# Homework Help: 8th Grade

**chemistry**

i have a question on scientific notation. is you have: 8x10 to the 5th power over 2x10 to the -3rd power is the answer 4x10 to the 8th?

*Wednesday, September 10, 2008 by Mary*

**trig**

in an algebra class of 21 students the mean grade on a test was 87; in another class with 32 students the mean grade was 81. What is the combined mean of the two classed? my teacher said it's 21 * 87 + 32 * 81/53= 83.4 but i'm not sure where the 53 came from.. thanks in advance

*Monday, September 8, 2008 by jerson*

**trig.**

in an algebra class of 21 students the mean grade on a test was 87; in another class with 32 students the mean grade was 81. What is the combined mean of the two classed? my teacher said it's 21 * 87 + 32 * 81/53= 83.4 but i'm not sure where the 53 came from.. thanks in advance

*Monday, September 8, 2008 by jerson*

**reading 4th grade**

looking for someone to tell me where I can find anything on "Tales of a Fourth Grade Nothing"

*Monday, August 11, 2008 by LaNoria*

**5th grade expectations**

my son is going to the fifth grade. What do I need to do to make sure he is ready?

*Friday, July 18, 2008 by lucretia*

**Problem Solving**

Lindsey has 75% as her final grade, but after she writes her exam she gets 85%. If her exam is worth 7.5%, what is her final grade.

*Saturday, June 14, 2008 by Carrie*

**about economics book**

any has the question's answer of arnold roger's micro economics book(8th edition).pls help me.

*Friday, June 13, 2008 by tapos mitra*

**Part 1**

Consider the following selection statement where X is an integer test score between 0 and 100. input X if (0 <= X and X < 49) output "you fail" else if (50 <= X and X < 70) output "your grade is" X output "you did OK" else if (70 <= X and X < 85) output "your...

*Wednesday, June 11, 2008 by Anonymous*

**Part 1**

input X if (0 <= X and X < 49) output "you fail" else if (50 <= X and X < 70) output "your grade is" X output "you did OK" else if (70 <= X and X < 85) output "your grade is" X output "you did well" else if (85 <= X and X < 100) output "your grade is" X...

*Wednesday, June 11, 2008 by Anonymous*

**biology**

what happens when there is excess of glucose in the blood? please give the answer big and simple bcz im an 8th standard student

*Tuesday, May 13, 2008 by humi*

**6th Grade Math**

I really don't know what to do on this question. If someone could start me off I could probably get the answer. Remember I am in 6th grade. Dani has a sack of 50 pens. Of these, 10 are black, 15 are blue, and the rest are red. If she grabs a handful of 5 pens, how many would ...

*Monday, April 21, 2008 by Missy*

**Science 8th grade**

please check my answer thanks I need to write at least one paragraph regaurding this Urinalysis is a very commo diagnostic test. Describe and name the poddible abnormal results related to the test.. indicate the disorders tha these abnormal test results may sugguest. My answer...

*Tuesday, April 1, 2008 by Anonymous*

**geometrey**

The grade of a road is 7%. What angle does the road make with the horizontal? I'm confused!! What is the grade of a road? Thanks for the help!

*Monday, March 10, 2008 by anna*

**science: help**

i need to do a science fair project. i am in 7th grade and my teacher said that it can't be something a 6th grade or younger could do. i wanted to do something with kinetic energy. like maybe drop an egg from different heights and measure its k.e. any suggestions?

*Friday, March 7, 2008 by Brooke*

**maths**

finf the definite integral of the following h(u)=cos^2(1/8*u) (8th*u)

*Wednesday, March 5, 2008 by cecelia*

**8th math**

What are the odds of having a coin land tails up on 4our consecutive tosses of the coin. I took (1/2)^4 and got 1/16 but my teacher counted it wrong is 1/16th right?

*Saturday, March 1, 2008 by Gina*

**MATH-PERCENTILES**

I JUST TOOK A TEAS TEST(FOR PRACTICAL NURSING ADMISSIONS). THE REQUIREMENTS MUST BE A GRADE IN AT LEAST THE 40TH PERCENTILE IN EACH SUBJECT. THERE WAS A MATH, READING,ENGLISH, AND SCIENCE SECTION. TOTAL OF QUESTIONS WERE 170.MATH-45? READING-40? ENGLISH-55 ? SCIENCE-30 ? I WAS...

*Saturday, February 9, 2008 by TORI*

**latin**

I have to write an analysis of Catullus 8th poem. Tips on how to write analysis please?

*Sunday, January 27, 2008 by Anonymous*

**English**

Any one got any book recommendations for a 8th to 9th grader?

*Sunday, October 28, 2007 by Anonymous*

**English**

I need some recommendations for a challenging book for an voracious reader who can read advanced books and understand them. Somewhere of a reading level of 8th,9th or 10th.

*Tuesday, October 23, 2007 by Anonymous*

**algebra**

Sam must have an average of 70 or more in his summer course to obtain a grade of C. His firs three test grades were 75,63, and 68. Write an inequality representing the score that Sam must get on the last test to get a C grade.

*Wednesday, October 10, 2007 by seano*

**math**

An instructor counts homework as 1/3 of the student's grade and the final exam to be 2/3 of the student's final grade. Going into the final exam a student has a homework grade of 48%. What range of scores on the final exam would put the student's final average between 70% and...

*Sunday, September 30, 2007 by Jessica*

**physics**

find the average of a block being propelled propelled by an elastic band. very sorry to disturb Mr bobpurlsey again. i am very thankful to you replies. the only problem that lies in the answer is that i haven't been taught hooke's law in Grade 11. which indicates 1/2kx^2 i ...

*Wednesday, June 13, 2007 by james*

**random**

I dunno. Why don't u wait 4 a teacher 2 answer that? I guess any grade that can type and ask Qs. :p any grade.

*Monday, May 7, 2007 by Lily*

**English**

what is a good historical fiction book for an 8th grade reader? There are several good historical fiction books listed in these sites. http://www.education-world.com/summer_reading/8th_grade.shtml http://www.ci.torrance.ca.us/Library/11496.htm I can recommend ...

*Wednesday, March 21, 2007 by betsy miller*

**math**

Ted must have an average of 70 or more in his summer course to obtain a grade of C. His first three test grades were 75, 63,and 68. Write an inequality representing the score that Ted must get on the last test to get a C grade. Let X be the grade on the next test. The average ...

*Monday, March 19, 2007 by cheryl*

**Math**

Are you trying to solve for x, n or p? solve for n Show me how to work this problem. 2n = 4xp - 6 what is the problem? what grade r u in i am in 6 grade To get n all by itself, you need to divide by 2. But if you divide by 2 on the left, you have to divide by 2 on the right...

*Wednesday, March 14, 2007 by drwls*

**????Math Question????8th grade adv.math**

Algebra! How is the distance formula and the pythagorean theroem similar? The distance formula follows from the pythagorean theorem. You have to apply it twice: If (x1, y1, z1) are the coordinates of a point 1 and (x2, y2, z2) are the coordinates of point 2, then the distance ...

*Wednesday, February 7, 2007 by Alex*

**Physics**

An object moves in a circular path with constant speed. Is the object's velocity constant? Is its acceleration constant? Please explain. From what I've learned in my 8th grade science class, when velocity changes is when the direction or speed changes. So if it is moving in a ...

*Wednesday, January 10, 2007 by anonymous*

**math??**

What is 4 to the 8th power? paste this in the google search window: 4^8= 65536 thanks but rc

*Monday, November 13, 2006 by Rodger Paxess*

**Math**

Homework grades are 5% of the overall grade. Lab work is 15% of the overall grade. Tests are 60% of the overall grade. The Final is 20% of the overall grade. Could a student that has a 75 homework average, 80 lab average, 40 test average, and 50 on the final pass the course? ...

*Tuesday, September 19, 2006 by Veronica*

**Linear Algebra**

I need help for the Linear Algebra B Unit 2 test. Please help. 1. For the data in the table does Y vary directly with X? If it does, write and equation for the direct variation. l X l Y l l 10 l 15 l l 16 l 24 l l 20 l 30 l A- Yes: Y=1.5X B- Yes: Y=2x C- Yes: Y=x+5 D- No: Y ...

*Friday, March 17, 2017 by Noone*

**Social Studies 6th grade**

What is a modern form of paper.

*Wednesday, March 8, 2017 by Dan*

**4 th grade social studies**

What were huge steam engines called?

*Tuesday, March 7, 2017 by Ashley*

**Algebra**

A clock's minute hand moves 60 grade in 10 minutes and 180 grade in 30 minutes low far does it move from 11:00 to 11:40? What is the problem asking you to find? The measure of the angle on a clock from What do you need to know to solve the problem? What is the measure of the ...

*Friday, March 3, 2017 by Marina*

**statistics and probability**

n a written test given to a large class comprising 42 students, the test scores were found to be normally distributed with a mean of 78 and a standard deviation of 7. A minimum score of 60 was needed to pass the test. A score of 90 or greater was needed to earn an A in the ...

*Tuesday, February 14, 2017 by faye*

**Algebra**

Scholmo reads 7 pages of his book on the first day and his rate of reading then goes up by 3 pages each day. a) How many pages will he have read on the 8th day? b) After how many days will he have read more than 425 pages?

*Thursday, January 26, 2017 by Alice*

**accounting**

Which college or university could I go after grade 12

*Sunday, January 15, 2017 by Ndlandla*

**MATH (7th Grade)**

-2.4/5 1/3 -2.4/5.333 =-0.45?????

*Thursday, January 12, 2017 by marilyn*

**Math (6th grade)**

How do I find the answer to 234 divided by 89 + 53 x 72

*Wednesday, January 11, 2017 by Sally*

**all**

For highschool what percentages correspond with grade letters. like is a 91% an A, A-, or A+

*Monday, January 9, 2017 by Anonymous*

**Math**

A science class has 3 girls and 7 boys in the seventh grade and 5 girls and 5 boysin the eighth grade. The teacher randomly selects a seventh grader and an eighth grader from the class for a competition. What is the probability that the students she selects are both girls?

*Monday, December 12, 2016 by Tay*

**Math**

A science class has 3 girls and 7 boys in the seventh grade and 5 girls and 5 boysin the eighth grade. The teacher randomly selects a seventh grader and an eighth grader from the class for a competition. What is the probability that the students she selects are both girls?

*Monday, December 12, 2016 by Gia*

**Chemistry**

I am using 85% ACS grade phosphoric acid. I need to make a 21% phosphoric acid solution with a total volume of 250ml. I have been told that 37ml of the 85% ACS grade phosphoric acid plus 188ml of Deionized water will create the 21% phosphoric acid solution I need to make. I'm ...

*Friday, December 9, 2016 by Melissa*

**math algebra**

At a college, records show that the average persons grade point average, G, is a function of the number of hours he or she studies and does homework per week h. The grade point average can be estimated by the equation : G=0.01h^2 +0.2h+1.2 To obtain a 3.2 GPA how many hours ...

*Wednesday, December 7, 2016 by tom*

**fourth grade math**

What is 271÷7 with a remainder?

*Monday, December 5, 2016 by Anonymous (no name pl*

**MATH**

Taylor surveys students in one grade level who own at least one pet. She finds that 50% of the students surveyed own 2 pets, 3 students own 3 pets each, and 2 students own 4 pets each. Eight of the students in the grade own 1 pet. Considering the number of pets as the random ...

*Friday, December 2, 2016 by Anonymous*

**7th grade Pre- Algebra**

R/5 - 6 = -1 I know the answer is 25, but can you show me the steps. Thank you.

*Saturday, November 26, 2016 by PLEASE HELP!!!*

**Math**

Ricky took a survey in the fifth grade and found that 2/3 of the students ride the bus to school and 1/4 of the students walk. What fraction of the fifth grade students either ride the bus or walk to school?

*Monday, November 21, 2016 by Mark*

**Math**

Plz help me what dose underestimate mean ps in 5th grade

*Wednesday, November 9, 2016 by Essence Forbes*

**8th algebra**

I only need help writing the equation, not solving it. This is sothe problem. Manuel's budget allows no more than $50 per week for gasoline and car washes. Gasoline costs $2.30 per gallon, and a car wash costs $8.50. This week, Manuel gets a car wash. Write an inequality to ...

*Monday, October 31, 2016 by Martha*

**EASY MATH FOR 4TH GRADE**

HOW DO YOU MULTIPLY 3,333 and 5?

*Sunday, October 23, 2016 by Anonymous kid (no name pl*

**Math**

I need help with homework 2-10 fifth grade

*Wednesday, October 19, 2016 by Emma*

**Data management**

How many ways can 5 student receive a grade A or E

*Monday, October 10, 2016 by Funkyjedman*

**Marh**

If I missed 9 questions out of 27 what wil my grade be

*Monday, October 3, 2016 by Anonymous*

**english 5 grade**

I want the imagine paragraph

*Monday, October 3, 2016 by fried*

**Math 7th grade**

1. 5/6 + 4/9 1/2 9/18 1 5/18 1 1/2

*Tuesday, September 27, 2016 by Lakota*

**math**

f i have a 100 in a class and i get a 0 on something that is worth 23% what will my grade be ?

*Tuesday, September 27, 2016 by question*

**5th grade math**

insert in parentheses: 14+2=6+2x3+2

*Friday, September 23, 2016 by john*

**math**

Each test grade in Sara's science class counts for 1/6 of the final grade. The final exam counts for 1/2. Sara's test scores are 72, 84, and 90. Her final exam score is 90. What is Sara's final grade for the class? A) 83 B) 86 C) 87 D) 89

*Thursday, September 22, 2016 by Scribble*

**maths**

if 8th term of an AP is equal to 5 terms its second term .if the 5th term is 8 find the first 10 terms

*Thursday, September 22, 2016 by dru*

**Math**

Mandy had 22 correct her grade was 80% how many questions on the test?

*Thursday, September 15, 2016 by Ja'Quan*

**stats**

Jason, a freshman at a local college, just completed 15 credit hours. His grade report is presented below. Course: Calculus, Biology, English, Music, P.E. Credit Hours 5, 4, 3, 2, 1 Grades C, A, D, B, A The local university uses a 4 point grading system, i.e., A = 4, B = 3, C...

*Thursday, September 15, 2016 by Ana*

**Algebra 1**

The number of boys to girls any grade level is 7:2. If there are 48 girls in the grade level how many boys are there ?

*Wednesday, September 7, 2016 by Anonymous*

**math (7th) grade**

simplify -2.6 + (-5.4)pls help

*Friday, August 26, 2016 by ary*

**7th grade math**

1 5/6 divided by 5 2/5

*Thursday, August 25, 2016 by mythreyee*

**business**

Writeaprogramthataskstheusertoenterastudent’sgradesonfourexams.The program should display the four grades and the average of the four grades, round- ed to the nearest tenth. To add the grades, use a variable called total_grade, which you should initialize to zero. As ...

*Wednesday, August 24, 2016 by kurt*

**Math- arithmetic**

A pile of blocks has 60 blocks in the bottom row, 54 blocks in the second row, 48 blocks in the third row, and so on until there are only 6 blocks on the top row. How many blocks are in the 8th row? 10th row?

*Wednesday, August 17, 2016 by Ria*

**math**

If earth rotates at about 1000 mph and it rotates constantly each day. How many rotations will it complete after 4th hour, 8th hour and 24th hour.

*Sunday, July 17, 2016 by gieian*

**maths**

the sum of 8th term in an a.p is 150 while the sum of 20th term is 880.find the 43rd term and the sum of the 12term

*Tuesday, July 12, 2016 by debby*

**English grammar**

What is the prepositional phrase is the following: 1. We were doing a mathematical test when the fire alarm rang yesterday. 2.The new girl in our ESL class has a brother I grade 7 and a sister in grade 9. 3.I didn't know what time it was so I very late to class. 4.To build a ...

*Saturday, June 18, 2016 by Divyan*

**math**

Mercy must obtain an average mark of at least 85 to get an A grade in her mathematics examination,out of the four examinations she obtained 80,85 and 82 in the first three. Find the mark she must obtain on the fourth examination of to enable her get an A grade.

*Saturday, June 11, 2016 by Glory*

**Math Urgent Please Help**

Which construction is illustrated below? a. a perpendicular to a given line from a point not on the line b. a perpendicular to a given line from a point on the line c. perpendicular bisector of a given segment d. bisector of a line segment Please help with this. It doesn't get...

*Thursday, June 2, 2016 by Mame*

**math**

The students at Millerville High School were surveyed about their favorites type of music. The results are in the table. to the nearest whole percent, what percent of the students who chose country as their favorite are in 9th grade? a.63%,b.39%,c.24%,d.20% Favorite type of ...

*Friday, May 20, 2016 by marilyn*

**SOCIAL STUDIES 8TH**

I am doing a porfolito on connexus and i picked andrew jackson and henery clay but come up with nothing... i have to make a diolouge between the two about there belifs there dreams for the united states and how they would express there opinions.. and what theywould say about ...

*Wednesday, May 18, 2016 by BRENNON DAVIS*

**S.st**

What are the answer for number 3 and 4 in week 17 for 4th grade??..

*Thursday, May 12, 2016 by Chi*

**math**

If my teacher grades a test of 54 questions and I get 18 wrong what will be my grade?

*Monday, May 9, 2016 by adeline*

**math**

The 3rd term of an Arithmetic Progression is 10 more than the first term while the fifth term is 15 more than the second term. Find the sum of the 8th and 15th terms of the Arithmetic Progression if the 7th term is seven times the first term.

*Sunday, May 8, 2016 by Toba*

**5th grade math**

If y is less than twice x , and x is 15. What is y

*Thursday, May 5, 2016 by Kezia*

**math**

Grade 5 will plant 1/3 of the whole school garden. So far, they have planted ¼ of the whole school garden. What fraction of the school garden still needs to be planted by grade 5?

*Tuesday, May 3, 2016 by Drequan*

**Math college grade 12**

1=300(0.8)^t

*Monday, April 18, 2016 by Yineya*

**11th grade physics**

How do we know which plate has an excess of electrons?

*Tuesday, April 12, 2016 by angy*

**Math**

There are 55 student in eight grade middle school that play different sports. 27 of them play soccer, 15 of them play basketball. 11 of them play soccer or basketball. What is the probability given that the they are in eight grade and play sports that they play both soccer and...

*Thursday, March 31, 2016 by Korbin*

**Math**

Do you have any 3rd grade math practice worksheets that I can use with my students? One of my students has a predicament of not doing his homework. Please implement your time and implementing a few practice worksheets for my students. Sincerely, Mrs. Raja 3rd grade teacher

*Tuesday, March 29, 2016 by Mrs. Raja*

**Science**

What if a student gets a 65 on 1 test and 100% on 4 tests? What will there grade be?

*Wednesday, March 23, 2016 by Anonymous*

**math help pls pls pls**

Choose the correct simplification of the expression the quantity a to the 2nd power over b to the 3rd power all raised to the 4th power. A. a to the 6th power over b to the 7th power B. b^12 C. a^8b^15 D. the quantity a to the 8th power over b to the 12th power pls help me

*Monday, March 21, 2016 by Oscar*

**Programming C++ using Data Structure.**

In an academic institution, Student has its records. Each student has his/her profile such as id number, student name. The institution also keeps records of student grades in each subject. Student grades contains information subject description, school year, semester, and ...

*Thursday, March 17, 2016 by Vonn*

**math**

a student’s grade in a class is simply the mean of five 100-point exams a. If the student has grades of 77, 73, 97, and 89 on the first four exams, what is the students’ grade before taking the last exam? b. What is the lowest score that the student can earn on the last ...

*Monday, March 14, 2016 by Debbie*

**2nd grade math**

7+5=8+ What number makes this equation true

*Friday, March 11, 2016 by Milan*

**8th grade science**

I'm not sure what's the correct answer: 9)Which of these characteristics can only be attributed to a wave of red light? A)The energy of the wave travels in the same direction as the wave travels. B)The wave travels by vibrating the particles of the medium at a high rate. C)The...

*Monday, March 7, 2016 by Alexis*

**Mathematics grade 9**

Calculate and compensate 823-273

*Sunday, March 6, 2016 by Kgahli*

**math 8th**

The scores on a test are found by adding and subtracting points as shown in table below. If Salazar's score on a 15 question test was 86 points,how many of his answers were correct, incorrect and blank. Answers Points correct +8 incorrect -4 blank -2 86 divided by 14 = +6, -2...

*Thursday, March 3, 2016 by Daniel*

**Geometry**

In the diagram to the left, ÚABC\angle ABCÚABCangle, A, B, C and ÚDCB\angle DCBÚDCBangle, D, C, B are right angles. Which of the following is closest to the length of DE‾\overline{DE} DE start overline, D, E, end overline? I am ...

*Tuesday, March 1, 2016 by Tyteana*

**10 grade literature**

Correct punctuation of , That is in my opinion depressing.

*Friday, February 26, 2016 by Debbie*

**Statistics**

The mean grade in this class last semester was 78.3, and the variance was 49 . The distribution of grades was unimodal and symmetrical. Using this information determine the probability that “Joe”, a random student you know nothing about, other than the fact that they are ...

*Thursday, February 25, 2016 by Francisco*

**6th Grade Math**

How do you write (1/2) to the 5th power? (Not answered)

*Monday, February 22, 2016 by PJ Schrammel*

**Algebra**

A math class has 7 girls and 5 boys in the seventh grade and 4 girls and 4 boys in the eighth grade. The teacher randomly selects a seventh grader and an eighth grader from the class for a competition. What is the probability that the students she selects are both boys? Write ...

*Monday, February 22, 2016 by Anesha*

**maths**

if the 8th term of an AP is 37 and the 5th term is 15 more than the 12th term. find the AP. hence find the sum of the first 15 terms of the AP.

*Sunday, February 21, 2016 by manisha*

**8th grade math - Variations**

Can you check the following, please? 1. Two minutes after a skydiver opens his parachute, he has descended 1900 feet. After 5 minutes, he descended 4750 feet. If distance varies directly with the time, at what rate is skydiver descending? Ans: to find unit rate -1900/2 = 950 -...

*Monday, February 15, 2016 by Alexis*

**Math**

A science class has 3 girls and 3 boys in the seventh grade and 4 girls and 1 boy in the eighth grade. The teacher randomly selects a seventh grader and an eighth grader from the class for a competition. What is the probability that the students she selects are both boys?

*Sunday, February 14, 2016 by Brooke*