Tuesday
July 28, 2015

Homework Help: 8th Grade

8th grade
Is -7*10^11 in scientific notation? If not, write it in scientific notation.
Wednesday, April 28, 2010 by Logan

8th grade Physics
Explain whether the photons emitted by a bright light bulb are more energetic than those emitted by a dim light bulb of the same color. How does the color of the light bulbs determine the amount of energy of the electromagnetic waves?
Tuesday, April 27, 2010 by Renee

Math distance rate 8th grade test tmr!
Two planes left Seattle at the same time, both traveling due east. One had the rate of 185 mi/h and the other had a rate of 225 mi/hr. After how many hours were they 220 miles apart?
Wednesday, March 24, 2010 by sky

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 by sam

8th grade
What would be the right way to convert base 16 to base 10, such as for an example, 1BD base 16 to base 10?
Sunday, March 21, 2010 by Khyir

8th grade science
A glass of water is placed on a very sensitive scale and several antacids tablets are dropped into the water. The weight of the glass and its contents is less after the tablets dissolve than before the tablets dissolved. Tell how matter is conserved ? Please help! I couldn'...
Tuesday, March 16, 2010 by Michaela

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 by Austin

Math - average grade
Does anyone know how to calculate average point grade? I have the following data: grade D - 2 students - 4,9 percent grade C - 6 students - 14,7 percent grade B - 12 students - 29,2 percent grade A - 21 students - 51,2 percent What is the average grade? This is NOT my homework...
Wednesday, February 17, 2010 by refy

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 by Outcast

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 by mike

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 by val

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 by Celeste

8th grade
a rabbit can climb one or two steps at a time on a ten step staircase, but he never goes back down. In how many different ways can the rabbit climb a flight of ten steps
Tuesday, January 26, 2010 by rob

8TH GRADE MATH
thank you so much, ms sue! may i ask another question? If 6 oz cost 3.25 20 oz cost 5.59 36 cost 6.59 how much would 12oz, 26 oz, 48 oz cost? Thank you so much! maribeth
Sunday, January 24, 2010 by maribeth

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 by maribeth

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 by renee

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 by Mary

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 by Rose

8th grade science
What law states that unlike charges attract each other while like charges repel each other?
Thursday, December 17, 2009 by Karen

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 by Sammi

8th grade history
Name three reasons people left England to come and colonize the New World. They wanted riches, land, and place to start a new life. What happened to the people of Roanoke? They disappeared, and no one knows why or where they went. Are my answers right? I'm not very good at...
Sunday, December 13, 2009 by Sammi

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 by Zach

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 by LORI

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 by Jay

8th grade
I know the answer but how do i get my starting line ? Vancover recivers 3 times the amount of snow as toyko does together they recive 80 cm i can see that vancover will be 60 cm and toyko 20 cm but i do not know how to do it weird eh ?
Tuesday, December 1, 2009 by Scott

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 by Nick

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 by Nick

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 by Dorthea

11th grade
The students of litchfield High school are in grades 9,10,11,12. Of the students , 1/4th are in 9th grade, 1/3rd are in 10th grade, 1/6th is in 11th grade and there are 300 in the 12th grade, how many students are there all together?
Friday, November 6, 2009 by stefanie coplin

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 by Owen Leigh

8th grade math
Fill in the blanks using 3 of these operation signs to complete each number sentence. * + - / (* means multiply) question 1: 12 ___6 ___4 ___ 2=24 question 2: (12 ___ 6) __ (4 ___ 2)=36
Wednesday, October 21, 2009 by Sarah

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 by Peter

8th grade - science
i have the same problem as before,only 3 more questions about it. please help!! how precise is the ruler originally used to measure the string? explain. what is the length of the string to the nearest centimeter? what is the length of the string to the nearest tenth of a ...
Friday, October 2, 2009 by Michaela

8th grade
A JetBlue flight from Jacksonville, FL to San Diego is flying at 500 km per hour west. It encounters a head wind that is moving at 300 km per hour in an easterly direction towards the east. What is the net velocity of the plane, include directions?
Wednesday, September 23, 2009 by enrique

8th grade Math
Adding Expressions with Square Roots 28x square root + 63x square root
Wednesday, September 16, 2009 by Tim

social studies
how can social studies affect me iam a 8th grade student
Monday, August 31, 2009 by neslen

8th grade Math
A fish tank 24 inches long, 16 inches wide, and 12 inches high is 3/4 full of water. By how many inches will the water level rise if you should add 576 cubic inches of water?
Monday, August 24, 2009 by Nicki

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 by keimon

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 by Bernice Smith

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 by Julia

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 by Jay10

math 8th grade
im stuck on a question and i dont kno wat the answer shud b... Is the square root of 8 + the square root of 10 the same as the square root of 8+10? Use a grid and lengths of line segments to give a geometric argument. thx for ur help ;]
Monday, May 18, 2009 by Meherin

Algebra 1: 8th Grade
Simplify each expression. Write your answers using positive exponents. Check Answers Please: 1) 2^3*2^4 = 2^7 2)10^6/10^9 = 1/10^3 3)3^5*3^1 = 3^6 4)5^7*5^-4 = 5^3 5)9^3/9^-10 = 9^13 6) 4^11/4^8*4^-2 = 4^5 7) a^2*a^3 = a^5 8)b^-9/b^4 = 1/b^13 9)c^-5*c^-2 = 1/c^7 11)(5d^4)(8d^6...
Tuesday, April 28, 2009 by Joy

8th Grade Algebra
1) A firefighter aims a hose at a window 25 ft. above the ground. The equation h = -0.01d^2 + 1.06d + 5 models the path of the water, when h equals height in feet. Estimate, to the nearest foot, the horizontal distance d in feet btween the firefighter and the building. This ...
Monday, March 30, 2009 by Nancy

8th Grade Algebra
For a graph of the equation y = x^2 + bx + c, the x-coordinate of the vertex is a function of b. Write an equation for the function.
Saturday, March 28, 2009 by Joy

Systems of Inequalities-8th Grade Algebra
Graph the equation. The graph will divide the coordinate plane into four reqions. Write a system of inequalities that describe each region. Labe the region with these inequalities. 1) y = x - 3 y = 9 - x I already graphed it, I only need help on writing the systems of ...
Thursday, March 12, 2009 by Marta

8th grade history
I'm writing a research report on the very first stagecoaches. The information that I cannot find is: Who invented it who has improved it over the years how and where was it originally used If not used today, why is it not used, and what replaced it? Thank you SOOOOOO much ...
Sunday, March 8, 2009 by Coco

8th grade science
an object that weighs 3N displaces 90mL of water which weighs 2.8N. What is the buoyant force on the object? idk how to solve this problem PLEASE HELP!! thanks
Wednesday, February 18, 2009 by brianna

8th Grade History
I am doing a poster on John Quincy Adams and the background needs to consist of something that describes something important in the president's lifetime. I would like to know any interesting or funny facts on John Quincy Adams. Thank you sooooo much for any help that i can...
Tuesday, February 17, 2009 by Nicole C.

8th Grade Algebra: Answer Check #2
Add or Subtract (Radicals) { this means squared 1.3{2 + 4{2 Answer: 7{2 2. 8{3 + 3{3 Answer: 11{3 3. 7{5 - 3{5 Answer: 4{5 4. 8{2 - 5{2 Answer: 3{2 5. 6{x + 7{x Answer: 13{x 6. 9{y + 3{y Answer: 12{y Multiply 7. -3x^2(4x^2-3x-5) Answer: 12x^2 8.(3b+5)(b-3) Answer: 3b^2-4b-15 9...
Tuesday, January 20, 2009 by Joy

8th Grade Algebra: Radicals
Find each product. { this means the square root sign. 1. (3+2{20)(5+3{45) 2. The length and width of the rectangle are x-5 and 2x-6 a. Write a trinomial that represents that area of the rectangle. b. What is the smallest integer value of x that will give positive values for ...
Monday, January 19, 2009 by Joy

8th Grade Algebra
Find each product. { this means the square root sign. 1. (3+2{20)(5+3{45) 2. The length and width of the rectangle are x-5 and 2x-6 a. Write a trinomial that represents that area of the rectangle. b. What is the smallest integer value of x that will give positive values for ...
Monday, January 19, 2009 by Joy

8th Grade Algebra-Answer Check
Write each decimal as a fraction in lowest terms. 1. 0.111... Answer: 1/9 2. 0.02 Answer: 1/50 3. 0.7272... Answer: 8/11 4. 0.012012... Answer: 4/333 ?? 5. 0.66666.... Answer: 2/3 6. 0.396 (reapeating sign over all numbers) Answer: 44/111 ??? If I got any of these wrong, can ...
Monday, January 19, 2009 by Joy

8th Grade Math
Can someone please help me with the following problems? I do not have the formula for finding the slope of a line. These are not homework they are for a portfolio. Find the slope of each of the following lines. 1. y=-5-17 2. 10 + y = x 3. y = -2x - 5 4. 4x + y = 0 5. 3x - 4y...
Thursday, January 15, 2009 by Rusty

Math 8th grade
A pen contained chickens and pigs. There were 28 legs and 9 heads. How many chickens were in the pen? I think the answers in 4. Is that right?
Thursday, January 15, 2009 by Rosalie

Science (atoms) 8th grade
Chlorine has an average atomic mass of 35.45 amu. The 2 naturally occurring isotopes of chlorine are chlorine-35 and chlorine-37. Why does this indicate that most chlorine atoms contain 18 neutrons?
Thursday, January 15, 2009 by Twilight lover

8th Grade Algebra:Radicals
{ this means means square root How do you solve these kind of radicals: 1. (5-{14)*(3-{2) 2. (4{2+2)*(3{3-1) Can someone show me how to do these correctly please ?
Wednesday, January 14, 2009 by Joy

8th grade
i have a homework assignment i do not know how to do. i was out sick so i have not learned this. hear is the question......y varies directly as x. find the constant of variation and write an equation for the direct variation. question 1: y=15 when x=5
Wednesday, January 14, 2009 by gavyn

8th grade
Find the equation of the line With a slope of (-1/3) that goes through the point (2, -4) With a slope of 3 that goes through the point (-5, -1)
Wednesday, January 14, 2009 by kate

8th Grade Algebra-Radicals:Answer Check
Write each expression in simplest form. ( means square root 4. 3(11 + 4(11 Answer: 8(11 7. 7(2 - 2(8 Answer: 1(2 ?? 8. (48 + (75 Answer: 9(3 9.(3(10) Answer: 19 + 6ã10 10. (27/64 (Fractions) Answer: 3(3/8 ?? 11. 10(20 - 3(80 ...
Wednesday, January 14, 2009 by Joy

8th Grade Algebra-Radicals:Answer Check
Change each decimal to a fraction in lowest terms. 1) 0.4242.... Answer: 14/33 2)0.58 Answer: 29/50 3)0.14 (Repeating sign over both numbers) Answer: 14/99 Write each expression in simplest form. ( means that it is inside a square root. 1. (54 Answer: 3(6 2. (98 Answer:(14*(7 ...
Tuesday, January 13, 2009 by Joy

8th grade math
the ? says "the apatosaurus dinosaur averaged 70 ft. in length. This is 2800% of the avearage length of a Compsognathus dinosaur. what was the average length of the Compsognathus?(if necessary round to the nearest hundreth") i think its proportion. {part over whole...
Tuesday, January 13, 2009 by brianna

8th grade
hi everyday my teacher gives us a paragraph to fix: grammer ,spelling,commas,ex.and i always fail.I don't understand how fix a paragraph or my rough drafts can you help me !!!!
Thursday, January 8, 2009 by jodi

8th grade math
The radius of circle M is 3 times the radius of circle P. If the area of circle P is abotu 27 sq. cm. the area of circle M is about what? (Use 3 as pie) i dont get it. is the scale ratio 3:1?
Monday, January 5, 2009 by brianna

8th grade
Surface ocean currents located at 40 degrees south latitude and 90 degrees west latitude generally flow toward the (1) northeast (2) southeast (3) southwest (4) west
Saturday, December 27, 2008 by Angie

8th grade math
Sue whants to by a new printer that costs $189.She has $125 saved.She has a job that pays $8.00 an hour.How many hours must she work to earn enough to buy the printer?
Saturday, December 13, 2008 by Alyssa

8th grade
what does "new moon" have to do with the book new moon
Thursday, December 11, 2008 by k

8th grade math problem
buck said "gee whiz, there must be between 10 and 20 animals in the yard!" "yes" said chuck. "there is one more cat than there are dogs, and there is one more squirrelthan there are cats." What are the greatest possible number of dogs in the yard...
Thursday, December 11, 2008 by Lauren<33

Math 8th grade
A bank loans a customer $35,000 for a period of 8 yrs. The simple interest rate of the loan is 10.7%.What is the total amount that the customer will need to pay the bank over the 8 yrs.
Monday, December 8, 2008 by Alyssa

8th grade tech
I need to find out what a Information Colour chart is. I've checked on internet but I can't find. Could anyone help me I need 3-5 facts about it to. Thank you.
Monday, December 8, 2008 by Lee

8th Grade Algebra
Draw two squares of appropriate size to compare the areas of Alaska (591,004 miles squared) and Texas (266,807 miles squared). * I don't get how to set up and do this problem.
Tuesday, December 2, 2008 by Joy

8th Grade
If you purchased a new house and wanted new carpet and new furniture, you would probably get these items from the states of which two competing teams? ______________vs._______________
Thursday, November 20, 2008 by miriam

8th grade
A game between two of the competing teams from bordering states might well be called the "Kudzu Klash". The game between which teams would deserve this title?
Wednesday, November 19, 2008 by miriam

8th grade physical sience
what is the charge on carbonate ion? Compared to the number of protons, how many electrons does the carbonate ion have?
Monday, November 17, 2008 by Taylor

8th Grade Algebra1
I don't understand this question, so if anyone can answer it, that would be great! We are doing motion problems, so as you probably know, the formula is d=rt. (distance equals rate times time.) We have to make a chart to answer the following question... A roller coaster ...
Friday, November 7, 2008 by Nicole C.

8th grade pigskin georgraphy
Determine which state capital will be visited bty a team form a state capital.
Friday, October 31, 2008 by Anonymous

math 8th grade
the volume of a box needs to be 500 cubic cm. if the bas has dim of 12.5 cm and 5 cm how high must the box be? I got 8 cm. Is this right? My work is 12.5/500=40 5/40=8 8 cm
Tuesday, October 14, 2008 by tito

Algebra 1: 8th Grade
Explain why the graph of an equation in the form y=kx always goes through the origin. Give an example of a graph that shows direct variation and one that does not show direct variation. I don't really get the question.
Tuesday, October 7, 2008 by Joy

8th grade
Dear Sir, I have question related to Acids and Alkalis is that;- You are given a colourless solution.Describe three tests you would carry out to determine the solution is an acid or an alkali without tasting or using indicators. Please reply me quikly
Friday, September 26, 2008 by Fatima

8th grade Maths
The product of three consecutive integers is -1716. What is the greatest of the three integers?
Sunday, September 21, 2008 by seera

8th grade math.
He ripped a piece of paper into three parts, and tore each of those parts into three more parts. if he repeated this action 12 times, how many pieces of paper would he have?
Monday, September 8, 2008 by sam

8th Grade Algebra...HELP!
Where do I add parentheses to make this expression equal a 1 when it is simplified? Expression: 6 + 9 / 3 - 2 When this expression is simplified w/o any parentheses, it equals 7. I just need to know where to put the parentheses so that it will equal 1. And we have to use the ...
Thursday, September 4, 2008 by Joy

8th grade
I need to find the percent of the total area of New York City that each borough covers. Bronx 41miles Manhattan 23 miles Queens 110 miles Brooklyn 73 miles Staten Island 56 miles Not sure how to figure it?
Wednesday, August 27, 2008 by Andrea

8th grade
if 20 of 100 squares on a grid are shades blue, what percent of the squares are blue
Monday, August 25, 2008 by courtney

Science 8th grade
A 73 year old woman suffers a severe cerebral hemorrhageafter a minoe trauma. Blood work reveals that her clotting ablity is imparied. Disease of which abdominal organ may contriute to this ? My answer is the spleen
Wednesday, April 2, 2008 by Anonymous

Science 8th grade check answer
Anterior to the sternum, medial to the thoracic vertebrae ad superior to the diaphragm is the correct location of the heart True or False I am not sure not this on I am going to say False
Thursday, March 27, 2008 by Anonymous

Health 8th grade
Please check my answer thansks :) Invasive sampling of the blood from the _______ would reval that the blood is mostly dexygenated My answer is pulmonary arteries
Tuesday, March 25, 2008 by Anonymous

Science 8th grade
Please check my answer thanks What's the potential benefit of administering CPR to a person whose heart has stopped beating? A. Prevent blood clots B Prevent permanent brain damage C Prevent pericardial effusion D Prevent heart failure I picked D
Tuesday, March 25, 2008 by Anonymous

Science 8th grade
Please check my answer thanks What makes up most of the volume of blod plasma ? A Reb blood cells B Water C Plasma proteins D White blood cells I think it's Red blood cells
Tuesday, March 25, 2008 by Anonymous

Science 8th grade
Please check my answer thanks A woman who recently came home from a tropical vaction now has abdominal pain and diarrhea// Her blod test show an elevated eosinophil level. Which of the following organisms is most likely the cause of her illness? A Bacteria B Worm C Virus D ...
Tuesday, March 25, 2008 by Anonymous

Science 8th grade
Please check my answer thanks Which of the folowing process is achieved through osmosis ? A. A cube of sugar didilving in coffee B. Particles of oxygen filling the lungs C. Water moving across thr cell membranne D. Transport of proteins from the endoplasmic reticulum to the ...
Saturday, March 22, 2008 by Alley

letter
Dear Mr. Donahue, How are you? My name is Nana Turay and I am an 8th grade student. I am writing you this latter because I was wondering if we could have a school dance by the end of the school year. I know we good student are making life tough for you never less we still love...
Sunday, March 16, 2008 by Dj

Science
What is a good science project to do? I am in 8th grade and am studying earth science. I need to present the project in front of class. Im really nervouse.
Sunday, January 27, 2008 by Katy

spanish
Spanish 1B - I am an honor student but with spanish for me I can memorize for the tests but I am not really undestanding it. I am great in science and math - and i got an A barely in spanish but it gets harder. The hardest part for me is that every other class comes easy. I ...
Tuesday, October 23, 2007 by sam

Language Arts
I am in a verse chior group for oral language and I need an oral language peice that is up to 8th grade reading level. Any ideas?
Monday, October 15, 2007 by NIKKI

8th grade spanish
I have to do a cross-word puzzle, but I'm not sure about the answer to one of them. It is a 9 letter word (in Spanish), and fits into this sentence: Donde _____ (tu)esos sueteres nuevos? Plese help!
Monday, October 15, 2007 by pinkpolkadots7

science
is salad dressing - homogenous or heterogenous if it is homogenous is it solution or colloids 8th grade science " just says salad dressing"
Friday, October 5, 2007 by liz

English
I have to chose 20 books + to read this year. If any, what books would you recommend??? I am in 8th grade, but can read adult novels, such as To Kill a Mockingbird (read it) and Moby Dick
Tuesday, September 11, 2007 by Anonymous

math
suppose you bought some 32 cents stamps and some 20 cents stamps. you spent $3.92 for 16 stamps. how many of each stamp did you buy? i got the equation--.32x + .20y = $3.92 but don't know how to solve for x and y what class/level is this for 8th grade math
Thursday, February 1, 2007 by norman

8th grade algebra
ten over eight = what over ten????? please help me!!!!!!!!!! 10 / 8 = x / 10 This means that 8 * x = 10 * 10 Solve for x.
Thursday, February 1, 2007 by jess

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