Monday

February 27, 2017
**Algebra I**

to determine whether a given number is a solution of an equation. Problem: Is 5 a solution of 10x-xto the 2nd power = 3x-10? my work: 10(5)-25=25 and 50-25=25 so x is not a solution. right or wrong? Im new at this

*Tuesday, September 9, 2014 by Nancy*

**Bio Chem**

Carbonate is commonly used to buffer household detergent solutions to a pH of 9.0. How many grams on NaHCO3 and how many grans of NA2CO3 are needed to prepare 0.75L of a 100mM solution? The 2nd pKa of carbonic acid is 10.33.

*Thursday, September 4, 2014 by Cassandra*

**statistics**

You want to estimate the difference in grade point averages between two groups of university students to be accurate within 0.2 grade point, with probability approximately equal to 0.95. If the standard deviation of the grade point measurements is approximately equal to 0.6, ...

*Wednesday, August 13, 2014 by Bob*

**statistics**

The trends in international mathematic and science study (TIMSS) in 2007 examined eighth grade proficiency in math and science. The mean mathematics scale score for the sample of eighth grade students in the US was 508.5 with a standard error of 2.83. Construct a 95% ...

*Saturday, August 2, 2014 by Marc*

**math**

how to write 2nd august 2014 in 5letters without numbers

*Friday, August 1, 2014 by small logic*

**programming**

Professor Merlin has asked you to help him. He has 5 students who have taken four tests. He wants a program where he can enter the students name and their four test scores. After entering all 5 students then he wants a grade report printed showing the student name and their ...

*Thursday, July 24, 2014 by Ajit*

**MATH**

if f(x)=x[x] / sin[x] then show that there is no existence of lim f(x) x>0 2nd prob: show lim (tanx-sinx)/x^3 =1/2 x>0

*Friday, July 11, 2014 by ALOKE*

**statistics**

If you are told the mean grade in ECON 2023 is 80 with a standard deviation of 5, what is the probability that if you randomly selected 36 students you would find an average grade of 82 or more? I found the Z-score: 82-80/5 Which gave me .6554 then 1-.6554=.3446 So 34% would ...

*Sunday, July 6, 2014 by Colby*

**What does your overall grade have to be to pass?**

I'm in the eighth grade and mine is 64 percent am I passing?

*Thursday, June 5, 2014 by nonononono*

**Algebra**

Alma can grade a batch of placement exams in 3hr and Kevin can grade a batch in 4hr. if they work together to grade a batch of exams, what percentage of the exams will have been graded by Alma?

*Saturday, May 24, 2014 by Kgk*

**ALGEBRA**

2nd posting - my mistake When will the dependent variable in the equation y= sqrt [x+4-3] equal or exceed 4 â€¢ x ≥ â€“0.17 â€¢ x ≥ 45 ** is it this one? â€¢ x ≥ 48 â€¢ x ≥ 53

*Saturday, May 10, 2014 by Sandra*

**math**

Suppose that you are taking a course that has three exams which count for three-fifths of your grade and a final which counts for two-fifths of your grade. On your first three tests your scores on were 84, 72, and 96. To get an B in the course, you must have an average of at ...

*Friday, May 9, 2014 by anonymous*

**math question**

If jack has a 63% as his grade.If he takes a test worth 9% and got 10/10 what would his grade be then?

*Monday, April 28, 2014 by matt*

**Math**

How many roots does x to the 3rd power -2x to the 2nd power-13x-10=0 have

*Monday, April 21, 2014 by Matthew*

**Patterns and rules unit test 7th grade**

I go to connection acdeamy and I am in the 7th grade regular math Mrs. Janus I just need some help with this test Find the next three terms of the sequence -2,-12,-72,-432... A. -1,728,-6,912,-27,648

*Monday, March 31, 2014 by Kayla Moore*

**Fractions**

Last night 16/28 of the tenth grade girls and 19/30 of the tenth grade boys went to go ice skating. Did a greater fraction of tenth grade girls or boys went ice skating? Prove it.

*Wednesday, March 26, 2014 by Dave*

**Computer**

Home work:- Write a program to read 5 records consists of first name, last name, id and grade. Assign the grade according to the following specifications: 0<g<= 50 F 50<g<=60 D 60< g<= 70 C 70<g<=90 B 90<g <=100 A Use Stringtokenizer and buffering...

*Thursday, March 20, 2014 by Bano*

**algebra**

How would you solve polynomial equation for, a to the 8th power minus a to the 2nd power and b to the 6th power?

*Monday, March 17, 2014 by Amy*

**math**

please solve 100 divided by 5 to the 2nd power times 4 to the 3rd power.

*Sunday, March 16, 2014 by Rose*

**CHEM**

which formula do i use to solve for the rate constant of a 2nd order half life?

*Wednesday, March 12, 2014 by Anonymous*

**physics Sound**

The 2nd harmonic of a string of length 60 cm and linear mass density 1.1 g/m has the same frequency as the 5th resonance mode of a closed pipe of length 0.8 m. Find the tension in the string.

*Sunday, March 2, 2014 by Help please as soon as possible please!!!!*

**MATH**

SIMPLIFY. 4 TO THE 4TH POWER TIMES 4 TO THE 2ND POWER.

*Friday, February 28, 2014 by amber*

**probability**

Given that there were 4 Heads in the first 7 tosses, find the probability that the 2nd Heads occurred at the 4th toss. Give a numerical answer.

*Thursday, February 27, 2014 by jon*

**2nd Math**

My daughter is learning about comparison problems. I would like to know how to write one and solve it.

*Thursday, February 20, 2014 by Duane*

**math**

lenzy has a 77 a c. as a grade. if she fails a test worth 26% 0/22 what will her grade be

*Tuesday, February 18, 2014 by zack*

**Statistics in Psychology**

What research steps must you go through to use the relationship between a personâ€™s intelligence and grade average in high school so that, if you know a personâ€™s IQ, you can more accurately predict the personâ€™s grade average?

*Monday, February 10, 2014 by Annie*

**STATISTICS**

What research steps must you go through to use the relationship between a personâ€™s intelligence and grade average in high school so that, if you know a personâ€™s IQ, you can more accurately predict the personâ€™s grade average?

*Monday, February 10, 2014 by Anonymous1*

**math**

in an AP the 10th term is 54 and 5th term is 4 times the 2nd term . Find the 1st term 'a' and common difference 'd'

*Monday, February 3, 2014 by jomon*

**Math**

I got a couple questions. 1. The quotient of c and 8 2. 16 more the the product of 5 and p 3. 9 less than the sum of x and 5 4. 5x(7+3) 5. 2x(4 to the 2nd power -5) 6. 7(8)-4(8)

*Tuesday, January 28, 2014 by Not Available*

**maths**

The 2nd term in a geometric sequence is -4 and the 5th term is 32

*Tuesday, January 21, 2014 by Awe*

**calculus**

what is the 2nd derivative of: 1-xy = x-y i get (-y-1)/(x-1) for the first the second i know is (-y-1)/(x-1)^2 but i keep getting (0)/(x-1)^2 please show me the steps i should be taking and if possible what i did wrong

*Monday, January 20, 2014 by eric*

**Math - Algebra**

Von's arcade uses 3 different colored tokens for its game machines. For 500, you can purchase any of the following combinations of tokens: 8 gold, 18 silver, and 7 bronze tokens; 8 gold, 14 silver, and 13 bronze tokens; or 16 gold, 6 silver, and 9 bronze tokens. What is the ...

*Saturday, January 4, 2014 by Ashley Kate*

**Algebra 2**

A grocer mixes x kg of Grade A and Y kg of Grade B nuts to get 60 kg of mixed nuts. Write and equation involving x and y to represent this information. The grocer sells all the mixed nuts at 9.00 per kg. He receives the same amount of money as when he sells the Grade A nuts ...

*Thursday, December 5, 2013 by Anonymous*

**Math**

Janice and Patricia each want to buy a new DVD player. They go to the Hot Electronics and find a DVD player for $75. Hot Electronics offers a different payment plan. Janice is going to pay $15 now, and then $7.50 per month. Patricia is going to pay $12.50 per month How much ...

*Monday, November 11, 2013 by Jerald*

**Math**

If I I'm trying to find the average weight of a 2nd grade girl which would be the most effective and why? Mean, Median or Mode? If I'm trying to find the average cost of a home in a city which would be the most effective and why? Mean, Median or Mode? If I'm trying to find the...

*Tuesday, November 5, 2013 by Anonymous*

**Physics**

6)Â TheÂ relationshipÂ betweenÂ forceÂ andÂ accelerationÂ isÂ givenÂ byÂ Newtonâ€™sÂ 2ndÂ Law:Â FnetÂ =Â ma.Â InÂ thisÂ caseÂ thisÂ becomes:Â Â Â Â Â Â Â Â FappÂ â€“Â FfÂ =Â ma.Â Â a.Â RearrangeÂ thisÂ formulaÂ toÂ fitÂ theÂ equationÂ ofÂ aÂ ...

*Wednesday, October 30, 2013 by Al*

**Math**

If my mid-term is worth 15%, and my grade is 100% right now. If I get 0 on the exam, my grade would be 85% right?

*Wednesday, October 23, 2013 by Thom*

**Geometry**

Simplify (6t to the fifth power) with whole expression in parenthesis to the 2nd pwr.

*Thursday, October 10, 2013 by Gelo G*

**Physics/electricity**

In the Bohr model of the hydrogen atom, an electron in the 2nd excited state moves at a speed of 5.48X10^5 m/s in a circular path having a radius of 2.12X10^-10 m. What is the effective current associated with this orbiting electron?

*Sunday, October 6, 2013 by Derrick*

**College Math 45**

Mrs. Brown has 17 children in her first-grade class, and Mr. Lopez has 20 children in his second-grade class. The principal has been asked to select 1 student from one of the classes to appear at a PTA meeting. How many ways can the selection be made?

*Sunday, October 6, 2013 by Anonymous*

**Math**

A 154-pound woman walks at 3.0 mph 0% grade for 5 min, runs at 5.5 mph 5% grade for 32 min. What is her total caloric expenditure?

*Sunday, October 6, 2013 by NM*

**logical reasoning**

how to write 2nd oct 2013 in 6 letters without using numbers

*Thursday, October 3, 2013 by kani*

**Maths**

The 14th term of an Ap is double the 4th term.find the 10th term if the 2nd term is 8

*Wednesday, October 2, 2013 by Hacker*

**programming**

Grades are assigned on the standard 90, 80, 70, 60 scale. You are to write an algorithm which will receive a student name and a percentage grade and display the letter grade to be awarded

*Thursday, September 26, 2013 by Anonymous*

**Grammar Advisor**

Are these correct? I mark my answer with an X. 88. The reason to list all of the preliminary (non-procedural) information in a lesson plan is to be sure have considered each aspect. keep good records for your future needs. be able to communicate clearly with administrators, ...

*Wednesday, September 25, 2013 by William*

**english**

Can someone check my english essay. 700 words. I have English as 2nd language

*Friday, September 20, 2013 by Jon*

**7th Grade**

I just wanna know anyone who's been in 7th grade what do you learn in science mostly throughout the year??

*Monday, September 16, 2013 by Anonymous*

**math 5th grade**

Hunter school has a kindergarten and grades 1 through 6. there are 2 kindergarten and 2 classes in each grade. If the maximum class size is 25, what is the greatest number of students that could be in the school?

*Thursday, September 12, 2013 by lewis*

**Math - Ratios**

In Mrs. Sotomayor's class, the final grade is based on 6 quizzes and 2 exams. If each exam counts for 3 times as much as each of the quizzes, what fraction of the final grade is determined by each exam?

*Tuesday, September 10, 2013 by Venus*

**Intermediate Algebra**

for the polynomial function h(x)=2x to the 4th power-x to the 3rd power+2x to the 2nd power -4x-3 evaluate h(3)

*Saturday, September 7, 2013 by Kimberly*

**Intermediate Algebra**

name the type of polynomial and give its degree for 7x to the 3rd power + 6x to the 2nd power -2=

*Saturday, September 7, 2013 by Kimberly*

**Algebra**

The ages of three brothers are three consecutive even integers. If the sum of the 1st, four times the 2nd, and twice the 3rd is 86, what is the age of the oldest brother?

*Saturday, August 24, 2013 by Yasmen*

**statistics**

1. I took a sample of the grade point averages for students in my class. For 25 students, the standard deviation of grade points was 0.65 and the mean was 2.89. The standard error for the sample was:

*Sunday, August 11, 2013 by CHIMI*

**Calculus-HELP PLZ !!!!**

Find the complete general solution to the 2nd ODE: 9y'' + 9y' - 4y = 0

*Monday, July 22, 2013 by Elyse*

**Calculus**

Find the complete solution to the 2nd ODE: 2y''+3y'+y=t^(2)+3sin(t)

*Thursday, July 18, 2013 by Sara*

**maths**

if tan theta= -13/12 where theta is in 2nd quadrant find remaing trigonometric ratios

*Thursday, June 6, 2013 by sakthi*

**math**

in a geometric sequence the first term is 2. The 3rd term is the sum of the 1st and 2nd term. Find the ratio, and the 2 terms

*Monday, June 3, 2013 by saraah*

**Statistics**

The accompanying data show the number of hours, x, studied for an exam and the grade received, y (y is measured in tens; that is, y = 8 means that the grade, rounded to the nearest 10 points, is 80). x 2 3 3 4 5 5 5 6 6 6 7 7 7 7 8 y 5 5 6 5 6 7 8 6 9 8 7 9 10 8 9 Maple ...

*Sunday, May 26, 2013 by Sue*

**MATH HELP!!**

How many ways can 12 horses in a race come in 1st, 2nd, and 3rd place

*Friday, May 17, 2013 by tariq*

**Physics helpp**

Newtons 2nd law The force of earths gravity is about 10 N downward. Whats the acceleration of a 15kg backpack if lifted with a 15N force??

*Tuesday, May 14, 2013 by Kate*

**maths**

To get an A grade on the test, you need a total score of more than 16 points. One of the students knows the correct answer to 6 of the 20 questions. The rest she guesses at random by tossing a coin (one toss per question,true if heads and false if tails). What is the chance ...

*Saturday, April 27, 2013 by anonymous*

**?**

If there are 56 questions and you miss 10 what would your grade be? Your grade would be a 81.88 I divided 100/56 and got 1.78 than I multiplied how many questions I would get right by 1.78. So 46x1.78=81.88

*Wednesday, April 24, 2013 by Anonymous*

**?**

Let me see if I understand how to find your grade now. So this time if there are 60 questions and you miss 15 your grade would be a 72?

*Tuesday, April 23, 2013 by Anonymous*

**?**

If there's 60 questions on a homework paper and you miss 10 what would your grade be? I forgot how to find out your grade.

*Tuesday, April 23, 2013 by Anonymous*

**statistics**

To get an A grade on the test, you need a total score of more than 16 points. One of the students knows the correct answer to 6 of the 20 questions. The rest she guesses at random by tossing a coin (one toss per question, as in 4B). What is the chance that she gets an A grade ...

*Sunday, April 21, 2013 by AmmanJordan*

**Statistic**

To get an A grade on the test, you need a total score of more than 16 points. One of the students knows the correct answer to 6 of the 20 questions. The rest she guesses at random by tossing a coin (one toss per question, as in 4B). What is the chance that she gets an A grade ...

*Saturday, April 20, 2013 by AmmanJordan*

**science**

To get an A grade on the test, you need a total score of more than 16 points. One of the students knows the correct answer to 6 of the 20 questions. The rest she guesses at random by tossing a coin (one toss per question, as in 4B). What is the chance that she gets an A grade ...

*Saturday, April 20, 2013 by AmmanJordan*

**Geometry**

The grade of a road or a railway road bed is the ratio rise/run, usually expressed as a percent. For example, a railway with a grade of 5% rises 5 ft for every 100 ft of horizontal distance. 1. The Johnstown, Pennsylvania, inclined railway was built as a "lifesaver" after the ...

*Monday, April 15, 2013 by Stacey*

**chemistry**

Please i tried to give this answer on a quiz but it was not accepted. To name this alkane: CH3CH2CH2CHCH3 with a substituent of CH3 on 2nd carbon.

*Thursday, April 11, 2013 by Rashidat*

**Chemistry - DrBob Help!**

Draw product for chlorination of 2methylbutane through a 2nd radical

*Wednesday, April 10, 2013 by Ilya*

**Math**

Factor the trinomial completely. y to the 3rd power minus 14y to the 2nd power plus 48y

*Thursday, April 4, 2013 by ReRe*

**physical science 2nd semester**

what is the reactant in this equation ?2HBr(aq)+ca(OH)2(aq)-->2H2O(i)+CaBr2(aq)

*Tuesday, April 2, 2013 by josh*

**5th grade math**

how do i convert milligrams to grams- i am in fifth grade-easiest way please.

*Thursday, March 28, 2013 by cc*

**English**

Why should grade 8 students have to do volunteer hours to graduate grade 8? Please provide me with atleast 6 points and so I can expand on it. Your help is very much appreciated!:)

*Saturday, March 23, 2013 by bob*

**algebra 2nd try**

I need to simplify this 2/∛49 . I figured it out to be (2∛((49)^2))/49 but the system I added my answer to says this is incorrect. Please help me! Thanks anyone.

*Saturday, March 23, 2013 by sally*

**Math (algerba 1)**

(4 X 10 to the -5th power) to the 2nd power. How would I solve this?

*Wednesday, March 13, 2013 by Katea*

**CHRIST MATH**

Divide 20 into 4 parts which are in AP such that ratio between the product of the 1st part and the 4th part to the 2nd and 3rd part is 2:3 find the AP

*Tuesday, March 12, 2013 by pavithra*

**ALL subjects..**

Hi!! Well,I'm in tenth grade And I was wondering if there are any practice test websites for the 10th grade Test.. I believe Pct? Please!! Help..

*Friday, March 8, 2013 by Unknown*

**help**

can someone help me with the pythagorean theorem? VERY HARD IM IN 7TH GRADE AND THIS IS SOME 7TH GRADE MATH HOMEWORK THAT I NEED HELP WITH!!!!!!!!!!!

*Thursday, March 7, 2013 by juju*

**maths**

The mean grade of 10 students was 72.if 2 of the students with grades of 53,75 are cancelled. What should be the mean grade of the remaining?

*Wednesday, March 6, 2013 by minte*

**Math**

Write the following number in standard form (4X10 4th power)+(3X10 3rd power)+(2X10 2nd power)+(5X1)=

*Tuesday, March 5, 2013 by Joe*

**Urgent**

draw an angle x in the 1st quadrant with sinx=3/5, and an angle y in the 2nd quadrant with cosy=-12/13, then determine the exact value of tan(x+y).

*Friday, March 1, 2013 by Anonymous*

**Similarity**

What is one similarity between 4th grade and 5th grade?

*Wednesday, February 27, 2013 by Celest*

**writing**

For my writing, it has to be a three paragraph essay.I have to include 2 differences and 1 similarity about 4th grade vs. the 5th grade. How do I start my paragraph?

*Wednesday, February 27, 2013 by Celest*

**Trigonometry**

Mountain Descent A road sign at the top of a mountain indicates that for the next 4 miles the grade is 12%. Find the angle of the grade and the change in elevation for a car descending the mountain.

*Monday, February 4, 2013 by AwesomeGuy*

**math**

franklin school has 3 boys for every 4 girls in the fifth grade.there is 140 students in the fifth grade. A. how many are boys and how many are girls??? pleassseee helpppp meeeeee!!!!

*Saturday, February 2, 2013 by wobble it*

**4th grade math**

In helping my 4th grade grandson last night with his math, he had problems like this 93 * 18. I asked what the asterisk meant and he said the teacher said to "figure it out"

*Wednesday, January 30, 2013 by Patricia*

**MATH**

In Marissa's Calculus course, attendance counts for 5% of the grade, quizzes count for 15% of the grade, exams count for 60% of the grade, and the final exam counts for 20% of the grade. Marissa had 100% average for attendance, 93% for quizzes, 82% for exams, and 81% on the ...

*Sunday, January 27, 2013 by Kristina*

**math**

a boat travels at 16 knots 1st leg: 6hr @ S63W 2nd leg: 4hr @ N10E find time and bearing back to port

*Wednesday, January 23, 2013 by Ashley*

**math**

I need to solve this problem. A teacher can grade 25 papers in 4 hours. How many papers can he grade in 6 hours?

*Tuesday, January 22, 2013 by Christina*

**maths**

if sinx=3/5,cosy=12/13,where x and y both lie in 2nd quadrant, find the value of sin(x+y),cos(x-y),tan(x+y)?

*Tuesday, January 15, 2013 by jeethu*

**Statistic- Average**

A mean average of 60 on 6 exams is needed to pass a course. on his first 5 exams, Adam received grades of 46,73,73,63 and 70. If the lowest grade of the exams already taken is to be dropped, what grade must he receive on his last exam to get a C in the Course?

*Monday, January 7, 2013 by tony*

**Geometry**

What is the equation of a line through (-2,5) and whose segment intercepted between the axes in the 2nd quadrant is 7sqrt2? Please help me solve this

*Monday, January 7, 2013 by Lance*

**math**

A mean average of 60 on 7 exams is needed to pass a course. on his first 6 exams, Adam received grades of 46,74,70,59,66 and 72. if his lowest grade of the exams already taken is to be dropped,what grade must he receive on his last exam to pass?

*Monday, January 7, 2013 by tony*

**math**

if 40 percent of my grade is at a 97 percent average and 40 percent of my grade is at a 92 percent average and my final test is worth 20 percent of the grade then what do i have to score on my final test to have a grade of 91.5 percent or better?

*Tuesday, December 18, 2012 by pat*

**Grading**

How do you find out what your grade is on a paper? For example if there is 70 questions and you miss 10 how do you find out what your grade is? Do you subtract 70 and 10 and when you get your answer you divide it by 100?

*Tuesday, December 18, 2012 by Lance*

**Math ave grade**

a student scores 76,82,83 on the first three test, she has a 92 homework averge. if the final exam is 50% of grade and homework is 10% and the test average (nit including the final) is 40% then what grade should she get on the final exam to get a 87.5 in the class?

*Sunday, December 16, 2012 by James*

**math**

-25 plus 4 to the 2nd power times 3 minus 5 to the 3rd power

*Wednesday, December 12, 2012 by naomi*

**5th grade math (word problems)**

I didn't see an answer from yesterday, so resending. Also, is there a website to explain how to solve word problems - like key phrases to look for (ex: 'in all' - add; 'what's left' - subtraction)? Here's question from yesterday: sorry,but I don't understand word problems - ...

*Wednesday, December 12, 2012 by Alex*

**5th grade math (word problems)**

sorry,but I don't understand word problems - like what formula/expression to use. Here's the 1st problem: Rob practiced 3/5 of his music in 25minutes. About how long does it take to practice all of his music? I know that Rob has 2/5 left of music to practice. So, do I multiply...

*Tuesday, December 11, 2012 by Alex*