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April 23, 2014

Homework Help: 8th Grade

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8th grade science
radiation is produced by the Sun's UV rays. (UV means Ultra violet). They are sometimes harmless, because radiation is everywhere. But too much exposure can cause harm to you.
Wednesday, March 24, 2010 at 11:37pm

8th grade science
a 10-liter sample of one type of crude oil has a mass of 8.20kg. What i the density? If this oil spilled on the ocean's surface, would it sink or float? explain answer in terms of density.
Wednesday, March 24, 2010 at 9:41pm

8th grade Math
90+45= 135 180-135= 45
Monday, March 8, 2010 at 3:35pm

8th grade science
They must be teaching you Newton's Second Law F = m a You can probably guess what the F, m and a stand for. The answer will be in Newtons. I like to think of a Newton as the weight of the meat in a "quarter pounder", after cooking.
Friday, March 5, 2010 at 3:35pm

8th grade science
how do i solve this problem The Math Behind the LawHow much force is Mike applying to the 1000 kg car to make it accelerate at a rate of .05 m/s2?
Friday, March 5, 2010 at 2:46pm

8th grade science
how do i do this problem The Math Behind the Law How much force is Mike applying to the 1000 kg car to make it accelerate at a rate of .05 m/s2?
Friday, March 5, 2010 at 2:45pm

8th grade Math
i need some explanation on Area of Trapezoids and Parallelograms....? can some body explain how to find the area?
Wednesday, March 3, 2010 at 3:33pm

8th grade Math
Suppose you intend to spend no more than $60 buying books. Hardback books cost $12 and paperbacks cost $5. How many books of each type can you buy?
Thursday, February 25, 2010 at 12:25am

8th Grade Math
Draw and label a rectangle whose area is represented by the following expression; (x+1) (x+5). Then write an equivalent expression in expanded form. I have absolutly no clue how to do that. :/
Monday, February 22, 2010 at 8:26pm

8th grade Math
In a quadrilateral , angle CAB is divided into two comgruent angles by line AD. What is the measure, in degrees of angle DAB. Angle B and D are 90 degrees. angle C equals 45 degrees.
Tuesday, February 16, 2010 at 9:18am

8th grade
There is no table provided... not sure how to answer this. Substitute values of x from the table, and compare the calculated y-value with the table.
Monday, February 15, 2010 at 9:52pm

8th grade science
Please show me how to solve this problem. A person wearing a shoulder harness can survive a car crash if the acceleration is less that -300 m/s2. How far must the front end collapse if it crashes while going 101 km/hr? Thanks.
Sunday, February 14, 2010 at 10:07pm

8th grade science
Use energy to explain why dropping a ball from a height of one meter will not make the ball go 30 m/sec
Sunday, February 14, 2010 at 9:27pm

8th grade algebra
the length of a rectangular garden is 5 feet longer than its width. The garden is surrounded by a 2-foot-wide-sidewalk. The sidewalk has an area of 76 square feet. Find the dimensions of the garden
Thursday, February 11, 2010 at 11:17pm

8th grade
Can you make a sentence that is not to hard to understand using the words growth factor, exponential form, and decay factor?
Thursday, February 11, 2010 at 7:54pm

8th grade
Cut tulip or a tulip still growing? How much salt? This sounds like a good experiment for you to do.
Saturday, February 6, 2010 at 6:53pm

8th Grade Algebra Confusion
Bobpursley is right -- you must ask specific questions in order to get help. We have no access to your text or your assignments. So please post specific questions and let the teachers know what you understand about each one so far.
Wednesday, February 3, 2010 at 11:11am

8th Grade Algebra Confusion
Hi. I am starting a new section in Algebra, and I thought I understood it. But when I went to the back of my book to check the answers, they were way off. We are dividing and simplifying radical expressions and equations.
Wednesday, February 3, 2010 at 9:30am

8th grade math
Let X be the hours Maria drove. 5-X hours were then driven by Carlos. 53 X + 51(5-X) = 258 miles covered 53X - 51X = 2X = 258 - 255 = 3 X = 3/2 hour Carlos did most of the driving.
Friday, January 29, 2010 at 1:53am

8th grade
5 2's -- one way 4 2's 2 1's ---- number of ways = 6!/(4!2!) = 15 (e.g. 222211, 11222, 212122, etc ) 3 2's 4 1's ---- number of ways = 7!/(4!3!) = 35 2 2's 6 1's ---- number of ways = 8!/(2!6!) = 28 1 2 8 1's ---- number of ways = 9!/(1!8!) = 9 ...
Tuesday, January 26, 2010 at 11:02pm

8th grade
The Lateral area of a regular pyramid equals half the perimeter of the base times the slant height (L.A.=1/2pl) *so the little l is the slant hight
Tuesday, January 26, 2010 at 8:06pm

8th grade
Hey In Science were are learning about speed and motion and our teacher gave us the assignment to make a speed acrostic. Can I Get Some HELP?
Monday, January 25, 2010 at 8:15pm

8th grade
hi, if 20 oz of fish cost 4.59, how much would 6, 12, and 36 oz cost? how would i plot this on graph paper? thank you! maribeth
Sunday, January 24, 2010 at 2:23pm

8th grade
how does placement of spacers between the eye bolt and magnets affect the strenght of the magnets pull on the eye bolt?
Saturday, January 23, 2010 at 3:59pm

8th grade
a chess board has 64 squares if pieces occupy 19 squares how many squares are unoccupied?
Sunday, January 17, 2010 at 7:33pm

8th grade math
I think this site is gay, and resourceful! I think they can shove the site up all they're ass's!!!!!!
Tuesday, January 12, 2010 at 6:22pm

Math 8th grade
wiueewiuw 4uriuewiue eueiuaqw ur wueia u38485u e7383 ei EU 4ueuiewu743j e74ej euriw eieu euyej e4793 4e73
Monday, January 11, 2010 at 3:58pm

8th grade math
Volume = length * width * height If you are asked to find the length, width, or height, you must be given either values or other equations to solve for a variable.
Wednesday, January 6, 2010 at 8:37pm

8th grade
(7 x 4 + 5 to the second power) divided by (8 - 1 + 7 to the second power) = (7 x 4 + 5^2) divided by (8 - 1 + 7^2) = (28 + 25)/(7 + 49) = 53/56
Monday, January 4, 2010 at 10:09pm

8th grade
How do you evaluate (7 x 4 + 5 to the second power) divided by (8 - 1 + 7 to the second power)?
Monday, January 4, 2010 at 10:06pm

8th grade
The area of a rectangle is 45cm2. The height is one less than two times the base. what is the length of the base
Monday, January 4, 2010 at 3:14pm

Math
8th grade math. I cannot help my grandson with his math. I do not understand it myself. It is dealing with percentages. I do not understand it.
Thursday, December 31, 2009 at 12:40pm

Math, not "8th grade"
Assistance needed. Please type your subject in the School Subject box. Any other words are likely to delay responses from a teacher who knows that subject well.
Thursday, December 31, 2009 at 12:33pm

8th grade
Ms Pecho currently owes $637.50 in simple interest on a loan of $2500 at an annual interest rate of 17%. How long has she had the loan. This is his problem and I have no clue how to help him but I do know the answer he came up with is 18.77. That seems wrong to me.
Thursday, December 31, 2009 at 12:32pm

8th grade science
What law states that unlike charges attract each other while like charges repel each other?
Thursday, December 17, 2009 at 12:39pm

U.S History- 8th grade
What was the major difference between the three regions? (geographical difference) The regions are england, middle and southern.
Sunday, December 13, 2009 at 9:14pm

U.S History- 8th grade
What was the geography and economy like in the England colonies, middle colonies, and southern colonies? Do you guys know any good websites to check out?
Sunday, December 13, 2009 at 9:05pm

Math, not "8th grade"
Assistance needed. Please type your subject in the School Subject box. Any other words are likely to delay responses from a teacher who knows that subject well.
Friday, December 11, 2009 at 7:52am

Math, not "8th grade"
Assistance needed. Please type your subject in the School Subject box. Any other words are likely to delay responses from a teacher who knows that subject well.
Monday, December 7, 2009 at 8:56pm

8th grade
need help thank-you translate the verbal phrase into an inequality, then solve the inequality and graph your solution, the product of 6 and the difference of 6x and 3 is less than or equal to the product of -2 and the sum of 4 and 8x
Monday, December 7, 2009 at 8:55pm

8th grade science
To draw the nucleus, draw 14 small balls clustered together. Use one color for protons and another for neutrons. Don't forget the electrons orbiting around the nucleus. I hope this helps.
Saturday, December 5, 2009 at 11:53am

8th grade
you equation 2would be: $11.95 = $4.95 + .35x(<trying to find) (^total) (first, sub. 4.95 from both sides.) $7.00 = .35x (now, you divide each side by .35 to get X by its self.) 20=x OR x=20 (.35 didided by .35 will cancle each other out. you should be left with x=20. that ...
Thursday, December 3, 2009 at 1:02am

8th grade math
11.95 - 4.95 = $7.00 7.00 / 0.35 = ?
Wednesday, December 2, 2009 at 6:14pm

8th grade
FILM PROCESSING COSTS $4.95, PLUS 0.35 FOR EACH PICTURE PRINTED. MILAN PAID $11.95 FOR PROCESSING AND PRINTING. HOW MANY PICTURES DID HE HAVE PRINTED?
Wednesday, December 2, 2009 at 6:12pm

8th grade Algebra I (junior level math)
g/5 = 6/10 First, cross-multiply. 10g = 30 Then solve the equation. g = 30/10 g = 3 Now substitute 3 for g. 3/5 = 6/10 Aren't they the same?
Tuesday, December 1, 2009 at 7:28pm

8th grade Algebra I (junior level math)
How do i solve proportions? step by step answers plz!!!! EXAMPLE! g/5 = 6/10
Tuesday, December 1, 2009 at 7:23pm

8th grade Algebra I (junior level math)
Hello, I am currently in Unit 4-1 (Ratio, and Proportions) and I don't understand how pairs of ratios could form proportions. Could someone give me step by step instructions? Thank You
Tuesday, December 1, 2009 at 7:14pm

8th grade math
John has already saved $40 and wants to buy an I-Pod for $129 in 4 months. To find how much he should save each week he wrote the following equation: 40+16n=129.
Sunday, November 29, 2009 at 10:14am

8th Grade Social Studies
A. The House has authority to impeach the President. It does not need the Supreme Court's input, and the Court cannot issue "arrest warrants" for the President. After impeachment, the Senate tries him. So the answer is A
Saturday, November 28, 2009 at 12:07pm

8th grade math
Your problem is very confusing. You "need to know what two fractions when subtracted equal" then you list 3 fractions. Which two are to be subtracted. What do we do with the third one?
Friday, November 27, 2009 at 5:40pm

Algebra 1: 8th Grade
Any hot girls want to halla at pretty boy. ''It's Dj and I know you can see that, I'm a pretty rich dood, and all the boys wanna be that''.
Wednesday, November 25, 2009 at 4:53pm

8th grade math
5 to the tenth power times 5 to the eleventh power. Find the product or quotient and then write your answer using exponents.
Monday, November 23, 2009 at 12:10am

8th grade math
Hi i need one more example of this algebraic expression please. and explain please. Fig# Value 1 0 2 1 3 8 4 27 Math-Nick
Sunday, November 22, 2009 at 1:28pm

Math, not "8th grade"
Assistance needed. Please type your subject in the School Subject box. Any other words are likely to delay responses from a teacher who knows that subject well.
Sunday, November 22, 2009 at 1:19pm

Science, not "8th grade"
Assistance needed. Please type your subject in the School Subject box. Any other words are likely to delay responses from a teacher who knows that subject well.
Sunday, November 22, 2009 at 1:19pm

8th grade math
It looks like a progression from 2-5, with each number being cubed. 2^3 = 2 * 2 * 2 = 8 If you let n stand for the number in your first column, then these would be the algebraic expressions. (n + 1)^3 = 8 (n + 1)^3 = 27 And so on. I hope this helps.
Sunday, November 22, 2009 at 12:29pm

8th grade
Hi my class is doing a unit on patterns with algebraic expressions. And i need to find a difficult expression Figure# Term value 1 8 2 27 3 64 4 125 what is the algebraic expression and how did u do it? thank you. Math-Nick
Sunday, November 22, 2009 at 12:18pm

8th grade
Nathan Hale was the one that famously said "I only regret that I have but one life to lose for my country".
Wednesday, November 18, 2009 at 9:57am

8th grade Science
Please help need ideas I am building a 3D model of a plant and animal cell. I need to show diffusion and osmosis movement within the cell.
Sunday, November 15, 2009 at 8:34am

8th Grade Social Studies
like how they used the salt trade because they couldn't communcate, but I'm not exactly sure how the salt trade system worked, so I'm not sure what to draw
Thursday, November 12, 2009 at 8:40pm

8th grade
its in Algebra 1 ! the riddle is whom should you see at the bank if you need to borrow money. its 15 letters. a teller doesnt fit. i dont know ! i need help ! PLEASE
Wednesday, November 11, 2009 at 9:09pm

8th grade Clinton Junior High School
Divide powers means you subtarct the exponent Example (^ means "to the power of") 5^4 divided by 5^2 = 5^4-2 = 5^2 Secondteacher (look it up on Google) Trev
Monday, November 9, 2009 at 3:12am

8th grade Clinton Junior High School
For your own safety on line, NEVER NEVER give your town/city, name, school, etc. online. Sra
Thursday, November 5, 2009 at 11:53pm

physical science 8th grade
63.546=X*62.9298+ (1-X)64.9278 where X is the decimal precent of Cu63, and 1-x is the decimal percent of Cu65
Wednesday, November 4, 2009 at 5:40pm

8th grade
Do you mean? 1/5 times 1/5 times 1/2? 1/5 * 1/5 * 1/2 = ?
Tuesday, November 3, 2009 at 4:49pm

8th grade History/English
I need to name three influential pilots in Life on the Mississippi by Mark Twain. I already have two: Mr. Brown Mr. Bixby I need one more. Anyone know one?? Thanks!
Sunday, November 1, 2009 at 1:44pm

8th grade
You must be much more specific on what "cleaner" means before you proceed. Discuss this with your parents or teacher, because "cleaner" is not a useful term.
Wednesday, October 28, 2009 at 6:28pm

8th grade
A chemical solution is a mixture of two or more substances. Examples: air, carbonated water, blood plasma, petroleum, sugar water
Monday, October 26, 2009 at 11:33pm

8th grade
a student wo weighs 500 newtons climbed the stairs from the first floor to the third floor 15 meters above in 20 seconds A.how much work did she do? B.what was her power
Sunday, October 25, 2009 at 2:09am

8th grade
Underline the word or enphazied on the word
Friday, October 23, 2009 at 12:38am

8th grade
n+3=12 transposing (-3)to r.h.s n=12-3 n=9
Sunday, October 18, 2009 at 12:40pm

8th grade
Great Britian gradually raised its taxes because #1 they couldnt pay taxes to the king#2price of tea raised
Wednesday, October 14, 2009 at 5:48pm

8th grade
6n-(-2n)+8 6n--2n+8 8n+8 8(n+1) n=-1 I hope this is right.
Monday, October 5, 2009 at 10:30pm

math 8th grade
Create two fractions. 72/100 = ?/200 Then, cross multiply, which is multiplying 200 by 72, then dividing by 100. Then, you'll get your answer.
Monday, October 5, 2009 at 5:44pm

8th grade
Direct Variation: when you have a job that pays an hourly wage, the amount you earn varies directly with the number of hours you work. Suppose you earn $7.10/ hour working at the library.
Saturday, October 3, 2009 at 10:55am

8th grade - science
According to your previous description, the minimal (smallest) unit in the ruler would define the preciseness. You also answered your other two questions in your previous post. Read it again more carefully.
Friday, October 2, 2009 at 5:21pm

8th grade science
Please do not keep posting the same question. If there's something you don't understand about an answer, please be specific about what is you don't understand.
Friday, October 2, 2009 at 2:10pm

8th grade math
2 x 10^4 light years x (5.87 x 10^12 miles/light year) = ??
Wednesday, September 30, 2009 at 12:41pm

8th Grade Math
How do you solve this equations? (xy^-3)^-5 (3x^4)(4x^12) ab^-6 ______ c^0d^-4 x^3y^0(z^-4) Can you please show it step by step? Thanks.
Saturday, September 26, 2009 at 1:08pm

8th Grade Math
x/y=4, means x=4y substitute 4y for x in x-y=9 to get (4y)-y = 9 Can you continue? Note: the third equation (y-x)=-9 can be derived from the second (x-y)=9, so it gives no new information.
Thursday, September 24, 2009 at 9:08pm

Science
Also, I'm pretty sure Aaron's words are correct... they seem to fit. Thanks! Anyway, it is 8th grade physical science and we're learning about the scientific method.
Tuesday, September 22, 2009 at 4:38pm

8th grade history
please tell me a website where i could find the americans technologies that they used back then please and also find me a ebsite on the pictures of old technologies
Friday, September 18, 2009 at 9:10pm

8th grade Math
I assume you mean sqrt (28x) + sqrt(63x) sqrt(7*4x) + sqrt(7*9x) 2sqrt(7x)+ 3sqrt(7x) 5sqrt(7x)
Wednesday, September 16, 2009 at 8:11pm

8th grade Math
Adding Expressions with Square Roots 28x square root + 63x square root
Wednesday, September 16, 2009 at 8:07pm

3rd grade
grade 1 215 grade 2 186 grade 3 259 how many more were sold bt grade 3 than by grade 2? 73 answer why aren't any of the tens regrouped to subtract the ones?
Monday, September 14, 2009 at 4:11pm

8th grade
on a map I need to lacate Mt.Olympus,Mt.Parnassus,Mt.Pindos and Mt.Helicon all on one Mythology map.
Sunday, September 13, 2009 at 9:04pm

social studies
how can social studies affect me iam a 8th grade student
Monday, August 31, 2009 at 8:10pm

8th grade Math
One inch of water in this tank contains 384 cubic inches. 576 / 384 = 1.5 inches
Monday, August 24, 2009 at 1:23pm

8th grade
Fine the complete subject or predicate of the sentence. then identify the simple subject or verb. Examble; The peaks of the undersea mountains rise above the surface of the water and form islands.
Wednesday, August 12, 2009 at 9:13pm

8th grade
n+3=12 12 - 3 _____ 9 n+3=12 CHECK IT! 9+3=12 9 n=9 +3 ___ 12 TADA!!!
Monday, July 27, 2009 at 7:29pm

8th grade
I wanted to welcome you ASAP to our little family here in the States. It's high time we shook hands in person and not just across the sea. I'm pleased as punch about getting to know you all, and I for one will do my level best to sell you on America.
Sunday, July 19, 2009 at 10:44am

8th grade
n+3=12 n=(4) 4x3=12..... simple :)
Wednesday, July 8, 2009 at 12:46pm

8th grade
Write a polynomial expression in simplest form that represents the difference between the area of the larger rectangle and the area of the smaller rectangle. Then find the difference when x=4.
Wednesday, June 3, 2009 at 7:51pm

Math, not "8th grade"
Assistance needed. Please type your subject in the School Subject box. Any other words are likely to delay responses from a teacher who knows that subject well.
Tuesday, May 26, 2009 at 10:11pm

8th grade
can u help me to find the product of -4x^2 and x^3 + 2x^2 - 5x + 3 and the solution to the equation of x^2 + 30x = 1000...I came up with -20 and 50 but i dont think it is right..can u help also can you help me to do the factorization of 6x^2 - 2x - 20.....Help please help
Tuesday, May 26, 2009 at 10:06pm

8th grade
Can you help me find the roots of the polynominal of 5x2 - x....I believe it is 0 and 5... I need help in finding the factorization of x2 - 15x + 56 and can u help me in finding the solutions of the equation x2 + 30x = 1000... I came up with 20 and 50..but i think it is wrong...
Tuesday, May 26, 2009 at 9:51pm

8th grade
okay, i know i can't help you with your problem, but I REALLLLLY need help with mine, could you help? Linear systems, the equations are 4x+3=y and x=y-2 I need the solution, and I'm stuck, PLEASE help me!
Tuesday, May 26, 2009 at 9:50pm

8th grade
What is the degree of -5a2b + 4a2 -2b +5 also I need help in finding the product of x + 5 and 3x -2. also what is the product of -4x2 and x3 + 2x2 -5x + 3....I need the solutions..Thank You for Your help
Tuesday, May 26, 2009 at 9:46pm

8th grade
South Vietnam refused to participate in this election -- and the country waged a civil war for control. For more details, read this site. (Broken Link Removed)
Wednesday, May 13, 2009 at 6:15pm

8th grade
how do you simplify: 3x+6 ---- 3x^2
Monday, May 11, 2009 at 7:39pm

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