Friday

October 31, 2014

October 31, 2014

**Branches of Math**

**Recent Math Questions**

Post a New Question | Current Questions

**Advanced math**

use integration to find the volume of a pyramid with heighs and square base witht of 6 unit and square base with sides of 4 units
*Thursday, October 16, 2014 at 1:47am*

**7th grade math**

Not sure how to solve this: Suppose your school is selling magazine subscriptions. Each subscription cost $20. the company pays the school half of the total sales in dollars. The school must also pay a one-time fee of $18. What is the fewest number of subscriptions that can be...
*Thursday, October 16, 2014 at 12:15am*

**Math**

Which of these two form a geometric sequence? 1. 2x, 4x - 2, 6x - 4 ..... 2. x + 1, 2x + 2, 5x + 1 .....
*Wednesday, October 15, 2014 at 11:56pm*

**4th grade math **

mrs jacksin bought 6 gallons of juice for a party. each gallon has 16 cups. if 3 cups of juice were left over, how many cups did people drink at the party? Please help
*Wednesday, October 15, 2014 at 11:28pm*

**math **

Simplify 3√45x-√27x+17√3x-9W30;125x^3
*Wednesday, October 15, 2014 at 11:25pm*

**Analytical Chem**

The following electrochemical cell can be used to calculate the formation constant Kf for a metal and EDTA. The cell has a voltage of -0.262V. The right half cell contains a metal (M^2+) with a standard reduction potential of -0.236V. Calculate the Kf for the metal EDTA ...
*Wednesday, October 15, 2014 at 11:15pm*

**math**

A pair of blocks of the mass M =30.7 kg, and 2 M are dragged over a rough, horizontal surface by two constant forces of magnitude F=98.0 N. The angle α = 22.7 ° . The blocks are displaced 7.5 m, and the coefficient of kinetic friction is 0.258. *for the normal force ...
*Wednesday, October 15, 2014 at 10:56pm*

**Math**

a car is 48 times bigger than a model that you are building if the tires are 27 inches tall how tall will the tires on the model be
*Wednesday, October 15, 2014 at 10:54pm*

**Math**

Estimate then record the product $53 times 4
*Wednesday, October 15, 2014 at 10:32pm*

**math**

The number 199,557 contains two sets of digits in which one digit is ten times as great as the other. What are the values of the digits in each set?
*Wednesday, October 15, 2014 at 10:23pm*

**math**

Data were recorded for the demand and revenue of a given product. Find the linear regression line which represents the revenue function. Find the quadratic regression curve which represents the revenue function. Data Demand x Revenue y 1 0 100 2 4 139.2 3 8 176.8 4 12 212.8 5 ...
*Wednesday, October 15, 2014 at 9:55pm*

**Math**

True or false: as then number in the sample becomes larger and larger (assuming it means as the sample gets larger and larger), then the mean of the sampling distribution is equal to the population distribution for any normal population. Is it false? That it would be ...
*Wednesday, October 15, 2014 at 9:53pm*

**math**

A board is two thirds yard long cut into six equal pieces how long is each piece
*Wednesday, October 15, 2014 at 8:58pm*

**Math**

Is there another way to write this equation? y=35.15e^1.04x
*Wednesday, October 15, 2014 at 8:52pm*

**Math**

the amount of simple interest earned in a savings account varies directly with the amount of money in the savings account with the amount of money in the account. A certain bank offers a 2% savings rate write a direct variation equation for the amount of interest, y earned on ...
*Wednesday, October 15, 2014 at 8:39pm*

**Math**

A plane takes off from a local airport. It travels due north at a speed of 400km/h. The wind blows the plane due east at a speed of 50 km/h. How far is the plane from the airport after 1h. Give your answer to one decimal place
*Wednesday, October 15, 2014 at 8:38pm*

**math**

Martha is covering kitchen shelves with shelving paper. She has 6 shelves that are each 1 ¾ feet long. She buys 13 ¼ feet of shelving paper of the correct width. Which equation can be used to determine how much paper she will have left over? would that equation ...
*Wednesday, October 15, 2014 at 8:33pm*

**Math**

y=4x-10
*Wednesday, October 15, 2014 at 8:32pm*

**Math 112**

On your first two exams, your grades are 86% and 88% x=86 and y=88 What must you get on the third exam to have an average of 90%?
*Wednesday, October 15, 2014 at 8:31pm*

**Math check**

Add and simplify 9 ft 6in 8ft 8in 8ft 5in 7ft 11in 6ft 7 in _______ 38ft 37in
*Wednesday, October 15, 2014 at 8:27pm*

**Quick math help**

I'm on the topic of "Algebra proofs". Is this statement an example of a transitive property?: If CD=AB and AB=8 then CD=8 Here's another problem I want you to check& note that I only have 4 blanks per side of the table (statements and reasons) Given: 2(x+3)=...
*Wednesday, October 15, 2014 at 8:23pm*

**math**

Write three decimals that are equivalent
*Wednesday, October 15, 2014 at 8:22pm*

**math**

What is AB x BC?
*Wednesday, October 15, 2014 at 8:15pm*

**math**

Marcus Has 5 sticks, He gave away 0.75 of each stick away. How Many Did He He Give Away
*Wednesday, October 15, 2014 at 8:11pm*

**Math**

Please check 2/5 + (-7/8) = -6
*Wednesday, October 15, 2014 at 8:09pm*

**Math **

Please check 15/16 x 2/3 = 5/8
*Wednesday, October 15, 2014 at 7:59pm*

**Math**

3/4 of a puzzle in 7/8 hours What's the unit rate?
*Wednesday, October 15, 2014 at 7:57pm*

**Math**

What's 4.32(3.7 + 1.65) I have 5.35 so far. And I'm just making sure what the answer is for 4.32 x 5.35
*Wednesday, October 15, 2014 at 7:24pm*

**Math**

Does anyone know an easy way to remember the leading coefficient test for end behavior? I cannot seem to remember how to determine the direction the graph should go on these problems.
*Wednesday, October 15, 2014 at 7:24pm*

**math **

solve this equation a divided into 7=20 the actual problem has the divide sign. I got a=20*7 so a=140
*Wednesday, October 15, 2014 at 7:18pm*

**Math**

5.235 - 0.88
*Wednesday, October 15, 2014 at 7:11pm*

**Math**

(-3) ^-4 5 ^-2 =?
*Wednesday, October 15, 2014 at 6:44pm*

**Math--1 question **

Name the inverse operations for each of the following operations. a. addition b. division c. multiplication d. subtraction
*Wednesday, October 15, 2014 at 6:22pm*

**Math**

For middle school pizzaz worksheet number 66, moving words.What's the answer? I need the answer, like, ASAP.
*Wednesday, October 15, 2014 at 6:15pm*

**Math**

write each decimal as a percent: 1.07 35 0.003 0.0077 what do i do to convert the decimal into a percent??
*Wednesday, October 15, 2014 at 6:08pm*

**8th grade Math help**

PLEASE HELP!!! Anita hikes 7 miles due east and then 3 miles due north. Rounded to the nearest mile, what is the shortest distance from the starting point to the ending point? A. 4 B. 6 C. 8 D. 10 I think it's B. am i right?
*Wednesday, October 15, 2014 at 5:49pm*

**Math**

A basketball team won 70% of the 30 games they played. How many games did they win?
*Wednesday, October 15, 2014 at 5:34pm*

**math**

Find three consecutive positive even integers such that four times the first decreased by the second is 12 more than twice the third.
*Wednesday, October 15, 2014 at 4:54pm*

**math**

To find the sum of 286+134 would you regroup once or twice explain
*Wednesday, October 15, 2014 at 4:52pm*

**Math**

Solve 4cos^2A = 3cosA for 90º≤A≤180º. (Enter only the number.) Find A when 0º≤A≤90º and 3tan^2A = 2tanA + 1. (Enter only the number.)
*Wednesday, October 15, 2014 at 4:51pm*

**Math**

32x+36y+16=0 36x+32y+16=0 Find x and y
*Wednesday, October 15, 2014 at 4:50pm*

**Math **

What are the steps to show the quotient in simplest form? Be sure to include various key words. 0.000027 divided by 0.000009 My answer 0.000027 divided by 0.000009=3 Definition of a quotient The answer after you divide one number by another. The qutient in this problem is 3. ...
*Wednesday, October 15, 2014 at 4:14pm*

**Math**

1) What is the probability of winning the jackpot if you play the Florida Lotto? 2) What is the probability of winning the jackpot if you play Mega Millions? 3) What is the probability of winning the jackpot if you play Powerball? Tall versus Short All tall 787 tall 277 short...
*Wednesday, October 15, 2014 at 4:05pm*

**Math**

Which of the following appears to be an irrational number? A. 0.404404440... B. 0.783783783... C. -4/15 D. 6 Is the answer A?
*Wednesday, October 15, 2014 at 4:02pm*

**Math**

A certain computer can perform 10^5 calculations per second. How many calculations can it perform ins 10 seconds? My answer: 10^5=100,000 Multiply by 10=10^6=1,000,000 Am I correct? Thank you
*Wednesday, October 15, 2014 at 3:37pm*

**math**

in a triangle the sum of the angle is 180degrees. if angle A is three times angle B and Angle C is 10 degrees more than twice Angle A. Find the measures of the three anges to the newarest degree
*Wednesday, October 15, 2014 at 3:30pm*

**Math **

Leah is making chocolate chip cookies and the recipe calls for 3/4 cup of chocolate chips. If she wants to make 2/3 of the recipe what fraction of the chips will she need?
*Wednesday, October 15, 2014 at 3:19pm*

**Math**

Two pilots take off from the same airport. Mason heads due south. Nancy heads 23º west of south. After 400 land miles, how far is Nancy from Mason’s route? Round your answer to the nearest tenth of a mile. (Enter only the number.)
*Wednesday, October 15, 2014 at 3:08pm*

**Math**

Which of the following appears to be an irrational number? A. 0.404404440... B. 0.783783783... C. -4/15 D. 6 Is the answer A?
*Wednesday, October 15, 2014 at 3:06pm*

**Math**

Express 0.72 as a fraction in simplest form. A. 72/100 B. 100/72 C. 36/50 D. 18/25 Is the answer D?
*Wednesday, October 15, 2014 at 2:52pm*

**Math (Ms. Sue! Someone help)**

Hi I really need help. I don't know even how to figure these two questions out so if you could help me, please. Is (–4, 10) a solution to the equation 10 – 5x = y? Explain your answer. Describe the pattern in the table using an equation. x|y 1|15 2|25 3|35 4|45 ...
*Wednesday, October 15, 2014 at 2:25pm*

**math**

There are two simultaneous games. One game is flipping a coin. Payment of tail is $2.50 and head is $1.50. And the other game is rolling a six sided die and paying number of dollars shown on the face of the die. Both the coin and the die are determined simultaneously and are ...
*Wednesday, October 15, 2014 at 1:22pm*

**Math**

Let sin A = 12/13 with 90º≤A≤180º and tan B = -4/3 with 270º≤B≤360º. Find tan (A + B).
*Wednesday, October 15, 2014 at 1:08pm*

**math**

If 25 kids like chocolate cake and 25 other kids like strawberry cake how many kids like either?
*Wednesday, October 15, 2014 at 1:04pm*

**Stat, Math**

The image of the public library is constantly changing, and their online services continue to grow. Usage of the library's home page grew by 17% during the past 12 months. It has been estimated that the current average length of a visit to the library's homepage is ...
*Wednesday, October 15, 2014 at 12:01pm*

**math**

The cost of 4 dozens penceles, 3 dozens pens and 2 dozens eraser is Rs.16. The cost of 2 dozens penceles, 4 dozens pens and 6 dozens erase is Rs.90 wheras the cost of 6 dozens pencils, 2 dozone pens and 3 dozens eraser is Rs.70 find the cost of each itomes per dozens by matrices
*Wednesday, October 15, 2014 at 10:25am*

**math**

Manuel painted 4 houses over the summer. John painted x houses. Patrick painted 2 houses. They painted 9 houses in all. How many houses did John paint? Not sure if it's x-(4+2)=9 or is it x+(4+2)=9
*Wednesday, October 15, 2014 at 8:55am*

**math**

The 17th hole at the famous St Andrews golf course is 420m in length. how long will it appear on a plan of course of scale 1:8000?
*Wednesday, October 15, 2014 at 8:54am*

**math**

Max has 5 more than twice as many cookies as Chris. Write an expression that shows the number of cookies Max has if Chris has c cookies. 5+2x=c Not sure please help.
*Wednesday, October 15, 2014 at 8:34am*

**math**

How long will it take a car 3m long travelling at 100km/h to overtake a truck 10m long travelling at 50km/h, if the car is 10m behind the truck
*Wednesday, October 15, 2014 at 2:52am*

**Math**

Which number will have the same result, when rounded to the nearest ten or hundred? Is it 97, 118 and 5, 179 or 5,091?
*Wednesday, October 15, 2014 at 1:08am*

**math**

What is the perimeter of a rectangle that has a area of 35 in to the square root of 2
*Wednesday, October 15, 2014 at 12:14am*

**6th grade math**

a diver's elevation is -30 feet relative to sea level. she dives down 12 feet. what is her elevation after the dive? a. 12 feet b. 18 feet c. -30 feet d. -42 feet
*Wednesday, October 15, 2014 at 12:03am*

**math college algebra**

lynne is 24 years old. lynne is twice as old as jean was when lynne is as old as jean is now. how old is jean ?
*Wednesday, October 15, 2014 at 12:00am*

**math**

If jen can paint a room in 7 hours and jen and keith can paint the room in 4 hours. how long will it take keith to paint the room alone?
*Tuesday, October 14, 2014 at 10:50pm*

**math**

Find the general form of the equation of the plane passing through the point and perpendicular to the specified vector. [Be sure to reduce the coefficients in your answer to lowest terms by dividing out any common factor.] (8, 6, 3), n = i – 6j + k
*Tuesday, October 14, 2014 at 10:13pm*

**Math Check**

Are my answers right? 1.) Find the remainder (x^3+2x^2+3x+4)/(x+2) My answer: 2 2.) Find the remainder (x-1)/(x^4-3x^2+2x-1) My answer: -1
*Tuesday, October 14, 2014 at 9:39pm*

**Math (Ms.Sue)**

Marco ran from his house 2.67 miles to a county park. He then ran the 1.5 mile cross country loop at the park and back home. How many miles did Marco run altogether? I added and got 4.17 miles Is that correct
*Tuesday, October 14, 2014 at 9:24pm*

**math**

Peter spent 2/5 of his pocket money on clothes and had #45 left.what was his pockey money
*Tuesday, October 14, 2014 at 9:23pm*

**Math**

The ratio of games the Falcons won to the games they lost for the 2013 football season was 7:5. What is the ratio of games won to the total number of games played? What kind of ratio did you describe?
*Tuesday, October 14, 2014 at 9:14pm*

**math**

sketch and label all possible rectangles with a perimeter of 30 cm and sides whose lengths are whole numbers help me tell my son what to do I don't understand
*Tuesday, October 14, 2014 at 8:25pm*

**Math**

without doing the computation, explain why or why not 19.7 is a reasonable value for the expression 122.14 divided by 6.2
*Tuesday, October 14, 2014 at 8:18pm*

**math**

semir, sarah and sung so decided to raise money for a local homeless shelter by working in a local deli. the deli agreed to donate to the shelter a portion of the profits from each meal the three sold. semir sold 3 times as many meals as sarah. sung sold 2 more meals than ...
*Tuesday, October 14, 2014 at 7:58pm*

**Math**

Mrs. Daniel pays $324 for a handbag and 3 pairs of shoes. The handbag cost half as much as the 3 pairs of shoes combined. Find the cost of the hand bag.
*Tuesday, October 14, 2014 at 7:56pm*

**Math**

Can you think of situations in which it might be preferable to compute with decimals rather than fractions or to compute with fractions rather than decimals, give examples of each situation and tell why you think that number form is preferable
*Tuesday, October 14, 2014 at 7:55pm*

**Math**

If each of the 3,121 members in a community drank 267 glasses of water in a year, about how many glasses of water would be consumed by that community in a year? Estimate by rounding each term to the greatest place.
*Tuesday, October 14, 2014 at 7:55pm*

**Math**

If each of the 3,121 members in a community drank 267 glasses of water in a year, about how many glasses of water would be consumed by that community in a year? Estimate by rounding each term to the greatest place.
*Tuesday, October 14, 2014 at 7:55pm*

**Math**

Gary is 61 1/8 inches tall. his friends Gino and Gilbert are 56 1/2 inches tall and 63 1/8 inches tall, what is the average heigh of the three friends
*Tuesday, October 14, 2014 at 7:30pm*

**Math**

There are four brown shoes and 10 black shoes on the floor. your puppy cares away two shoes and puts one shoe in the trashcan and one in the laundry basket. a. What is the probability that there will be a black shoe in the trash and a brown shoe in the laundry basket?
*Tuesday, October 14, 2014 at 7:30pm*

**math**

how do i work this problem 8x25x23 using subtraction in mental math
*Tuesday, October 14, 2014 at 7:20pm*

**math**

the height of a ball thrown vertically upward from a rooftop is modelled by h(t)=-5t^2 +20t+50. Determine the maximum height of the ball.
*Tuesday, October 14, 2014 at 7:04pm*

**math**

These problems I really don't understand and really need serious help :) 1.What the product of (5.1 x 10^3)x (3.2 x 10^3)?(Please express your answer in scientific notation) 16.32 x 10^6 .... 1.632 x 10^7 16.32 x 10^9 1.632 x 10^10 2.What is the product of (7.28 x 10^-2)x(...
*Tuesday, October 14, 2014 at 6:54pm*

**math**

These problems I really don't understand and really need serious help :) 1.What the product of (5.1 x 10^3)x (3.2 x 10^3)?(Please express your answer in scientific notation) 16.32 x 10^6 1.632 x 10^7 16.32 x 10^9 1.632 x 10^10 2.What is the product of (7.28 x 10^-2)x(9.1 x...
*Tuesday, October 14, 2014 at 6:44pm*

**math**

in recent year, the world production of wheat was about 5.2 *10^8 metric tons. Canada produced 1/25 of this wheat. about how much wheat did Canada produce?
*Tuesday, October 14, 2014 at 6:34pm*

**math **

what is the quotient (2.965 x 10 ^7) divided by (5 x 10^3)?
*Tuesday, October 14, 2014 at 6:32pm*

**math**

alyssa has saved 26 quarters from washing cars. how many cents does alyssa have?
*Tuesday, October 14, 2014 at 6:08pm*

**Math**

How to solve 2^-1/5^2 ?
*Tuesday, October 14, 2014 at 5:53pm*

**math**

suppose 8 out of every 20 students are absent from school less than 5 days a year. Predict how many students would be absent from school less than 5 days a year out of 40,000 students.
*Tuesday, October 14, 2014 at 5:15pm*

**math**

5 less than three times the number of chipmunks. We got 3x-5 but weren't sure.
*Tuesday, October 14, 2014 at 5:10pm*

**science/math**

you have the same volume of two different liquids. what are two ways you can tell which has greater density? Answer: by comparing its Weight and mass
*Tuesday, October 14, 2014 at 4:46pm*

**Math**

Is this ratio in simplest form 14:12?
*Tuesday, October 14, 2014 at 4:22pm*

**Math**

The ratio of games the Falcons won to the games they lost for the 2013 football season was 7:5. What is the ratio of games won to the total number of games played? What kind of ratio did you describe?
*Tuesday, October 14, 2014 at 4:08pm*

**math**

1/2(x-2)<3/4(1-3x)<-2
*Tuesday, October 14, 2014 at 3:39pm*

**math**

1/2(x-2)<3/4(1-3x)<-2
*Tuesday, October 14, 2014 at 3:37pm*

**math**

1/2(x-2)<3/4(1-3x)<-2
*Tuesday, October 14, 2014 at 3:37pm*

**math**

Jane is organizing her 24 dolls into equal sized piles. What is the possible number of dolls that could be in each pile?
*Tuesday, October 14, 2014 at 2:59pm*

**Math**

Suppose sinA = 12/13 with 90º≤A≤180º. Suppose also that sinB = -7/25 with -90º≤B≤0º. Find cos(A - B).
*Tuesday, October 14, 2014 at 2:39pm*

**Math**

Suppose sinA = 12/13 with 90º≤A≤180º. Suppose also that sinB = -7/25 with -90º≤B≤0º. Find cos(A + B).
*Tuesday, October 14, 2014 at 2:21pm*

**Physical Science- Math skills**

Rachel is asked to calculate the density of a liquid. She correctly measures the mass of the liquid to be 14 grams, but she incorrectly measures the volume of the liquid to be 10 mL. The actual volume of the liquid is 9 mL. If Rachel uses the following equation to calculate ...
*Tuesday, October 14, 2014 at 2:18pm*

**Math**

Select all the true statements about identities. A) You may use proven identities to prove other identities. B) An identity is true only for restricted values of the variables. C) You can prove an identity by graphing the side to the left of the equal sign, graphing the side ...
*Tuesday, October 14, 2014 at 2:18pm*

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