Wednesday
September 2, 2015

Homework Help: 8th Grade

8th grade math
You are making a box out of an 11in by 8in piece of poster board by cutting congruent squares out of the four corners and folding up the edges. To the nearest inch, what size square should you use to maximize the volume?
Tuesday, April 10, 2012 by Piggy

8th grade math
Two towers are similar. The area of the larger tower is 400 pi ft^2 and the area of the smaller tower is 169 pi ft^2. What is the ratio of the heights of the towers?
Tuesday, April 10, 2012 by Piggy

8th grade math
If the formula D(x,y) = (.7x,.7y) is applied to pre-image point (5, -7), what is the image point?
Tuesday, April 10, 2012 by Piggy

8th grade math
A quiz had only 3-point questions and four-point questions. The best possible score is 100, and there are 29 questions. How many 4-point questions are there?
Tuesday, April 3, 2012 by Anonymous

Science 7R - The Human Body Prep Test
I have a test tommrrow on the The Human Body and I asked my science teacher if she can post a castle learning assignment about the Human Body (the day before the test she always post a caslte learning assignment for us to study and do well on the test the next day) and then ...
Monday, April 2, 2012 by Laruen

Ms.Sue (ONLY)
can you plz help me in science? PLZ HELP ME! YOU HELP ALL THE TIME! *begs* plz help! i am my knees!!!!! (really i am!) its called "science 8th grade"
Wednesday, March 7, 2012 by sammie doodles :-)

science 8th grade
ok, i don't have answer to these questions! #8: The interaction of air, water, and _________ causes weather. #9: Violent storms generally form where? #10:clouds form as warm air rises, expands, cools, and becomes saturated, and then _______________ condense(s) into tiny ...
Wednesday, March 7, 2012 by sammie doodles :-)

8th grade math
how do you make an equation that is parallel to another equation? how do you make an equation that is perpendicular to another equation? please help and explain. Thank you.
Sunday, March 4, 2012 by saranghae12

8th grade math
How do you turn these equation into a standard form? this is the standard form: ax+by=c here are the following equations: 2x = y + 1/2 y - 2 = 1/4x + 1 3y + 3 = 6x - 15 Please help and explain. Thank you.
Sunday, March 4, 2012 by saranghae12

8th grade math
please help me write an inequality for this paragraph. Brandon and Rayna have $40 to spent at the concert and would like to purchase some souvenir programs for friends who cannot attend. They are able to buy pr0grams at $8 each, but want to keep $10 for food. How many programs...
Tuesday, February 28, 2012 by saranghae12

8th grade math
At Maryland Middle School, there are 9 mathematics classes. If two mathematics classes are selected for a school competition, what is the number of possible outcomes?
Tuesday, February 21, 2012 by Piggy

8th grade math
George has a bag of marbles. Inside the bag are 5 red marbles, 3 green marbles, and 2 blue marbles. He draws out two marbles in a row, without replacement. What is the number of outcomes?
Tuesday, February 21, 2012 by Piggy

Math Lit
In a school there are 122 grade 8s, 105 grade 9s, 134 grade 10s, 109 grade 11s, 90 grade 12s. Express Each Class as a percentage of the whole school.
Sunday, February 5, 2012 by Thabo

8th grade math
1. The area shown below will be used for the elementary school playground. What is this area? How much fencing is needed to enclose the playground? Use 3.14 for the value of pi. d= 4 yds for the half circle, w=10 yds. for width of rectangle, and length = 4 yds. and 3 yds for ...
Tuesday, January 31, 2012 by Anonymous

math
Kelly opened a savings account with $500 she received at 8th grade graduation four years ago. The account pays 2.5 percent compounded daily. How much should be in the account now?
Wednesday, January 25, 2012 by help

8th grade physical science
What is the kinetic energy of a 1 kilogeram ball is thrown into the air with a velocity of 30m/sec? How much potential energy does the ball have when it reaches the top of its ascent? How high into the air did the nall travel? Please help me help my child with her homework?
Thursday, January 19, 2012 by Misty

8th Grade Science
A runner whose initial speed is 29 km/hr increases her speed to 31 km/hr in order to win a race. If the runner takes 0.5 seconds to complete this increase in speed, what is her acceleration? I think it's either 1440 km/hr/hr or 0.4 km/hr/sec. Are you supposed to convert ...
Tuesday, January 10, 2012 by Anya

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
The total number of interior angles in two regular polygons is 17, and the total number of diagonals is 53. How many sides does each polygon have? Show work and explain.
Sunday, December 18, 2011 by Anonymous

8th grade math
A fish tank weighs 80 pounds when 40% full of water, and it weighs 140 pounds when completely full. How many pounds does the tank weigh when empty?
Wednesday, December 7, 2011 by Anonymous

8th grade math
if a person is 6 feet tall and casts a 9 foot shadow, how tall would the shadow of a 100 foot tall tree be?
Sunday, December 4, 2011 by liz

My Awards (to share with teachers)
1st Grade participation in summer reading and math program ------ 3rd Grade 2nd place in primary spelling bee Certificate of Achievement: Math, Music, Good Citizenship, Student of the month - June (4 awards) ---- 4th Grade Parp Ribbin Headliners Science Fair (scientific ...
Saturday, November 19, 2011 by Laruen

8th grade math
It takes Bob five minutes to saw a board into three pieces. How long would it take him to saw a board into nine pieces? HINT: The answer is NOT fifteen minutes.
Wednesday, November 9, 2011 by Anonymous

8th grade Math
Bob is reading a 300-page book. After one hour, he had finished 8% of the book. Assuming that he reads at a constant rate, how many more hours will it take him to read the rest of the book?
Friday, October 28, 2011 by Anonymous

High School
Will high school will look at my middle school grades (or just 8th grade grades ?) ????
Thursday, October 20, 2011 by Laruen

8th grade math
Give an example of a linear situation with a rate of a change that is i. positive ii. zero(no change) iii. negative write an equation that represents each situation in the part above. I don't get this so please help! Thank you!
Thursday, October 13, 2011 by saranghae12

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 MY ANSWER 1(1/2C) X 12= (1X.5)X12 .5X 12=6 ANS 6 PINTS IS THIS THE RIGHT WAY TO WORD THIS PROBLEM
Monday, October 10, 2011 by NICK C

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

science 8th grade
I have toy with the density of 2.o g/cm3 ,I put it into tub with water density of 2.0 g/cm3 will the toy float or sink?
Thursday, September 22, 2011 by J.a.y.

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

social studies
i need help with a U.S history question, how would i describe Roanoke? its an 8th grade U.S history question i need it FAST!!!
Monday, September 5, 2011 by sam

8th grade math
A 20 ounce bag of popcorn costs $2.80 at the movie theater, if the unit price remains the same, how much would a 35 ounce bag cost ? Please help me, I'm in math class and Im stuck.
Friday, June 10, 2011 by Kelly

Spanish 8th grade-Could someone please check this
Mexico DF is the word for Mexico City in Spanish I think that is false because they either say Mexico or el DF referring to Districto Federal, correct? They never say Mexico DF do they?
Monday, May 23, 2011 by Rita Z.

Spanish-8th grade
Could you check thee for me? Thank you 1. Say that you plan on going to the movies tomorrow night. Yo pienso ir a el cine mañana por la noche. 2. Say that you need to learn Spanish. Tengo que aprender español.
Monday, May 16, 2011 by Christian

8th grade algebra: radicals
please help me solve these 1. 2√5/8 + 4√3/8 - 1/2√68 2. √4k-5 +1=8 (the radical sign goes over 4k-5) 3. (x+4)*2 /3 =8 4. Write the value of the discriminant of each equation. Then use it to decide how many different real-number roots the equation has. x...
Friday, May 6, 2011 by jenna

Spanish 8th grade-Please check answer
Is this correct the way I answered this-I don't like onion cake so I'm telling them Sorry,but I don't like it. ¿Quieres comer pastel de cebollas conmigo? Lo siento pero no, no me gusta pastel de cebollas. Thank you
Tuesday, April 12, 2011 by Melissa

Spanish 8th grade
I have to write a sentence saying that I feel like doing some activity say playing baseball of football-it doesn't matter. We are suppose to use the tener form so I'm really confused. Thanks for helping. I thought it would Me gustaria(accent over i) jugar whatever but ...
Tuesday, April 5, 2011 by Ellie

8th grade math
The denominator of a fraction is 4 more than the numerator. If both the denominator and the numerator are increased by 1, the resulting fraction equals ½. What is the original fraction?
Wednesday, March 30, 2011 by HELP

Spanish-8th Grade-Please check
I have a question about the owrd cubiertos in Spanish. Does ths word include la servillete el cuchillo el vaso la cuchara el tendor OR is it just like the plate and spoon, fork, knife and NOT the vaso or servillete(napkin)? The word and transaltion is confusing me Thank you
Tuesday, March 8, 2011 by Rachel

Geometry-8th grade
In circle O, chords AB and CD are congruent. Ab measures 2x + y, while CD measures 16.5 Two other chords are congruent. GH equals x +2y and KL equals 13.5 I set them up like this 2x + y = 16.5 x+2y = 13.5 then I substituted-rewrote it x = 13.5-2y Then substituted 2(13.5) + y...
Monday, March 7, 2011 by Anna

Geometry-8th grade
In circle O, chords AB and CD are congruent. Ab measures 2x + y, while CD measures 16.5 Two other chords are congruent. GH equals x +2y and KL equals 13.5 I set them up like this 2x + y = 16.5 x+2y = 13.5 then I substituted-rewrote it x = 13.5-2y Then substituted 2(13.5) + y...
Monday, March 7, 2011 by Anna

8th grade math
the first side of a triangle measures 3 cm longer then the second side the third side is 4cm shorter then twice the second side the perimeter is 31cm. how long is each side?
Monday, March 7, 2011 by Evan

U.S.History- 8th grade
Could someone help me with this question? Which of the following groups of workers lived in poverty? nurses unskilled workes technicians immigrants I'm torn between unskilled workers and immigrants
Thursday, March 3, 2011 by Rachel

8th grade science
answer yes or no to weight, velocity,speed,& mass. 2 identical planes taveling @ 300 km/hr in opposite directions both have the same: weight-yes, velocity-no, speed-yes, mass-yes. velocity is a no, correct?
Sunday, February 20, 2011 by Roy S.

8th grade science
Why can high blood viscosity have negative effects? Also, name the medical condition that people can develop with high blood viscosity.
Thursday, February 17, 2011 by stacy

8th grade science
On one of my tests they are asking me if Symboin pandora has a symbotic reletionshio with the Norway Lobster. In my lesson the answer is yes but with the NORWEIGAN lobster. Is this a typo or are the two lobsters the same lobster but with different names? I am soooo.... ...
Monday, February 7, 2011 by Erica

Math
Help me please to simplify 8 to 8th power x 8 negative 8th power
Sunday, February 6, 2011 by Tiffany

math
The question that have is to simplify and write the answer in exponential notation using positive exponents 2 to 4th power x 2 -2 These are my choices a 4 to the 8th power b 2 to the 8th power c 4 to the 2nd power d 2 to the 2nd power
Saturday, February 5, 2011 by Jimmy

8th grade science
I need help figuring out this on a food web. It goes from a flower to a butterfly to a frog to the bird to a coyote. Now I have to label them. I got them all however i do not know what the frog and bird is. HELP!! :-)
Tuesday, February 1, 2011 by Lina

8th grade science
Can a secondary consumer be eaten by another secondary consumer? Thanks! :-)
Tuesday, February 1, 2011 by Lina

8th grade Algebra
Marianna's rectangular garden is 15 yards long and 10 yards wide. She wants to stretch a wire for hanging lights from one corner of the garden to the opposite. About how long should the wire be?
Monday, January 31, 2011 by Elizabeth

8th grade Algebra
Sharon and her camping group hiked 6 miles due north, stopped for lunch, and then hiked 8 miles due west, stopping at ther campsite for the night. What is the straight line distance from their original starting place to the campsite?
Sunday, January 30, 2011 by Elizabeth

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

math
Ok, the problem says: a Middle school has 125 6th graders, 150 7th graders, and 100 8th graders. Which statement is NOT true? a. the ratio of 6th graders to 7th graders is 5 to 6. b. the ratio of 8th graders to 7th graders is 3:2. c. the ratio of 6th graders to students in all...
Tuesday, January 18, 2011 by panda

8th grade Math
Hi I need help with my math problem. It is: Name the function rule from the table given. Table- X= Y= -4 4 -2 2 0 0 answers: y = -x y = -4 y = 2x y = x I do not get how to solve this problem!
Thursday, January 13, 2011 by Lina

8th Grade Chemestry
Helping my child study. Are there any online guides that can help me teach how to predict the products of a reaction. i.e. _ Ag(NO3)+ _ CaCl2 yields Really want to be able to teach my child how to do this rather than have the answer. Thanks
Sunday, January 9, 2011 by Stephen

8th Grade Chemestry
Helping my child study. Are there any online guides that can help me teach how to predict the products of a reaction. i.e. _ Ag(NO3)+ _ CaCl2 yields Really want to be able to teach my child how to do this rather than have the answer. Thanks
Sunday, January 9, 2011 by Stephen

8th Grade Chemestry
Helping my child study. Are there any online guides that can help me teach how to predict the products of a reaction. i.e. _ Ag(NO3)+ _ CaCl2 yields Really want to be able to teach my child how to do this rather than have the answer. Thanks
Sunday, January 9, 2011 by Stephen

8th grade history
Can anyone help explain this? when the course of human events it becomes necessary for one people to dissolve the political bands which have connected them with another and to assume among the powers of earth the separte and equal stations to which the laws of nature and of ...
Tuesday, December 14, 2010 by Courtney

8th grade math
Can you please check my answer? A spherical balloon has a volume of 268 cubic cm. If more air is pumped in so that its radius is 3 times as long, what is its new volume? My answer: 2,412 cubic cm
Monday, December 13, 2010 by Elizabeth

8th grade math
Greta is designing a page for the yearbook and needs to know the area of her 8 in. x 10 in. picture after she crops it. If she makes the length and width of the picture 5/8 of the original, how does the area of the picture change?
Monday, December 13, 2010 by Elizabeth

8th grade
When a truck pulls a trailer, the trailer and truck accelerate forward even though the action and reaction forces are the same size but are going in opposite directions. Why don't these forces balance each other out?
Thursday, December 9, 2010 by Anonymous

8th grade
An alloy of metals is 25% copper .Another alloy is 50% copper. How much of each alloy should be used to make 1000grams of an alloy that is 45% copper?
Thursday, December 9, 2010 by Jake

8th grade math
Matt has twice as many quarters as dimes in his coin collection. If the dimes and quarters together total $9.00 how many of each kind of coin does he have?
Tuesday, December 7, 2010 by Anonymous

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 math
there are 3500 species of bees and more than 600,00 species of insects. how many insects are bees. write an inequlity.
Saturday, November 20, 2010 by Anonymous

Math
The 8th grade class is taking a field trip to a concert. Your bus averages 40 mph in the heavy traffic driving to the concert and 60 mph returning home. The total travel time is 2.5 hours. How far away is the concert? How long did it take to get to the concert?
Tuesday, November 16, 2010 by Lady

8th grade science
1.) How does reading across a periodic table compare and contrast with reading down a group on the periodic table?
Monday, November 15, 2010 by jess

8th grade science
1.) How does reading across a periodic table compare and contrast with reading down a group on the periodic table?
Monday, November 15, 2010 by jess

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 science
Peggy is runnig around the school track at a constant speed. The track has two straight stretches on the sides and two curved stretches at either end. Where on the track does Peggy experience balanced and unbalanced forces? Explain your answer.
Thursday, November 11, 2010 by Juan

8th grade science
Peggy is runnig around the school track at a constant speed. The track has two straight stretches on the sides and two curved stretches at either end. Where on the track does Peggy experience balanced and unbalanced forces? Explain your answer.
Thursday, November 11, 2010 by Juan

8th grade math
According to the U.S. Census Bureau, in 2009 men comprised an estimated 93.2% of the veterans in the United States. What is the number of women veterans in the United States in 2009? Express your answer to the nearest whole number.
Wednesday, November 10, 2010 by Anonymous

8th grade math
A company reported that it made a profit of 8% as a percentage of sales and that its sales revenue was $25,000. How much profit did the company make? my answer: $2,000
Monday, November 8, 2010 by Elizabeth

8th grade math
A company's cost of doing business in a recent month was $18,000. Their revenue on sales for that month was $27,000. What percent profit as a percentage of sales did the company earn? my answer: 33 1/3%
Monday, November 8, 2010 by Elizabeth

8th grade math
Can you please check my answer? Selena recieved $42 commission for selling a computer for $1400. What percent is her commission? my answer: 3%
Monday, November 8, 2010 by Elizabeth

8th grade math
Can you please check my answer? Marcia wants to make muffins and needs 3/4 cup of a cup of sugar. She discovers, however,that she has only 2/3 of a cup of sugar. How much more sugar does she need? my answer: 1/12 of a cup
Monday, November 8, 2010 by Elizabeth

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 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

Math 8th grade algerbra
a cylinder has a radius of 3cm and a length of 10cm every dimention of the cylinder is multiplied by 3 to form a new cylinder how is the ratio of the volumes related the ratio of corresponding dimensions? how would i do this?
Wednesday, October 27, 2010 by Courtney

Language Arts 8th grade
Archaic-that which has ceased to be used except for special purposes as in poetry or church ritual some words like thou are archaic list as many words that you can think of that would be considered archaic. i cant think of anymore please help!
Wednesday, October 27, 2010 by Courtney

8th grade
Please help me how you get the answer. PLEASE I NEED HELP. A triangle sail has a perimeter of 25 m. Side a is 2 m shorter than twice side b, and side c is 3 m longer than side b. Find the length of each side. Thank you ver much for helping me
Wednesday, October 27, 2010 by Glenda

8th grade
when a truck pulls a trailer the trailer and truck accelerate forward even though the action and reaction forces are the same size but are in oppsoite direction. Why don't these forces balance each other?
Monday, October 25, 2010 by Kevin

8th grade
mr. macho ate 125 hotdogs over a five day peroid each day he ate seven more hotdogs than the previous day. how many hot dogs did he eat on the first day.
Sunday, October 24, 2010 by bill

8th grade math
The equation d=3.5t + 50 represents the distance in meters,d, that a cyclist is from his home after t seconds. Which pair of values represents a points on the graph of this equation? Explain your answer. (10,85) (0,0) (3,60.5)
Wednesday, October 20, 2010 by john

8th grade
Ryan left musuem and drove south. Gab left 3 hrs later driving 42 km/h to catch up to him. After 2 hrs gab finally caught up. find Ryan's averae speed?
Friday, October 15, 2010 by nancy

8th grade
Sam Squeeze has 10 quarts of a drink that is 60% organge juice. how much pure orange juice must he add to get a drink that is 75% orange juice?
Tuesday, September 28, 2010 by Anonymous

8th grade
Sam Squeeze has 10 quarts of a drink that is 60% organge juice. how much pure orange juice must he add to get a drink that is 75% orange juice?
Tuesday, September 28, 2010 by Anonymous

8th grade
Find the number of Calories in a grapefruit and an orange. (1) An orange has 15 more Calories than a grapefruit. (2) Twenty oranges and ten grapefruit have 1800 Calories.
Monday, September 27, 2010 by Jacqueline

8th grade math
my project is to complete the October calendar, using the following variables in algebric expression to represent each day in the month. Each expression must include all four variable using each variable exactly one. a=1 b=2 c=3 d=4
Monday, September 20, 2010 by Tee

8th grade
Dimensions of a paper cup. The volume of a paper cup, shaped like a circular cone is 30pie cubic centimeters. The radius of the top of the cup is 3 centimeters. What is teh height of the cup?
Wednesday, September 15, 2010 by Chris Molle

8th grade,math/probability
i really need help on this,and i need an answer quick as possible! >< what is the probability of picking a white sock and then a brown sock from a sock drawer,if it contains 10 whites,5 browns,and 8 multi-colored socks?
Tuesday, August 31, 2010 by Luuka

8th grade math
The area of Manhattan Island is 641, 000,000 square feet. According to legend, the Indians sold it to the Dutch for $24. Estimate the area that was purchased for one cent.
Thursday, August 26, 2010 by Shaun

8th grade math
a bank contains 35 nickels, dimes, and quarters. There are four more dimes than quarters and twice as many nickels as quarters. How many of each coins are in the bank?
Wednesday, August 25, 2010 by Toph

8th grade
A leaky faucet fills a 100 millimeter cup in 10 minutes. 1.how much water is wasted in a day?a week?a non leap year? 2.How long does it take to waste a kiloliter of water? (hint:1 kiloliter=1000000 milliliters)
Thursday, August 19, 2010 by timmy

8th grade
robert has a piece of twine 3/4 yards long. he needs a piece of twine that is 2/3 of this length. how long of a piee of twine does robert need?
Tuesday, August 17, 2010 by natalie

8th grade
Right triangle ABC is similar to triangle XYZ because angle B is congruent to angle Y. If angle C equals 27°,what is the measure of angle Z?
Wednesday, June 23, 2010 by Anonymous

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