Friday

February 27, 2015

February 27, 2015

**Branches of Math**

**Recent Math Questions**

Post a New Question | Current Questions

**Math Probability Outcome **

A drawer contains 8 white socks and 5 black socks if two socks are chosen and you get 2 pair of white socks what is the probability outcome???
*Monday, February 9, 2015 at 5:46am*

**Math Probability Outcome **

A drawer contains 8 white socks and 5 black socks if two socks are chosen and you get 2 pair of white socks what is the probability outcome???
*Monday, February 9, 2015 at 5:45am*

**math**

They're 32 more apples than oranges at a fruitstand. Howany apples and oranges could there be?
*Monday, February 9, 2015 at 4:43am*

**math**

You will receive Sh. 20,000 five years from now. The discount rate is 8 percent. What is the value of your investment today?
*Monday, February 9, 2015 at 4:08am*

**Math**

1. The ratio of the number of dimes to the number of pennies in a purse is 3 to 4. If 3 pennies are taken out of the purse, the number of dimes and the number of pennies in the purse will be equal. How many dimes are in the purse? (Answer key says 9- and if I multiply the ...
*Monday, February 9, 2015 at 3:11am*

**Math**

1. At a basketball game, the ratio of the number of freshmen who attended to the number of juniors who attended was 3 to 4. The ratio of the number of juniors who attended to the number of seniors who attended was 7 to 6. What was the ratio of the number of freshmen to the ...
*Monday, February 9, 2015 at 2:27am*

**math **

Find two numbers (exactly) whose product is 10 and whose sum is 18.
*Monday, February 9, 2015 at 1:52am*

**math**

A and B are twos 360 km apart. An express bus departs from A at 8 a.m. and maintains an average speed of 90 km/h between A and B. Another bus starts From B also at 8.m. and moves towards A making four stops at four equally spaced points between B and A. Each stop is of ...
*Monday, February 9, 2015 at 1:03am*

**math**

Solve the equation cos (3θ +120°) = √(3 /2 for 0° ≤ θ≤ 180°
*Monday, February 9, 2015 at 12:58am*

**math**

The radius of circle is given as 2.8 cm to 2 significant figure (a) If C is the circumference of the circle, determine the limits between which C/π lies. (b) By taking π be 3.14; find to 4 significant figures the line between which the circumference lies
*Monday, February 9, 2015 at 12:56am*

**math**

A cylinder container of radius 15 cm has some water in it. When a solid submerged into the water, the water level rises 1.2 cm. (a) Find, the volume of the water displace by the solid leaving your answer in terms of π (b) If the solid is a circular cone of the height 9 cm...
*Monday, February 9, 2015 at 12:50am*

**math**

A quantity T is partly constant and partly varies as the square root of s. a) Using constant a and b, write down an equation connecting T and S. b) If S = 16, and when T = 24 and S = 36 when T = 32, find the value of the constants a and b.
*Monday, February 9, 2015 at 12:07am*

**math **

trying to help the kid with hw but not smart enough. please help. Thank You! -(5/7) ^ -2/5 can be written as -(a)^b where "a" is a positive rational number that is greater than 1 and "b" is a positive rational number that is less than 1. Find 'a' ...
*Sunday, February 8, 2015 at 11:55pm*

**math**

A point is directly below a window. Another point B is 15 m from A and at the same horizontal level. From B angle elevation of the top of the bottom of the window is 300 and the angle elevation of the top of the widow is 350. Calculate the vertical distance. (a) From A to the ...
*Sunday, February 8, 2015 at 11:53pm*

**Math **

Solve the system of linear equations by substitution: 1.) y=2x+3 y=3x+5 2.) y=1/3x+2 y=1/6x+4
*Sunday, February 8, 2015 at 11:34pm*

**math**

if you were to sketch a circle graph for a data. what fraction of the circle would represent food and the food $450
*Sunday, February 8, 2015 at 11:27pm*

**math**

Tuition of $1762 will be due when the spring term begins in 8 months. What amount should a student deposit today, at 5.47%, to have enough to pay the tuition?
*Sunday, February 8, 2015 at 10:53pm*

**math**

The third and fifth term of an arithmetic progression are 10 and-10 respectively. a)Determine the first and the common difference t3 = a + 2d = 10 t5 = a + 4d = -10 -a -2d = -10 a + 4d = -10 2d = -20 d = -10 a + 2(-10) = 10 a -20 = 10 a = 30; d = -2 b)The sum of the first 15 ...
*Sunday, February 8, 2015 at 10:41pm*

**Math**

Find all the solutions of the equation in the interval {o,2pi) sec^2x+tanx=1
*Sunday, February 8, 2015 at 10:38pm*

**math**

A lamp that normally sells for $35 is on sale for 35% off. How much will the lamp cost after a 8% sales tax?
*Sunday, February 8, 2015 at 9:48pm*

**Business Math**

Ms. Hardin invested $60,000 in three stocks. The first year, stock A paid 7% dividends and increased 4% in value; stock B paid 8% dividends and increased 5% in value; stock C paid 9% dividends and increased 3% in value. If the total dividends were $4620 and the total increase ...
*Sunday, February 8, 2015 at 8:43pm*

**Math**

If a and b are positive numbers, find the maximum value of f(x)=x^a(1−x)^b, 0≤x≤1 Your answer may depend on a and b.
*Sunday, February 8, 2015 at 8:36pm*

**Math**

Leena bakes a loaf of bread. She eats 1/8 of the loaf and gives 1/6 of it to each of her 3 friends. What fraction of the loaf of bread is left?
*Sunday, February 8, 2015 at 8:32pm*

**Math 1105**

if two identical squares have a total area of 18x^2+36x+18, find the length of one side of one of the squares
*Sunday, February 8, 2015 at 8:23pm*

**math**

what was the answer that i posted to you about if you subtract the tens digit from the ones digit.
*Sunday, February 8, 2015 at 8:07pm*

**Math**

identify the conditions on x that make the following statement true, if they can be made true at all: 9^x > 1 9^x < 1 9^x = 1 9^x = 0 9^x < 0 what is the question asking for?
*Sunday, February 8, 2015 at 7:56pm*

**math**

what is the answer for the question I posted!!!!!!!!!!!!!!!
*Sunday, February 8, 2015 at 7:45pm*

**Math**

A jet pilot is making a 1000 mile trip in her military Tomcat. She flies 800 mph for one hour and decides she wants to finish the trip so that she would have flown at an average of 1000 mph. How fast should she go to finish the trip and meet her goal?(Hint: Think carefully ...
*Sunday, February 8, 2015 at 7:14pm*

**math**

Let x1,x2,x3 be random sample with pdf f(x)=exp(-x),x>0 find the joint pdf of y1=x1/x2, y2=x3/(x1+x2),y3=x1+x2 find pdf of y1 Are y1,y2,y3 independent?
*Sunday, February 8, 2015 at 7:05pm*

**math**

Let x1,x2,x3 be random sample with pdf f(x)=exp(-x),x>0 find the joint pdf of y1=x1/x2, y2=x3/(x1+x2),y3=x1+x2 find pdf of y1 Are y1,y2,y3 independent?
*Sunday, February 8, 2015 at 7:05pm*

**math**

let X1,X2,X3 be random sample with pdf f(x)=exp(-x),x>0,find the joint pdf of Y1=X1/X2, Y2=X3/(X1+X2) ,Y3=X1+X2, and find pdf of Y1. Are Y1,Y2,Y3 independent?
*Sunday, February 8, 2015 at 6:57pm*

**math**

let X1,X2,X3 be random sample with pdf f(x)=exp(-x),x>0,find the joint pdf of Y1=X1/X2, Y2=X3/(X1+X2) ,Y3=X1+X2, and find pdf of Y1. Are Y1,Y2,Y3 independent?
*Sunday, February 8, 2015 at 6:57pm*

**math**

This problem is about pizza. You have a circular pizza and you want to slice it with n straight cuts into the maximum number of pieces possible (not necessarily all of the same size). Let Pn = this maximum number of pieces you can slice a pizza into with n cuts. Examples are ...
*Sunday, February 8, 2015 at 6:52pm*

**math**

Below is a sequence an, for n = 0, 1, 2, ... n 0 1 2 3 4 5 6 7 8 9 an 25 25 19 25 61 145 295 529 865 1321 Use the method of finite differences to find a closed formula for this sequence.
*Sunday, February 8, 2015 at 6:50pm*

**Math**

Find all pairs of integers whose difference is 5 and product is 234.
*Sunday, February 8, 2015 at 6:33pm*

**Vectors and Math**

Find x, y, and z if 2(x,-1,4)-3(-4,y,6)-1/2(4,-2,z)=(0,0,0) What I did: (2x,-2,8)-(-12,3y,18)-(2,-1,1/2z)=(0,0,0) (2x-14,-1-3y,-10-1/2z)=(0,0,0) Textbook answer is -5, -1/3, -20
*Sunday, February 8, 2015 at 5:58pm*

**Math**

The sum of two counting numbers is 243. Half of one number is four times the other number. What are the numbers? 121.1+122.2=243.2
*Sunday, February 8, 2015 at 5:40pm*

**math**

A recipe for 1 batch of muffin included 2/3 cup of raisins. Ina made 2 1/2 batches of muffins. How many cups of raisin did she use. Is the answer 1 5/6
*Sunday, February 8, 2015 at 5:26pm*

**math**

jeff has a big scoop of ice cream that is 10 inches tall it melts by 25% in a minute whats the height of the ice cream after one minute
*Sunday, February 8, 2015 at 4:13pm*

**math **

use these 5 digits to make 24 0-1-2-3-4 Use each digit only once. record how you made 24
*Sunday, February 8, 2015 at 4:13pm*

**Math**

Expand then collect like terms: 3(x + 2) + x + 2
*Sunday, February 8, 2015 at 4:11pm*

**math **

jeff has a big scoop of ice cream that is 10 inches tall. it melts by 25%in a minute.whats the height of the ice cream after one minute
*Sunday, February 8, 2015 at 4:10pm*

**finite math**

Recall from Example 1 that whenever Suzan sees a bag of marbles, she grabs a handful at random. She has seen a bag containing three red marbles, five green ones, four white ones, and three purple ones. She grabs eight of them. Find the probability of the following event, ...
*Sunday, February 8, 2015 at 3:33pm*

**Math**

Jenny was planting flowers for her garden. She had to plant 4 rose flowers for every jasmine flower she planted. If she plants 100 flowers in all, how many will be jasmine flowers?
*Sunday, February 8, 2015 at 3:19pm*

**Math**

There are 750 students in a school. If the number of girls is 120 more than the boys, how many boys are there in the school?
*Sunday, February 8, 2015 at 3:04pm*

**math **

Gabe went to the amusement park with $40 to spend. His ticket cost $26.50. Write and solve an inequality to show how much he might spend on souvenirs and snack. Please tell me how you got this answer to this question.
*Sunday, February 8, 2015 at 3:01pm*

**6th grade math **

To qualify for a store discount, Clay's soccer team must spend at least $560 for new jerseys. The team needs 20 jerseys. Write and solve an inequality to represent how much the team should spend on each jersey to qualify for the discount.
*Sunday, February 8, 2015 at 2:32pm*

**Math (Pre-Calc)**

Find all the solutions of the equation in the interval {o,2pi) 5sqrt3 tan x+3=8sqrt3 tan x
*Sunday, February 8, 2015 at 2:16pm*

**Math**

Hi! My teacher told my class that the answer to this question is "1-sin x/cosx" but she wants us to figure out why. I tried solving it but I didn't end up with the answer given. Can someone help me? Thank you! Problem: cos x/1+sinx
*Sunday, February 8, 2015 at 2:15pm*

**algebra**

A math class has a total of 47 students. the number of females is 17 less than the numberof males. how many males and how many females are in class?
*Sunday, February 8, 2015 at 2:11pm*

**math**

Samuel bought three cups and four spoons for Kshs 324. Daniel bought five cups and Mary bought two sppons of the same type as those bought by Samuel. Daniel paid Kshs 228 more than Mary. Find the price of each cup and spoon.
*Sunday, February 8, 2015 at 2:07pm*

**math algebra 8**

Jim creates mixtures for new candies. His boss gives him 20 pounds of 12% milk powder, and 32 pound of 20% milk powder. How many pounds of 12% milk powder jim uses if Boss wants him make 30 pounds of 18% milk powder for candies. Please help to answer , and formula also thanks
*Sunday, February 8, 2015 at 2:05pm*

**4th grade math fraction**

How do I show the work to find the fraction with the greatest value? 7/10, 1/5, 9/10 5/6, 7/12, 7/10
*Sunday, February 8, 2015 at 1:59pm*

**Math**

This is trigonometry: A tree's height is unknown so we have to solve for the height of the tree. The tree casts a 11m shadow. And the angle of the triangle is 36 degrees.
*Sunday, February 8, 2015 at 1:49pm*

**math**

A bag contains 5 red and 4 green apples. Michael takes one apple at random from the bag. His sister Ashley then takes an apple at random from he bag. What is the probability that the two apples are the same colour? Can you explain to me how to do this please? Do I need a ...
*Sunday, February 8, 2015 at 1:46pm*

**math**

Two towns P and Q are 400 km apar. A bus left for P and Q. It stopped at Q for one hour and then started the return to P. one hour after the departure of the buse from P, a trail also heading for Q left P. the trailer meth the returning bus ¾ of the way from P to Q. ...
*Sunday, February 8, 2015 at 1:43pm*

**math**

Prove that it is impossible to tile an 8 × 8 checkerboard with 1 × 3 tiles
*Sunday, February 8, 2015 at 1:12pm*

**math **

kellys dog eats 1 2/3 bones in 10 days. How many bones will he eat in 18 days?
*Sunday, February 8, 2015 at 1:11pm*

**math**

Two angles of a quadrilateral measure 130° and 20°. The other two angles are in a ratio of 5:16. What are the measures of those two angles?
*Sunday, February 8, 2015 at 1:07pm*

**math**

Among the integers from 1 to 10, 000, 000, 000 which are there more of: Those in which the digit 1 occurs or those in which it does not occur?
*Sunday, February 8, 2015 at 1:01pm*

**Math**

On January 31, a count of ending inventory was completed, and 7,200 units were on hand. Using the periodic inventory system, calculate the cost of goods sold and ending inventory using LIFO, FIFO, and weighted-average inventory methods.
*Sunday, February 8, 2015 at 12:30pm*

**Math**

Yalda has six $5 notes, ten $10 notes and four $20 notes in her purse. If she takes out one note, what is the probability that it will be: A) a $20 note B) a $5 or $10 note C) a $50 note D) she buys a new toaster with a $20 note and a $10 note. If she now took out a note, what...
*Sunday, February 8, 2015 at 12:09pm*

**6th grades math**

Alyssa's shelves hold 31 books each. How many shelves will Alyssa need if Alyssa has 248 books?
*Sunday, February 8, 2015 at 10:29am*

**math**

simplify: ____1____ _____1______ ¡Ì2 ¡Ì3 ¡Ì2 ¡Ì4 ¡Ì3
*Sunday, February 8, 2015 at 8:41am*

**math**

Show how to write and evaluate an expression to represent and solve this problem: Jeff and his friend each text four classmates about a concert. Each classmate then texts four students from another school about the concert. If no one receives the message more than once, how ...
*Sunday, February 8, 2015 at 2:57am*

**math:order of operation**

TWO PART Ellen is playing a video game in which she captures butterflies. There are 3 butterflies onscreen, but the number of butterflies doubles every minute. After 4 minutes, she was able to capture 7 of the butterflies. A)LOOK FOR A PATTERN. Write an expression for the ...
*Sunday, February 8, 2015 at 2:53am*

**math**

I'm trying to work on this practice question But got confuse on this question: find the value of P = Q ( 1 - 1.03^-20 / 0.03) where Q is 1000 to the nearest whole number? Thank you =)
*Sunday, February 8, 2015 at 2:34am*

**math**

compare 2 fractions with different numerators and denominators
*Sunday, February 8, 2015 at 12:22am*

**Math **

If x+2y=4 and xy=-8, what is the value of x^2+4y^2. I have been thinking about this and can't make heads or tails of it.
*Sunday, February 8, 2015 at 12:13am*

**Math**

If the graph is decreasing from left to right, which of the following equations may be represented by it. 1. y = 2^x + 1 2. y = -2^-x + 1 3. y = 2^-x – 1 4. y = 2^-x + 1
*Saturday, February 7, 2015 at 10:29pm*

**math**

The a hollow cylinder. The internal and external radii are estimated to be 6 cm and 8 cm respectively, to the nearest whole number. The height of the cylinder is exactly 14 cm. (a) Determine the exactly values for internal and external radii which give maximum volume of the ...
*Saturday, February 7, 2015 at 9:52pm*

**math**

There are two sign posts A and B on the edge of the road. A is 400 m to the west of b. A tree is on a bearing of 60 degree from A and a bearing of 330 degree from B Calculate the shortest distance of the tree from the edge of the road.
*Saturday, February 7, 2015 at 9:48pm*

**Math**

Simplify [(4x^2)^-1 / (-2x^-2)^-3]^-2
*Saturday, February 7, 2015 at 6:41pm*

**Math**

1.Quadrilateral GHJK has vertices at the following coordinates: G(-2,-6), H(-8,-8), J(-6,-2), and K(0,0), what would be the new vertices if the quadrilateral was dilated by the scale factor of 1.5? G':_________ H':_________ J':_________ K':_________ Could ...
*Saturday, February 7, 2015 at 6:05pm*

**math**

use an array to explain how you can solve 15 x 6 using facts that you already know
*Saturday, February 7, 2015 at 5:36pm*

**math**

2 and 4/15 minus 10/15 equals
*Saturday, February 7, 2015 at 5:26pm*

**math**

2 4/15 minus 10/15 equals
*Saturday, February 7, 2015 at 5:16pm*

**math**

How many times as great as 15^9 is 15^10 ?
*Saturday, February 7, 2015 at 4:22pm*

**Math**

How would you solve this problem? cos x/1+sinx
*Saturday, February 7, 2015 at 3:23pm*

**math**

In a game, you draw a card with three consecutive numbers on it. You can choose one of the numbers and find the sum of its prime factors. Then you can move that many spaces on a game board. You draw a card with the numbers 25, 26, 27. Which number should you choose if you want...
*Saturday, February 7, 2015 at 3:11pm*

**Math**

The company needs at least $300,000 fire and theft insurance and at least $4,200,000 and liability for the from these plans. How many units should be purchased from H plan to minimize the cost of the premiums? What is the minimum premium?
*Saturday, February 7, 2015 at 2:57pm*

**Math Help**

Hi! I need help with this practice problem. My teacher gave us the answer, "2cot u" BUT she wants us to figure out why that's the correct answer. I'm having some trouble with this and could really use some help. Thank you! Problem: 1+ sec u/tan u - tan u/1+...
*Saturday, February 7, 2015 at 2:17pm*

**Math**

If sin x = -12/13 and tan x is positive, find the values of cos x and tan x.
*Saturday, February 7, 2015 at 1:50pm*

**Math**

Which of these are NOT a trigonometric identity? A.) 1-cos^2x=sin^2x B.) sin^2x+1=cos^2x C.) 1+cot^2x=csc^2x D.) sec^2x-1=tan^2x
*Saturday, February 7, 2015 at 1:39pm*

**^Math.^ Pls,I need help**

I was aked to prove that (a - b)^2 = (a + b)^2 - 4ab
*Saturday, February 7, 2015 at 1:32pm*

**Aztec high school**

Math/ terry has a board that is 4 yards long. How much needs to be saw off to make the board 2 feet 8 inchs long?
*Saturday, February 7, 2015 at 1:27pm*

**Vectors and Math**

The textbook answer is -80 Question: find (3a+4b)(2b+4a) if a= -i-3j+k and b=2i+4j-5k What I did: =6(a)(b) - 12|a|^2 + 2|b|^2 - 4(a)(b) =2(a)(b)-12|a|^2+2|b|^2 substitute a and b with given equations. Added like terms for each part.(too long to write out) and I got -20-6+38+4-...
*Saturday, February 7, 2015 at 1:16pm*

**math**

You need to give 6mg of a drug, The drug on hand has a concentration of 24mg per ounce. How many teaspoons will you give?
*Saturday, February 7, 2015 at 12:25pm*

**math**

A number from 49 to 58, inclusive, is drawn at random. P (an even number).
*Saturday, February 7, 2015 at 11:42am*

**math**

Alice wants to find all the price factors of the number you get when you multiply 17x11x13x7. She thinks she has to use a calculator to perform all the multiplications and then find the prime factorization of the resulting number. Do you agree? Why or why not? THX
*Saturday, February 7, 2015 at 9:32am*

**Consumer Math**

The Brush Company issued 4,000 shares of common stock worth $200,000.00 total. What is the par value of each share?
*Saturday, February 7, 2015 at 8:31am*

**math**

A coin is tossed 3 times. Find the probability that all the 3 are heads (A) if it is known that the first is heads (B) if it is known that the first 2 are heads (C) if it is known that the 2 of them are heads
*Saturday, February 7, 2015 at 6:13am*

**Math**

lim x→−12 sqrt(x^2 +25 −13)/x+12
*Saturday, February 7, 2015 at 1:40am*

**math**

A cylinder of radius 14 cm contains water. A metal solid cone of base radius 7 cm and height 18cm is submerged into the water. Find the change in height of the water level in the cylinder
*Saturday, February 7, 2015 at 1:18am*

**math**

There are two sign posts A and B on the edge of the road. A is 400 m to the west of b. A tree is on a bearing of 60 degree from A and a bearing of 330 degree from B Calculate the shortest distance of the tree from the edge of the road.
*Saturday, February 7, 2015 at 1:18am*

**math**

The a hollow cylinder. The internal and external radii are estimated to be 6 cm and 8 cm respectively, to the nearest whole number. The height of the cylinder is exactly 14 cm. (a) Determine the exactly values for internal and external radii which give maximum volume of the ...
*Saturday, February 7, 2015 at 1:04am*

**MATH**

If I put $300 in an account that earns 5.5%, how much will there be in the account at the end of 21 years?
*Saturday, February 7, 2015 at 12:58am*

**math**

how many times as great as 15^9 is 15^10?
*Saturday, February 7, 2015 at 12:46am*

**math**

Explain why it is possible to draw more than two different rectangles with an area of 36 square units, but it is not possible to draw more than two different rectangles with an area of 15 square units. The sides of the rectangles are whole numbers. EXPLAIN your answer. THX
*Saturday, February 7, 2015 at 12:29am*

**math**

An artist makes three types of ceramic statues (large, medium, and small) at a monthly cost of $820 for 180 statues. The manufacturing costs for the three types are $6, $5, and $4. If the statues sell for $22, $14, and $11, respectively, how many of each type should be made to...
*Saturday, February 7, 2015 at 12:27am*

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