 miles form Franklin to Centerville with a bearing of 75 degrees (clockwise from north). then it flies 648 miles from centerville to rosemont with a bearing of 32 degrees. find the straight-line distance and bearing from rosemont to franklin.
*January 20, 2011 by mimi*

**Ms Sue help word problem**

In last Saturdays parade Tom counted a total of 76 bicycles and tricycles, for a total of 227 wheels. How many tricycles were in the parade? word problem - Marko, Thursday, September 29, 2011 at 10:31pm i go 75 tricyles x 3 = 225 wheels 1 bike x 2 = 2 2wheels total of 227 ...
*September 29, 2011 by Marko*

**Math**

Need some help on a word problem. It has a storage chest. The dimensions for the top of the chest are 28 in wide, 46 in long, and 1 in high. The bottom of the chest is 28 in wide, 46 in long, and 17 in high. The word problem is Cynthia packs the chest with sweater bags that ...
*February 28, 2012 by Brandi*

**science**

What is an acrostic poem for the word mesozoic? (must represent the word as you go as in the word relating to that word(: PLEASE RESPOND ASAP!!!!!!!!
*January 9, 2013 by Laycee Montgomery*

**trig**

Find arcsin [cos (Pi/2)] The answer is 0. How do you solve this problem? Thanks.
*June 8, 2009 by Chris*

**algebra 2 trig**

i need to find out how to solve this problem: 9x+2 7 ---------- + --- 3x^2-2x-8 3x^2+x-4
*September 27, 2009 by eden*

**algebra-trig help asap**

x=sec^-1 2 I really need help with this problem. Thanks
*April 18, 2012 by missy*

**Math**

How do you create a word problem using unit rate? Please check the explanation at this site -- http://www.321know.com/rat-unit-rate.htm One of the most common word problems might be -- George averages 60 miles per hour when driving on a highway. How far will he go in three ...
*January 16, 2007 by Tom*

**prefixes,suffixes,roots**

do i type in the root word for example [agr] in the search bar and then the word that start with the 3 same letters in the word is the word i use to look up
*October 2, 2008 by Niqua*

**Math Word Problem**

Please help with this math word problem: Jamal has a 5X7 picture that he took on his summer vaction and he wants to use a photo copier to enlarge it to an 8X10 picture. To enlarge Jamal has to specify a percent between 50% and 200% on the copier. Explain 2 different ways Jamal...
*August 28, 2012 by Please Please Help*

**Statistics**

A typist at a constant speed of 65 words per minute makes a mistake in any particular word with probability 0.06, independently from word to word. Each incorrect word must be corrected, a task which takes 14 seconds per word. Find the mean of the time (in seconds, round-off to...
*February 28, 2011 by Jon*

**Statistics**

A typist at a constant speed of 65 words per minute makes a mistake in any particular word with probability 0.06, independently from word to word. Each incorrect word must be corrected, a task which takes 14 seconds per word. Find the mean of the time (in seconds, round-off to...
*February 28, 2011 by Jon*

**Statistics**

A typist at a constant speed of 65 words per minute makes a mistake in any particular word with probability 0.06, independently from word to word. Each incorrect word must be corrected, a task which takes 14 seconds per word. Find the mean of the time (in seconds, round-off to...
*February 28, 2011 by Jon*

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