Thursday

November 27, 2014

November 27, 2014

**Branches of Math**

**Recent Math Questions**

Post a New Question | Current Questions

**math**

Select the appropriate values of x that are solutions to f (x)=0, where f ( x ) =-7x^2+4x+9
*Tuesday, October 21, 2014 at 2:49am*

**Math**

Suppose that water is pouring into a swimming pool in the shape of a right circular cylinder at a constant rate of 3 cubic feet per minute. If the pool has radius 6 feet and height 10 feet, what is the rate of change of the height of the water in the pool when the depth of the...
*Tuesday, October 21, 2014 at 12:44am*

**Math HELP!!!!!**

3/8x11 3/5x5/7 3/4x2 2/5x5/6 7/8x1/2
*Tuesday, October 21, 2014 at 12:34am*

**math**

Identify the solution(s) of the system of equations, if any. x + 2y = 7 3x - 6y = 3 (4, ) (4, ) (, 4) (, 4)
*Tuesday, October 21, 2014 at 12:04am*

**Math**

Which algebretic equation correct represents this sentence? 25 is three times a number decreased by 8. A. 25 = 3w - 8 ? B. 3 = 25w - 8 ? C. 3 = 25w + 8 ? D. 25 =3(w + 8) ? a little confused lol.. help? Thanks Everyone So Much
*Monday, October 20, 2014 at 11:23pm*

**math**

HELP HELP PLEASE The University of Townville gives a full scholarship to any student who scores in the top 4% of students on the SMRT standardized exam. SMRT scores have a mean of 260 and a standard deviation of 22. What score does a student need to attain in order to receive ...
*Monday, October 20, 2014 at 11:18pm*

**math**

Jordan is making a beaded necklace, 2/3 of the beads she uses are red and 4/21 of the beads are blue, she wants the rest to be white, what fraction of the beads should be white?
*Monday, October 20, 2014 at 10:40pm*

**Math**

A skier has decided that on each trip down a slope, she will do 2 more jumps than before. On her first trip she did 6 jumps. Derive the sigma notation that shows how many total jumps she attempts from her fourth trip down the hill through her twelfth trip. Then solve for how ...
*Monday, October 20, 2014 at 10:15pm*

**6TH GRADE MATH **

Use an example to describe the multiplicative relationship between two equivalent ratios. Can someone please help me?
*Monday, October 20, 2014 at 10:11pm*

**Math 11**

A roller coaster has a track that drops at an angle of depression of 25 degrees from a height of 14.9 m. When it reaches the ground in travels horizontally for 8 m. It then rises at an angle of elevation of 47 degrees to a height of 26.8 m A) What is the total horizontal ...
*Monday, October 20, 2014 at 10:06pm*

**Math 11**

An airplane is flying 100 km north and 185 km west of an airport. it is flying at a height of 7 km. A) what is the straight-line distace to the airport? B) what is the angle of elevation of the airplane, from the point of view of the airport?
*Monday, October 20, 2014 at 10:02pm*

**math 11**

An asymmetrical roof has measurements show in the diagram below. if the vertical supports are each two feet apart, calculate the measure of angle G and the slant heights (lengths x and y) of the roof.
*Monday, October 20, 2014 at 9:59pm*

**Math 11**

Chung-ho is standing on the top of a building that is 135 m talk. The angle of depression to the top of the building next door is 71 degrees. The angle of depression to the basebof the building is 77 degrees. The building are 31 m apart. How talk is the other building?
*Monday, October 20, 2014 at 9:50pm*

**Math HELP!!!!!**

give 2 examples of mixed numbers that when multiplied by 3/4 give a product between 3/4 and 1 PLEASE HELP ME AND QUICK I HAVE A LOT DUE TOMORROW!!!!!
*Monday, October 20, 2014 at 9:40pm*

**math**

the product of my digits is an even number the sum of my digits is < 100
*Monday, October 20, 2014 at 9:36pm*

**math**

if 1/2 times 3/4 is 3/8 why is it less than 3/4?
*Monday, October 20, 2014 at 9:31pm*

**math**

An estimate for √123 is. A.10 B.11 C.12 D.13 Is the answer B?
*Monday, October 20, 2014 at 9:02pm*

**math**

An estimate for -√66 is A.-6 B.-7 C.-8 D.-9 Is the answer D?
*Monday, October 20, 2014 at 8:53pm*

**math ratios**

use an example to describe the multiplicative relationship between two equivalent ratios.
*Monday, October 20, 2014 at 8:40pm*

**math**

An estimate for √3 is. A.1 B.1.2 C.1.7 D.2 Is the answer C.
*Monday, October 20, 2014 at 8:40pm*

**Math HELP!**

An estimate for -square root 66 is (blank) A. -6 B. -7 C. -8 D. -9 Is the answer C? Thank You
*Monday, October 20, 2014 at 8:38pm*

**math**

195 divided by 4 estimated
*Monday, October 20, 2014 at 8:37pm*

**math**

Estimate the value of √45 to the nearest integer. A.-7 B.6 C.-6 D.7 Is the answer D?
*Monday, October 20, 2014 at 8:36pm*

**Math**

Eight-ninths of a bunch of marbles remain on a table. The square root of half the total number of marbles have rolled away. Also, the two children who are playing with the marbles each hold one marble. Find the total number of marbles in the bunch.
*Monday, October 20, 2014 at 8:25pm*

**math**

A MAP HAS A SCALE OF 5 INCHES:11 MILES.IF TWO CITIES ARE 45 INCHES APART ON THE MAP,WHAT IS THE ACTUAL DISTANCE BETWEEN THE CITIES?
*Monday, October 20, 2014 at 8:18pm*

**math**

find the unit rate 45mi/h=____ft/sec
*Monday, October 20, 2014 at 8:04pm*

**Math HELP!**

Which two square roots are used to estimate square root 5? A. Square root 1 and square root 2. B. Square root 2 and square root 4. C. Square root 4 and square root 9. D. Square root 9 and square root 16. Is the answer B? Thanks
*Monday, October 20, 2014 at 7:57pm*

**math**

Ms.Franco has many pens.1/3 of her pens are blue.1/2 of her pens are black and the rest are all other colors.There were 5 more black pens than blue pens.How many pens were not black or blue?
*Monday, October 20, 2014 at 7:40pm*

**math**

The ratio of students Ms.Finn has to Mr.D is 7:4.Ms.finn has 15 more students than Mr.D.After sending some students to Mr.D,Ms.finn will have 5/6 as many students as Mr.Finn. a)How many students did Ms.Finn have in the beginning? b)How many students did Ms.Finn send to Mr.D?
*Monday, October 20, 2014 at 7:37pm*

**math**

Heather has $500 in her savings account. She withdraws $20 per week for gas. Write the equation heather can use to find out how many weeks it will take her to have a balance of $220
*Monday, October 20, 2014 at 7:29pm*

**Math**

Ms. Compra bought 5 markers for $4.75. At this price how much will 4 markers cost? I got .95 each. Is that correct?
*Monday, October 20, 2014 at 6:50pm*

**Math**

In a group of 22 boys, 13 play basketball and 15 play football. 3 of the boys play neither. how many play both ?
*Monday, October 20, 2014 at 6:41pm*

**math**

sam makes $400 per week plus $20 commission on each new cell phone plan she sells. Write an equation to determine how many plans she sold to earn $680 last week.
*Monday, October 20, 2014 at 6:39pm*

**Math**

At Bob's binders, a set of 3 notebooks costs $4.20. At Pam's Paper Place a set of 4 notebooks costs $5.20. What is the unit price of the notebooks at each store? Which is the better buy?
*Monday, October 20, 2014 at 6:30pm*

**math**

A hotel has rooms numbered 1 to 1000. One thousand visitors enter the hotel. 1. The first visitor switches on the light switches of every room. 2. The second visitor switches off the light switches of every other room, starting with room 2. 3. The third visitor toggles the ...
*Monday, October 20, 2014 at 6:21pm*

**math**

Bria and her friends are 3/4 of the pizza. Her sister ate 2/3 of what was left. how much did her sister eat?
*Monday, October 20, 2014 at 6:01pm*

**Math**

How to figure interst of 2.9 percent for 9 months to end up with 3262.50.
*Monday, October 20, 2014 at 5:31pm*

**Math**

You have 10 yards of fabric. One pillow case requires 1 1/4 yards of fabric. How many pillow cases can you make?
*Monday, October 20, 2014 at 5:06pm*

**math**

what is the expanded form for 408,032,009
*Monday, October 20, 2014 at 4:55pm*

**Math**

Javier scored 30 goals in 15 soccer games. Using the unit rate, how many goals will he score in 20 games?
*Monday, October 20, 2014 at 4:42pm*

**Math**

There are 36 members of a sculpture class. 12 of the class members are men. What is the ratio of women to men in the class? Be sure to write your ratio in simplest form.
*Monday, October 20, 2014 at 4:40pm*

**Math**

If z^2 = x^2 + y^2 with z>0, dx/dt=3, and dy/dt=6, find dz/dt when x=4 and y=3. Answer: \displaystyle \frac{dz}{dt} =
*Monday, October 20, 2014 at 4:19pm*

**Math**

Mandy got 22 questions correct on her test. Her grade was 80%. How many questions were on the test.
*Monday, October 20, 2014 at 3:53pm*

**math**

Find the critical numbers for f=5+10x-x^{2} in the interval [-3,3].Also find the minimum and maximum.
*Monday, October 20, 2014 at 3:24pm*

**math**

As a part of a unit on weather students recorded the outroor temperature at 8:30 AM what was the difference between the weeks highest and lowest morning temperatures
*Monday, October 20, 2014 at 3:10pm*

**math**

E-Z Stop Fast Gas sold $10,957 worth of gasoline yesterday. Regular sold for $2.30 a gallon, and premium sold for $2.55 a gallon. If the station sold 420 more gallons of regular than of premium: a. How many gallons of each type of gasoline were sold? Do not enter units in your...
*Monday, October 20, 2014 at 2:29pm*

**Math **

Find cos2A when cosA = -3/5 and π/2<A<π. A) -24/25 B) -7/25 C) 7/24 D) 24/7
*Monday, October 20, 2014 at 11:08am*

**Math**

18) Find all numbers c that satisfy the conclusion of the Mean Value Theorem for the following function and interval. Enter the values in increasing order. f(x)=2x6x+12,[1,4]
*Monday, October 20, 2014 at 11:01am*

**Math**

17) Consider the function f(x)=3x3−3x2+4x+2 Find the average slope of this function on the interval (−3,5). By the Mean Value Theorem, we know there exists a c in the open interval (−3,5) such that f′(c) is equal to this mean slope. Find the two values ...
*Monday, October 20, 2014 at 11:01am*

**Math**

16) Consider the function f(x)=2x3−6x2−90x+5 on the interval [−6,7]. Find the average or mean slope of the function on this interval. By the Mean Value Theorem, we know there exists at least one c in the open interval (−6,7) such that f′(c) is ...
*Monday, October 20, 2014 at 11:00am*

**business math**

The sweet candy shop buys 600 pounds of chocolate covered strawberries at $5.59 per pound. If a 10% spoilage rate is anticipated, at what price per pound should the strawberries be sold in order achieve a 60% markup based on cost?
*Monday, October 20, 2014 at 10:56am*

**Math**

WHat dose factors mean
*Monday, October 20, 2014 at 10:32am*

**Math**

If the first dice yields an even number, what is the probability that the sum of the two dices will be equal to 12? 1st Die P(even) = 3/6 = 0.50 P(6|even) = 1/3 = 0.333 2nd Die P(6) = 1/6 = .1667 So P(12) = 0.33*0.1667 ?
*Monday, October 20, 2014 at 9:51am*

**Math**

The Basketball Birthday Batter Package at a Minor league ballpark costs $192. The Package includes tickets, drinks, and cake for A group of 16 children. Write an equation To find the cost per child. 16c = $192
*Monday, October 20, 2014 at 8:56am*

**math**

the sides of a quadrilateral are in the ratio 1:3:5:7. if the perimeter of the quadrilateral is 64cm,what is the length of the second longest side/
*Monday, October 20, 2014 at 8:19am*

**Math**

How to prove this question with using a LS=RS-style Proof? csc^2(x)cos^2(x) = csc^2(x)-1
*Monday, October 20, 2014 at 4:36am*

**math**

a cyclist bikes at a speed of 6 m/s after rolling down a hill in 3 s. Of the cyclist has a constant acceleration of 2 m/s during the descent, what was the velocity of the cyclist at the top of the hill?
*Monday, October 20, 2014 at 12:12am*

**Math**

an ice cream cone contains one spherical scoop of ice cream,the diameter of the scoop of ice cream is the same as the diameter of the cone. If the ice cream melts, will the cone overflow? Justify your answer. 4cm spherical scoop of ice cream diameter of cone- 7cm
*Sunday, October 19, 2014 at 9:38pm*

**Math**

Examine the given right angle triangle. Are the side lengths given in the diagram possible? Justify your answer. lengths: 2.4m, 9.2m, 4.7m
*Sunday, October 19, 2014 at 9:14pm*

**math**

given that theta=tan^-1(4/3) find sin theta
*Sunday, October 19, 2014 at 8:56pm*

**Math**

Find the first 3 common multiples for 6,7,8.
*Sunday, October 19, 2014 at 8:41pm*

**Math/Science**

Three bullets are fired simultaneously by three guns aimed toward the center of a circle where the bullets mash into a stationary lump. The angle between the guns is 120°. Two of the bullets have a mass of 9.30 10-3 kg and are fired with a speed of 440 m/s. The third ...
*Sunday, October 19, 2014 at 8:40pm*

**Math**

Bill is painting his basement floor. If one can of paint will cover 4.5m squared, how many cans of paint will he need? Measurements: 13.5m, 1.5m, 6m, 18m, 13.5m,1.5m show work !It is a rectangle layout!
*Sunday, October 19, 2014 at 8:40pm*

**Math**

Bill is painting his basement floor. If one can of paint will cover 4.5m squared, how many cans of paint will he need? Measurements: 13.5m, 1.5m, 6m, 18m, 13.5m,1.5m show work
*Sunday, October 19, 2014 at 8:34pm*

**Math**

All rational functions can be expressed as f(x) = p(x)/q(x), where p and q are __________ functions and q(x) ≠ 0. A. horizontal asymptotes B. polynomial C. vertical asymptotes D. slant asymptotes Is the answer D. vertical asymptotes?
*Sunday, October 19, 2014 at 8:19pm*

**math**

Find the surface area of a right rectangular pyramid with a base 10 in by 8 in and a height of 10 in. (Answer to the nearest square inch)
*Sunday, October 19, 2014 at 8:00pm*

**math**

A hairstlist schedules 1/4 hour to trim a customers hair and 1/6 hour to style. The hairstylist plans to work 3 1/3 hours each day. How many appointments can she schedule?
*Sunday, October 19, 2014 at 7:47pm*

**math**

A jade necklace is made up of 100 spherical jade beads. Each bead has a diameter of 7 mm. What is the total amount of jade, in cubic millimetres?
*Sunday, October 19, 2014 at 7:22pm*

**math**

a post is put every 6 feet along a rectangular fence that is 42 feet long and 36 feet wide. how many posts are needed?
*Sunday, October 19, 2014 at 7:16pm*

**math**

A large greenhouse is built in the shape of a right square pyramid with base lengths of 26 m, and a slant height of 35.4 m. How much glass, to the nearest square metre, is needed for the greenhouse? (Lateral area only)
*Sunday, October 19, 2014 at 6:59pm*

**Math**

The volume of a cone is 8.1 cubic yards. The cone has a height of 2.4 yd. What is the diameter of the cone to the nearest tenth of a yard?
*Sunday, October 19, 2014 at 6:37pm*

**Math**

If the first dice yields an even number, what is the probability that the sum of the two dices will be equal to 12? 1st Die P(even) = 3/6 = 0.50 P(6|even) = 1/3 = 0.333 2nd Die P(6) = 1/6 = .1667 So P(12) = 0.33*0.1667 ?
*Sunday, October 19, 2014 at 6:26pm*

**math**

At which grade level is it most appropriate for children to group by more than one attribute?
*Sunday, October 19, 2014 at 6:14pm*

**math**

Downtown Mathville is laid out as a square grid of 9 North-South streets and 9 East-West streets (See diagram). Your apartment is located at the Southwest corner of downtown Mathville. (See point T.) Your math classroom is located in a building that is 6 blocks East and five ...
*Sunday, October 19, 2014 at 5:38pm*

**Math**

Giselle has a block of wood that measures 14 cm by 12 cm by 10 cm. She is making a wooden ball in tech class. a) What percent of the wood is wasted? b) What assumptions are you making?
*Sunday, October 19, 2014 at 5:11pm*

**Math**

Speed sling takes place on a course that is 2/3 lim le long .how many feet long is the course
*Sunday, October 19, 2014 at 4:42pm*

**Math**

The centre of a doughnut is removed and formed to make a sphere of dough with diameter 2.5 cm. A batch of these spheres is to be covered in a sugar glaze. There is enough glaze to cover an area of 4710 cm^2. How many spheres can be glazed?
*Sunday, October 19, 2014 at 4:31pm*

**Math**

For f(x) = 2sinx + (sinx)^3 + tanx find f'(pi/3). Ok, so what I tried was... f'(x) = 2cosx + cosx(3(sinx)^2) + (sinx/cosx) pi/3 = (1/2, sqrt(3)/2) therefore, 2(1/2) + 1/2(3(sqrt(3)/2)(sqrt(3)/2) + (sqrt(3)/2 (2/1)) 1 + .5(3 (3/4)) + sqrt(3) 1 + .5(9/4) + sqrt(3) = 4....
*Sunday, October 19, 2014 at 4:01pm*

**math**

use your fraction strips to locate and label these numbers on a number line: 0, 3/4, and 7/8. Then use your fraction strip to measure the distance between 3/4 and 7/8.
*Sunday, October 19, 2014 at 3:22pm*

**math**

How to solve for t 2465=204.8t+4.6t^2
*Sunday, October 19, 2014 at 3:06pm*

**Math**

Samantha made 9800 mL of fruit punch for a party, and she served the fruit punch divided equally in 5 pitchers. Her guests drank 2 pitchers of fruit punch. How many liters of fruit punch did Samantha have left over?
*Sunday, October 19, 2014 at 1:05pm*

**Math**

If the length of a rectangle is increased by 10% and the width of the rectangle is decreased by 10%, is the area changed? If so, does it increase or decrease and by what percent? Explain your answer.
*Sunday, October 19, 2014 at 12:55pm*

**Math**

A glass of skim milk supplies 0.1 mg of iron and 8.2 g of protein. A quarter pound of lean red meat provides 3.75 mg of iron and 21 g of protein. If a person on a special diet is to have 7.36 mg of iron and 73 g of protein, how many glasses of skim milk and how many quarter-...
*Sunday, October 19, 2014 at 12:06pm*

**math**

if P(5 , r) = 60 then the value of r is
*Sunday, October 19, 2014 at 12:02pm*

**Math **

Find all values of p such that 2(x+4)(x-2p) has a minimum value of -18? I know x=-4 but I do not know that helps us. Please explain in steps! The temperature of a point (x,y) in the plane is given by the expression x^2-y^2-4x+2y. What is the temperature of the coldest point on...
*Sunday, October 19, 2014 at 10:10am*

**math**

Question 2 of 20 5.0 Points In the equation x = 6 - 2y, x and y are: A. directly related. B. inversely related. C. both dependent variables. D. not related. Reset Selection Mark for Review What's This? Question 3 of 20 5.0 Points John puts $780 into his checking and ...
*Sunday, October 19, 2014 at 9:54am*

**tech math**

how to solve one pulley is 7 cm larger in diameter than a second pulley. the larger pulley turns at 80 rpm, and the smaller pulley turns at 136 rpm. what is the diameter of each pulley
*Sunday, October 19, 2014 at 5:27am*

**Business Math**

Jeanna wants to buy a new boat for her family. She has two payment options. The first option is to pay a cash payment of $7,200. The second option is to finance the boat with a three year installment loan. The loan requires a 10% down payment and 36 equal monthly payments of $...
*Sunday, October 19, 2014 at 4:43am*

**Math**

1/why can 0 be divided by any number , but any number cann't be divided by 0? Answer: I don't know.. 2/ Mr. Cruz is planning to give each of his students 2 pencils for their math test . Pencils come in packs of 8 . If he has 32 students ,can he open enough packs to ...
*Sunday, October 19, 2014 at 12:50am*

**math**

amy made bags filled with M&M's and skittles. She used 48 M&M's and 30 skittles. she used the same number of each candy in every bag. what is the maximum number of bags she could make?
*Saturday, October 18, 2014 at 10:18pm*

**Math**

Tina is trying to choose finger food for her party. She is choosing between 5 types of nuts, 5 types of crackers, and 4 types of cheese. If Tina chooses one of each,how many combinations does she have to choose from?
*Saturday, October 18, 2014 at 8:54pm*

**math**

Point e is located at (-2,2) and point f is located at (4,-6). Whats the distamce between points e amd f?
*Saturday, October 18, 2014 at 8:53pm*

**Math**

Find the number 4 three times in the table . Write multiplication sentences and division sentences for each 4 . Answer; 1/1*4=4 2/ 2*2=4 3/4*1=4 1/ 4divide 1=4 2/ 4 divide 2=2 3/ 4 divide 1=4 Q2/Name five numbers that are found only once in the table. Answer: 1*1 ,2*2 , 3*3 , ...
*Saturday, October 18, 2014 at 8:42pm*

**Math**

A biologist has a 36% solution and a 14% solution of the same plant nutrient. How many cubic centimeters (cc) of each solution should be mixed to obtain a 25 cc of a 25% solution? I been looking at this for 2 hours please help
*Saturday, October 18, 2014 at 7:19pm*

**math**

it is a 3 digit number all the digits are different the first and second digits are multiple of 3 the first digit is greater than the second digit. the sum of the first two digits is 7 more that the third digit the number is not a multiple of 5 the third digit is greater than 3
*Saturday, October 18, 2014 at 6:57pm*

**Math**

A glass of skim milk supplies 0.1 mg of iron and 8.2 g of protein. A quarter pound of lean red meat provides 3.75 mg of iron and 21 g of protein. If a person on a special diet is to have 7.36 mg of iron and 73 g of protein, how many glasses of skim milk and how many quarter-...
*Saturday, October 18, 2014 at 6:22pm*

**Math**

A women has $500,000 invested in two rental properties. One yields an annual return of 14% on her investment, and the other returns 10% per year on her investment. Her total annual return from the two investments is $59,000. How much is invested at each return?
*Saturday, October 18, 2014 at 5:48pm*

**Math**

A bank lent $260,000 to a company for development of two products. If the loan for product A was for $77,000 more than that for product B, how much was lent for each product?
*Saturday, October 18, 2014 at 5:47pm*

**Math**

Several cows from a Caribou Herd took 4 days longer to travel 70km to Forde Lake, than it took them to travel 60km north beyond forde lake.They averaged 5km/h less before Forde lake because the foraging was better. What was their average speed for the part beyond forde lake?
*Saturday, October 18, 2014 at 5:46pm*

**math**

I'm wonder if im correct? Two physics students built a model rocket for a class project. Once the rocket is launched, its height in feet, h(t), can be found using the height function h(t) = -16t² + 96t where t represents time in seconds my work: 0=-16t^2+96t = -16t(t-...
*Saturday, October 18, 2014 at 5:17pm*

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