Monday

December 22, 2014

December 22, 2014

**Branches of Math**

**Recent Math Questions**

Post a New Question | Current Questions

**Math**

Meg's pension plan is an annuity with a guaranteed return of 7% per year (compounded quarterly). She would like to retire with a pension of $20,000 per quarter for 15 years. If she works 31 years before retiring, how much money must she and her employer deposit each quarter?
*Saturday, October 25, 2014 at 1:07pm*

**Math**

A rental agency claims that the average rent that small business establishments pay in Suva city is $800. A sample of 10 establishments shows an average rate of $20. At alpha = 0.05, there enough evidence to reject the agencies claim? Assume that the population is ...
*Saturday, October 25, 2014 at 1:06pm*

**Math**

A typist can type 146 words in 100 seconds. At this rate, how many minutes and seconds would it take him to type 657 words.
*Saturday, October 25, 2014 at 12:38pm*

**Math**

Which verbal expression represents the algebraic expression? (A) 2 times a number minus 6 (B) twice the difference between 6 and a number (C) 6 less than twice a number (D) twice the difference between a number and 6 I think it's A, am I right? Thank You for your help.
*Saturday, October 25, 2014 at 12:14pm*

**math**

Let f(x) = 3+4x-x^{3}. Find the open intervals on which f is increasing (decreasing). Then determine the x-coordinates of all relative maxima (minima). 1. f is increasing on the intervals? 2. f is decreasing on the intervals?
*Saturday, October 25, 2014 at 12:14pm*

**math**

Find the critical numbers of the function f(x) = x^{1/4}-x^{-3/4}.
*Saturday, October 25, 2014 at 12:13pm*

**Math**

Is this a true statement? x+x+x+2+3=3x+5 I think this is could you tell me if I'm right? Big test comming! Thanks
*Saturday, October 25, 2014 at 11:33am*

**Math**

Simplfy the following expression - 3x + 5x + y+y+y I think the answer is 8x + 3y Would I be right? Thank You
*Saturday, October 25, 2014 at 11:32am*

**geometry**

Quadrilateral Math has been dissected into squares. The area of the red square is 64 square units and the area of the blue square is 81 square units. Determine the dimensions and the area of Quadrilateral Math?
*Saturday, October 25, 2014 at 10:14am*

**Math**

A tree is losing its trees. Two thirds fall off in the first week, two thirds of those remaining fall off in the second week, and two thirds off those remaining fall off in the third week. Now there are 37 leaves. How many leaves did the tree have originally?
*Saturday, October 25, 2014 at 9:06am*

**math**

What percent less than 45 is 25?
*Saturday, October 25, 2014 at 8:37am*

**Math**

Jamal lives 8 blocks from school. Bethany lives 3 times as far from school as Jamal . Michael lives 4 times as far as Jamal and Bethany combined . Write a number sentence that compares how far from school Bethany lives to how far from school Michael lives. Q2/ if you multiply ...
*Saturday, October 25, 2014 at 6:24am*

**math**

A caterer prepares three times as many pizzas as she usually prepares for a large party. The caterer usually prepares 5 pizzas. The caterer also estimates that each party guest will eat 1/3 of a pizza. First write an expression that represents this situation. How many party ...
*Saturday, October 25, 2014 at 4:41am*

**Math**

The Suva Energy Information Administration reported that 51.7% of homes in Suva were heated by natural gas. A random sample of 200 homes found that 115 were heated by natural gas. Does the evidence supports the claim, or has the percentage changed? (use a P-value method)
*Saturday, October 25, 2014 at 2:15am*

**Math**

A rental agency claims that the average rent that small business establishments pay in Suva city is $800. A sample of 10 establishments shows an average rate of $863. The standard deviation of the sample is $20. At alpha = 0.05, is there enough evidence to reject the agencies ...
*Saturday, October 25, 2014 at 2:09am*

**math**

A researcher is interested in estimating the average salary of Police officers in a large city. she want to be 95% confident that her estimate is correct. If the standard deviation is $1050, how large a sample is needed to get the desired information and to be accurate within...
*Saturday, October 25, 2014 at 1:53am*

**Secondary Math **

Fill in the empty spaces to complete the puzzle. In any row, the two left spaces should multiply to equal the right-hand space. In any column, the two top spaces should multiply to equal the bottom space. ________| - 3 | ___________ 3 | -5x+1 |-15x+3 _______ | ________| 30x&...
*Friday, October 24, 2014 at 10:56pm*

**Math **

5x^2-10x+d=0 Determine an integer value for d such that the equation has rational, non zero roots Please show me the steps and how to answer this question :) thanks:)
*Friday, October 24, 2014 at 10:51pm*

**Math**

Yes, it's me again! How would you write the expression that represents the perimeter of a rectangle measuring 4 x - 4 + 7 x + 1 Would it be -4 + 1 = - 5
*Friday, October 24, 2014 at 8:52pm*

**MATH HELP asap PLEASE**

A plane is steering at S83degreesE at an airspeed of 550 km/h. the wind is from N70degreesE at 85 km/h. Determine the ground velocity of plane to one decimal. Use the cosine and sine law.
*Friday, October 24, 2014 at 8:40pm*

**math**

.4(6) = as a simplified fraction? is it possible? if so, can you tell me how?
*Friday, October 24, 2014 at 8:33pm*

**Math**

I meant to say would it be 26 x + 12
*Friday, October 24, 2014 at 8:18pm*

**math**

How would you write the expression that represents the perimeter of a rectangle measuring 9 x + 9 and 4 x - 3 Would it be 26 x + 2 Any help would be appreciated. Thank You
*Friday, October 24, 2014 at 8:16pm*

**Help Math**

Jodi has a model of a tetrahedron (shown below) and would like to know how many different nets exist for the tetrahedron. How do you respond?
*Friday, October 24, 2014 at 8:14pm*

**Math 130**

Jodi says that if you double the radius of a right circular cone and divide the slant height by 2, then the surface area of the cone stays the same since the 2s cancel each other out. How do you respond?
*Friday, October 24, 2014 at 7:42pm*

**help Math **

A student wonders if she triples each measurement of a cereal box, will she need three times as much cardboard to make the new box. How would you help her decide?
*Friday, October 24, 2014 at 7:37pm*

**math**

What to Do: Consider the following, and then do the calculations to solve (formulas and concept explanations in the book). Your business provides a service to local residents. Your fixed costs are $2,000 per month, and you expect 40 customers per month. The variable cost ...
*Friday, October 24, 2014 at 7:35pm*

**math**

Your business provides a service to local residents. Your fixed costs are $2,000 per month, and you expect 40 customers per month. The variable cost associated with each service is $35. 1. Using cost-based pricing and a markup of 20%, what should the price be? Show ...
*Friday, October 24, 2014 at 7:31pm*

**Math**

A students asks how to find the shortest path between two points A and B on two different faces which are neither the top nor the bottom of a right rectangular prism, without leaving the prism. How do you respond?
*Friday, October 24, 2014 at 7:26pm*

**math**

Amy finished 15% of the job, Beth finished 20% of the remaining of the job, then Cathy finished 12% of the remaining of the Job. What percent is sitll not done?
*Friday, October 24, 2014 at 7:15pm*

**Math HELPP**

After increasing the price by 15%, the price of the book becomes 45. What was the original price of the book?
*Friday, October 24, 2014 at 7:05pm*

**math Help!!!!!!**

If Nicholas is located at (-3,2), what is the distance to get to the grocery store? Grocery store is at quadrant 4 and is on 1,-1 A. 2 B. 3 C. 4 D. 5 Is the answer B?
*Friday, October 24, 2014 at 6:29pm*

**Math, Trig/Pre Calc**

You have been asked to build a ramp for Dan’s Daredevil Motorcycle Jump. The dimensions you are given are indicated below. Find the height and incline in feet. Round to the nearest foot One side is 200 ft.The angle between the hypotenuse and the side of 200 ft is 13 ...
*Friday, October 24, 2014 at 6:06pm*

**Math**

What is an irregular number?
*Friday, October 24, 2014 at 5:59pm*

**math Help!!!!!!**

What is the distance between Nicholas's school and the post office? Nicholas's school is in quadrant 1 and is on 3,2 Nicholas's post office is in quadrant 3 and is on -2,-2 A. 6.4 B. 5.2 C. 3.6 D. 3.0 Is the answer C? Thanks
*Friday, October 24, 2014 at 5:54pm*

**math**

You have been asked to build a ramp for Dan’s Daredevil Motorcycle Jump. The dimensions you are given are indicated below. Find the height and incline in feet. Round to the nearest foot One side is 200 ft.The angle between the hypotenuse and the side of 200 ft is 13 ...
*Friday, October 24, 2014 at 5:38pm*

**Math**

15.05 ______ 21.5
*Friday, October 24, 2014 at 5:28pm*

**Math**

You have been asked to build a ramp for Dan’s Daredevil Motorcycle Jump. The dimensions you are given are indicated below. Find the height and incline in feet. Round to the nearest foot One side is 200 ft.The angle between the hypotenuse and the side of 200 ft is 13 ...
*Friday, October 24, 2014 at 4:29pm*

**math Help!!!!!!**

What is the distance between points D and F? Point D is located in quadrant 1 and is on 0,2 Point F is located in quadrant 3 and is on -3,-2 A. 5.4 B. 4.2 C. 3.7 D. 2.6 Is the answer C? Thanks
*Friday, October 24, 2014 at 4:27pm*

**Math Trig**

I'll do my best to describe this problem. Given A=17 degrees, B=73 degrees , x=q, y=5 and z=r use the figure to find the exact value of q and r x = base y = leg z = hypotenuse a = angle between z and x b = angle between z and y 90 degree angle = between x and y Solve for q...
*Friday, October 24, 2014 at 4:23pm*

**math**

I have 21 children in my class total. 6 of them are boys and 15 of them are girls. What is the percentage of males in the class
*Friday, October 24, 2014 at 4:17pm*

**math Help!!!!!!**

What is the distance between points A and E? Point A is in quadrant 1 and is on 3,4 Point B is in quadrnt 2 and is on 0,-1 A. 2.8 B. 3.2 C. 4.9 D. 5.7 Is the answer A?
*Friday, October 24, 2014 at 4:17pm*

**math**

is this correct 3*10^6 3*1000000 3000000
*Friday, October 24, 2014 at 3:55pm*

**Math**

A) P is approximately (0.883, 0.469), is a point on the unit circle with angle 28 degrees estimate the following. Sin 152 degrees = Cos 152 degrees = please help me step by step
*Friday, October 24, 2014 at 3:31pm*

**Math**

Find the coordinates of the point at 180 degrees on a circle of radius 3.4 centered at the origin. Round your answers to three decimal places, if required. ( , 0 ) I got 0 as the y coordinate. Please help me solve for x
*Friday, October 24, 2014 at 2:19pm*

**Math Calc**

Let theta be an angle in the first quadrant, and suppose sin theta equals a. Evaluate sin(180 degrees + theta) in terms of a sin(180 degrees + theta) =
*Friday, October 24, 2014 at 2:15pm*

**math**

Your business provides a service to local residents. Your fixed costs are $2,000 per month, and you expect 40 customers per month. The variable cost associated with each service is $35. 1. Using cost-based pricing and a markup of 20%, what should the price be? Show ...
*Friday, October 24, 2014 at 2:12pm*

**math**

what is the value of 23,565
*Friday, October 24, 2014 at 2:10pm*

**Math**

Using the Descartes Rule of Sign count the number of sign changes of f(-x) and determine the number of negative real zeros. 1. f(x)=x^3+x^2-10x-24 My answer: A few signs due change but not enough to say they changed." 0 sign changes of f(-x), which means f(x) has 0 ...
*Friday, October 24, 2014 at 2:10pm*

**Math**

Using the Descartes Rule of Sign count the number of sign changes of f(x) and determine the number of positive real zeros. 1. f(x)=x^3+x^2-10x-24 My answer: because the signs don't change the answer would be: "0 sign changes of f(x), which means f(x) has 0 positive ...
*Friday, October 24, 2014 at 2:05pm*

**math**

Tasha collected another set of data values, and used a calculator for the engine speed and horsepower data. She got an equation for the least-squares line: ŷ = 10 + 30x. If Tasha uses this equation to predict horsepower from engine speed, the horsepower associated with an...
*Friday, October 24, 2014 at 2:02pm*

**Math Trig**

A kite flier wondered how high her kite was flying. She used a protractor to measure an angle of 40 degrees from level ground to the kite string. If she used a full 120-yard spool of string, how high, in feet, was the kite? (Disregard the string sag and the height of the ...
*Friday, October 24, 2014 at 1:55pm*

**math**

The cost of soup, s, varies directly with the number of cans, c. When c is 4, the cost is $3. Which graph represents the cost of the soup?
*Friday, October 24, 2014 at 12:52pm*

**Math**

Interest is a concept familiar to most people: every credit card in existence has a term called annual percentage rate (APR), which is an interest rate. Suppose you charged $1,000 to a credit card that has a minimum payment each month equal to the interest owed. Can you figure...
*Friday, October 24, 2014 at 12:36pm*

**math please help**

Suppose that ice cream consumption per person at parties is normally distributed with a mean of 0.39 gallons, and a standard deviation of 0.26 gallons. If you are throwing a party with 33 guests, how much ice cream do you need to buy to make sure that the probability of having...
*Friday, October 24, 2014 at 11:38am*

**Algebra/math 117**

sequence an = 6n, starting with n = 1.
*Friday, October 24, 2014 at 10:23am*

**math**

Given: 2x + 3y = 6. What is the y-intercept? (0, 3) (2, 0) (0, 2) no intercept
*Friday, October 24, 2014 at 10:00am*

**Math**

x/9 -4= 5/18
*Friday, October 24, 2014 at 7:10am*

**Math**

Sara wants to put new carpet. She needs 20 square feet. the carpet was $4.00 a square foot. She got it for half price. What was the new cost of the carpeting? And the total?
*Friday, October 24, 2014 at 3:49am*

**math**

in the given figure, l||m. then the value of x is
*Friday, October 24, 2014 at 3:24am*

**Math**

Want to make a dog run. Have 199.4 feet of fencing and the garage is 19.2 feet wide. How long will the run be?
*Friday, October 24, 2014 at 2:36am*

**Please Help asap for math**

Given the following: vector u= [-2,-1,2] and vector v=[1,-1,-4] and vector w= [4,3,-2] find: a)theta, the angle between vectors, u and w. b)Are the vectors, u, v, and w coplanar?Show your answer algebraically.
*Friday, October 24, 2014 at 1:12am*

**Need Help asap for math!**

A plane is steering at S83degreesE at an air speed of 550 km/h. The wind is from N70degreesE at 85km/h. Find the ground velocity of the plane to 1 decimal space.
*Friday, October 24, 2014 at 1:01am*

**math**

chemistry experiment needed 12.45 grams of chemical to produce one liter of a gas. If Zoe wanted 24 liters of gas, how many kilograms of the chemical will she need?
*Friday, October 24, 2014 at 12:55am*

**Math**

There are two chords AB and AC in a circle.[AB]=10cm, [CD]=8cm and the radius of the circle is 12cm.what is the distance of each chord from the centre of the ccircle?
*Friday, October 24, 2014 at 12:54am*

**math**

Suppose you take out a loan for 180 days in the amount of $13,500 at 11% ordinary interest. After 50 days, you make a partial payment of $1,000. What is the final amount due on the loan?
*Thursday, October 23, 2014 at 11:46pm*

**math**

How do you solve this? -3y + 2 [6 9] [27 -18] [-12 15]=[30 6] -3y + 2 [6 9]- [-6 -9] -3y + 2[0 0] [-12 15] [12 -15] = [0 0] -3y + 2 = [27 -18]= -3y [27*2 -18*2] [30 6] [30*2 6*2] -3y =[54 -36] -3y /-3[54/-3 -36/-3] [60 8] = [60/-3 8/-3] y = [-18 12] [-20 -8/3] Is this correct?
*Thursday, October 23, 2014 at 11:28pm*

**math**

William owes $9,000.00 to a friend who is charging him interest of 1.60% p.m. he is required to settle the amount with 2 equal payments, one today and the other in 2 months. Calculate the size of the payments using 2 months as the focal date. Round your answer to 2 decimal ...
*Thursday, October 23, 2014 at 11:20pm*

**math**

Points A and B lie on the graph of the equation y = -4.3x. What are the y coordinates for each point? Point A: (-3, ) Point B: (5, ) Not multiple choice.. confused on how to find the other points
*Thursday, October 23, 2014 at 11:03pm*

**Math**

What is the slope of the line passing through (-3,4) and (2, -1)? 3/5 -1 1 ** -3/5
*Thursday, October 23, 2014 at 11:00pm*

**Math**

How do you divide 3/4 by 2/3?
*Thursday, October 23, 2014 at 10:57pm*

**math**

how do you estimate fractions? I know how to estimate numbers and decimals but the questions wants us to estimate fraction sand have the answer in fraction form. the question is : 2 1/10 divided by 1 1/5= how would these be estimated? without estimating I know the answer is 33...
*Thursday, October 23, 2014 at 10:35pm*

**math**

How many packs of DVDs can you buy with 198 dollars if one pack costs 18 dollars
*Thursday, October 23, 2014 at 10:29pm*

**Math**

Find a fraction between 7/9 & 8/9
*Thursday, October 23, 2014 at 10:22pm*

**math**

A) If x^2+y^3−xy^2=19, find dy/dx in terms of x and y. dy/dx=________ B) Using your answer for dy/dx, fill in the following table of approximate y-values of points on the curve near x=1 y=3. 0.96 ______ 0.98 ______ 1.02 ______ 1.04 ______ C) Finally, find the y-value for...
*Thursday, October 23, 2014 at 10:04pm*

**Math**

Joe is making a rectangular mosaic with colored tiles. He will use 20 tiles to make his design. What are all the different arrangements of tiles that Joe could use to design his mosaic?
*Thursday, October 23, 2014 at 9:01pm*

**Math 222**

Posted by Monica on Thursday, October 23, 2014 at 6:36pm. Please help me solve these two Rational Expressions? Sorry my addition sign does not work on my keyboard, so that is why I am using the word "plus". 1). g^2-6g-55 __________ g 2). k^3 plus k ___________ k^2 ...
*Thursday, October 23, 2014 at 8:59pm*

**math**

18 sections of fence each 1 meter long. What are the various sizes of rectangular pens using all 18 units of fence?
*Thursday, October 23, 2014 at 8:52pm*

**Math**

5 + y/6=8
*Thursday, October 23, 2014 at 8:44pm*

**math**

a poetry class won a $325 prize.the 13 students in the class share the prize equally.how many dollars,d,does each student receive?use the area model to help
*Thursday, October 23, 2014 at 8:05pm*

**math**

a ream of paper contains 500 sheets how many reams are needed to type a manuscript of 6000 pages explain how you know
*Thursday, October 23, 2014 at 8:02pm*

**Math**

Can you also use the LCM of the denominators of the fractions to rewrite the difference 8/15-1/6? What is the difference?
*Thursday, October 23, 2014 at 7:41pm*

**Math**

A decimal number changed to 23.7 after it was rounded. Give a decimal number that is less than 23.7 and another that is greater than 23.7 that each round to 23.7. Explain to what place each number was rounded.
*Thursday, October 23, 2014 at 7:29pm*

**math**

If vector u = [1,-3,-2] and vector v = [4,-5,3] find: a) |vector u + vector v - 5j | b) Find Q, where P (-7,5,-1] and vector PQ=2(vector u) c)find vector w which is orthogonal to both vector u and vector v
*Thursday, October 23, 2014 at 7:15pm*

**math algebra**

A new shopping is opening this month.before agreeing to open shops, store managers had toconsider monthly rent and whether to pay one time fee to put shop name on sign in front of store. Kikis kupcakes number of months total rent paid 2 9700 5 16750 8 23800 10 28500 12 33200 ...
*Thursday, October 23, 2014 at 6:55pm*

**Math 222**

Please help me solve these two Rational Expressions? Sorry my addition sign does not work on my keyboard, so that is why I am using the word "plus". 1). g^2-6g-55 __________ g 2). k^3 plus k ___________ k^2 plus k-42
*Thursday, October 23, 2014 at 6:36pm*

**Math **

Pey Soon has taken out a 20-year, $150,000 mortgage with monthly payments (made at the end of each month) at a stated mortgage rate of 6.8% per year compounded semi-annually. If she makes each payment on time, what will be the mortgage principal remaining after 10 years? ...
*Thursday, October 23, 2014 at 6:13pm*

**Math help**

You plan to make 24 equal quarterly payments (payments are at the end of each period) into an account to pays 8% (per year compounded quarterly). If you need $5,000 at the end of 10 years (i.e. 4 years after the last payment is made into the account), how much would you have ...
*Thursday, October 23, 2014 at 6:12pm*

**math**

A bottle of juice states that a serving is 1/2 cup. How many servings are in 2-pint container? ( Hint: One pint equals 2 cups?
*Thursday, October 23, 2014 at 6:05pm*

**Math**

Vanessa has 3 yards of cotton. She needs 3/4 yard for each skirt she makes. How many skirts can she make?
*Thursday, October 23, 2014 at 6:03pm*

**math**

write a multiplication equation and a division equation that represent the model shown below.176 *16=d this is correct.how to write a division equation.
*Thursday, October 23, 2014 at 5:51pm*

**Math**

Car Rentals charge 20 dollars per day plus a 10 dollar service charge to rent one of its compact cars. The total cost can be represented by the equation y=20x+10 where x is the number of days and y is the total cost Graph the equation What do the slope and y intercept ...
*Thursday, October 23, 2014 at 5:45pm*

**math**

write a multiplication equation and a division equation that represent the model shown below.176 16=d
*Thursday, October 23, 2014 at 5:35pm*

**math**

if you have a gas tank that is 37" X 10"X 121/2" how many gallons of gas will it hold ?
*Thursday, October 23, 2014 at 5:22pm*

**Math 12**

I could really use some help with this problem. Joe bought 100 shares of stock at $10.00 per share. When the shares increased to a value of $N each, he made a charitable donation of all the shares to the Euclid Foundation. He received a tax refund of 60% on the total value of ...
*Thursday, October 23, 2014 at 5:13pm*

**Help?**

Explain how to use mental math to simplify the expression. 6 • 3 • 5
*Thursday, October 23, 2014 at 5:11pm*

**Math.**

Is equation is true, false? I'm not sure. 3(4 + –5) = 3(–6 – 2)
*Thursday, October 23, 2014 at 5:02pm*

**Math Math!**

Marcus buys groceries for no more than $250.00 each week. He shops 4 times each month. How much should he budget for groceries for the month?
*Thursday, October 23, 2014 at 4:57pm*

**math asap**

if a 40 m rope is cut into two pieces in the ratio 3 : 5, how long is each piece? i tried: x=one piece 3/5 = x/40 x= 3*40/5 x=120/5 x=24 is that right?
*Thursday, October 23, 2014 at 4:49pm*

**Math problem?**

Lauren needs at most $80.00 for gas. How many twenty dollar bills does she need?
*Thursday, October 23, 2014 at 4:49pm*

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