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Homework Help: 2nd Grade

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

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

math
I need to insert grouping symbols in the expression so that the value of the expression is 14 2x2+3(to the 2nd power)-4+3x5 I have done it in every way and can't get 14

reading 4th grade
looking for someone to tell me where I can find anything on "Tales of a Fourth Grade Nothing"

dividing monomials
what is (x + 7) to the -2 power divided by (x to the 2nd power - 49) to the -1 power

5th grade expectations
my son is going to the fifth grade. What do I need to do to make sure he is ready?

statistics
I am working on setting a formula equal to another-the first formula is A=1.2P and the 2nd the least squares regression line y=-2.433x +950.5. How can I set this equal to obtain a graph of the information

Spanish
Te gusta usar la computadora? Si, me gusta: I know the first part is:Do you like to use computers? Im stuck on the 2nd part.

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.

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...

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...

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 ...

math
2nd question How do I convert an angle of 2.7 degrees to radians?

algebra
Solve the equation Vx + 7 +5=9 a) -3 b) 9 c) 23 d) 16 V= real number root aka 2nd x2 on graphing calc

math
Solve the equation Vx + 7 +5=9 a) -3 b) 9 c) 23 d) 16 V= real number root aka 2nd x2 on graphing calc

algebra
V90x^26/V2x a) 3x^12 V5x bV18x^25 c) 5xV3x^12 d none of there *** the V is the real number root.. aka 2nd x2 on the graphing calc

alg
rationalize the denominator of the expression assume that all variables are positive ^3ã7/^3ã10 i cant get that sign on my pc its 2nd x2 on a graphing calc

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!

linear algebra
i'm not sure how to go about this one. any help would be appreciated! find all x's that would make the 2x2 matrix below = to a shear-dilation: 1st row: 1, x 2nd row: 3, 4

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?

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...

Science HELP 2nd question
A sample originally contained 2.5 g of rubidium 87 now contains 1.25 g. The half life of rubidium - 87 is 6 x 10 ( to the 10th) years. How old is the sample? Is this possible? why or why not?

science
A person's body is thronw outward as a car rounds a curve on the highway is this newton's 1st 2nd or 3rd law

Movies & Science
I am doing a paper that entails my knowledge of physics to prove errors in the movie Transformers. There is one scene in the movie where Shia (Sam, the hero) falls in Optimus Prime's hand, from around 20 stories high. Obviously Sam should ooze out of Prime's hand, but of ...

Film and Physics
I am doing a paper that entails my knowledge of physics to prove errors in the movie Transformers. There is one scene in the movie where Shia (Sam, the hero) falls in Optimus Prime's hand, from around 20 stories high. Obviously Sam should ooze out of Prime's hand, but of ...

SCI 275
What are the challenges of managing Reducing solid waste? What human activities contribute to the problem? I can answer the 2nd question but the 1st one i am having truble with

math
what are the 2 greatest consecutive even integers whose sum is less that 180? for the 1st I got x+2 and for the 2nd I got x+4 to get x+2+x+4<180, and solved to get, x<87. Now.. I cant get the answer. biggg problemo. please help.

chemistry
u was right bob but that makes a change to my other answer for something else my question is: can u tell me of any solid form of a common, neutral substance that only has 3 letters in it 2nd letter is c?

math
draw a shape that can be modelled by the expression 5 x 3 - 2 to the 2nd power. Write a problem for the expressin and evaluate it. Help.....please....!!! ;-(

AP US History
Where can you find sources of the women's movement during the 2nd Great Awakening?

algebra 2
Find the constant term or the term independent of x in the expansion of (3x – 5/x to the 2nd power )and to the 9th power

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.

language
Please help me in figuring out my worksheet that says to follow directions in the order they are given. 1.Write the word solar. 2.Add the 5th letter of the alphabet to the left of each consonant. 3.Add the 5th consonant of the alphabet to the right of the last letter from the ...

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...

social studies
What happens at the 2nd battle of Ticonderoga in July, 1777?

math
evaluate (10 to the 2nd power-4times 8)divided by(8timees 9)

The Five People You Meet in Heaven
2. wikipedia-The_Five_People_You_Meet_in_He​aven I went on the 2nd site you provided and I found the publisher listed as this: Publisher------Little, Brown & Time Warner Paperbacks On my copy it says "Hyperion". What's going on?

Math
The sum of two numbers is 112. The second is 7 more than 4 times the first. What are the two numbers? Am I doing something wrong? I seem to be stuck. x + y =112 (x+7)4y=112 The second equation should be: y+7=4x Should be the 2nd equation. The 2nd one: y is 7 more. This is a ...

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.

Algerbra
5 to the 2nd power-2(5)(4)+-4to the secondpower = I got 25-40+16=59 is that the right way to do this problem yes. yes it is

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 ...

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...

oral report 2nd grade
What would be a good report for a second grader to do, on a person, someone famous, sports person, etc. the kids have to dress the part and give a short report. My 8 year old wants to do David Beckham, is that okay for should we do someone REALLY famous? David Beckham is ...

please check my math
2/3 + 1/5= 13/15. Is that right or can it be Reduced? You're good to go. That is correct... and 2nd question: It can't be reduced.... Good Job!

math
what is the difference between translation , rotation, relections, and dilation in 8 grade work In 8th grade talk, I recommend you check the examples in your book. OR, if you put your definitions here, I can critique them.

ANYBODY HERE?????????????????????????????????
PLEASE ANSWER MY QUESTION! THANK YOU! WHAT IS A PLOT? A plot (in mathematics and engineering) is a graph. It geography, it is a piece of land. In a cemetery, it is a grave site. It can also be a covert plan of action or conspiracy. In English a "plot" can be the form a story ...

math
How do you write a power of 10 in exponents when dealing with 1 hundredth. Thank you 1/100 = 10^(-2) :) 1 divided by 100 is .1, so why is it 10 to the negative 2nd?

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? ...

AP English Literature
This question is for the story "The Awakening" By choosing to devote herself to her art Mademoiselle Reisz • has gone against the expectations of Creole society for women. • has made herself an outcast of sorts. • has gained the admiration and respect of the Creole ...

Math
The city council gave a questionnaire to its citizens, asking them to rank their priorities for next year's budget. People were asked to rank the following four choices: (P)olice, (R)oads, (S)chools, and (T)rash removal. The results are summarized in the table below. ...

English
"First word (8 letters) 2nd word (4 letters) 3rd word (5 letters)" -First name (9 letters) last name (5 letters). Any ideas?

economics
Given demand curve of the monopolist :Q=30-0.3P,& given the cost function C=2Q2+20Q+10, a)find the profit maximizing level of output &price b)determine the max possible profit. c)check for the 2nd order condition.

Math (higher level) 2nd year
A rectangular lawn is surrounded on three sides by flower beds. Each flowerbed is 2m wide. The area of the lawn is 14m(squared). What is the length of the lawn? <---------------- 3x----------------------> ____________________________ |. | /|\ | 2m _____________________...

Social Studies 6th grade
What is a modern form of paper.

4 th grade social studies
What were huge steam engines called?

Physics
An 103 Newtons box of oranges is being pushed across a horizontal floor. As it moves, it is slowing at an acceleration of -0.9m/s2. The push force has a horizontal component of 20N and a vertical component of 25N downward. Calculate the coefficient of the kinetic friction and ...

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 ...

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 ...

Math Unit Geometry Test 8th Grade
Does anybody know the answers for the geometry unit test, 8th grade ?

accounting
Which college or university could I go after grade 12

MATH (7th Grade)
-2.4/5 1/3 -2.4/5.333 =-0.45?????

Math (6th grade)
How do I find the answer to 234 divided by 89 + 53 x 72

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

Math
At one afterschool event, of the students were 8th graders and the rest were 7th graders. Of the students who were in 7th grade, the ratio of boys to girls was 3:5. What percent of all the students at the afterschool event were boys who are in the 7th grade? Help plz

Calculus
A car traveling 96ft/s begins a negative acceleration at a constant rate of 12ft/s^2. After how many seconds does the car come to a stop? How far will the car have traveled before stopping? Anti-derivatives are involved somewhere in the 2nd part I believe.

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?

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?

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 ...

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 ...

fourth grade math
What is 271÷7 with a remainder?

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 ...

7th grade Pre- Algebra
R/5 - 6 = -1 I know the answer is 25, but can you show me the steps. Thank you.

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?

ctps
a company maintain its employee details like: name,number,year of join,age,type of job,monthly salary. -find the employee with highest and lowest salary. -find the employee with 2nd highest in the year of experience. -check weather any employee had joined in 2000.

Maths
The 2nd, 5th, and 14th term Of an AP are consecutive terms of a GP. Given that the sum of the three terms of the AP is 9, find the A, first term and the common difference of the AP. B common ratio of the GP C sum of the first three terms of the GP

Math
Suppose the ice cream shop offers 9 different flavours, and we share 5 scoops. How many ways of ordering are there if All different any combination two scoops of one flavour, two scoops of 2nd, and one of third first one, i did 9! / 5!? second one and third one idk

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

maths
helpp! i am very confused on how to roundup decimals with 1st significant figure, 2nd figure and third figure.These are the decimals : . 6.35228 . 34.026 . 0.005708 . 150.932 . 0.00007835 Pleas guide me through so I will know what to do.

EASY MATH FOR 4TH GRADE
HOW DO YOU MULTIPLY 3,333 and 5?

Math
I need help with homework 2-10 fifth grade

Math
A team plays 120 matches each year. In it's first year, the team won 45% of it's matches. The next year the team won 55% of it's matches. How many more games did the team win in the 2nd year than in the first year?

Math( 7th grade advanced math so 8th grade math)
Salvador bought 3 pounds of oranges that cost x cents per pound, a cucumber for 59 cents, and 2 bananas for 35 cents. Write an expression in simplest form that represents the amount spent. I don't understand how you would write that into an equation. I don't think I should be ...

Math( 7th grade advanced math so 8th grade math)
Bacterial populations can grow to enormous numbers in a matter of a few hours with the right conditions. If a bacterial colony doubles size every 15 minutes, how many bacteria will be present after 1 hour if the colony began with 4 bacteria?

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

Algrebra and Math
Can you help me answer this question? I'm confused, and show me how you did it, that way I can understand on how to solve it more? The total number of students in 8th Grade is 32, including Fran and Billy, Who are one of the female and male students respectively. Fran has ...

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

english 5 grade
I want the imagine paragraph

Math 7th grade
1. 5/6 + 4/9 1/2 9/18 1 5/18 1 1/2

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 ?

Math
Three linear equations are given below. The first is in slope intercept form, the 2nd is in point-slope form and the 3rd is in standard form. Each equation has a slope. What is the sum of the three slopes. 1.y = -2x + 5 2.y + 7 = 6(x − 3) 3.4x − y = 9 1 is -2 2 is ...

US History
Could you pls check this time line 1, king George issues Proclamation of 1763 2, stamp act 3. Sons of Liberty 4. Boston Massacre 5. Boston Tea Party 6, coersive acts 7, 1st continental congress 8. 2nd continental congree 9. First sho of American revolution 10. Bunker hill ...

5th grade math
insert in parentheses: 14+2=6+2x3+2

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

Math
A store has apples on sale for $3.00 for 2 pounds. How many pounds of apples can you buy for $9.00? If an apple is approximately 5 ounces, how many apples can you buy for $9.00? Explain your reasoning? My answer to the first question is 6 pounds of apples for $9.00. I am stuck...

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

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...

Math
Need to simplify (6b to the 2 power)to the 2nd power (6b to the 4th power)to the 4th power equals 24b to the 4th power Not sure if I did this right trying to understand how to simplify. Please help, please.

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 ?

math
At the end of the 8th grade,Lin was 3.6 feet tall.Over the next two years he grew 1.2 feet tall. How tall was Lin at the end of the 10th grade

math
divide 95m long string such that twice of 1st part, 4 times of 2nd part and 5 times of 3rd part are equals

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