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April 24, 2014

Homework Help: 8th Grade

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8th grade math
One of your friends is heading north for the Christmas holiday and the other friend is heading south. If when they start, they are 1029 miles apart and one car is traveling at 53 miles per hour, and the other 45 miles per hour, how many hours before the two cars pass each other?
Wednesday, December 14, 2011 at 8:29pm

8th Grade Chemistry
This is from the Glencoe book Chemistry, Book L. Unlike sodium and chlorine, some atoms becomre more stable by sharing_______, forming______________rather than charged__________. The bonds in a molecule of oxygen are _______ _______ bonds, while the bonds in molecule of water ...
Tuesday, November 15, 2011 at 4:13pm

SLOPE MATH
The grade of a road is its slope given as a percent. for example, a road with a 6% grade has a slope 6/100. it rises 6 feet for every 100 feet of horizontal run. describe a 100% grade. Do you think you could drive up it?could you walk up it? Is it possible for a grade to be ...
Tuesday, November 15, 2011 at 11:38am

math
the grade of a road is its slope given as a percent. for example, a road with a 6% grade has a slope 6/100. it rises 6 feet for every 100 feet of horizontal run. describe a 100% grade. Do you think you could drive up it?could you walk up it? Is it possible for a grade to be ...
Monday, November 14, 2011 at 1:33pm

Spanish-8th grade
This is in regard to my earlier post about the conversation- Thank you for all your help.Thank you for your patience too Could you recheck this? I don't understand about who talks much-my number 10 but I think you put it at #9You said it was the brother not the person but ...
Wednesday, October 12, 2011 at 3:05pm

8th grade math
There are 32 teams in the NFL. Sixteen of the teams are in the American Football Conference (AFL) and the other 16 teams are in the National Football Conference (NFC). At the beginning of the season, Julia tried to predict the teams that would be in each conference's ...
Sunday, September 18, 2011 at 7:15pm

Math
If you are getting a B in everything else in this class but you don't do any of the news item write ups(which are 9% of your grade, then will your final grade be a B? If not a B, then what will your final grade be?
Friday, September 2, 2011 at 4:22am

8th grade math
Hoshi walks 10 meters in 3 seconds. A. What is her walking rate? B. At this rate, how long does it take her to walk 100meters? C. Suppose she walks this same rate for 50sec. How far does she walk? D. Write an equation that represents the distance d that hoshi walks in t seconds.
Thursday, August 25, 2011 at 7:46pm

Math
If Brittany has a 49.7% grade average then for her final exam that is worth 20% of the grade and she gets a 90% what would her final grade be?
Tuesday, May 31, 2011 at 4:51pm

Pre algebra
Kayla has a 41% grade average. On an exam that is worth 20% of her grade she gets a 100%. What is her grade now?
Wednesday, May 25, 2011 at 8:07am

Math
Kayla has a 41% grade average. Then sha takes an exam that is for 20% of her grade and gets an 100%. What is her grade now?
Wednesday, May 25, 2011 at 8:02am

math
What is the 8th term of (3x-1/2y)^10
Monday, May 23, 2011 at 7:39pm

8th grade math
A group of 1,500 high school students were asked to fill out a questionnaire about their future career choices. The circle graph represents the results of the questionnaire. Use the circle graph to answer the question. Doctor: 20% How many students chose doctor as their career...
Monday, May 9, 2011 at 11:00am

math - 8th grade
I have a table to complete.Given that points A and B belong to a circle with centre O; If the area of the sector bounded by central angle AOB is 14.13cm squared and the measure of central angle AOB=45cm squared. What is the radius of the disk(cm)and what is the area of the ...
Sunday, May 8, 2011 at 12:23pm

8th grade physics/science
assume you are standing on a dock and watching the waves pass directly under where you are standing. You count the number of seconds it takes w1,w2,w3 and w4 to pass directly below you. you determine that all four waves below you in two seconds. info: in the formula the length...
Thursday, April 28, 2011 at 10:35pm

Spanish -8th grade- Please check
Which of the following is correct? Mis hermanos tocan a la guitarra. Mis hermanos tocan la guitarra. Mis hermanos juegan la guitarra. I think it is "Mis hermanos tocan la guitarra."
Monday, April 11, 2011 at 1:08pm

Math 8th Grade
Jane's garden is in the shape of a right triangle. One leg of the right triangle is longer than the other leg. The area of the garden is 63 square meters. What is the length of the longer leg?
Wednesday, April 6, 2011 at 1:54am

8th grade Math
Another four-leaf clover also consists of 4 coplanar circles. The large circular leaves are externally tangent to each other, as well as to each of the smaller circular leaves, which are also congruent to one another. The radius of the large and small circular leaves is 1 1/2 ...
Thursday, March 17, 2011 at 2:18am

appling middle
If the data were displayed in a circle graph, what percent of the graph would represent the seventh grade? Enrollment is Sixth grade 64, Seventh grade 64, and Eighth grade is 70
Thursday, March 10, 2011 at 8:32pm

maths
The probabilities of a student getting grade A, B, C and D are 0.2, 0.3, 0.15 and 0.35 respectively. Then the probability that the student gets 1) At least C grade is __________ 2) At most C grade is ___________
Thursday, March 10, 2011 at 1:44am

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 at 9:43pm

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 at 9:43pm

8th grade math
The following pattern continues indefinitely. REPEATREPEATREPEAT… 1) What is the 38th letter in the pattern? Explain your answer. 2) What is the 40th letter in the pattern? Explain your answer. 3) What is the 604th letter in the pattern? Explain your answer.
Thursday, March 3, 2011 at 3:51pm

Spanish-8th grade-Totally confused
Could someone please help me-I'm totally confused on this. I have to say that the person has his/her/their own book or books in the following sentences 1.Yo tengo libro. 2.Ella tiene libros 3.Ellos tienen libro 4.Nosotros tenemos libro For 1, would I put mi 2. sus 3. don&#...
Tuesday, February 22, 2011 at 12:20pm

8th Grade Algebra
Tim and Sasha have a bag containing 7 red marbles, 3 blue marbles, 6 white marbles, and 4 yellow marbles. Tim reaches in, without looking, pulls out a marble, records the color, and then puts the marble back.Sasha then does the same thing. What is the probability that Tim and ...
Friday, February 18, 2011 at 3:44pm

8th Grade Probability
A box contains 6 red balls, 4 white balls, and 5 green balls. If three balls are drawn in succession without being replaced, what is the probability that they are drawn in the order red, white, green?
Monday, February 14, 2011 at 2:10pm

8th grade Algebra
In a drawing for a dvd player, there are 100 tickets in a box.Five of the cards are marked with a star and the rest are marked with an X. To win, Carmen must draw two cards, without replacement, both of which are marked with a star. What is the probability that Carmen will win...
Monday, February 14, 2011 at 12:41pm

math (8th grade)
The length of each piece in a model train railroad built on the HO scale is 1/87 of the actual length. Another popular model is the N scale, for which the scale is 1/160. Each car on a full-size passenger train is 80ft long. What is the length in inches of a model passenger ...
Thursday, February 10, 2011 at 6:02pm

8th grade math
It is estimated that 6,000 tons of nachos will be consumed at Super Bowl XLV viewing events. Suppose a serving of nachos is 1 1/4 oz and each person eats an average of 3 1/2 servings of nachos. If a total of 91,385 people attend the viewing parties at the 373 Champs Sports ...
Monday, February 7, 2011 at 11:54pm

8th grade Math
Khalid uses Penelope’s bag of letter tiles to create a different game in which he tries to randomly draw a set of five tiles with consecutive letters. If Khalid plans to draw five tiles from the bag, without looking and without replacing any tiles, what is the probability...
Tuesday, February 1, 2011 at 12:21am

Pre-Algebra
Find each product or Quotient. Express using exponents. 1. The quotient of a to the 8th power and a to the 8th power? a 2. The quotient of -x to the 5th power and -x? -x to the 4th power 3. (15/5)(n to the 9th power/ n)? 3n go the 10th power Neutral water has a pH of 7. Each ...
Tuesday, January 18, 2011 at 9:07pm

8th grade math
Kyoka holds the world record for earning the most points in this arcade game with a high score of 256 points. If Kyoka did not miss any of the 114 shots she took to set this record, what percent of those shots were made during the final 10 seconds of the game? Express your ...
Thursday, January 13, 2011 at 11:54pm

8th grade math
Mitchell earned a total score of 55 points. Twenty percent of the baskets he made were worth three-points each. If four-fifths of the two-point baskets Mitchell attempted were successful and he made one-third of the three-point baskets he attempted, what is the total number of...
Thursday, January 13, 2011 at 12:17am

8th grade science
I only have one way that the Man-o-War defends them self, their stingers. I need one more way. But my search engine only provides that way. :( Also when the Man-o-war gives birth this happens asexually. but i also need to answer the question how do the man - o- wars find a mate??
Wednesday, January 5, 2011 at 5:02pm

8th grade math
circle A has a raduis that is twice the length og the raduis of circle B. Which is an accurate statement about the relationship of these areas of circle A and B and y? a.the area of circle A is 4 times the area of circle B b. the area of circle A is twice the area of circle B...
Thursday, December 16, 2010 at 10:18pm

8th grade math
After each snowstorm in Big City, USA plows remove snow from 762 lane miles of road, which is equivalent to about 48,000,000 square feet. The snowfall total was 34.2 inches in Big City, USA last winter. Suppose every snowfall evenly blanketed all road surfaces. How many cubic ...
Tuesday, December 7, 2010 at 12:37am

Math
If a grade was drawn at random from the data shown below, what is the probability that the grade is not a B? Grade Frequency A 2 B 8 C 11 D 2 F 1 I think it is 1 out of 5 or 4 but I am not sure? Please help :) Thank you much!
Sunday, December 5, 2010 at 10:02am

8th Grade Math
Can you please check my answer? An American football field is a rectangle 120 yards long (including both end zones) and 53 1/3 yards wide. What is the area of an American football field? my answer: 6360 square yards
Sunday, November 28, 2010 at 5:08pm

8th grade
On the last school day of the first grading period Michael learns his final grade for each class. If order is not important and we know he has earned at least 1 of each of the 5 letter grades, what is the total number of combinations of 7 final grades (one for each class) that...
Monday, November 15, 2010 at 10:41pm

8th grade
According to the U.S. Census Bureau in 2009 there were 21,854,374 veterans in the United States. Veterans of the Korean War accounted for 12.4% of that total, while 10.7% were veterans of World War II. What is the positive difference between the numbers of veterans of the ...
Tuesday, November 9, 2010 at 12:28am

Math 8th grade
I NEED THESE IN ALGEBRAIC EXPRESSION!! The larger of two sums is 12 more than the smaller. Their sum is 84.Find the numbers. The sum of two numbers is 45. The first is 9 less than the second.Find the numbers. The second of two numbers is 5 more than twice the first. Their sum ...
Monday, November 8, 2010 at 6:28pm

8th grade Math
Can you please check my answers? Wally ordered a pizza. He ordered 4/9 of the pizza with sausage, 1/5 of the pizza with extra cheese, and the rest of the pizza with bell peppers. How much of the pizza had bell peppers on it? My answer: 29/45 of a pizza
Monday, November 8, 2010 at 12:03pm

8th grade
smithers think thet he can give the worker a special jucie to make them work faster. he makes two groups of 50. group A get the jucie gorup B did not get the jucie.group A staples 1587 paper group B staples 2113 papers. What is the control group, independent variable, ...
Saturday, November 6, 2010 at 1:07pm

comparing fractions
at Morris Elementarhy there are 45 students in each grade, four though six. In the fourth grade, 19 participate in sports after school. Two out of every six fifth grade play sports after schoo;. In the sixth-grade class, seven of every ten students are not playing sports. ...
Wednesday, November 3, 2010 at 12:11am

8th grade pre algerbra
problem solving investigation: draw a diagram problem: kelly is using 3-inch square tiles to cover a 4-foot by 2-foot area the tiles are 0.5 inches tall if the tiles were stacked on top of each other to create a tower, how many inches tall would the tower be?
Thursday, October 21, 2010 at 7:44pm

8th grade
In 2009 the American League’s New York Yankees won the World Series. The Yankees have played in a total of 40 World Series. Of those 40 appearances the Yankees have won 27 championships. Based solely on this data, what is the probability that the New York Yankees will ...
Thursday, October 14, 2010 at 1:39am

8th grade
A panel of four light switches can be set in 2^4 ways. A panel of lfive light switches can be set in twice this many ways. In how many ways can five light switches be set? I got 2^4=16 16x2=32 Is this right. If not can someone help?
Wednesday, October 13, 2010 at 7:07pm

8th grade
Data plotted on a graph results in a line that slopes upward from left to right. This graph tells you that a)when one variable increases, the other variable decreases. or b) when one variable increases, the other variable increases?
Monday, October 11, 2010 at 7:16pm

science
what is the 8th continent?
Saturday, October 2, 2010 at 5:07pm

algebra 8th
-4.7-(-4.7) = 0 ???
Tuesday, August 31, 2010 at 9:29pm

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 at 9:56pm

8th grade
if the scale of a map is 1/4inches = 1 miles. the distance between two cities on the map is 3 1/4inches. what is the acutal distance ,in miles,between the two cities.
Sunday, August 1, 2010 at 11:44pm

English
Those familiar with the story Animal Farm Please help me come up with a thesis for the prompt: Napoleon Continues to announce new rules that seem less than desirable. The animals seem confused and somewhat annoyed, yet none protest or dare to speak the truth. What do you think...
Monday, June 21, 2010 at 8:34pm

8th grade
how to make a double line graph to show air/water temperatures.mon.air-92 water-68tues.air-94 water-69 wed.air-88 water=70,thurs. air=85 water=72 and friday air=96,water=72
Wednesday, June 9, 2010 at 4:23pm

trigonometry
in triangle abc, angle c is a right angle, AC=8,Bc=15 and AB=17 a.find Sine a b.Find cosine A c.Find Sine B d. Find COsine B E. the measure of angel A f. the measure of angela b Can u tell me the answers and how to do it. Because im in 8th grade
Tuesday, May 18, 2010 at 5:58pm

valedictorian speech topic?
I'm supposed to write an end-of-the-year reflection of my middle school years(valedictorian speech).. help? my teacher choose me to write the speech, almost like a valedictorian speech... its supposed to be describing "my educational experience of 6th, 7th, and 8th ...
Sunday, May 16, 2010 at 5:57pm

8th grade
1 methods of controlling fullness. 2 what is fastening. 3 uses of fastening. 4 pictures of methods of controlling fullness. 5 what is controlling fullness.
Tuesday, May 4, 2010 at 3:04pm

8th grade
warren is going to use the $26,200 in his savings account to buy a new car. The car he plans to buy costs $24,244.33 plus sales tax, which is 4 1/4%(fractions (0.0425). How much money will warren have in his account after buying the car and paying the sales tax?
Friday, April 23, 2010 at 10:38pm

find my grade average
-10% of my grade *82 -20% of my grade *100% *100% *100% *100% *100% *100% *100% *100% *82% -30% of my grade none -40% of my grade *76% reply as soon as possible. thank you!!!!
Sunday, April 18, 2010 at 6:11pm

8th grade
write each radius from the problem situation as a power. radius of 8-inch drumhead: r = radius of 18-inch drumhead: r = radius of 16-inch drumhead: r =
Wednesday, April 14, 2010 at 8:57pm

Math 157-1
Use the data in the grade-distribution Use the data in the grade-distribution table below to construct a circle graph showing the distribution of grade types in Ike’s class. Grade Frequency A 2 B 8 C 11 D 2 F 1 How would the graph change if there were twice as many of ...
Friday, March 19, 2010 at 10:01am

classroom instruction
Search the Internet to locate and review your state’s educational standards for a grade level and subject that interests you, such as second-grade language arts or fifth-grade science. i need help finding information on the state of wisconsin and 1st grade P.E.
Thursday, February 18, 2010 at 10:37pm

school
Hi. My name is Samantha. I'm in the 8th grade. Lots of people have been talking to me abou specialized high school. Can you please give me some information on specialized high school(I mean like what are the good and bad things obout specialized high school)? And can you ...
Friday, February 5, 2010 at 7:29pm

8th grade algebra
A train load of cars and trucks is en route to an automobile dealer for whom you work. Before they arrive, the dealer receives an invoice showing a total of 160 vehicles. Unfortunately, the part of the invoice showing how many of each kind of vehicles has been torn off and ...
Thursday, January 28, 2010 at 8:30pm

8th grade math
Carlos and maria drove a total of 258 miles in 5 hours. Carlos drove the first part of the trip and averaged 53 miles per hr maria drove the remainder of the trip and averaged 51 miles per hr for how many hrs did maria drive
Thursday, January 28, 2010 at 7:39pm

8th grade
Laura is training her pet white rabbit, Sugar, to climb up a flight of 25 steps. Sugar can hop up one or two steps at a time. She never hops back down, only up. How many different ways can Sugar hop up the flight of steps? PLEASE HELP!!!! I'M TOTALLY LOST!!!
Monday, January 18, 2010 at 9:18pm

8th Grade Social Studies
I'm sorry, I know that you really can't give out answers but I've been trying to figure this out for a couple hours so I'm posting it anyways. (-_-') The Constitution gives the House of Representatives the authority to a. bring criminal charges against a ...
Sunday, November 15, 2009 at 11:13pm

physical science 8th grade
Copper has 2 known isotopes: ^63CU atomic mass= 62.9298 and ^65 CU atomic mass=64.9278. The average atomic mass of copper is 63.546 amu. Calculate the fraction(percent) of each of the 2 isotopes of copper
Wednesday, November 4, 2009 at 5:34pm

Math
Use the data in the grade-distribution table below to construct a circle graph showing the distribution of grade types in Ike’s class. Grade..Frequency A......2 B......8 C......11 D......2 F......1 How would the graph in Exercise 7 change if there were twice as many of ...
Sunday, November 1, 2009 at 4:34pm

8th grade
Can you write an essay of the great wakening as told by a colonist that explains why at least one figure was popular (ig: George Whitefield), explains why someone of influence has ability to persuade, explains themes of great awakening and applies themes of great awakening to ...
Saturday, October 31, 2009 at 11:12pm

Math
Use the data in the grade-distribution table below to construct a circle graph showing the distribution of grade types in Ike’s class. Grade..Frequency A......2 B......8 C......11 D......2 F......1 How would the graph in Exercise 7 change if there were twice as many of ...
Tuesday, October 27, 2009 at 10:52am

8th grade
At a faculty costume party, each teacher from transylvania Middle School came dressed as his or her favorite creepy creature. The teachers arrived one at a time, and when a new teacher came in, each of the teachers already there lined up at the door and shook hands with the ...
Monday, October 26, 2009 at 4:44pm

8th grade math
An airplane flies from New Orleans to Atlanta at a rate of 320mph. The airplane then returns at a rate of 280mph. The total travel time is 3 hours. What is the flying time from New Orleans to Atlanta?
Tuesday, October 20, 2009 at 11:37pm

8th grade math
An airplane flies from New Orleans to Atlanta at a rate of 320mph. The airplane then returns at a rate of 280mph. The total travel time is 3 hours. What is the flying time from New Orleans to Atlanta?
Tuesday, October 20, 2009 at 11:35pm

8th grade
Lori wants to go to the beach on saturday but she's not sure if she has enough gas in her car to drive there and back home. The beach is 77 miles from Lori's house but the car gets about 28 miles per gallon. How many gallons of gas does Lori need to have in her car to ...
Monday, October 19, 2009 at 11:47pm

8th grade physical science
A student measured the mass of an object and obtained the following results: 10.1 g, 11.0 g, and 10.5 g. The actual mass of the object was 10.6 g. a. What should the student report as the mass of the object? My answer: The student should report the mass as 10.5, because that ...
Tuesday, October 13, 2009 at 3:34pm

8th grade science
the length of a piece of string is known to be exactly 9.84 cm. two students measured the string. student A used a ruler marked in centimeters and got a measurement of 10 cm. student B used a ruler marked in millimeters and centimeters and got a measurement of 9.8 cm. how ...
Friday, October 2, 2009 at 1:51pm

8th grade - science
the length of a string is known to be exactly 9.84cm. two students measured the string. student A used a ruler marked in centimeters and got a measurement of 10 cm. student B used a ruler marked in millimeters and centimeters and got a measurement of 9.8 cm. which student'...
Friday, October 2, 2009 at 10:20am

8th grade math
Light travels approximately 5.87 X 10^12 miles in one year. This distance is called a light year. Suppose a star is 2 X 10^4 light years away. How many miles away is that star? Please help with detailed steps to solve problem. Thanks.
Wednesday, September 30, 2009 at 12:34pm

8th grade math
Light travels approximately 5.87 X 10^12 miles in one year. This distance is called a light year. Suppose a star is 2 X 10^4 light years away. How many miles away is that star? Please help with detailed steps to solve problem. Thanks.
Tuesday, September 29, 2009 at 5:09pm

8th grade
According to the CIA fact book there were 1018057384 internet users in 2005. The same source states that in 2005, Canada had 22 million internet users. What percentage of internet users in 2005 were canadian? Give the answer in standard, word, expanded form and scientific ...
Wednesday, September 16, 2009 at 9:03pm

8th grade
You complete a project for your social studies class. There are 3 parts to the project, worth a total of 100 points. You get 50 out of 50 points on part A, and 23 out of 25 points on part C. The total score you received is 93 out of 100. How many points did you get on part B?
Monday, August 24, 2009 at 1:52am

Algebra 1- 8th Grade
According to the 1990 Census, the population of the United States was 2.49 x 10^8. The cost of taking the census in 1990 was 2.6 x 10^9 dollars. How much did the census cost per person in the United States?
Wednesday, April 29, 2009 at 9:52pm

Language Arts
We have state testing this week [CRCT] and I'm reviewing for the Language Arts part. 8th grade students are required to know a ton of stuff by this time, but one thing I don't understand is simple, compound, and compund-complex sentences. They confuse me and I need to ...
Tuesday, April 21, 2009 at 10:03am

8th Grade Algebra
To make the Chinese dish "dragon's beard noodles," fold a 5 ft. strand of dough in half. Stretch the dough back to its original length so that two thinner strands are formed. Repeat this folding and stretching process over and over to produce increasing numbers ...
Saturday, April 18, 2009 at 2:59pm

8th Grade Algebra
You know how to solve quadratic equations using algebra, graphs and the quadratic formula. Sometimes one method of solving is more convenient than another method. Describe how you would solve each equation. Give reasons for you answers. A) 16x^2 = 1600 B) x^2 - 350 = 0 C) x^2...
Monday, March 30, 2009 at 9:34pm

8th Grade Algebra
10) a. A recipe for pizza dough says to use a 10 in. by 14 in. rectangular pan. Jake only has a circular pan with a 12 in. diameter. If Jake makes the pizza in his circular pan, will the crust be thicker or thinner? Explain. b. Suppose Jake wants to make a round pizza that is ...
Wednesday, March 25, 2009 at 8:16pm

8th grade history project
I am doing a history project on marketing inventions from the 1800s. I have to create a poster that includes a catchy slogan for a factory system. (remember that it is from the 1800s.) If you could help give me some ideas that would be great!!! thank you so much! If possible, ...
Tuesday, March 17, 2009 at 9:00pm

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 at 10:14pm

Science (atoms) 8th grade
Speeds up or slows down? By stirring a gas in a liquid, its solubility ____________ the dissolving process. High or low? A gas's solubility is is faster in a liqud when under __________. How do the methods of speeding the rate of solution for dissolving a solid in a liquid...
Tuesday, March 10, 2009 at 4:30pm

8th Grade Algebra
These are extra credit questions, and I just want to know how to solve them. 1) The sum of two-digits of a two digit number is 14. If the number represented by reversing the digits is subtracted from the original number, the result is 18. What us the orinal number? 2) If 27 is...
Wednesday, March 4, 2009 at 12:20am

8th Grade Algebra
1) An exam will have 20 questions worth a total of 100 points. There will be True-False questions worth 3 points each and short essay questions worth 11 points each. Several students ask how many essay questions there will be, but the teacher won't tell. How many essay ...
Wednesday, February 25, 2009 at 10:49pm

8th Grade Algebra- Answer Check
Solve each system of equations, give the solution and state whether there are no solutions or many solutions. 1 )3x + 8y = 1 7x + 4y = 17 Answer: (3,1) 2) -3x + 5y = -7 9x + 2y = 38 Answer: (4,1) 3) 7r + 3s = 13 14r - 15s = -16 Answer: (1,2) 4) 2x - 7y = 42 4x - 14y = 64 ...
Wednesday, February 25, 2009 at 8:47pm

8th math(Algebra)
what is 8a+b=1 8a-3b=3
Wednesday, February 18, 2009 at 6:36pm

8th Grade Space and Earth Science
I have two questions about my study guide for my science test tomorrow. Thank you for any answers that I can get! How does the atmosphere give evidence for divine design? How can a satellite telephone user communicate if radio waves reflect off the ionosphere? Perspiration ...
Tuesday, February 3, 2009 at 9:44pm

8th grade algebra
You see a firefighter aim a fire hose from 4 feet above the ground at a window that is 26 feet above the ground. The equation h=-0.01d^2+1.06d+4 models the path of the water when h equals height in feet. Estimate, to the nearest whole number, the possible horizontal distances...
Sunday, February 1, 2009 at 12:24pm

8th grade
People can be left-handed, right-handed or ambidextrous. The number of boys in Canadian secondary schools who are left handed is about 1/7 the number of boys who are right-handed. About 11% of boys are left-handed. Write and solve an equation to determine what percent of boys ...
Monday, January 26, 2009 at 7:52pm

8th grade Math
Megan has at most $1500 to invest. She plans to invest some of the money in a long-term CD at 6% and some of it in a short-term CD at 3%. She wants to earn at least $75 in interest per year. Write a system of inequlites to represent the situation, and use it to find all of the...
Sunday, January 25, 2009 at 4:17pm

8th Grade Algebra: Answer Check
Find the length of the 3rd side of each right triangle. 1. 8^2+15^2=c^2 Answer: c=17 2. 5^2+b^2=13^2 Answer: b=12 3. 9^2+13^2=c^2 Answer: c~15.81 Simplify. Assume that all variables are nonnegative. { this means square root 4. {12 Answer: 2{3 5. 2{75 Answer: 10{3 6. -3{72 ...
Tuesday, January 20, 2009 at 10:42pm

8th Grade Algebra-Radicals:Answer Check
4. 3ã11 + 4ã11 Answer: 8ã11 7. 7ã2 - 2ã8 Answer: 1ã2 ?? 8. ã48 + ã75 Answer: 9ã3 9.(3ã10) Answer: 19 + 6ã10 10. ã27/64 (...
Tuesday, January 13, 2009 at 11:23pm

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