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December 20, 2014

Homework Help: 2nd Grade

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5th grade math
i need help
Tuesday, November 27, 2012 at 5:48pm

calculus
A multistoried building has a floor area of 2,000 square feet on the ground floor, 1,995 square feet on the 1st floor, 1,990 square feet on the 2nd floor, and so on. If the areas of the higher floors follow this sequence, what is the expression to calculate the area of the nth...
Tuesday, November 27, 2012 at 11:14am

computing extrapolation
Derive the central difference approximation for f''(x) accurate to O(h^4) by applying Richardson extrapolation to the central difference approximation of O(h^2). where f'' = 2nd derivative of x
Saturday, November 17, 2012 at 4:27pm

computing/maths
Derive the central difference approximation for f′′(x) accurate to O(h4) by applying Richardson extrapolation to the central difference approximation of O(h2). (Note that f''(x)= 2nd derivative of x)
Sunday, November 11, 2012 at 8:27am

Math 8R: Homework Check - Part 3
Part 3 : Evaluate when x = -2, y = 5 21. 4x + 2y, Answer: 2 22. 3(x) *to the 3rd power*, Answer: -221 23. (x + y) *to the 2nd power*, Answer: 9 24. -4x + 2y, Answer: 18 Please check to see if my answers are correct. Thank You!!! :)
Monday, October 29, 2012 at 2:31pm

Math Statistics
The table below shows Rico’s grades during the third term in four subjects. Subject Units Grade Math 1.5 98 Science 2 97 English 1.5 95 A.P. 1 99 What was Rico’s average grade in the four subjects?
Friday, October 19, 2012 at 11:30pm

Statistic
Number of Absences Final Grade 0 93 1 93 2 77 3 68 4 65 5 54 - Find the correlation coefficient for the data. I got this part of my answer. I believe the answer to be -0.9767 I am just going crazy with the second part. - Find the equation for the regression line for the data, ...
Thursday, October 18, 2012 at 9:18pm

math
The principal is choosing between 2 field tripS. The firt costs 600 dollars. The 2nd costs $240 plus $40 per students. For wat # of students is the 1trip less expensive?
Tuesday, October 16, 2012 at 10:18pm

English ms. sue
ms. sue for the book catcher in the rye i am being ackley describing holden, and i choose the 2nd incident when holden goes to ackleys room that one night after getting socked from stradlater. i not know what be a good title for this creative writing thing?
Sunday, October 14, 2012 at 5:54pm

4 grade math
what the rule for 58,-2
Sunday, October 14, 2012 at 4:50pm

c++
Your Mathematic school teacher want to use a program that can read the name and the mark of a student. Your teacher want the program to automatically find the grade of the mark and display the result(name, mark and grade). Help your teacher to develop a program that can solve ...
Thursday, October 11, 2012 at 5:16am

Linear Algebra
1. Considering 2 planes with equations: x + 2y - 3z = 1 x + 2y - 3z = 18 (a) Given (a,b,c) a point on the first plane, find the point where the line perpendicular to both planes passes by (a,b,c) and through the 2nd plane.
Wednesday, October 10, 2012 at 10:42pm

Linear Algebra
1. Considering 2 planes with equations: x + 2y - 3z = 1 x + 2y - 3z = 18 (a) Given (a,b,c) a point on the first plane, find the point where the line perpendicular to both planes passes by (a,b,c) and through the 2nd plane.
Wednesday, October 10, 2012 at 12:15am

7th Grade x y input output tables
i need help with x and y input output tables for 7th grade i dont understand what 5x means or what to do! Math hw problems: 1. y=4x+3 x=1,2,5,10,20 2.d=3.5t t=1,2,5,10,20 Please help ASAP!!!!!
Tuesday, October 9, 2012 at 7:14pm

English
I'm a 7 Letter Words, You Read me daily, My 5, 6, 7th Letter increases every Year. 3rd and 4th Letter are the Same. My 3rd, 2nd and 5th Letter Covers 75% of the World. What am i?.
Saturday, October 6, 2012 at 4:03am

statistics
You are given the following data. Number of Absences Final Grade 0 95 1 91 2 82 3 69 4 67 5 58 - Find the correlation coefficient for the data. - Find the equation for the regression line for the data, and predict the final grade of a student who misses 3.5 days.
Thursday, October 4, 2012 at 11:05am

Intergated chemistry/physics
A 10 pound bowling ball with a speed of 2.0 meters/second hits a 6 pound bowling ball. If the 10 pound bowling ball stops after the collision, what is the resulting speed of the 2nd ball in meters/second
Thursday, October 4, 2012 at 9:34am

7th grade math help quick
11/12 + (-2/3) = ?
Wednesday, October 3, 2012 at 8:42pm

math
there are 15 boys and 18 girls in fifth grade. Find the ratio of boys to girls in fifth grade.(how do I get the answer) can someone show me how to work the problem
Monday, October 1, 2012 at 8:52pm

MATH
tHERE ARE 4 FIFTH GRADE CLASSES IN A SCHOOL. EACH CLASS Has 24 STUDENTS. fOR EACH GYM PERIOD, TWO FIFTH GRADE CLASSES TAKE GYM TOGETHER. tHERE ARE 10 GYM PERIODS IN ALL DURING SCHOOL WEEK. wHAT INFORMATION IS NOR NEEDED TO FIGURE OUT HOW MANY TOTAL STUDENTS TAKE A GYM PERIOD ...
Monday, October 1, 2012 at 8:01pm

math
5th grade equstions
Tuesday, September 25, 2012 at 9:04pm

math
an object released from rest will fall 16t^2 feet, t seconds after it is dropped. 2 pebbles are dropped, one after the other, from a cliff that is 64 feet high. the 2nd pebble is released the instant the first pebble has fallen exactly one foot. how far above the ground is the...
Monday, September 24, 2012 at 4:09pm

6th grade math
what does the |#| mean? Thanks
Sunday, September 23, 2012 at 10:29pm

6th grade math
Simplify: |15|
Sunday, September 23, 2012 at 10:23pm

Physics
A) Gravity pulls an area of wet soil and rock downward in a landslide B) An ... Many people know that the weight of an object varies on different planets, but did ... If the Earth's gravitational force causes a falling 74 kg student to accelerate .... the acceleration of ...
Sunday, September 23, 2012 at 1:00pm

Chemistry- rate laws
CH3CHO decomposes into methane gas and carbon monoxide gas. This is a 2nd order reaction. Rate of decomposition at 140 degrees Celsius is .10M/s when the concentration of CH3CHO is .010. What is the rate of the reaction when the concentration of CH3CHO is .50M? Have not been ...
Tuesday, September 18, 2012 at 10:18am

6th grade math
Yes I am not smarter than a 6th grader. How do I show the math and in the simplest form for the following: A sixth grade class has 100 sheets of lightweight paper. They use 3/4 of the paper for a collection of class poems. What is the total thickness of the paper they use?
Monday, September 17, 2012 at 7:27pm

7th grade math
What is the difference? |-9| - |13| =? A)-22 B)-4 C)4 D)22
Sunday, September 16, 2012 at 4:49pm

6th grade math
9 + x = 17 I know that x=8 but how did you get it Thanks
Friday, September 14, 2012 at 6:24pm

7th Grade Math
(-13) + (-1)
Friday, September 14, 2012 at 9:41am

6th grade math
f + (–15) = –32
Tuesday, September 11, 2012 at 12:06pm

math
I'm in sixth grade What is the value of |–46| ?
Monday, September 10, 2012 at 12:57pm

math
y – (–19) = 25 i'm in sixth grade
Monday, September 10, 2012 at 12:45pm

Math 8R - HW Qs. Check
Topic - Logic In the clues below, each variable represent a different digit ranging from 0-9. Determine what digit each variable represent g+g+g = d (3+3+3 = 9) j+e = j (2+0 = 2) g (to the 3rd power) = d (3, to the 2nd power = 9) b+9 = d (6+3 = 9) f-b = c (7-6 = 1) i+h = a ...
Sunday, September 9, 2012 at 4:35pm

Math 8R - HW Qs. Check
Topic - Logic In the clues below, each variable represent a different digit ranging from 0-9. Determine what digit each variable represent g+g+g = d (3+3+3 = 9) j+e = j (2+0 = 2) g (to the 3rd power) = d (3, to the 2nd power = 9) b+9 = d (6+3 = 9) f-b = c (7-6 = 1) i+h = a ...
Sunday, September 9, 2012 at 2:04pm

Math
A year on Mars is 686 Earth Days. (1) Which is longer, a year on Mars or a year on Earth? (2)By how many weeks is it longer? Submit two answers. Please explain how you got the answers. My 1st answer was Mars the 2nd answer I 82 1/2 weeks. Please help
Wednesday, September 5, 2012 at 10:59am

7th grade math
-6(2r-4)
Tuesday, September 4, 2012 at 7:01pm

6th grade math
what is 13/16 minus 1/4?
Tuesday, September 4, 2012 at 5:57pm

Johan
Given angle 1 = (x + 7)degree, angle 2 = *(2x -3)degree, angle ABC = (x 2nd power) degree, angle D = (5x - 4)degree. Show that angle ABC congruent to angle D I can't seem to solve this?
Tuesday, September 4, 2012 at 1:11am

9th grade chemistry
what is the
Monday, September 3, 2012 at 1:09pm

Business and math question
Isabella is hoping to get an A on her college algebra course. With just the final exam left to take, she currently has an average of 92 on her exercises. The quizzes count for 40%, exercises count for30% of the class grade. What is the minimal grade that Isabella must have on ...
Thursday, August 30, 2012 at 2:11pm

Business
Isabella is hoping to get an A on her college Algebra course. With just the finaL exam left to take, she currently has an average of 85 on her quizzes and average of 92 on her exercises. The quizzes count for 40%, exercises count for 30% of the class grade. What is the minimal...
Thursday, August 30, 2012 at 11:07am

algebra
Tony went to the racetrack with $80. He won $15 on the 1st race, lost $12 on the 2nd, lost $6 on the 3rd and won $8 on the 4th. How much money did he have after the 4th race.
Tuesday, August 28, 2012 at 6:58am

Economics
Brian is taking three courses this semester: economics, statistics, and finance. He has decided to spend 19 hours per week studying (in addition to attending all his classes) and his objective is to maximize his average grade, which means maximizing the total of his grades in ...
Monday, August 27, 2012 at 3:29pm

9th grade algebra/Ms Sue
Okay Ms. Sue. I am in 8th grade but I am taking Algebra with 9th graders. I am very confused with my previous problem. I have asked my Dad but we are both getting confused. Now I have come up with 22. Is this my correct answer?
Wednesday, August 22, 2012 at 9:59pm

math
My son is in Kindergarten and I have no idea about the "Counters" in the question: 1st) Cover the teddy bears in the top row with different-color teddy bear counters. 2nd) Color the teddy bears in the bottom row to show the colors." Help. Thanks You.
Tuesday, August 14, 2012 at 8:37pm

Physics
Upon a flat only 10 m high (Is that possible?) there are two guns A and B attached together making a vertical angle of 60 degrees when A is flat on roof. They fire at the same time and has the same reloading time. Both guns are capable of giving an initial velocity of 5√...
Friday, August 10, 2012 at 4:56am

biology
Trophic Level Cylinder Volume of H2O Volume of Oil Total Volume % Oil 1st 1000 ml 1000 ml 2nd 100 ml 100 ml 3rd 10 ml 10 ml
Thursday, August 9, 2012 at 9:37am

chem
three students each measured the boiling point of water at each destination person 1 had boing point of 93.9 c 2nd person found boiling point of 101.1 c 3rd person found boing point of 100.0 c. which student went water skiing in honolulu? which student went to ely, nevada? ...
Monday, July 16, 2012 at 4:43am

math
not sure if this had to do with math but my professor gave us this last hw assignment that i don't understand at all. It has to do with the grade scaling he does. 4x Exams = 37450 HW = 9362 Final = 16385 Lab = 23407 Recitation = 7022 Total Points = 93626 He asks whats the ...
Thursday, July 5, 2012 at 8:35pm

Physics(please check)
Solve for Q Q= sin^-1 1.5/9.8 I got 8.80 Is this correct? I have a TI-30 calculator and to do the sin^-1 I pushed the 2nd button and then sin. I am not sure if this is correct.
Wednesday, June 20, 2012 at 10:31am

physics
A runner covers one lap of a circular track 40.0 m in diameter in 62.5 s. Suppose initially the runner starts by going in the north direction. Assume the speed is constant for the first half-lap and then constant for the 2nd half-lap. Suppose instead the runner ran these same ...
Monday, June 4, 2012 at 5:56pm

Algebra
The final grade for a particular course is calculated by dividing total points earned by total points available. There are 120 points available in the first half of the course, and 140 points in the second half of the course. If a student earns 81% in the first half of the ...
Monday, May 28, 2012 at 12:46pm

11th grade math
-2x+7+9x-4
Thursday, May 24, 2012 at 10:51am

Physics
A 1.2 kg block is attached to a horizontal 23 N/m spring and resting on a frictionless horizontal surface. The block is set oscillating with amplitude 10 cm and phase constant – π/2. A 2nd block with mass 0.8 kg moving at 1.7 m/s collides inelastically (the blocks ...
Thursday, May 24, 2012 at 5:15am

algebra
Let cost = 600.00 fixed costs x = set of tiles $11.00 find the profit equation by substituting your equations for R and C P = R -C THE profit made for 26 and 31 tiles per month. 2nd part; use trail and error to find the quanity of tile sets per month yields the highest profit.
Wednesday, May 23, 2012 at 5:51pm

8 grade
27.6 x 5.2 my answer is 138.00 is this right
Monday, May 21, 2012 at 5:54pm

geometry
in a trivia question ;your team answered 32 out of 40 question correctly. the opposing team answered 16 out of 20 questions correctly. was the ratio of correctly answered quesstions to incorrectly questions the same or different for both teams? explain no they were not same ...
Wednesday, May 16, 2012 at 9:38pm

6 grade math
Can you help me with this integer problem? -8+6+(-10)+(-2)*(-10) is it 8????
Tuesday, May 15, 2012 at 6:17pm

algebra ll
Need help please.. Identify -7x^3+6x^2+6x+9 Searching for the degree of the first term, 2nd term, 3rd term, 4th term and the degree of the polynomial? I thank you
Saturday, May 5, 2012 at 11:13am

statistics
assume adults have an IQ score that are normally distrubted with a mean of 105 and standard deviation of 20 A) find the percentage of adults that have an IQ between 94 and 116 B) find the percentage of adults IQ exceeding 120 C)Determine the 1st, 2nd, and 3rd quartiles for ...
Friday, April 27, 2012 at 5:04pm

Math
After a Math test, each of the twenty-five students in the class got a peek at the teacher's grade sheet. Each student noticed five A's. No student saw all the grades and no student saw his or her own grade. What is the minimum number of students who scored A on the ...
Thursday, April 26, 2012 at 5:24pm

Algebra
help me solve this exponential problem P to the 3rd power times q 5 over 2 all over q to the 2nd power times r to the negative 6.
Tuesday, April 24, 2012 at 2:24pm

physics
3 boys pulling at the end of 3 ropes held together on a knot. one boy pulls with a force of 20 Newton eastward, while a 2nd boy pulls with the same magnitude force northward. in what direction and with what force must a 3rd boy be pulling if his pull of the knot is to be equal...
Wednesday, April 18, 2012 at 6:30am

Physics
Should the wavelengths computed from 2nd order lines be more accurate or more precise than those compute from 1st order lines?
Tuesday, April 17, 2012 at 6:46pm

to ms.sue
thank you. how do you know im in 4th grade?
Tuesday, April 17, 2012 at 6:07pm

Math
Of the 300 tickets 240 were sold to sixth grade studentss What percent of the total number of tickets sold were sold sixth grade students
Saturday, March 31, 2012 at 10:51pm

6th grade math
35/(2+5)(2^3)-15
Wednesday, March 28, 2012 at 9:49pm

Math
Mathew has received $1 the first week, $3 the 2nd week, $5 the 3rd week and so on until he has received a total of $1 000 000. What amount did he receive the last week?
Thursday, March 22, 2012 at 9:46pm

statistics
Calculate the z-score for each set of data. Determine who did better on her respective test, Tonya or Lisa. Student English Test Grade z-Score Student Math Test Grade z-Score John 82 Jim 81 Julie 88 Jordan 85 Samuel 90 Saye 79 Tonya 86 Lisa 82 Mean 86.50 81.75 St. Dev. 3.42 2...
Thursday, March 22, 2012 at 3:03pm

Spanish-2nd answer
¿Qué hace los actores en la ópera de teatro? Los actores juegan unos papeles en la obra de teatro. ¿Qué pasa hacer la semana próxima? Voy a la escuela la semana próxima ¿Qué hiciste la semana pasada? Hice mi tarea ...
Tuesday, March 13, 2012 at 10:01am

4th grade math
what is 5/6 of 288
Monday, March 12, 2012 at 3:20pm

4th grade math
what is 5/6 of 288
Monday, March 12, 2012 at 2:50pm

Chemistry
h2c4h4o4 + 2naoh --> 2h2o + na2c4h4o4 as for the previous question im sorry i forgot to plug the maleic acid in the formula properly. so this ones it ^ .2213 of c4h4o4 used (maleic acid) and .1 M NaOH 1. show the equation for 1st and 2nd ionization 2. find molecular mass of...
Monday, March 12, 2012 at 1:59am

Math - HELP !
there are 50 students in the seventh grade , 62 percent of these students are involved in the drama club.how many seventh grade students are in the drama club ?
Saturday, March 10, 2012 at 11:15pm

1st grade
I am helping my little sister. SHe is in the first grade and learning about Abraham Lincoln. Her questions are- 1. What year was Abe president. What year did he die. 2. How old was he when he died? 3. When did he marry ____. Who did he marry. 4. Who made the first flag? 5. ...
Friday, March 9, 2012 at 1:55pm

Math
ln [5.01E-3] = ln(4.86E-2) - (1.80E-2s-1)(t s) Solve for t. t = 126 s First I did 4.86e-2 - 1.80e-2 and then on my calculator I pressed the 2nd button and then ln and got 1.031. Then I did the same thing to get the ln of 5.01e-3 and divided that by 1.031 but did not get 126 as...
Thursday, March 8, 2012 at 3:21pm

6th Grade History
What is the crucifixion?
Monday, March 5, 2012 at 3:46pm

Math for the middle school and elementary teacher
A prof. teaches 2 calc. classes. The first class has 25 students and their mean on the 1st test was an 82. The 2nd class has 15 students and their mean on the same test was a 74. What is the mean on this test if the prof. combines the score for both classes? Is the answer the ...
Tuesday, February 28, 2012 at 8:55pm

4th grade
8+4
Tuesday, February 28, 2012 at 9:20am

stats
20. The sponsor of a local soccer tournament is responsible for writing an article for the local paper announcing the 151, 2nd, and3rdplacewinners. If10teamsareinvitedtothe tournament, and the sponsor wanted to get the article written in advance so it can go out in the next ...
Sunday, February 26, 2012 at 6:19pm

arithmetic
An arithmetic n geometric sequence have the same first term 2.with the 2nd term x. the sum of the 3rd term of the AS is equal to the 3rd term of the GS. Give the first 3 terms of both sequences.
Sunday, February 26, 2012 at 5:32pm

statistics
12. A statistics student received a grade of 85 on a statistics midterm. If the corresponding z score equaled +1.50, and the standard deviation equaled 7, what was the average grade on this exam? a. 95.5 b. 74.5 c. 78.0 d. Cannot determine without knowing how many took the ...
Sunday, February 26, 2012 at 3:08pm

stats
The sponosor of a local soccer tournament is responsible for writting an article for the local paper announcing the 1st, 2nd, 3rd place winners.If 10 teamsare invited to the tournament, ans th sponsor wanted to get the article written in adance so it can go out in the next ...
Monday, February 20, 2012 at 9:42pm

physics helpppp!!
The 2nd harmonic of a string of length 40cm and linear mass density 1.11g.m has the same frequency as the 5th resonance mode of a closed pipe of length 1.4m. Find the tension in the string. use 340 for speed of sound
Thursday, February 16, 2012 at 3:25pm

statistics
2. The grades on a statistics midterm exam were normally distributed with a mean of 72 and a standard deviation of 8. a. What is the proportion of students received a B grade. b. What is the proportion of students that failed the exam? c. What is the grade of the 92nd ...
Thursday, February 16, 2012 at 6:49am

emergency physics
The 2nd harmonic of a string of length 40cm and linear mass density 1.11g.m has the same frequency as the 5th resonance mode of a closed pipe of length 1.4m. Find the tension in the string. use 340 for speed of sound
Wednesday, February 15, 2012 at 9:07pm

physics
(ignore the other question i posted this is the right one) A rocket has a pre-ignition mass of 1100kg. On ignition it burns fuel at rate of 20kg s-1 producing a thrust of 10000N. How long after ignition of the fuel, will the rocket lift off? also explain how is it possible for...
Wednesday, February 15, 2012 at 5:04pm

physics
A rocket has a per-ignition mass of 1100kgs-1 producing a thrust of 10000N. How long after ignition of the fuel will the rocket lift off? also explain how is it possible for a rocket to accelerate in space. (i cant work it outt. i know it involves the rocket thrust equation ...
Wednesday, February 15, 2012 at 5:01pm

math for elementry school teacher
Step 1st: 1 Box Step 2nd: 3 Boxes Step 3rd: 6 Boxes How many boxes in the 354th version? How many in the nth version?
Sunday, February 5, 2012 at 7:18pm

Physics (Wave Force)
An archer must exert a force of 445 N on the bowstring shown in Figure (a) such that the string makes an angle of è = 34.0° with the vertical. (a) Determine the tension in the bowstring. _____________________________________ My answer was 420.525, but it is within ...
Friday, January 27, 2012 at 11:03am

6th grade math
how to solve w/3=17
Sunday, January 22, 2012 at 9:30pm

math
in 2nd year Adam owed $ 977.53, in the 3rd year he owed $ 1036.18 and in the 4th year he owed $1098.35 how much was the loan originally, and determine the future value of the loan after 10 years
Thursday, January 19, 2012 at 10:43pm

6th grade math
1/4 * 1/2 =4D
Monday, January 16, 2012 at 6:46pm

5 th grade algebra
5a-a-2a=18
Saturday, January 14, 2012 at 10:17pm

Psychology
This is part of a paper I am writing.....I need to write about this, however I am confused by the 2nd part of the question. What do you think they are looking for when they state how are we influenced by emotion, framing and narratives? What attributes are inherent in ...
Tuesday, January 10, 2012 at 3:47pm

math
Sorry, Reiny, I copied the 2nd choice incorrectly. I had posted this problem with you before and the answer given that was not equalalent to A=1/2/bh was 2b =A/h. The problem is: A = 1/2bh, which is not equivalent? Choices: 2A =bh, h=2A/b, 2b=A/h, b=2A/h When I got my test ...
Tuesday, January 10, 2012 at 11:15am

ap calculus ab
for f(x)=lnx we know that f(e)=1. Use the tangent line at(e,1) to compute the tangent line approximation of f(3). what does the difference between the actual value and the tangent line approximation have to do with the concavity (2nd derivative) of the function at (e,1)?
Sunday, January 8, 2012 at 4:43pm

Question
I'M CURIOS SO DON'T JUST JUDGE ME AND BE RUDE i'M REALLY CURIOUS AND i FORGOT TO ASKED THIS QUESTION. DO NOT JUDGE ME!!!! Do I start taking SAT's and ACT's in grade 10th or 11th/12th grade???? I'm really curious.
Friday, December 30, 2011 at 12:29pm

Statistics
2. You are given the following data. Number of Absences Final Grade 0 93 1 90 2 79 3 66 4 60 5 56 - Find the correlation coefficient for the data. - Find the equation for the regression line for the data, and predict the final grade of a student who misses 3.5 days. Show all ...
Friday, December 30, 2011 at 12:31am

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