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November 25, 2014

Homework Help: Math

Branches of Math

Recent Math Questions

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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
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

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 2:17pm

Stasticstics/math
A teacher wants to compare the mean geology scores of two different classes. She is testing the null hypothesis that there is no difference in the population mean scores of the two classes. The difference of the sample means is 51.4. If the standard deviation of the ...
Tuesday, October 14, 2014 at 1:53pm

Foundations and Pre-Calculus Math 10
Find the radius of a cone with a height of 3m and a volume of 30m cubed. So far I have 90m cubed / 3m = pi(r^)3m/3m. Then I get stuck. Help! I'm really bad at math. ):
Tuesday, October 14, 2014 at 1:30pm

Math
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 ...
Tuesday, October 14, 2014 at 1:17pm

math
In a suspension bridge, the shape of the suspension cables is parabolic. The bridge shown in the figure has towers that are 400 m apart, and the lowest point of the suspension cables is 100 m below the top of the towers. Find the equation of the parabolic part of the cables, ...
Tuesday, October 14, 2014 at 12:24pm

Math
what is 603kg = ? g. I don't get how to do the problem
Tuesday, October 14, 2014 at 12:17pm

Math
A sphere has a volume of 200m3 . What is the volume of the smallest cube that this sphere would fit inside of? (Hint: try drawing a diagram of a side or top view of this situation)
Tuesday, October 14, 2014 at 11:39am

Math 116
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.
Tuesday, October 14, 2014 at 11:32am

Math 130
Can i find the perimeters of the following figures Square Rectangle and Circle
Tuesday, October 14, 2014 at 10:26am

Math
Larry and Gary are discussing whose garden has the most area to plant flowers. Larry claims that all they have to do is walk around the two gardens to get the perimeter and the one with the greatest perimeter has the greatest area. How would you help these students?
Tuesday, October 14, 2014 at 10:15am

3 grade math
How can I find the area of an angle?" How do you respond?
Tuesday, October 14, 2014 at 9:54am

Math
If john makes 60 k a year , how much does he make each month?
Tuesday, October 14, 2014 at 9:23am

Math
ABCDEF is a regular hexagon. If BA and CD are extended until they intersect, what is the measure of the angle formed?
Tuesday, October 14, 2014 at 8:55am

math prajishaa
if 10% is vat is charged on an article bought by sandeep for rupees 6930 what is the selling price of the article
Tuesday, October 14, 2014 at 8:40am

math usha kk
a refrigerator is marked at rupees 14500 if 16%vat is charged find the total amount that she will have to pay to the shopkeeper
Tuesday, October 14, 2014 at 8:35am

math prasad vk
by selling a saree for rupees 2000 the shopkeeper made a profit of 20% what was the cost price of the saree
Tuesday, October 14, 2014 at 8:24am

math school g
salman purchased 8 wood panels for rupees 1500 each for transporting them to his shop he had spend rupees 800 he then gave the panels a veneer wich cost him rupees 8000 he sold 4 panels for rupees 3200 each calculate his total profit or loss %
Tuesday, October 14, 2014 at 8:09am

Math
Are the statements Always, Sometimes or Never. Please explain why. Thanks. 1. An equilateral polygon is regular. 2. The greater the number of sides of a regular polygon, the smaller the measure of any of its exterior angle. 3. The sum of the measures of the interior angles of ...
Tuesday, October 14, 2014 at 4:08am

Math
1. The measure of an interior angle of a regular polygon is 20 more than thrice the measure of its adjacent exterior angle. Find the number of sides of the polygon and its total number of diagonals. 2. Find the sum and difference between the sum of the measures of the interior...
Tuesday, October 14, 2014 at 3:34am

math
Determine whether the fractions in each of the following pairs are equal: a: a^2/b and a^2b/b^2 b: 377/400 and 378/401 c: 0/10 and 0/-10 d: a/b and a+1/b+1, where "a" is not equal to "b" or a =/= b
Tuesday, October 14, 2014 at 3:06am

math
Yoon Ki drove from Phoenix to tucson in 1 1/2 hours. then she drove from tucson to el paso in 4 3/4 hours. the second part of her trip was how many times as long as the first part.
Tuesday, October 14, 2014 at 2:16am

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 ...
Tuesday, October 14, 2014 at 12:44am

Math
Write a paragraph proof of this theorem: In a plane, if two lines are perpendicular to the same line, then they are parallel to each other
Tuesday, October 14, 2014 at 12:36am

math
I need to know how to find a number that makes the statement true so that I can help my daughter. 1/2 < ?/8
Tuesday, October 14, 2014 at 12:05am

math
compare and contrast: below are two equations. solve each equation and compare the two solutions. choose the statement that is true about each solution. equation #1 2x-3=-17 5x+3=12 A. equation #1 and equation #2 have the same number of solutions B. equation #1 has more ...
Monday, October 13, 2014 at 11:17pm

program planning
Learning to make candy from a recipe would relate most directly to which two of the 13 activity areas? A. Math and science B. Social studies and science C. Cooking and math D. Social studies and cooking 
Monday, October 13, 2014 at 11:11pm

math
Each time Lucy uses her credit card she earns points from the credit card company. For every 100 dollars she spends she earns 50 points. Choose the equation that accurately represents the relationship between the two variables: m = amount of money spent, and p = total number ...
Monday, October 13, 2014 at 11:09pm

math
Prove that:(3-4sin^2A) (1-3tan^2A)=(3-tan^2A)(4cos^2A-3)
Monday, October 13, 2014 at 11:06pm

Math
In a polynomial like 5x^5 + 4x^2 + 2, is 2 counted as a term?
Monday, October 13, 2014 at 10:38pm

Math
Write a paragraph proof of this theorem: In a plane, if two lines are perpendicular to the same line, then they are parallel to each other.
Monday, October 13, 2014 at 9:48pm

Math
In a circuit, the voltage, V, is given by the formula V = IZ, where I is the current and Z is the impedance. Both the current and impedance are represented by complex numbers. Find the voltage if current is 3 + 2i and impedance is 4 - i.
Monday, October 13, 2014 at 9:36pm

Math
luc has 1 h of homework to do. He has assignments to complete for social studies and math, and a science test. he sepends 2/5 of the time completing the social studies assignment, and 1/3 of the time on math. How much time does Luc have left to study for the science test?
Monday, October 13, 2014 at 9:27pm

Math
According to the 2010 census data , the population of Texas was about 2.5*10^7 people. The land area of Texas is about 2.6*10^5 m^2. Divide the average number of people per square mile in 2010. A. 0.96*10^2 B. 9.6*10^1 C. 0.96*10^35 D. 9.6*10^12 Is the answer A?
Monday, October 13, 2014 at 9:16pm

Math
Find the Synthetic Division: (10x^4-50x^3-800)/(x-6)
Monday, October 13, 2014 at 9:16pm

math
Find two positive decimals a and b that make the following statement true. Then find two positive decimals a and b that make the statement false. If a < 1 and b < 1, then a ÷ b < 1.
Monday, October 13, 2014 at 9:15pm

Math
Which is irrational? A. 0.117117117... B. 0.8596873205... C. 0.812812812812... D. 0.605605605... Is the answer B?
Monday, October 13, 2014 at 8:58pm

math physics
A meteorite is a solid composed of stone and/or metal material from outer space that passes through the atmosphere and hits the earth’s surface. Find the kinetic energy of a meteorite with mass 250 kg that hits the earth at 25 km/s. Given: m=250kg v=2.5E4m/s <<< ...
Monday, October 13, 2014 at 8:54pm

math physics
A meteorite is a solid composed of stone and/or metal material from outer space that passes through the atmosphere and hits the earth’s surface. Find the kinetic energy of a meteorite with mass 250 kg that hits the earth at 25 km/s. Given: m=250kg v=2.5E4m/s <<< ...
Monday, October 13, 2014 at 8:54pm

math physics
A meteorite is a solid composed of stone and/or metal material from outer space that passes through the atmosphere and hits the earth’s surface. Find the kinetic energy of a meteorite with mass 250 kg that hits the earth at 25 km/s. Given: m=250kg v=2.5E4m/s <<< ...
Monday, October 13, 2014 at 8:54pm

Math
Harold bought two loaves of raisin bread to share with his friends. If there are 12 people total, including Harold, how much bread does each person have? A. 0.06 B. 0.16 THE 6 keeps going on C. 0.25 D. 0.3 And the 3 keeps going on Is the answer C?
Monday, October 13, 2014 at 8:50pm

math
there are 40 students at Bali high who plays stringed instruments. of these, 1/4 play viola, 1/5 play cello, and the rest play violin. how many students play violin?
Monday, October 13, 2014 at 8:47pm

Math
One nanometer is about 0.00000003937 of an inch. What is this number in scientific notation? A. 3.937*10^-8 B. 3.937*10^8 C. 39.37*10^-7 D. 39.37*10^7 Is the answer A? Thanks
Monday, October 13, 2014 at 8:41pm

Math. Word problem
Strawberries are on sale for $2.30 per pound. Noah bought a bag of strawberries for $8.05. How many pounds of strawberries did Noah buy?
Monday, October 13, 2014 at 8:31pm

Math Proof
Let {X_n} be a sequence of real numbers that is bounded above by M and such that X_n-->x Prove that x<=M
Monday, October 13, 2014 at 8:30pm

Math
If there is 1/2 if a pizza and Jonas wants only 1/3 of it, how much of the pizza will he eat? A. 1/5 B. 2/5 C. 1/6 D. 2/6 Is the answer B? Thanks
Monday, October 13, 2014 at 8:27pm

Math
The king's ship sank with 8 gold bars aboard. The king paid captain nemo 4/5 of one bar for finding the gold. The captain gave 1/2 of his gold to charity. What fraction of a bar went to charity?
Monday, October 13, 2014 at 8:26pm

Math
What is 0.32 written as a fraction in simplest form/ A. 32/100 B. 8/25 C. 100/32 D. 16/25 Is the answer B? Thanks
Monday, October 13, 2014 at 8:21pm

math
t has been discovered in a certain state that the relationship between the number of snow shovels demanded varies linearly with its price. When the price per item was $ 38 ,2200 items were demanded; When the price was $ 49 , 2125 items were demanded. Determine the price per ...
Monday, October 13, 2014 at 8:05pm

Math
Divide. Write the answer in simplest form. 8 1/6 divided by 2 1/24. I got 4 5/6 is this right? If so what's the simplest form.
Monday, October 13, 2014 at 7:56pm

Math
What percent o the student population are girls? Please show work!
Monday, October 13, 2014 at 7:37pm

math
equivalent expression -3(x-7)
Monday, October 13, 2014 at 7:26pm

math
total salary is $6650000 per year total gross area it service is 3.5*10000000 squar feet the unit cost, in dollars per square foot,for this group is
Monday, October 13, 2014 at 7:23pm

math
whats is 0.5l/s=gal/h
Monday, October 13, 2014 at 7:22pm

Math
Xander says that the place value sections method, the expanded notation method, and the algebraic notation method of multiplying a one-digit number by a two-digit number are pretty much the same. Do you agree or disagree? Explain.
Monday, October 13, 2014 at 7:06pm

math
The function y_p(t) =ln(4 + 2 t), t > -4/2, is a particular solution to the differential equation y''+8y=g(t). Find g(t).
Monday, October 13, 2014 at 6:42pm

Math
Where should the decimal be placed in the product of the following problem? (1.632) (0.81)=132192
Monday, October 13, 2014 at 6:40pm

Math
Find the Synthetic Division: (10x^4-50x^3-800)/(x-6)
Monday, October 13, 2014 at 6:39pm

Math
The equation -4x+y=0 relates to the number of pages in a photo album y to the number of picture sin the album x. Tell whether the relationship is a direct variation.Explain
Monday, October 13, 2014 at 6:34pm

Math
Write a real-world context for the following ratio: Five to three
Monday, October 13, 2014 at 6:33pm

math
7x4-4 devided 2=26
Monday, October 13, 2014 at 6:26pm

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