# Homework Help: 8th Grade

**8th grade math**

y=1/4x-1 1/2y=x-2 2x+3y=3 3y=5-2x 4x-y=3 4x=y=1 I don't understand this can someone please help me! This is Systems of Equations please work out the problem and explain it how to do it.

*Thursday, February 16, 2012 by Austin*

**8th grade math**

A magazine for teenagers ask its readers to write in with information about how they solve personal problems. describe the population and the sampling method Please help thanks!!

*Thursday, January 12, 2012 by saranghae12*

**math**

i need to learn my multiplication tables at least up to 9 and i have to do it fast because i'm in 8th grade and i don't know what they are. how do i learn them fast??

*Thursday, December 29, 2011 by jordyn*

**math**

i need to learn my multiplication tables at least up to 9 and i have to do it fast because i'm in 8th grade and i don't know what they are. how do i learn them fast??

*Thursday, December 29, 2011 by jordyn*

**8th Grade Math**

Question: a) Write in standard notation: 6.3 X 10 to the ninth power. b) Write in scientific notation: 0.00000047

*Thursday, December 8, 2011 by ...*

**8th grade math**

SUZIE HAD TO WRAP A TRUCK,A CAR, A BUS AND A TRAIN. IN HOW MANY ORDERS CAN SHE WRAP THESE PRESENTS?

*Wednesday, December 7, 2011 by stella*

**8th Grade/Art**

My sister is gradating grade 8th this year and she wants to create her own 8th grade yearbook using a "marble notebook" she doesn't want to use a scrapbook she need cover ideas memorable quotes and funny ideas background ideas (when putting pictures she needs some background ...

*Tuesday, November 8, 2011 by Laruen*

**MATH 8TH GRADE Correction**

Sorry I forgot to give directions for each problem. The lines represent that the numbers are fractions. Thank you. Multiply ã7/ã8 ~ ã24/ã49 = Divide ã45/ã81 = Simplify 7ã3/ã5 =

*Saturday, October 29, 2011 by PLEASE HELP*

**MATH 8TH GRADE**

ã7/ã8 ~ ã24/ã49 = ã45 / ã81 = 7ã3 / ã5 = The lines between the numbers represent the numbers as being fractions.

*Saturday, October 29, 2011 by PLEASE HELP*

**Science (8th grade) PLEASE HELP DUE TOMORROW!!**

What are some living relatives of cyrtolite retrorsus? (a kind of gastropod)

*Tuesday, October 25, 2011 by Samantha*

**Awards**

What kind of awards do they give out @ a 7th grade/8th award ceremony???

*Sunday, October 16, 2011 by Lara*

**Spanish-8th grade**

We're learning direct object pronouns so I had to replace the "sellos" in the first sentence-did I do it correctly? Tú coleccionas sellos. Tú los coleccionas.

*Wednesday, October 12, 2011 by Marissa*

**8TH GRADE MATH**

IF C IS THE NUMBER OF CUPS THEN 1/2C CAN BE USED TO FIND THE NUMBER OF PINTS FOR 12 CUPS

*Monday, October 10, 2011 by NICK C*

**8th grade math**

IF IT TOOK THE RIVERAS 18 HOURS TO DRIVE 760 MILES. WHAT WAS THEIR AVERAGE HOURLY SPEED?

*Thursday, October 6, 2011 by nick c*

**8th grade History**

i have no clue how to write a paragraph about the spanish conquistadors! i need help please

*Friday, September 30, 2011 by JioVona*

**8th grade math**

What is the perimeter of a rectangle with a length of 4 2/3 inches and a width of 3 1/3 inches

*Monday, September 12, 2011 by Anonymous*

**8th grade math**

I need to know how to work this math problem: 3n + (-7) -5n +1

*Friday, September 9, 2011 by david*

**reading**

Could 8th grades books to read? I am more on a college/highschool reading level but i need the appropriateness for an 8th grader. thanks.

*Friday, September 9, 2011 by gail*

**8TH GRADE MATH**

FOR EVERY TWO M & M PACKS YOU BUY YOU GET TWO FREE IF ONE M & M PACK COSTS 79 CENTS HOW MANY CAN YOU BUY FOR 6.00 DOLLARS 6.00 DIVIDED BY .79? ANS 6? OR 3?

*Thursday, September 8, 2011 by Nick C*

**U.S history 8th grade**

who was the founder of roanoke island? that is the last question on my U.S history worksheet!!!!!

*Monday, September 5, 2011 by sammie*

**8th grade Math**

" four less than twice a number is greater than six " Can someone please write that as an expression ?

*Friday, June 10, 2011 by Maria*

**school in general**

Hi i have a question im currently in 7th grade but i was held back a year in first do you think there would be any possible way to advance to 8th grade just curios I believe I have a wide enough knowledge span to pull it off but im just questioning the wheter or not it would ...

*Friday, May 27, 2011 by JESSE*

**8th grade math**

The two boxes are similar rectangular prisms. what is the height of box B. I figured out the volume of the smaller box first now what do I do?

*Wednesday, May 4, 2011 by debbie*

**8th grade math**

Suppose x and y are real numbers such that xy = 9 and x2y + xy2 + x + y = 100. What is the integer value of x2 + y2? (Target Round #6)

*Wednesday, April 13, 2011 by Anonymous*

**math 8th grade**

One of a pentagon's sides is 3 feet longer than the other. If the perimeter of the pentagon is 128m, how long is the longest side?

*Thursday, March 31, 2011 by cody gilliam*

**math 8th grade**

One of a pentagon's sides is 3 feet longer than the other. If the perimeter of the pentagon is 128m, how long is the longest side?

*Thursday, March 31, 2011 by cody gilliam*

**8th grade math**

If two numbers are relatively prime, what is their LCM? Explain your reasoning and give 2 examples supporting your answer.

*Wednesday, March 30, 2011 by HELP*

**8th grade science**

The loudness of sound can be measured in decibels. Do you think loudness is a vector or not? Can you explain why or why not.

*Wednesday, March 23, 2011 by Kallie*

**8th Grade Science**

I have to do a project and I have to have 9 or more physial and chemical properties of colloids and suspensions. I am soo stuck!!! Help!! Thanks!

*Monday, February 28, 2011 by Niki*

**8th Grade Algebra**

If Julie draws a card from a standard deck of well-shuffled playing cards, what is the probability that he draws either an ace or a heart?

*Monday, February 14, 2011 by Elizabeth*

**Math**

Help me please to simplify 8 to 8th power x 8 negative 8th power

*Sunday, February 6, 2011 by Tiffany*

**8th Grade Math**

I have an input output table, but I can't figure out the rule. Input: 1, 2, 5, 7, 10 Output:5, 15,?, ?, ?

*Thursday, January 27, 2011 by Robin*

**8th grade Science**

How do I show work for Si + Cl ?? The answer is SiCl with a little 4 down below the Cl. but I don't know how to show the work.

*Wednesday, January 19, 2011 by Susan*

**8th grade American History**

For my school assignment I am to create a Facebook for George Washington. Anyone have an idea of people I could put in his friends list?

*Saturday, January 8, 2011 by Courtney*

**algebra 1 8th Grade**

Find the constant of variation for the direct variation. F(x)=4.5x

*Thursday, January 6, 2011 by shanequa*

**8th grade science**

Hi! For a research project from my science class I'm having trouble trying to find an answer to the following problem. How does the Man-o-War care for their young? Thanks!

*Wednesday, January 5, 2011 by Lina*

**8th grade science**

HI! I need help with detremining how long my essay should be. It has to be from 4-5 minutes long. Thanks!

*Wednesday, January 5, 2011 by Lina*

**8th grade**

how do i know if all of the points are on the boundary line or they are all below it?

*Thursday, December 16, 2010 by william clemons*

**8th grade science**

A 1 kg ball moving at 3 m/s strikes a 2 kg ball and stops. If the 2kg ball was initially at rest, find its top speed after the collision

*Wednesday, December 1, 2010 by tressie*

**8th grade**

I don't understand constant rate of change can you give me some examples. The graph I have shows the depth of the water in a vase over 8 days

*Wednesday, December 1, 2010 by Abby*

**8th grade**

Tom had scores of 78, 88, 94 and 79 on his first four science tests. What must he score on the next test to have an average of 88?

*Monday, November 29, 2010 by Lisa*

**8th grade**

draw a diagram showing the motion of a satellite around Earth. Draw the force vectors acting on the sattelite. Is the sattelite accelerating?

*Wednesday, November 24, 2010 by jamaila*

**8th grade**

advertising in arecent uear, outdoor advertisements amounted to 2.2% of all advertising dollars spent in the u.s. what fraction is this?

*Sunday, November 21, 2010 by tong*

**8th grade**

At Smart Middle School students are required to take 7 classes each grading period. At the end of each grading period a student is assigned a final grade (A, B, C, D or F) for each class for the grading period. A student’s overall grade point average for the grading period ...

*Monday, November 15, 2010 by Anonymous*

**8th grade math**

Translate the phrase to an algebraic expression. Justin had $31 before spending q dollars on jeans. How much money remains? Thank you

*Sunday, November 14, 2010 by chasity*

**8th grade math**

is this expression correct? Question: translate 14 increased by y to an algebraic expression. my answer: 14 + y

*Sunday, November 14, 2010 by chasity*

**8th grade math**

seeking help. Justin had $31 before spending q dollars on jeans. how much money remains? (translate phrase to an algebraic expression)

*Sunday, November 14, 2010 by chasity*

**8th grade math**

7z-z can someone please check my answer for the above math question. My answer is 62 is this correct?

*Saturday, November 13, 2010 by cindy*

**8th grade Math**

Can you please check my answer? Solve for x. 7- 7/2x = -5 my answer: x = 42

*Saturday, November 13, 2010 by Elizabeth*

**8th grade pre-algebra**

how to use a grid and lenghts of line segments to give a geometric argument

*Thursday, November 11, 2010 by nerdy*

**8th grade**

did anyone read the barcode tattoo by suzanne weyn? if you did, can you help me find 2 hyperboles and the page numbers? the help is greatly appreciated. thank you

*Thursday, November 11, 2010 by dana*

**8th grade math**

Can you please check my answer? Selena received $42 commission for selling a computer for $1400. What percent is her commission? my answer: 3%

*Monday, November 8, 2010 by Elizabeth*

**8th grade**

two children are fighting over a toy pull on it from opposite sides .the result is stand off.explain this term of the net force

*Sunday, November 7, 2010 by juan*

**8th grade**

i have a project in science and i can't seemed to find the explanation of an element's, silver, symbol. Thanks so much!!!!!!!!!!!!!!

*Sunday, November 7, 2010 by Taavon 9*

**8th grade**

5[6-2(5-3>to the zero power)] Please help so confused answer = -20 or 100 idk please help !

*Friday, November 5, 2010 by Lulu*

**8th grade**

A store that personalizes shirts chargers $20 for a shirt plus $.75 for each letter. Write an algebraic expression for the cost os "t" shirts using "n" letter each.

*Friday, November 5, 2010 by jennifer*

**8th grade**

Consider the equation 3x+5y=k, what values could k so that the x-intercept and y- intercept on the equations graph would both be integers. explain.

*Thursday, November 4, 2010 by Monkeylover:)*

**8th grade**

If there were 10 grams of iron and 20 grams of water what would the total amount be?

*Tuesday, November 2, 2010 by Anonymous*

**8th grade math**

What is 25% of $20.00. What is the total cost of the item? I multiplied 20 x .25 and my answer was 5.00 Then I subtracted 5.00 from 20.00 making my final answer $15.00 for the item. Please tell me if this is correct.

*Tuesday, November 2, 2010 by Lane*

**8th grade**

i have a project and its about genres and i would like to know what are five characteristics of realistic fiction? Thanks

*Wednesday, October 27, 2010 by Taavon 8*

**Algebra.**

I'm in 8th grade, im in algebra, and this is my question: x=a+b+c ----- ab solve for a. please help!!

*Monday, October 25, 2010 by Maddison*

**math 8th grade**

I need to combine like terms. Here are a few questions that I am having trouble with. -r - 10r n-4-9 -4+7(1-3m) Please help ! thank you.

*Thursday, October 7, 2010 by Britta*

**8th grade**

I cant Figure this out... Find each Unit Rate: Four pounds of apples cost $1.96 and Sal washed 5 cars in 50 mins

*Monday, October 4, 2010 by May*

**History**

8th Grade History; where is massachusetts bay located? what is the purpose of its discovery? advantage, and disadvantage. relationship with the local indian tribes. and 1 interesting fact. i cant find ANY of this. help?

*Thursday, September 30, 2010 by Cheyenne*

**8th grade**

Math I am a fraction in simplest form. I am greater than1/3 and less than 1/2. The sum of all my digitsb is 8. the difference between my numerator and denominator is 7. What fraction am I?

*Thursday, September 30, 2010 by maria*

**earth**

If the Earth has so much mass, then how does it "float"? (My 8th grade Astronomy class trying to figure this out. -Lauren

*Wednesday, September 29, 2010 by Lauren*

**8th grade**

HOW CAN SOCIAL DEVELOPMENT IMPROVE THE ECONOMIC DEVELOPMENT OF A COUNTRY?

*Tuesday, September 21, 2010 by SANAM*

**8th grade**

write each number as the product of prime factors. (a) 42__________________ (b) 110_________________ (c)...__________________ (d)...__________________ .... ....

*Monday, September 20, 2010 by raluca*

**8th grade**

calculate each power of 10 what pattern do you see in part (a) explain hoe your pattern can show that 10 to the pwoer of 0=1

*Monday, September 20, 2010 by unknown*

**8th grade math**

How do I create a calendar with expressions using letters a,b,c, and d (1,2,3,4). Each expression needs to equal each day on the calendar.

*Sunday, September 19, 2010 by Tee*

**8th grade**

How do I create a calendar with expressions using letters a,b,c, and d (1,2,3,4). Each expression needs to equal each day on the calendar.

*Sunday, September 19, 2010 by Tee*

**8th grade math**

simplify: 3 to fourth power minus square root of sixty-four divide (10-12 squared)

*Sunday, September 19, 2010 by zack*

**8th grade**

how to find common factors and common multiples for prime factorization.

*Thursday, September 16, 2010 by kendra*

**8th grade**

Joe is stacking four cubes on top of each other and painting the outside of the stack. how many sides will be painted, not counting the bottom which is on the ground.

*Wednesday, September 15, 2010 by Sarah*

**8th grade math**

The perimeter of a square with a side length of s is given by the expression 4s, what is the permiter of the square shown? and on one of the sides it says 7.5m How would I answer this?

*Thursday, September 9, 2010 by Allyson*

**8th grade**

which of the following is an irrational number? A. 1 B. 9/17 C. 0.4166666666 D. Both A&C with showing work please or putting it in to words.

*Tuesday, August 31, 2010 by sherkyra*

**8th grade math**

i need help NOW: A leather coat costs a fashion store $150. THey will sell it for a 70% profit. Find the profit as a percentage of the selling price.

*Wednesday, August 25, 2010 by charlotte*

**8th grade**

4x plus 2yplus7x plus 3 is if x is 3 a ndy is 4

*Tuesday, August 24, 2010 by Anonymous*

**8th grade**

define these terms or questions: what is an inital observation? what is an independent variable? what is an dependent variable? what is a control group?

*Tuesday, August 24, 2010 by brxce*

**8th grade**

was pope gregory VII trying to purify the church form corrupt bishops or tryingto increase his own power ?

*Tuesday, August 24, 2010 by Bob lee*

**8th grade**

5x=125 to the 6th power over 25 to the 4th power

*Wednesday, August 11, 2010 by Anonymous*

**math**

what does term "factor each expression" mean in 8th grade math?

*Wednesday, June 30, 2010 by girly t.*

**8th grade Composition**

Identify parts of Speech for sentence below, on numbered word: 1 2 3 Before the eruption, Mount St.Helena was 4 like a giant pressure cooker.

*Tuesday, May 25, 2010 by Matthew*

**8th grade algebra**

need ideas of personal experiences to create a mathematical story problem using 4 pictures of this experience and solve the problem.

*Wednesday, May 5, 2010 by Raylen*

**8th grade algebra**

need ideas of personal experiences to create a mathematical story problem using 4 pictures of this experience and solve the problem.

*Wednesday, May 5, 2010 by Raylen*

**Math**

what page in the 8th grade texas math book is the let,if,then problems.

*Wednesday, May 5, 2010 by Dude really*

**8th grade**

what is a historical fact about independent and dependent events. im having so much trouble finding this answer on the enternet. HELP! thanks

*Wednesday, May 5, 2010 by Dylan*

**8th grade**

what it he reason a spoon gets hot when put in a bowl of hot soup?

*Friday, April 30, 2010 by Chris*

**8th grade history**

Why did British colonies in north america put aside their differences to make Canada?

*Sunday, April 18, 2010 by Amy*

**8th grade physics**

1. if you double the distance over which a force moves an object,the work will be multiplied by?? 2.if emily doubles her velocity.her kinetic energy will be? 3.the unit joule is equivalent to?

*Friday, April 16, 2010 by Jana*

**science, 7th,6th,8th,9th grade**

In what three ways can machines make work easier?

*Thursday, April 15, 2010 by Nyla Rose*

**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**

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 by shellie*

**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*

**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 by Ann*

**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 by Bobby*

**8th grade science**

What is a vertical section of the ocean from it's surface to the ocean floor called?

*Thursday, February 4, 2010 by Sandy*

**8th grade**

why do states need to be concerned about laws passed in other states

*Thursday, February 4, 2010 by maria*

**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**

in the formula for lateral surface area for a square base pyramid is 1/2Pl but what does the little l mean?

*Tuesday, January 26, 2010 by askdljf*