Sunday

April 19, 2015

April 19, 2015

**Branches of Math**

**Recent Math Questions**

**Math**

Given the equation K 8= 10 Solve for k
*Wednesday, February 25, 2015 at 5:56pm*

**math**

Which algebraic equation models the English sentence, a number subtracted from 8 is equal to 4? A. 8 − x = 4 B. x − 8 = 4 C. 8 − 4 = x D. x − 4 = 8
*Wednesday, February 25, 2015 at 5:47pm*

**Math**

Which of the sentences below could represent 4 ÷ p = 2? A. Four divided by two is equal to a number. B. Four divided by a number is equal to two. C. A number divided by four is equal to two. D. Four times a number is equal to two.
*Wednesday, February 25, 2015 at 5:47pm*

**math**

Which of the following algebraic equations models the English sentence, a number decreased by two is equal to four? A. w + 2 = 4 B. 2 − w = 4 C. w − 2 = 4 D. w = 2 − 4
*Wednesday, February 25, 2015 at 5:46pm*

**math**

If you formed an algebraic equation to model the sentence, three times a number is equal to nine, how many variables would be in the equation? A. 1 B. 2 C. 3 D. 5
*Wednesday, February 25, 2015 at 5:46pm*

**Math**

A wooden board is 12 feet long. If you cut the board into 1 1/2 foot sections, how many sections will you end up with?
*Wednesday, February 25, 2015 at 5:35pm*

**Math**

Ms.Li spent $840 on a vacation. She spent 2/3 of the amount on a train ticket and 1/2 of the remaining amount on food. how much did she spend on the ticket and food together?
*Wednesday, February 25, 2015 at 5:07pm*

**math**

Which of the following subsets of the vector space Mnn are subspaces? (a) The set of all n × n symmetric matrices (b) The set of all n × n diagonal matrices (c) The set of all n × n nonsingular matrices
*Wednesday, February 25, 2015 at 4:25pm*

**Urgent math help**

what is the x intercept y = -5x+20
*Wednesday, February 25, 2015 at 4:18pm*

**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 ...
*Wednesday, February 25, 2015 at 4:14pm*

**Math (Ratios and Similar Polygons)**

a baseball team played 140 regular season games. The ratio of the number of games they won to the number of games they lost was 3 - 4 how many games did they win? how many games did they lose? I just need help on a better way of understanding it.
*Wednesday, February 25, 2015 at 4:02pm*

**math**

A number K increased by 10 is the same as 24 How would you write this as an equation
*Wednesday, February 25, 2015 at 4:00pm*

**math**

I don't get this I've been absent for 3 weeks On a math quiz Mary score 3 points for each of the 12 multiple-choice question she answered correctly and five points for each of the eight free response question she answered correctly. What was the total number of points ...
*Wednesday, February 25, 2015 at 3:43pm*

**math**

john told raquel that if he spent up to $30 from his saving account, his savings account would have 3/4 as much in it as it has now. From John's statement, raquel can deduce that the least amount of money that john could have in his savings account now is what?
*Wednesday, February 25, 2015 at 3:33pm*

**Math**

Find the sum of the interior angles of a nonagon. (1 point) 140° 1,620° 1,260°------ 1,450° My teacher showed this question and she explained the answer was the 3rd one but i just dont get it
*Wednesday, February 25, 2015 at 3:16pm*

**math**

I need a little help on my math.Lesson 5: Square Roots and Irrational Numbers Math 7 B Unit 2: Measurement. on CONNECTIONS ACADEMY. PLEASE :-(
*Wednesday, February 25, 2015 at 2:31pm*

**math**

OQRS IS A QUADRILATERAL SUCH THAT OQ= -6,3 OR= -3,7 AND OS 1,5. T IS THE POINT ON OQ SUCH THAT OT:TQ= 2:2. PROVE QRST IS A PARALLELOGRAM
*Wednesday, February 25, 2015 at 2:30pm*

**Math**

What is the approximate volume of a sphere with a radius of 7.16 cm? Use 3.14 to approximate pi and round your answer to two decimal places.
*Wednesday, February 25, 2015 at 1:59pm*

**math**

A vector can be used to represent the path of a drill tip used to bore a deep mine shaft in Sudbury one quarter of the way to the centre of the Earth. Represent the vector using a directed line segment and Cartesian co-ordinates and describe which representation may be more ...
*Wednesday, February 25, 2015 at 1:46pm*

**Math SO HARD :C**

Ah! This is so hard! From midnight to 6:00 am the temperature rose 8 degrees C. At 6:00 am the temperature was -20 degrees C. What was the temperature at midnight? It's supposed to involve integers...
*Wednesday, February 25, 2015 at 12:57pm*

**Math**

Ah! This is so hard! From midnight to 6:00 am the temperature rose 8 degrees C. At 6:00 am the temperature was -20 degrees C. What was the temperature at midnight? It's supposed to involve integers...
*Wednesday, February 25, 2015 at 12:56pm*

**Algebra 2**

D'Andre has decided that he needs to get more exercise, so he is building a running regimen for himself. He decides that, beginning on Sunday, he'll fun 10 feet. On each subseqeunt day he'll double the distance he ran the previous day. So he'll run 20 feet on ...
*Wednesday, February 25, 2015 at 12:50pm*

**Algebra 2**

D'Andre has decided that he needs to get more exercise, so he is building a running regimen for himself. He decides that, beginning on Sunday, he'll fun 10 feet. On each subsequent day he'll double the distance he ran the previous day. So he'll run 20 feet on ...
*Wednesday, February 25, 2015 at 11:52am*

**math**

Two cups, two plates, and a pot cost $10.20 at a garage sale. A cup costs twice as much as a plate. The pot costs $3 more than a cup. What is the price of the pot? Explain how you got your answer.
*Wednesday, February 25, 2015 at 11:07am*

**College Math (Calculus)**

Suppose the length of a rectangular box, with lengths x,y,z are changing at the following rates dx/dt = 2 cm /sec dy/dt = -3 cm /sec dz/dt = 1 cm/ sec when x =4, y=3 z=2, Find i) Rate at which volume is changing wrt time, ii) Rate at which the diagonal length of the box is ...
*Wednesday, February 25, 2015 at 11:00am*

**math**

Which equation is a function of x?
*Wednesday, February 25, 2015 at 10:54am*

**Math**

1. Scale is 1 in.= 3 ft. If the room is 8 inches long and 2 inches wide on a blueprint, how much will it costs to clean the carpet if the costs is $15 per square foot?
*Wednesday, February 25, 2015 at 10:43am*

**My Grades**

My math grade is an B+ should I do a retake for extra credit? This will consist of extra credit opportunity's in portfolios and test. Thank you very much! -Emolga
*Wednesday, February 25, 2015 at 10:36am*

**math**

If Lwandi got her test back and was very happy because she got 85%. To get full marks she needed to get 60 marks. How many marks did she lose?
*Wednesday, February 25, 2015 at 10:31am*

**math**

If Lwandi got her test back and was very happy because she got 85%. To get full marks she needed to get 60 marks. How many marks did she lose?
*Wednesday, February 25, 2015 at 10:30am*

**math**

what is the total investment after 2 years if 400$ at 9% is compounded semi-annually for 2 years
*Wednesday, February 25, 2015 at 10:29am*

**Math**

Two cups, two plates, and a pot cost $10.20 at a garage sale. A cup costs twice as much as a plate. The pot costs $3 more than a cup. What is the price of the pot? Explain how you got your answer.
*Wednesday, February 25, 2015 at 10:22am*

**math**

A snial crewls at 5.0 cm/min. what ia the snail's pace in feet per second
*Wednesday, February 25, 2015 at 10:05am*

**math**

Find the mean of the following set of data. Round your answer to two decimal places. 13, 11, 4, 5, 6, 9, 10, 12, 15, 16
*Wednesday, February 25, 2015 at 9:32am*

**Math**

IF A PERSON TRAVELED 4200 MILES IN 6 HOURS. HOW MANY MPH WERE THEY GOING?
*Wednesday, February 25, 2015 at 9:23am*

**Math- Calc 1**

1. At what point does the normal line to the curve x^2 - XY + Y^2 = 3 at the point (-1,1) intersect the curve again? 2. Find the constants A, B so that if Y=A*sin X + B cos X, then Y satisfies the differential equation Y" + 2Y = 0. 3. Find the points on he graph of Y = e^...
*Wednesday, February 25, 2015 at 8:52am*

**Math**

jack was one third as young as her grandmother 15 years ago if the sum of their ages is now 110 how old is jacqueline grandmother
*Wednesday, February 25, 2015 at 8:41am*

**math**

If √6 is the geometric mean between 6 and another number, then the number is: 1 2 6
*Wednesday, February 25, 2015 at 8:39am*

**Homework (Math)**

I know that I'm using the Law of Cosines, but I'm confused on how to solve. I have to also round my answers to the nearest tenth for degrees and to the nearest hundredth for sides. Given: A= 55 degrees b=3 c=10 Find: a= B= C=
*Wednesday, February 25, 2015 at 7:58am*

**Math Check**

Can someone check to see if I'm right? Thanks! Question: Determine if v and w are equal If v = Ray AB and w = Ray CD, where A (23, 11), B (10, 15), C (13, 15), and D (0, 11. (True or False) My answer: False
*Wednesday, February 25, 2015 at 7:58am*

**Math**

Which of the following correctly lists angle pairs that have the same sums of 180 degrees & 90 degrees? A. adjacent angles, congruent angles B. complementary angles, vertical angles C. supplementary angles, complementary angles*** D. vertical angles, adjacent angles Is it C?
*Wednesday, February 25, 2015 at 2:41am*

**Math**

An angle measures 47 degrees. What are the measures of the angle's complement and supplement? A. complement, 43 (degrees), supplement, 133 B. complement, 133, supplement, 43 C. complement, 53, supplement, 143 D. complement, 143, supplement, 53 I'm not sure of the ...
*Wednesday, February 25, 2015 at 2:38am*

**math**

Rodney and josiah each bought a package of the same kind of cookies at the store . Rodney ate 1/2 package of cookies on monday and 1/3 of the same package on tuesday. Josiah ate 5/12 of his packsge on monday and 1/2 of the package ontuesday. Who ate more? How much more?
*Wednesday, February 25, 2015 at 1:23am*

**math**

Beth walked 1/3 of a mile from her house to her friends house, 1/4 of a mile to the post office, and then anotjer 1/2 mile from the post office bsck home. How far did beth walk?
*Wednesday, February 25, 2015 at 1:15am*

**Math Alg. 2 **

Write a recursive rule for the sequence: 1,2,12,56,272... and 2,5,11,26,59... and -3,-2,5,-3,-2... I can't find the pattern in these and am unsure on how to write the rule. Thanks
*Wednesday, February 25, 2015 at 1:12am*

**Math Algebra**

Explain why there are not a function f and an initial value x(sub)0, such that a function's first three iterates are x1=2, x2=2, and x3=8.
*Wednesday, February 25, 2015 at 1:08am*

**Math**

What is the unit rate of ounces. A hint is 48 ounces cost costs 3.00 dollars. I divided 48 by three but and got 16 cents but when I multiply by 48 it doesn't equal 3 dollars
*Wednesday, February 25, 2015 at 12:27am*

**Math- Calc 1**

1. At what point does the normal line to the curve x^2 - XY + Y^2 = 3 at the point (1,1) intersect the curve again? 2. Find the constants A, B so that if Y = Asin X = B cos X, then Y satisfies the differential equation Y" + 2Y = 0. 3. Find the points om he graph of Y - e^...
*Tuesday, February 24, 2015 at 11:51pm*

**math 050**

a piece of wire to 2/7 m long to be cut into 6 pieces of the same length what is the length of each piece
*Tuesday, February 24, 2015 at 11:43pm*

**Math **

Gordon Moore stated that the number of transistors that can be placed on an integrated circuit will double every 2 years. This trend is known as Moore's Law. In 1978, the Intel 8086 held 29,000 transistors on an integrated circuit. a. Write a function that represents Moore...
*Tuesday, February 24, 2015 at 11:30pm*

**Homework Help (Math)**

Write your answer in <x,y> for the following question: If x=<6,-21>, then 1/3x.
*Tuesday, February 24, 2015 at 10:49pm*

**Math Check**

Hi! Can someone check this for me? Thanks! Question: Determine if v and w are equal If v = Ray AB and w = Ray CD, where A (23, 11), B (10, 15), C (13, 15), and D (0, 11. (True or False) My answer: False
*Tuesday, February 24, 2015 at 10:48pm*

**Math Work**

I know that I'm using the Law of Cosines, but I'm confused on how to solve. I have to also round my answers to the nearest tenth for degrees and to the nearest hundredth for sides Given: A= 55 degrees b=3 c=10 Find: a= B= C=
*Tuesday, February 24, 2015 at 10:46pm*

**Math - Algebra 1**

The number of concert tickets sold doubles every hour. After 12 hours, all of the tickets are sold. After how many hours are about one-fourth of the tickets sold? Explain your reasoning.
*Tuesday, February 24, 2015 at 10:39pm*

**math**

3x+4=19 X=5 5+C/9=31 C=-324 11=2Y-15 Y=13
*Tuesday, February 24, 2015 at 10:13pm*

**Math**

19>-n/5+9
*Tuesday, February 24, 2015 at 10:02pm*

**math**

A coin bank contains $2.80 in dimes and quarters. The bank contains the same number of each coin. How many of each coin does the bank contain. I have to write an expression.
*Tuesday, February 24, 2015 at 9:56pm*

**math**

The ratio is 2:7>their mom gives each of them the 15 marbles and now David has twice as many marbles as Charlie.How many marbles does each boy have
*Tuesday, February 24, 2015 at 9:40pm*

**math**

A rectangle has an area of 48 square feet and a length of 10 feet. What is its width?
*Tuesday, February 24, 2015 at 9:36pm*

**math**

A length of string that is 22 feet long is being cut into piece that are 1/3 foot long. How many pieces will there be?
*Tuesday, February 24, 2015 at 9:16pm*

**math**

A computer store charges a $40 service fee plus $35 for each hour it takes to repair a computer. Write an expression that gives the total cost of a repair that takes h hours. 40+35h A fitness club charges a $100 activation fee and $33 for each month. Write an expression for ...
*Tuesday, February 24, 2015 at 9:14pm*

**math**

a box contains 3 red marbles, 4 white marbles and 5 yellow marbles.find the probability that a red marble and then a yellow marble to be pick up on two successives drawing then there is a replacement of the marbles
*Tuesday, February 24, 2015 at 9:11pm*

**Math**

6+9r-4(3r-7)
*Tuesday, February 24, 2015 at 8:41pm*

**math**

Answers (not puzzle, math answers) to what do you call it when someone pays back a quick loan. I know the answer is a sudden debt pay off i need help writing them out(math part).
*Tuesday, February 24, 2015 at 8:38pm*

**math**

-32 is less than or equal to 24-2f
*Tuesday, February 24, 2015 at 8:36pm*

**math**

A store sells one model of bicycle for $250. a. Write an expression for the amount of money the store receives if it sells b bicycles. b. How much would the store make if it sells 5 bicycles.
*Tuesday, February 24, 2015 at 8:30pm*

**math**

2y-3(-2y-4y+5)
*Tuesday, February 24, 2015 at 8:23pm*

**math**

Brian cut an extra large round pizza into 8 pieces. Seven of th pieces were eaten. What angle measures of pizza is left?
*Tuesday, February 24, 2015 at 8:17pm*

**math**

75=m/3+10
*Tuesday, February 24, 2015 at 8:16pm*

**math**

Consider the Standard Normal curve: (a) Find the area between z = -0.45 and z = 1.45 (b) Find the value of z such that the area to the right of z is 1.5%.
*Tuesday, February 24, 2015 at 8:05pm*

**Math**

Describe how to rename an improper fraction as a mixed number. Use an example to explain. I don't get the "renaming" part. Does it mean to explain how to convert it?
*Tuesday, February 24, 2015 at 7:43pm*

**math**

The perimeter of a rectangular window is 634 inches. If the length of the window is 205 inches, what is the width of the window? Is the answer 112 inches?
*Tuesday, February 24, 2015 at 7:13pm*

**Math**

Look for the angle (θ) between the vectors. Remember to round your answer to the nearest tenth. a.) u=<3,2> v= <4,0> b.) u = 2i - 3j v = i - 2j
*Tuesday, February 24, 2015 at 6:43pm*

**math**

The accompanying tree diagram represents a two-stage experiment. (Let x = 0.3, y = 0.7, r = 0.55, s = 0.45, t = 0.55, and w = 0.45.) (a) Find P(A) · P(D | A). Correct: Your answer is correct. (b) Find P(B) · P(D | B). Incorrect: Your answer is incorrect. (c) Find...
*Tuesday, February 24, 2015 at 6:34pm*

**maths**

mrs. brittle is planning a party for all students who get a level 3 or 4 on math test.using a total of $112.00 she plans to get a pizza that costs $12.00 each and drinks that $0.50 each. if she purchases four times as many as pizzas how many of each should she buy ?
*Tuesday, February 24, 2015 at 6:20pm*

**maths**

mrs. brittle is planning a party for all students who get a level 3 or 4 on math test.using a total of $112.00 she plans to get a pizza that costs $12.00 each and drinks that $0.50 each. if she purchases four times as many as pizzas how many of each should she buy ?
*Tuesday, February 24, 2015 at 6:19pm*

**MATH I HATE problem solving~ms sue and others plz **

Mateo played the same card game that Jill played. (other story problem red cards r - and yellow cards r +) He drew some cards. After he drew 7 red cards, he gave back 2 yellow cards. His final score was -3. What was his score before he drew the 7 red cards?
*Tuesday, February 24, 2015 at 5:50pm*

**MATH**

from 6:30 am to 4:30 pm on Monday, the temperature rose 12 degreesC. From 4:30 pm on Monday to 5:45 am on Tuesday, the temperature dropped 7 degreesC. The temperature at 5:45 am on Tuesday was -2 degreesC. What was the temperature at 6:30 am on Monday? plz i need ur help this ...
*Tuesday, February 24, 2015 at 5:36pm*

**math**

How would i simplify this: (x-1)(x+2)-(x-3)^2 I keel getting -3 -11, but the right answer is 7x - 11
*Tuesday, February 24, 2015 at 5:22pm*

**math**

11/21 or 9/17. which one is greater and what is the work/common denominaters
*Tuesday, February 24, 2015 at 5:14pm*

**MATH AGAIN~Ms. Sue **

from 4:00 P.M. to 3:00 A.M., the temperature dropped 6 degrees Fahrenheit. At 3:00 A.M.,the temperature was -4 degrees F. What was the temperature at 4:00 P.M.??? Ms. Sue i trust u more plz answer this thank u
*Tuesday, February 24, 2015 at 5:05pm*

**Math - Algebra 1**

You deposit $9000 in a savings account that earns 3.6% annual interest compounded monthly. You also save $40 per month in a safe at home. Write a function C(t) = b(t) + h(t) where b(t) represents the balance of your savings account and h(t) represents the amount in your safe ...
*Tuesday, February 24, 2015 at 5:03pm*

**Math**

Which of the following makes the sentence true? 7t + 26=61 (3,5,7,9)
*Tuesday, February 24, 2015 at 4:46pm*

**MATH**

What does MORE THAN mean does it mean + or */times? a. + b. */times
*Tuesday, February 24, 2015 at 4:42pm*

**Math**

Irene counted 12 brown houses in her neighborhood. The 12 houses represent 16% of her neighborhood. How many houses are in her neighborhood.
*Tuesday, February 24, 2015 at 4:40pm*

**MATH**

What does 0 plus 0.7 minus 0.1111111118 =
*Tuesday, February 24, 2015 at 4:35pm*

**Math**

A rental car company charges a fixed fee of $15.00 plus $.12 per mile. Write an equation to find the total cost, y, for any number of miles, x
*Tuesday, February 24, 2015 at 4:30pm*

**math**

what is -33 plus y equals -39 minus +87
*Tuesday, February 24, 2015 at 4:19pm*

**Math**

Hello! I need help with this question. I know that I'm using the Law of Sines, but I'm confused on how to solve. I have to also round my answers to the nearest tenth for degrees and to the nearest hundredth for sides. Thanks! Given: A = 60 degrees a = 9 c = 10 Find: b...
*Tuesday, February 24, 2015 at 3:46pm*

**Math**

So I'm just having a complete mind block. I found my answer which is 13.72. It says to round to the nearest 10th. So I have two options here I guess haha. 13.7 or 14. I can't decide which though. Could someone please help?
*Tuesday, February 24, 2015 at 3:28pm*

**Computers**

1) What is the purpose of computer simulations? A. to provide virtual hands-on experience when actual hands-on experience is not possible*** B. to provide an online version of a printed text C. to provide clip art about the subject being studied D. to provide a real life hands...
*Tuesday, February 24, 2015 at 1:19pm*

**Math/ Compouded semiannually ?'s**

Jessica plans to purchase a car in one year at a cost of $30,000. How much should be invested in an account paying 10% compounded semiannually to have the funds needed. a. $27,210.90 b. $3,512.06 c. $24,793.50 d. $27,272.70 The Lee family plans to buy a new house in 2 years ...
*Tuesday, February 24, 2015 at 12:11pm*

**math**

An airplane travels with a speed of 145 mph in calm air. the wind is blowing with a velocity of 23 mph from N72degreesE. If the plane is headed in a direction N63W, find the magnitude of the speed and the direction of the airplane with reference to the ground. In what ...
*Tuesday, February 24, 2015 at 12:07pm*

**math**

Kim and Kent are on opposite sides of a canal, pulling a barge with tow ropes. Kim exerts a force of 50N at 20 degrees to the canal and Kent pulls at an angle of 15 degrees with just enough force so that the resultant force vector is directly along the canal. Find the number ...
*Tuesday, February 24, 2015 at 12:01pm*

**Math homework **

Alex can read 8 pages in 20 minutes. How long will it take him to read 20 pages?
*Tuesday, February 24, 2015 at 11:07am*

**math**

(1,1) and (13,3) (0,4) and (14,0) What are the coordinates for the intersection of the two lines?
*Tuesday, February 24, 2015 at 10:26am*

**math**

An oval track is made by erecting semi circles on each end of a 58 m by 116 m rectangle. Find the length of the track and the area enclosed by the track.
*Tuesday, February 24, 2015 at 7:57am*

**business math**

A local Barnes and Noble paid a $79.44 net price for each calculus textbook. The publisher offered a 20% trade discount. What was the publisher’s list price?
*Tuesday, February 24, 2015 at 6:43am*

**math**

Use the information below to write and simplify an expression to find the total weight of the medals won by the top medal-winning nations in the 2012 London Olympic Games. The three types of medals have different weights. U.S.A. Gold=46 Silver=29 Bronze=29 China Gold=38 Silver...
*Tuesday, February 24, 2015 at 5:56am*

**math**

William earns $13 an hour working at a movie theater. Last week he worked h hours at the concession stand and three times as many hours at the ticket counter. Write and simplify an expression for the amount of money William earned last week. THANK YOU!
*Tuesday, February 24, 2015 at 5:43am*