Friday
October 31, 2014

Homework Help: Math

Branches of Math

Recent Math Questions

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math
kamala had 5026 grams of flour in a canister. she bought a 4157 gram bag of flour. she poured some flour from the bag to the canister. as a result, the mass of the flour in the canister is now twice the mass of the flour left in the bag. how much flour is in the bag now?
Friday, October 31, 2014 at 9:04am

Math
How do i find the length of a projection of a vector A=3x+y+2z on the xy plane? and how do i find the unit vector in the xy plane that is perpendiculer to vector A?
Friday, October 31, 2014 at 8:25am

Math
Randolph runs a home appliance repair business and charges a service call fee of $85 plus $15 per half hour for his labour. Write an equation for calculating the total charges, C, in terms of hours of labour, H. Plot the graph of C vs. H and define the slope and C-intercept of...
Friday, October 31, 2014 at 7:42am

Math
a) prove the identity: Ax(BXC)=B(A*C)-C(A*B) A,B,C vectors x- cross product *-dot product b) use part a) to prove that cross product is not associative.
Friday, October 31, 2014 at 4:13am

Math Please Check
Please tell me if this are right. Thank you! Find the exact location of all the relative and absolute extrema? h(t) = t^3 - 3t^2 domain: [-1, + infinity) For this one I got x=2 as the minimum, and x=0 as the maximum. g(t) = 3t^4 - 16t^3 + 24t^2 +1 domain: (-infinity, +infinity...
Thursday, October 30, 2014 at 11:00pm

math
How can u write a unit rate if a least one term is a fraction? How is this different from writing a unit rate where both terms are whole numbers?
Thursday, October 30, 2014 at 10:52pm

Math
show how to make one addend the next tens number and complete the new addtion sentence. This question has cubes but it also has 22+49= ___+____=
Thursday, October 30, 2014 at 10:37pm

math thanks for your help
let f(x)=-4x+7. find and simplify f(n) f(n)=_____ simplify your answer
Thursday, October 30, 2014 at 10:29pm

Math
6 km to miles and the nearest yard? 6km*1mi/1.609km=3mi But how do I get to the yards from converting because my data booklet doesn't tell me 1yd=?km.
Thursday, October 30, 2014 at 10:24pm

math
Karen collects 6/7 quart of rainwater. She uses ½ of the water to clean her bicycle and uses the remaining water equally for 3 houseplants. What volume of water does she use for each houseplant?
Thursday, October 30, 2014 at 9:42pm

math
after 3/4 of a minute a sloth has move just 3/8 of a foot. what is the sloth,s speed in feet per minute?
Thursday, October 30, 2014 at 9:35pm

Math 11
A triangular pyramid has faces that are all equalatetal triangles. Each side length is 16 cm. What is the surface area of the pyramid?
Thursday, October 30, 2014 at 9:05pm

math
let f(x)=-5x+6 find and simplify f(x+2) f(x+2)=___
Thursday, October 30, 2014 at 9:05pm

Math
916:3= 305
Thursday, October 30, 2014 at 9:04pm

math really need help!
let f(x)=-5x+6 find and simplify f(x+2) f(x+2)=___
Thursday, October 30, 2014 at 8:58pm

math
It is greater than 43ànd less than 52. If you add the digits. The sum is 8 write the number word
Thursday, October 30, 2014 at 8:32pm

math please help
let f(x)=-5x+6 find and simplify f(x+2) f(x+2)=____
Thursday, October 30, 2014 at 8:21pm

Math-urgent-
What's 11/12 divided by 3/4 in repeated subtraction?
Thursday, October 30, 2014 at 8:20pm

Math
if 150 vehicles passed luann how many more minivans than cars would you expect to pass her assume the rate continues
Thursday, October 30, 2014 at 7:11pm

math
kaya is making dream catchers. each dream catchers uses 6 feathers. she makes 4 dream catchers with black feather 3 with brown 1 with white and 2 with gray. what fraction of the dream catcher have either black or brown feather
Thursday, October 30, 2014 at 6:54pm

math
there are boxes of tangerines each box has 93 tangerines the Tangerines will be divided equally among 9 classrooms how many tangerines will each classroom get
Thursday, October 30, 2014 at 5:58pm

Math
if a flagpole is 20ft tall and casts a shadow of 27ft how tall is a building that casts a shadow of 185ft? write a proportion and solve. round your answer to the nearest foot.
Thursday, October 30, 2014 at 5:52pm

7th grade math
Can you check my answers? 1. 48lbs 6oz - 19lbs 9oz = 47lbs 22oz - 19lbs 9oz Ans: 38lbs 13oz 2. 3weeks 5days x 8 = 24weeks 40days; 40days=8weeks Ans: 32weeks 3. 49 people are in line to see a movie. 17 are in front of Jackie. How many are behind her? 49 - 18 = 31 Ans: 31 people...
Thursday, October 30, 2014 at 5:48pm

Math
Write the slope intercept form fo an equation of the line that passes through the given point and has the given slope 1. Point (1,1) Slope 1/4 Formula y-y1=m(x-x1) Answer : y=1/4x+0
Thursday, October 30, 2014 at 5:46pm

Math
equation is J=0.15h J=total cost, h=hats How much would it cost to buy 10 hats? calculate the total cost and show how you got the answer. would it be J=0.15*10 ? thank you
Thursday, October 30, 2014 at 5:45pm

Physics Math
A flat-bottom river barge is 30.0 ft wide, 85.0 ft long, and 15.0 ft deep. (a) How many ft3 of water will it displace while the top stays 3.00 ft above the water? (b) What load in tons will the barge contain under these conditions if the empty barge weighs 160 tons in dry dock?
Thursday, October 30, 2014 at 5:42pm

Math
Arrange the following real numbers in order from greatest to least: 0.8, 0.8(repeating 8), 0.89(repeating 89), 0.889( repeating the second 8 and 9), and 0.88. I think I got it, but just want to make sure.
Thursday, October 30, 2014 at 5:35pm

math
f(x)= x^3 - 2x^2 - 21x - 18 all possible rational zeros # of possible positive zeros # of possible negative zeros find all the real zeros
Thursday, October 30, 2014 at 5:21pm

math
a box of chalk and 2 staplers costs $10. 3 boxes of chalk and 2 staplers costs $18. find total cost of 1 box of chalk and 1 stapler
Thursday, October 30, 2014 at 5:06pm

math
two types of sandwiches were made for a tea party. 55% of the sandwiches were cheese sandwiches and the rest were chicken. If there were 252 chicken sandwiches, how many sandwiches were made altogether?
Thursday, October 30, 2014 at 4:40pm

Math
You have a recipe for homemade cookies that makes 5 batches.if the recipe calls for 3 and 1/3 cups of milk, how much milk would you need to make 1 batch?
Thursday, October 30, 2014 at 4:34pm

math
there are 6 purple socks and 4 orange socks in a drawer. zucky picked one sock without looking and then another without looking or replacing the first. what is the probability that he picked 2 purple socks?
Thursday, October 30, 2014 at 4:11pm

Math
x + 3 = 1 2 5 4 what is x?
Thursday, October 30, 2014 at 3:57pm

Math
X/2 + 3/5 = 1/4
Thursday, October 30, 2014 at 3:27pm

Math/Physics
The potential at the surface of a sphere (radius R) is given by V_0 = k cos 3theta where k is constant. Find the potential inside and outside the sphere as well as the surface charge density (lower case sigma(theta)) on the sphere. (assume there is no charge inside or outside ...
Thursday, October 30, 2014 at 3:14pm

Math/Physics
My question is this: The potential at the surface of a sphere (radius R) is given by V_0 = k cos 3theta where k is constant. Find the potential inside and outside the sphere as well as the surface charge density (lower case sigma(theta)) on the sphere. (assume there is no ...
Thursday, October 30, 2014 at 2:45pm

Math
Solve the quadratic function y=2x^2-14x -16 by completing the square. Round roots to the nearest hundredth, if necessary. Show your work.
Thursday, October 30, 2014 at 1:43pm

MATH
How many 134foot pieces of ribbon can be cut from a piece of ribbon that is 36 feet long?
Thursday, October 30, 2014 at 1:43pm

math
what is the maximum speed of a stationary bike set at a constant resistance rate of 2 kilopounds? how far could you travel in 12 minutes and 54 seconds?
Thursday, October 30, 2014 at 12:42pm

Math--1 question?
For which set of data is the median 15? 89, 75, 90, 15, 74, 88, 89 23, 35, 77, 81, 64, 15, 44 14, 15, 15, 15, 18, 18, 19, 19, 20 8, 20, 17, 21, 14, 15, 9
Thursday, October 30, 2014 at 12:20pm

MATH ASAP
identify the underlined place in 63.264. Then round the number to that place. thousandths; 63.26 hundredths; 63.26 hundredths; 63.27 thousandths; 63.27 2. The average annual rainfall in Miami, Florida is 61.93 inches. The average annual rainfall in Indianapolis, Indiana is 42....
Thursday, October 30, 2014 at 12:09pm

Math question
7. What is the best measure of central tendency for the data? What answer do you get using this measure? red blue green brown red pink orange mode; red median; green mean; red mode; pink
Thursday, October 30, 2014 at 11:44am

Math help!
Point E is located at (-2,2) and point F is located at (4,-6). What is the distance between points E and F? A. square root 52 B. square root 28 C. 10 D. square root 20 Is the answer A? Thank you
Thursday, October 30, 2014 at 10:37am

Math
A marine biologist is testing a new under water probe. The probe is catapulted from the ship into the air, descends under water to a predetermined depth, and then returns to the surface where it can be collected. The function that models the probe’s path is f(x) = 15t2...
Thursday, October 30, 2014 at 10:00am

Math help!
Which of the triangles described in the table is a right triangle. Table Triangle Q, Side 1=25 Side 2=10 Side 3=15. Triangle R, Side 1=26 Side 2=20 Side 3=46. Triangle S, Side 1=25 Side 2=20 Side 3=1,025. Triangle T, Side 1=25 Side 2=26 Side 3=650. A. Q B. R C. S D. T Is the ...
Thursday, October 30, 2014 at 9:43am

Math help!
The length of the hypotenuse of a right triangle is 13 m. The length of one leg is 5 m. Find the length of the other leg. A. 14 cm B. 144 cm C. 8 cm D. 12 cm Is the answer C? Thank you
Thursday, October 30, 2014 at 9:29am

Math help!
Find the length of the hypotenuse of a right triangle with legs of 9 cm and 12 cm. A. 8 cm B. 21 cm C. 15 cm D. 225 cm Is the answer C? Thank you
Thursday, October 30, 2014 at 9:10am

math
Katrina is studying the effect of foreign substances on bacteria populations. If she introduces a beneficial substance, such as food, the bacteria population grows. If she introduces a harmful substance, such as a poison, the bacteria population decreases. The function f(x) = ...
Thursday, October 30, 2014 at 8:50am

business math
6 less than 1/4 of c translated into a expression
Thursday, October 30, 2014 at 1:47am

Math
Nathan is designing a box to keep his pet newt in. To make the box, he’s going to start with a solid rectangle and cut squares with sides x cm in length from each corner, as shown in the picture below. The dimensions of the of the solid rectangle are 51 cm by 45 cm. The ...
Thursday, October 30, 2014 at 12:35am

Math
150 men live in a certain town: 85 are married 70 have a cell phone 75 own a car 55 are married and have a cell phone 35 have a cellphone and a car 40 are married and have car 30 are married, have a car and have a cellphone. How many men are single and do not have a car? How ...
Thursday, October 30, 2014 at 12:32am

math
Please help I'm so confused!!!! 1. Which two square roots are used to estimate the square root of 5? a. square root of 1 and 2 b. square root of 2 and 4 c. square root 4 and 9 d. square root of 9 and 16 2.Which two square roots are used to estimate square root of 43? a. ...
Wednesday, October 29, 2014 at 10:44pm

math
What is the d value of the following arithmetic sequence? 5, 2, -1, -4, -7,… A. 3 B. -3 C. 4 D. -4
Wednesday, October 29, 2014 at 10:31pm

math
Find the first arithmetic mean between 100 and 135 given the following sequence: ..., 100, ___, ___, ___, ___, 135, ... A. 107 B. 114 C. 121 D. 128
Wednesday, October 29, 2014 at 10:30pm

Math
What is the equation and the answer to717✖451
Wednesday, October 29, 2014 at 9:48pm

Math
What is the equation 745✖876
Wednesday, October 29, 2014 at 9:09pm

math
suppose February has 29 days. Explain how you can find how many days there are in the year without counting or adding. explain an example please....
Wednesday, October 29, 2014 at 8:49pm

math
A biker traveling with a velocity of 80 feet per second leaves a 100 foot platform and is projected directly upward. The function modeling the projectile motion of the biker is s(t)=-16t^2+80t+100,where s(t) is the height and t is the number of seconds the biker is in the air...
Wednesday, October 29, 2014 at 8:42pm

Math
how do I find out how to list 7/10, 5/8, and 3/7 from greatest to least
Wednesday, October 29, 2014 at 8:40pm

math
A manufacturing company finds that the daily cost of producing x items of a product is given by c(x)=210x + 7000. Find x using calculus
Wednesday, October 29, 2014 at 8:30pm

math
of the students in ms Martinez class 11/24 walk to school. another 3/8 of the students ride their bikes to school. what fraction more of students walk than ride their bikes to school.
Wednesday, October 29, 2014 at 8:29pm

Math
How would you estimate 566 divided by 81?
Wednesday, October 29, 2014 at 8:16pm

math
I spent 2/3 of my money at store A. I spent 1/3 of my money at store B. When I left store B I had $4. How much money did I have when I entered store A?
Wednesday, October 29, 2014 at 8:10pm

currency exchange/ math
Timothy sold US$130 to a bank when the exchange rate was C$1 = US$0.9315. The bank charged him a commission of 0.55%. How many Canadian dollars did he receive from the bank for US$130?
Wednesday, October 29, 2014 at 7:55pm

math
For 9- complete the operation and explain why you placed the decimal point where you did. 9. 1.8*0.3=
Wednesday, October 29, 2014 at 7:54pm

math
Anna is twice as old as Julian.five years ago,eye was three times as old .let x be julian`s present age write an equation for x and find the present ages of Anna and julian
Wednesday, October 29, 2014 at 7:54pm

math
Jordan bought 6 8/10 yards of pink ribbon and 3 1/4 yards of purple ribbon. how much more pink ribbon than purple ribbon did she buy.
Wednesday, October 29, 2014 at 7:49pm

math
George cycles to go half the distance at 4m/s but slows to 3m/s for the second half of his trip.he takes 35minutes to complete the trip.find the distance he travels
Wednesday, October 29, 2014 at 7:41pm

math
Frances walks half the distance at 5km/h and ru the other half at 10km/hit the total time for her journey is 3 hours,what is the distance
Wednesday, October 29, 2014 at 7:37pm

Math
Limit as n goes to infinity of ((2n)!/(n^n)).
Wednesday, October 29, 2014 at 7:34pm

math
Anthony is twice as old as Julian.5years ago,he was three times as old .let x be julian`s present age find the present ages of anthony
Wednesday, October 29, 2014 at 7:33pm

math
The drama club has $500 to put on a play. The club can spend up to 3/8 of the money on new costumes. How much money can they spend on other supplies?
Wednesday, October 29, 2014 at 7:33pm

math
Chris is determining the amount of raisins he will use for a raisin bread recipe. The ratio of cups of raisins: number of loaves Chris used is 3 raisins to 2 loaves. Which ratio is equivalent to the rate of raisins to loaves of bread that Chris can use?
Wednesday, October 29, 2014 at 6:29pm

Math
A bike is in fourth gear. When the pedals turn 3 times, the rear wheel turns 7 times. When the pedals turn twice, how many times does the rear wheel turn?
Wednesday, October 29, 2014 at 5:51pm

Math
Find the radius of a sphere with a volume of 1,767.1 m (3 cubed) would I use the formula V=4/3*pie*radius (3 cubed)
Wednesday, October 29, 2014 at 5:34pm

math- bc calc
a building is 36 ft tall. A pulley is attached to the top of the building. A rope is looped through the pulley. One end of the rope is attached to the lantern that hangs vertically parallel to the side of the building. The rope passes up vertically from the lantern, through ...
Wednesday, October 29, 2014 at 3:10pm

Math
Each digit in the division example has been replaced with the same letter throughout. (r stands for remainder.) The digits used wher 1,2,3,4,5,7,and 9. Find the numbers SU rE ------ )CAN -CU ------- IN - IU ------- E
Wednesday, October 29, 2014 at 2:25pm

Math
Dominick is in charge of ordering supplies for harry's hamburger stand. hamburger buns come in packs of 12 and frozen hamburger patties come in packages of 20. he must have the same amount of rolls as patties. What is the least number of packages of each that he must order.
Wednesday, October 29, 2014 at 2:10pm

Math
Solve (x+4)(x-9)=0
Wednesday, October 29, 2014 at 1:14pm

Math
A projectile is shot vertically into the air. Its height, h, in metres, after t seconds is approximately modelled by the relation h=-5t^2+120t+125: c) For how many seconds is the projectile in the air? (1 mark)
Wednesday, October 29, 2014 at 1:11pm

Math
Mary is twice as old as Jane,the sum of squeres of their age is 125.How old is Jane?
Wednesday, October 29, 2014 at 1:07pm

Math
The formula l=8t^2/pi^2 represents the swing of a pendulum. In this formula, l is the length of the pendulum, in feet, and t is the time, in seconds, it takes to swing back and forth once. Whst is the length of a pendulum that makes one swing in 2s? Please help!! Thank you for...
Wednesday, October 29, 2014 at 12:26pm

math algeba
Need to simplify scientific notation.(8.76x109(6.52x10-3(13.27x10-5)​
Wednesday, October 29, 2014 at 12:11pm

MATH FOR THE OFFICE
THE BEGINNING OF THE WEEK A STOCK SOLD 29 3/8 PER SHARE AT THE END OF THE SAME WEEK IT SOLD FOR 31 2/8 WHAT WAS THE AMOUNT OF INCREASE PER SHARE?
Wednesday, October 29, 2014 at 11:09am

Math Help Please! ASAP!
Solve each inequality 1. y+5>7 y<2 y<12**** y>2 y>12 2. p+12>9 p>21 p>3 p>-21 p>-3**** Are my answers correct?
Wednesday, October 29, 2014 at 11:08am

math
from a boat, the angle of elevation of the foot of a lighthouse on the edge of a cliff is 34 degrees. if the cliff is 150m high, how far from the base of the cliff is the boat
Wednesday, October 29, 2014 at 5:13am

math
Triangle ABC has coordinates A(1,4);B(3,-2);and C(4,2).Find the coordinates of the image A'B'C'?
Wednesday, October 29, 2014 at 1:24am

Math Physics
Find the water pressure at ground level to supply water to the third floor of a building 8.00 m high with a pressure of 325 kPa at the third level So the given is h=8.00 Ptop=325kPa Density water = 1000 Would I need to set it up like 325+1000*9.81*8.00
Tuesday, October 28, 2014 at 11:09pm

Math Demand Functions
Given the function q=D(x)=k/x^n where k is a positive constant and n is an integer greater than 0. How would you find the elasticity of the demand function After you find the der. what do you do?
Tuesday, October 28, 2014 at 10:57pm

Math
Find x-value of all points where function has relative extrema and find the Values of these extrema. f(x)= (x^2)/(ln(x))
Tuesday, October 28, 2014 at 10:25pm

Math
Is the following statement always, sometimes, or never true for numbers greater than zero: "In equivalent ratios, if the numerator of the first ratio is greater than the denominator of the first ratio, then the numerator of the second ratio is greater than the denominator...
Tuesday, October 28, 2014 at 10:14pm

math
0.205 or 0.21
Tuesday, October 28, 2014 at 10:06pm

Math
Please help..not wanting answer just where to start... A cylinder has a radius of 5 centimeters and a height of 12 centimeters. What would the height of a cone need to be if it is the same volume and radius?
Tuesday, October 28, 2014 at 9:01pm

Math
14 boys play basketball, 12 boys play soccer, 16 boys play baseball. How many boys play basketball, soccer, or baseball?
Tuesday, October 28, 2014 at 8:42pm

Math
javia ran 8 laps around a track to run a total of 1 mile on monday. How many laps will she need to run on tuesday to run 3/8 of a mike?
Tuesday, October 28, 2014 at 8:31pm

Math
If you had 4 cakes each cut in tents by noon 4\5 We're sold how many pieces were sold by noon
Tuesday, October 28, 2014 at 8:26pm

math
Jill's fish weighs 8 times as much as her parakeet. Together, the pets weigh 63. How much does the fish weigh? This is 4th grade .
Tuesday, October 28, 2014 at 7:53pm

Math
A cylinder has a radius of 5 centimeters and a height of 12 centimeters. What would the height of a cone need to be if it is the same volume and radius?
Tuesday, October 28, 2014 at 7:51pm

math
If two triangles are similar one is 16 by 6 the other 5 by?
Tuesday, October 28, 2014 at 7:30pm

math
Can you write3+5+6=14 as a multiplicacion sentence? Explain.
Tuesday, October 28, 2014 at 7:13pm

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