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November 26, 2014

November 26, 2014

**Branches of Math**

**Recent Math Questions**

Post a New Question | Current Questions

**Math Help!**

tan (2theta + 8) = -0.489 theta = ? i'm on my last attempt to solve this problem on my hw. I tried subtracting 8 from -0.489 then trying to find the inverse but no luck.... I got -4.245 as one of my answers,-0.7267, no luck so far :(
*Friday, November 7, 2014 at 5:42pm*

**Math**

Felix used a scale factor of 1 inch = 2.5 feet to draw model of his backyard, as shown below. He is planning to build a fence around the yard. If the cost of the fence is $3.50 per foot, how much will it cost him to build the fence? Length 2.75in. width 1.25in Is my answer ...
*Friday, November 7, 2014 at 5:38pm*

**Elementary Math**

X+(x+)+ (X+2)=3x+ 3 then anotgher student wrote (X-1)+ X + (X+1)=3X which one is correct
*Friday, November 7, 2014 at 5:20pm*

**math**

partb : a shopper brought four of the same shirt and paid 48$ after the 40% discount . what was the original price of one of the shirts
*Friday, November 7, 2014 at 5:14pm*

**Math**

theta = 16 pi / 5 How to find the reference angle in radians? Do i have to use degree to pi conversion?
*Friday, November 7, 2014 at 5:12pm*

**Math**

cos x = -0.6 , 0 <= theta <= 2pi Use inverse trigonometric functions to find a solution to the equation in the given interval. Then find all other solutions to the equation on this interval. x = x =
*Friday, November 7, 2014 at 4:51pm*

**math**

If you can earn a 4% average return on your investments, how much invested capital must you have to earn $53000.00 per year.
*Friday, November 7, 2014 at 4:20pm*

**math**

James wishes to make a deposit. He has these bills: 16 ones, 5 fives, 5 tens, and 3 twenties. He has 4 nickels, 20 dimes, and 16 quarters. James has checks for $66 and $53.75. James wants to receive $50 in cash. What should he enter on the TOTAL line? $
*Friday, November 7, 2014 at 3:54pm*

**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.
*Friday, November 7, 2014 at 3:37pm*

**Math**

solve for 0 <= t <= 2pi cos t = 1/2 Give your answers in increasing order t = t =
*Friday, November 7, 2014 at 1:49pm*

**Math Trig Help**

sin theta = x/3, with theta in the first quadrant, find the expression for cos theta and tan theta. Answers will be in algebraic terms of x. Give exact answers with 0 < theta <pi/2 (0 less than or equal to theta, less than or equal to pi/2 Cos theta ? Tan Theta?
*Friday, November 7, 2014 at 1:27pm*

**Math**

Sin theta = 1/4, what is sec theta?, tan theta? give exact answers for 0 less than or equal to theta less than equal to pi/2
*Friday, November 7, 2014 at 1:25pm*

**Math**

sec 7pi/4 without a calculator Find the exact answer
*Friday, November 7, 2014 at 1:24pm*

**Math**

How Does finding the square root of a number compare to finding the cube root of a number
*Friday, November 7, 2014 at 12:46pm*

**Math**

Which function could be the parent of y = 3|x| ? A)y = |x| B)y = 3x C)y = x3 D)y = 3 + x
*Friday, November 7, 2014 at 12:18pm*

**Math**

How can you sketch the graph y = |x - 2| ? A)Translate the graph of y = |x| two units up. B)Translate the graph of y = |x| two units down. C)Translate the graph of y = |x| two units left. D) Translate the graph of y = |x| two units right.
*Friday, November 7, 2014 at 12:14pm*

**Math Question**

Laura was given two points (3,-2) and (-2,4) and was asked to create an equation that represents the line that passes through these points. Write two equations that she could use.
*Friday, November 7, 2014 at 11:34am*

**math**

Mrs. Clarkson designed a rectangular garden with a length of 15 meters and a width of 8 meters. She plans to build a walkway through the garden from one corner to the next. What measure is closest to the length of the diagonal walkway?
*Friday, November 7, 2014 at 9:54am*

**math**

How do you find the answer to 35.5×18.76
*Friday, November 7, 2014 at 9:42am*

**math**

I can't understand rounding rules of numbers Can you simply explain it ?
*Friday, November 7, 2014 at 9:24am*

**math**

Bert is 5 years older than twice the age of mario. Nine years ago, the sum of their ages is 50. How old is each now?
*Friday, November 7, 2014 at 7:58am*

**math**

1. A farmer has 1000 acres of land on which corn, wheat, or soybeans can be grown. He also knows that each acre of corn requires 5 days of labor and yields a profit of $20. Each acre of wheat requires 9 days of labor and yields a profit of $40. Each acre of soybeans requires ...
*Thursday, November 6, 2014 at 11:47pm*

**MATH**

1: The table shows the low outside temperatures for Monday, Tuesday, and Wednesday. By how many degrees did the low temperature drop from Tuesday to Wednesday? 2) The table shows the low outside temperatures for Monday, Tuesday, and Wednesday. By how many degrees did the low ...
*Thursday, November 6, 2014 at 11:45pm*

**MATH**

A biologist is recording the loss of fish in a pond. She notes the number of fish, f, in the pond on June 1. On July 1 there were 63 fish in the pond, which is 52 fewer fish that were in the pond on June 1. Which equation represents this situation?
*Thursday, November 6, 2014 at 11:36pm*

**MATH**

1: The table shows the low outside temperatures for Monday, Tuesday, and Wednesday. By how many degrees did the low temperature drop from Tuesday to Wednesday? 2) The table shows the low outside temperatures for Monday, Tuesday, and Wednesday. By how many degrees did the low ...
*Thursday, November 6, 2014 at 11:27pm*

**Math**

Adan used the three fractions to make a circle graph colored each a different color. What fraction of the graph is not colored?Explein your answer 2/5 ,1/6 ,and 1/3. Can somebody help me!!!!
*Thursday, November 6, 2014 at 11:12pm*

**Math **

Groups in math class have 4 green marbles, 6 yellow marbles, and 10 black marbles. Each group pulls out a marble, records it, and then replaces it 50 times. The class complies its data. how many times can you expect to pull out a green marble with 1000 pulls?
*Thursday, November 6, 2014 at 10:43pm*

**math**

natasha had 7/8 gallon of paint. her brother ivan took 1/4 gallon to paint his model boat. natasha needs at least 1/2 gallon to paint her bookshelf. did ivan leave her enough paint?
*Thursday, November 6, 2014 at 10:39pm*

**math**

Hi! If 1/8=1 foot on a scale and the deck is 2 3/8 inch. How many feet will it be if 1/8 inch is equal to 1 foot 3/8 divided by 1/8=3ft 2 in divided by 1/8=
*Thursday, November 6, 2014 at 9:57pm*

**Algebra/Math **

The graphs of a function f(x)=3x+b and its inverse function f^-1(x) intersect at the point (-3,a). Given that b and a are both integers, what is the value of a?
*Thursday, November 6, 2014 at 9:50pm*

**math**

0.082 rounded to ?
*Thursday, November 6, 2014 at 9:47pm*

**Math**

The number of megapixels in a digital camera is one of the most important factors in determining picture quality. But, do digital cameras with more megapixels cost more? The following data show the number of megapixels and the price ($) for 10 digital cameras (Consumer Reports...
*Thursday, November 6, 2014 at 9:38pm*

**Math/Algebra **

The graphs of y=3-x^2+x^3 and y=1+x^2+x^3 intersect in multiple points. Find the maximum difference between the y-coordinates of these intersection points.
*Thursday, November 6, 2014 at 9:02pm*

**Math**

to find 6x8, can I use the facts for 5x4 and 1x4
*Thursday, November 6, 2014 at 8:46pm*

**Math**

What is 408,032,009 in expanded form
*Thursday, November 6, 2014 at 8:39pm*

**math**

is a negative times a negative ALWAYS positive? or can it be negative as well?
*Thursday, November 6, 2014 at 8:36pm*

**MATH**

prove the identity: cos(x)*csc(x)*tan(x)=1
*Thursday, November 6, 2014 at 8:17pm*

**Math**

7x-9=4x
*Thursday, November 6, 2014 at 8:16pm*

**Math**

If Manuel spends 30 dollars a week when he has $1090, how many will he have after 11 weeks? He will have $760 When will he be out of money??
*Thursday, November 6, 2014 at 8:06pm*

**math**

Look at the numbers below. 75, 74, 72, 69, 65 A: describe the pattern
*Thursday, November 6, 2014 at 8:06pm*

**Math**

Susan's grandmother gave her 25 dollars and plans to save 2.50 dollars each week but instead of Susan spending the 25 she decides to deposit the 25 dollars in a bank. How will the line change if she deposits 25 from her grandmother but decided she can only save 2.00 ...
*Thursday, November 6, 2014 at 8:04pm*

**Math**

What is the easiest way to solve an algebraic equation?
*Thursday, November 6, 2014 at 8:01pm*

**math**

tony walked 3.5 miles in 7/8 of an hour. at this rate, how many miles can tony walk in one hour?
*Thursday, November 6, 2014 at 7:49pm*

**math**

a boy standing on a vertical cliff 50m high is looking down an angle of depression of 20 degree at a car. how far is the car from the base of the cliff?
*Thursday, November 6, 2014 at 7:34pm*

**math**

7 books to wrap, each 5/6 of a foot long. how long a roll needed 7x12 =84 5/6x7=35/42?
*Thursday, November 6, 2014 at 7:23pm*

**Math**

What is standard form? I searched it online, but I found multiple different answers. Thanks to the dudes and girls who help me out ;)
*Thursday, November 6, 2014 at 7:14pm*

**college statistics **

the math SAT scores for all students who applied to the school of engineering are normally distributed with M=629 and standard deviation of 60. the school of engineering has decided to accept those students whose scores fall in the top 15%. what is th minimum score an appliant...
*Thursday, November 6, 2014 at 6:34pm*

**math**

-9-(12-3x)
*Thursday, November 6, 2014 at 6:29pm*

**math**

a football player attempts a field goal from a distance of 52 yards. The ball reaches a maxium height of 9 yrds and lands 8 yards behind the uprights. If the uprights are 3 yards high. algebraically determine if the field goal was successful
*Thursday, November 6, 2014 at 6:28pm*

**MATH**

FIND THE UNIT RATE ROUND TO THE NEAREST HUNDREDTH ?TRAVEL 250 MIN IN 5 HOUR
*Thursday, November 6, 2014 at 6:17pm*

**Math**

What 3 positive integers satisfy a^3+b^3=c^3 ?
*Thursday, November 6, 2014 at 6:10pm*

**Math- Had Sub teacher, need help**

My professor won't be back for a week and we have an exam tomorrow. The sub was going over a problem towards this question but I barely understood her. Tried to speak to her after class but she was very impatient. I need help please. The manager of a large apartment ...
*Thursday, November 6, 2014 at 6:05pm*

**Math**

the commission on a house that sold for $28,000 was $1,140, what was the rate of commission paid by the broker?
*Thursday, November 6, 2014 at 6:01pm*

**Math**

What is the probability that a randomly thrown dart hits a shaded region, given that the dart lands within the rectangle? All of the circles are congruent, and the diameter of each circle is 6 cm.
*Thursday, November 6, 2014 at 5:59pm*

**college math**

1. A farmer has 1000 acres of land on which corn, wheat, or soybeans can be grown. He also knows that each acre of corn requires 5 days of labor and yields a profit of $20. Each acre of wheat requires 9 days of labor and yields a profit of $40. Each acre of soybeans requires ...
*Thursday, November 6, 2014 at 5:54pm*

**Math help!**

Miriam is four years older than Ricardo. Ten years ago Miriam was 3 times as old as Ricardo was then. A: How old are they now? B: Determine whether your answer is correct by checking that it satisfies the conditions of the problem.
*Thursday, November 6, 2014 at 5:52pm*

**Math, Please Help!**

Ten years from now Alex's age will be 3 times her present age. Find Alex's age now.
*Thursday, November 6, 2014 at 5:45pm*

**Math, Please Help!**

At the Out - Rage Benefit Concert, 723 tickets were sold for $3/ student and $5/ non- student. The benefit raised $2,815. How many non- student tickets were sold?
*Thursday, November 6, 2014 at 5:40pm*

**Math, Please Help!**

Ryan is building matchstick square sequences, as shown ( first one used 4, second one used 7, third one used 10, and the forth one used 13). He used 599 matchsticks to form the last two figures in his sequences. How many matchsticks did he use in each of the last two figures?
*Thursday, November 6, 2014 at 5:38pm*

**Math**

Luka is eating crackers. Each serving has 1.6 grams of fat. She ate 0.75 serving of crackers at lunch. She is now eating 1.5 servings of crackers as a snack. How many grams of fat did Luka eat all together? Explain how you solved the problem
*Thursday, November 6, 2014 at 5:25pm*

**Math HELP!**

Find the unit rate. In 10 months, 62.6 gallons were used. A. 0.16 gallon/month B. 10 gallons/month C. 6.26 gallons/month D. 626 gallons/month Is the answer C?
*Thursday, November 6, 2014 at 5:19pm*

**Math HELP!**

Find the unit rate. Rounf to the nearest tenth, if necassary. 344 miles is 11 hours A. 344 miles/hour B. 3,784 miles/hour C. 0.03 mile/hour D. 31.27 miles/hour Is the answer a?
*Thursday, November 6, 2014 at 5:08pm*

**Math HELP!**

The cost of your favorite lemonade is $3.84 for 3 gallons. Write this as a unit rate. A. $3.84/1 gallon B. $1.28/1 gallon C. 1 gallon/$1.28 D. $1.45/1 gallon Is the answer b?
*Thursday, November 6, 2014 at 5:01pm*

**Math/Statistics**

The number of megapixels in a digital camera is one of the most important factors in determining picture quality. But, do digital cameras with more megapixels cost more? The following data show the number of megapixels and the price ($) for 10 digital cameras (Consumer Reports...
*Thursday, November 6, 2014 at 5:01pm*

**Math Help**

Hi! I'm really lost on how to do this. Does anyone know how to solve this? Thanks! :) Condesne the expression to the logarithm of a single quanity. 4(lnz+ln(z+5)]-2ln(z-5)
*Thursday, November 6, 2014 at 5:01pm*

**Math Please help**

I do not have any Idea how to set this up. Please walk me through the steps. A.) If a customer buys x copies then he or she pays $500 sqrt x. it cost the company $10,000 to develop the program and $2 to manufacture each copy. If a single customer were to buy all the copies of ...
*Thursday, November 6, 2014 at 4:59pm*

**Math HELP!**

A class has 27 students. Fifteen are boys and the rest are girls. What is the ratio of girls to total students? A. 12:15 B. 15:12 C. 27:12 D. 12:27 Is the answer A?
*Thursday, November 6, 2014 at 4:50pm*

**Math HELP!**

Mac's farm has a total of 18 horses and 27 cows. What is the ratio of horses to cows in simplest form? A. 6/9 B. 18/27 C. 2/3 D. 3/2 Is the answer C? Thank you
*Thursday, November 6, 2014 at 4:42pm*

**math**

Kelly has 4 times as many songs on her music player as Lou. Tiffany has 6 times as many songs on her music player as Lou. Altogether, they have 682 songs on their music players. How many songs does Kelly have. Please teach me the steps on how to do it I`m having trouble on ...
*Thursday, November 6, 2014 at 4:36pm*

**Math **

How many square units are in the area of the triangle whose vertices are the x and y intercepts of the cuure y=(x-3)^2(x+2)?
*Thursday, November 6, 2014 at 3:44pm*

**Math**

Use the properties of logarithms to rewrite and simplify the logarithmic expression. 1.) log(9/300) 2.) log2(4^2 x 3^4)
*Thursday, November 6, 2014 at 3:28pm*

**Math**

A bungee jumper falls from a bridge 300 feet above ground. Her height above ground after t seconds is given by the equation h=16t^2+300 where h is the height of the jumper in feet and t is the time in seconds after she jumps. Approximately how long will it take for the bungee ...
*Thursday, November 6, 2014 at 3:19pm*

**2 Math Questions**

1) What do you do to check whether a number is rational or irrational? Use an example of a rational and an irrational number. 2) How does finding the square root [√] of a number compare to finding the cube root [^3√] of a number? Use the number 64 in your ...
*Thursday, November 6, 2014 at 3:18pm*

**Math**

Joy knits a square blanket that has an area of 1,500 square inches. What is the approximate length of each side of the blanket? A. 16 B. 27 C. 39 D. 42 _____________________________________ As an estimate for √47 is between ___? A. 4 and 5 B. 5 and 6 C. 6 and 7 D. 7 and ...
*Thursday, November 6, 2014 at 3:09pm*

**Math please help**

I am so confused on how to set this up then solve please help. For a rectangle with area 100 to have the smallest perimeter what divisions should it have? Would I use 2L+2W=P, A=xy, or what. I know it is probably something really simple and I am just not seeing it.
*Thursday, November 6, 2014 at 3:02pm*

**math**

if the difference in the degree measure of an interior and exterior angle of a regular polygon is 100 degree,how many sides doesthe poygon have??
*Thursday, November 6, 2014 at 2:14pm*

**Math**

Larry purchased a ski lodge in Telluride for $850,000. His bank is willing to finance 70% of the purchase price. As part of the mortgage closing costs, Larry had to pay 4% discount points. How much did this amount to?
*Thursday, November 6, 2014 at 1:05pm*

**math**

Gina wants to use a board that is 8 feet long to make a ramp. She wants the ramp to be 6 feet wide. Her design is shown below. Which is closest to h, the height in feet Gina should use for the ramp according to her design? a. 10.0 b. 5.3 c. 2.0 d. 1.3
*Thursday, November 6, 2014 at 12:42pm*

**Math**

Use the properties of logarithms to rewrite and simplify the logarithmic expression. 1.) log(9/300) 2.) log2(4^2 x 3^4)
*Thursday, November 6, 2014 at 12:38pm*

**math**

tickets to a play cost 3 dollars a child and 5 for adults. theater wants at least 1500 in sales. find intercept and describe what each one represents?
*Thursday, November 6, 2014 at 11:31am*

**Math**

Use the simplex meth to solve the linear programming problem Maximize z = 8x1 + 2x2 Subject to: 4x1 + 3x2 < 11 X1 + 4x2 < 7 With x1 > 0, x2> 0
*Thursday, November 6, 2014 at 11:23am*

**math**

which number is a perfect cube a.7 b. 25 c. 66<---- d. 27
*Thursday, November 6, 2014 at 11:08am*

**Math**

Polluted water flows into a pond. The concentration of pollutant, c, in the pond at time, t, minutes is modeled by the equation c(t) = 9 - 90 000 (1/ 10 000 + 3t) a) When will the concentration of pollutant in the pound reach 6kg/m^3?
*Thursday, November 6, 2014 at 10:47am*

**Math**

I have a peice of lumber that is 18 feet long can 18 prices of lumber make 5 shelves
*Thursday, November 6, 2014 at 9:51am*

**Math**

Ursula wrote the sum 5.815 + 6.021 as a sum of two mixed numbers. A. What sum did she write? B. Compare the sum of the mixed numbers to the sum of the decimals.
*Thursday, November 6, 2014 at 5:54am*

**math**

A carpenter who is installing cabinets uses thin pieces of material called shims to fill gaps. The carpenter uses four shims to fill a gap that is 1.2 centimeters wide. Three of the shims are 0.75 centimeter, 0.125 centimeter, and 0.09 centimeter wide. What is the width of the...
*Thursday, November 6, 2014 at 5:47am*

**math**

The temperature x in °f is related to the temperature in °c by the relation c(x) = 5/9 (x-32).What is the slope of graph in (b)?
*Thursday, November 6, 2014 at 4:48am*

**Math**

x^2+6x+4 Complete the square Find the turning point of the equation
*Thursday, November 6, 2014 at 2:22am*

**math**

A repairman purchased several furnace-blower motors for a total cost of $150. If his cost per motor had been $5 less, he could have purchased 1 additional motor. How many motors did he buy at the regular rate?
*Thursday, November 6, 2014 at 1:33am*

**math**

If a number is added to the numerator of 5/6 and twice as much is added to the denominator, the result is 3/5 Find the number?
*Thursday, November 6, 2014 at 1:23am*

**math**

A dealer bought some radios for a total of $1,200. She gave away 6 radios as gifts, sold each of the rest for $10 more than she paid for each radio, and broke even. How many radios did she buy?
*Thursday, November 6, 2014 at 1:15am*

**math**

A sludge pool is filled by two inlet pipes. One pipe can fill the pool in 14 days and the other pipe can fill it in 22 days. However, if no sewage is added, waste removal will empty the pool in 35 days. How long will it take the two inlet pipes to fill an empty pool? answer
*Wednesday, November 5, 2014 at 11:53pm*

**math**

Carl shades a row in the multiplication table the product in the row are all even the ones digits in the products repeat 0,4,8,2,6 what row does carl shades
*Wednesday, November 5, 2014 at 11:43pm*

**Math**

You are measuring walnuts for banana walnut oatmeal and a spinach and walnut salad. You need 3/8 cup of walnuts for the oatmeal and 3/4 cup of walnuts for the salad. You have a 1/4-cup scoop. Describe two different ways to find how many scoops of walnuts you will need. PLEASE ...
*Wednesday, November 5, 2014 at 10:45pm*

**please help, math question**

A matte of uniform width is to be placed around a painting so that the area of the matted surface is equal to the area of the painting. If the dimensions of the painting are 15 cm and 10 cm, find the width of the matte. The answer is supposed to be 2.5 cm but I keep getting 12.5.
*Wednesday, November 5, 2014 at 10:20pm*

**Math**

An ostrich. An run at a rate of 50 miles every 60 minutes. At this rate how long will it take an ostrich 15 miles?
*Wednesday, November 5, 2014 at 9:45pm*

**Math **

i am thinking a number the number in the tens is less than the number in ones.
*Wednesday, November 5, 2014 at 9:31pm*

**Math**

Find the payment necessary to amortize a 8% loan of $1700 compounded quarterly, with 11 quarterly payments?
*Wednesday, November 5, 2014 at 9:21pm*

**Math**

A jet flies at an altitude of 52,800 feet. What is the height of the jet in miles? I need help with this problem please
*Wednesday, November 5, 2014 at 9:20pm*

**Math**

Carl has 5/6 yard long, 1/4 yard long, and 2/3 yard long of cable wire. After Carl used 1 yard how much cable wire would he have?
*Wednesday, November 5, 2014 at 9:20pm*

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