Sunday
April 20, 2014

Homework Help: 1st Grade

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Math
The fifth and sixth grades at Oak Street School are having fair.There are 50 students total and 3/5 of the students are fifth grade students.How many fifth grade students are entered in science fair?
Wednesday, September 4, 2013 at 9:49pm

math
The 1st 3 members of a team finished their laps with a mean time of 53 seconds. What mean time do the next 2 members will gine an overall team mean of 50 seconds?
Tuesday, August 27, 2013 at 10:36pm

maths
Calvin stays on the 7th floor in his building. Between each floor, there are exactly 12 stairs. If he starts from the 1st floor and climbs his way up to the 7th floor, how many stairs does he climb?
Wednesday, August 21, 2013 at 11:07am

math help
no; there are 4 choices for the 1st digit, then 3, then 2, so 4*3*2 = 24 Start with the greatest number of choices and work down. You don't have to end at 1. A 3-digit number using the digits 1,3,5,7,9 would have 5*4*3 = 60 ways.
Tuesday, August 13, 2013 at 3:46am

math
Ez stop fast gas sold 10957 worth of gasoline yesterday. Redular grade sold for 2.30 a gallon and premium grade sold for 2.55 a gallon. If the station sold 420 more regular than premium, how many gallons of regular were sold
Monday, August 12, 2013 at 2:12am

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 at 2:58am

algebra
let's eliminate the y's 1st times 7 --> 49x -63y = 91 2nd times 9 -> 81x + 63y = 819 add them: 130x = 910 x = 7 back into 2nd ... 9(7) + 7y = 91 7y = 28 y = 4 x=7 , y = 4
Wednesday, August 7, 2013 at 10:27am

business math
18. E-Z Stop Fast Gas sold $10,957 worth of gasoline yesterday. Regular grade sold for $2.30 a gallon and premium grade sold for $2.55 a gallon. If the station sold 420 more gallons of regular than of premium, how many gallons of regular were sold? (Points : 2)
Thursday, August 1, 2013 at 4:25pm

physics
The 1st ball h=v₀t₁+gt₁²/2 The 2nd ball x=v₀t₂ h = gt₂²/2 t₁<t₂
Monday, July 29, 2013 at 5:52pm

Math
1st one: 5u + 2v = 15 double the 2nd: 6u + 2v = -14 subtract them: -u = 29 u = -29 sub into 2nd: 3(-29) + v = -7 v= -7 + 87 = 80 u = -29 , v = 80
Thursday, July 25, 2013 at 2:15pm

calculus
I have reduced that to a trivial problem. The whole point of this problem is to find out how to solve it, not to get the correct answer, although I know that this is part of the Brilliant competition and the correct answer does matter here, which simply shows that this is a ...
Sunday, July 21, 2013 at 7:11am

School
I need to answer questions about school,(the topic I chose) but I don't get how to list the school options into my answers. It says: For this assignment, research school options available to you. List the top 10 schools from these options based upon your answers to the ...
Tuesday, June 25, 2013 at 12:12pm

math
Jane uses a jar to save her money. She saves $10 from her weekly allowance in the 1st week, $12 in the 2nd week, $14 in the 3rd week, and so on. How much money will she have saved in 10 weeks?
Friday, June 21, 2013 at 9:33am

Calculus
p(2) = 4a + 2b + c = 6 p'(x) = 2ax + b p'(2) = 4a + b = 2 ---> b = 2 - 4a b = 1 - 2a p''(x) = 2a = 3 a = 3/2 b = 2 - 4(3/2) = -4 in 1st equation: 4(3/2) - 8 + c = 6 c = 8
Friday, June 14, 2013 at 8:44pm

math
1st train traveled for 8 hours 2nd train traveled for 2 hours Their distances are the same distance = speed * time If the speed of the slow train is s, 8s = 2(s+162) 6s = 324 s = 54
Monday, June 10, 2013 at 2:56pm

math
at2pma train leaves at 8pm 2nd train leaves at 162miles per hour faster than 1st train 2nd train takes over at10pm what are the speeds of the2 trains
Monday, June 10, 2013 at 2:40pm

compound sentence
1.There was no break between the breakfast and lunch crowds, so Zach's first break was around 2:00. 2.Then he made some notes for the owner, Melanie, who was also the cook on the second shift. I think the compound sentence is the 1st sentence
Monday, June 10, 2013 at 12:01am

Maths
a=9: 999 a=8: 888 889 899 a=7: 777 778 779 788 789 799 a=6: 666 667 668 669 677 678 679 688 689 699 Looks like The number of entries for a=10-9 is the nth triangular number Sum of 1st n triangular numbers is n(n+1)(n+2)/6 for n=9 that is 9*10*11/6 = 165
Sunday, June 9, 2013 at 5:26pm

Biostatistics
Test the potency of a drug on 20 rats. Previous animal show that a 10-mg dose of drug is lethal 5% of the time within 1st 4 hours; of the animals alive at 4 hours, 10% will die in the next 4 hours. What is the probability that 3 or more rats will die in the first 4 hours.
Saturday, June 8, 2013 at 11:40am

chemistry
just try it this way. i am sure u will get it. 1st of all they are vectors which are given for which you need to give direction. They are not asking planes. So u need to use square brackets [ and ] not ( and ). Those are for planes. 2nd thing is that u cannot leave a fraction ...
Monday, June 3, 2013 at 12:53am

Math
Jon bought a car for 20000 and sold it for 30% profit. Then he bought another more expensive car and sold it for 30% loss. Wat was his overall profit or loss? I got 1st 26000 profit Then 18200 loss Overall? I minus them or??
Sunday, June 2, 2013 at 4:21am

statistics
Assume There are N=10C5 ways of randomly choosing 5 horses out of 10. where N=10!/(5!5!)=25 We assume that 1. order does not count, 2. winning probabilities are equal among horses, 3. results are completely random. Then the owner has one chance in 252 that his 5 horses are ...
Sunday, May 26, 2013 at 5:25pm

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 at 10:05am

7th grade math
I taught in a rural school in southwestern Michigan. Mostly I taught middle school English and social studies with an occasional 7th grade math class to keep me on my toes. :-)
Monday, May 20, 2013 at 8:14pm

Technology Skills class???? Grade 9???
I teach an Information Technology course in Grade 9, which may be similar to yours. We develop keyboarding skills, and learn various kinds of computer-related skills. We include everything from using Excel to create spreadsheets with formulae, to using MovieMaker to make our ...
Wednesday, May 15, 2013 at 1:15pm

Informations
Current GPA is your grade average for this year. The cumulative GPA is your grade average since you entered this school.
Tuesday, May 14, 2013 at 6:05pm

maths
what are we doing? solving? keep the first as is: 5x+6y=37 double the second: 4x - 6y = -8 add them 9x = 29 x = 29/9 in the 1st: 5(29/9) + 6y = 37 times 9 145 + 54y = 333 54y = 188 y = 188/54 = 94/27 x = 29/9 , y = 94/27
Tuesday, May 14, 2013 at 3:21pm

PreCalculus
I would use substitution from the 2nd: y = 3 - 9x sub into the 1st 3-9x = 25x^2 + x 25x^2 + 10x - 3 = 0 (5x-1)(5x+3) = 0 x = 1/5 or x = -3/5 if x = 1/5 , y = 3-9(1/5) = 6/5 if x = -3/5 , y = 3 - 9(-3/5) = 42/5
Sunday, May 12, 2013 at 10:51pm

Physics
What are the answers when t=2.2e-16?? And do u have answers for the 4th question? Anonymous, I have the answers for the 1st and 2nd problems, can u tell me the specific questions for whom u want the answers
Sunday, May 12, 2013 at 12:28pm

Math
Two bike riders ride around a circular track, 1st rider completes one round in 12 minutes, the second rider completes a round in 16 minutes. If they start at the same time and fo in the same direction, how many turn before they meet at the same place again.
Thursday, May 9, 2013 at 9:22am

Physics
Estimate the total binding energy for copper. 550 MeV Estimate the energy, in joules, needed to break a 3.0g copper penny into its constituent nucleons. E= in Joules Please help me out I got 1st part I need the Energy in joules am confused please help me out...thanks
Tuesday, May 7, 2013 at 9:49pm

8th Math - Probability
no this is 8th grade math im in 8th grade and this is what were learning
Thursday, May 2, 2013 at 6:40pm

Math
x=Regular Grade y=Premium Grade x(2.30)+y(2.55)=10,957 x=y+420 y+420(2.30)+y(2.55)=10,957 2.30y+966+2.55y=10,957 4.85y+966=10,957 4.85y=9991 y=2,060 Gallons of Premium Grade x=2,060+420 x=2,480 Gallons of Regular Grade Hope this helps :)
Wednesday, May 1, 2013 at 6:36pm

Math
I'm having a hard time coming up with the right equation to solve this one. E-Z Stop Fast Gas sold $10,957 worth of gasoline yesterday. Regular grade sold for $2.30 a gallon and premium grade sold for $2.55 a gallon. If the station sold 420 more gallons of regular than of ...
Wednesday, May 1, 2013 at 5:47pm

Math
A math class has girls and boys in the seventh grade and girls and 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 girls? Write your ...
Wednesday, May 1, 2013 at 11:43am

Pre- Calc
just put the clues into symbols: 4(r+b) = 3w+3 5(b+w) = 8r+13 w = b+5 now substitute for w in the 1st two equations: 4(r+b) = 3(b+5)+3 5(b+b+5) = 8r+13 or, 4r + b = 18 8r - 10b = 12 8r - 10(18-4r) = 12 48r = 192 r = 4 so, b=2 and w=7
Tuesday, April 30, 2013 at 10:46am

Biology
Is 9th grade biology hard? Is it interesting...?? I love life science but I just wondering if 9th grade biology hard??? I'm taking biology next year.
Monday, April 29, 2013 at 7:48pm

Math
Call the digits a,b,c left-to-right a = c/2 b+c = 7 b-a = 1 we see that c=2a, so b+2a=7 b-a=1 subtract to get 3a=6 a=2 Thus c=4 and b=3 R=234 Or, just working with the specs, c must be even, since it can be divided by 2. So, R is one of the forms 1x2 2x4 3x6 4x8 Since the last...
Monday, April 29, 2013 at 2:50pm

algebra1
he drove an average of 50 mph for 6 h for the 1st 4 hours he drove 47 mph what was his speed for the ast 2 hours
Sunday, April 28, 2013 at 3:14pm

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 at 3:25am

algebra1
rate of 1st machine = 20 copies/min rate of 2nd machine = 12 copies/min combined rate = 32 copies/min so to make 1000 copies takes 1000/32 or 31.25 minutes or 31 minutes and 15 seconds
Thursday, April 25, 2013 at 8:40am

?
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 at 5:33pm

6th grade Math
WOW! This looks like algebra, not 6th grade.
Tuesday, April 23, 2013 at 7:09pm

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 at 2:35pm

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 at 11:43am

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 at 10:27am

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 at 10:26am

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 at 10:22am

Math
Ms Perez owns 2 properties in different towns. The 1st property is assessed at $125,000 and has a tax rate of $6.35 per 1000 dollars. The 2nd property has the same assessed value, but is taxed at the rate of $0.00587 per dollar. Derive the solution to the total tax obligation ...
Friday, April 19, 2013 at 11:38pm

Calc
You could just test each answer pair and see which works, but ... just as quick to solve it rewrite in the proper order 2x + 3y = 32 -2x + 11y = 52 just add them: 14y = 84 y = 6 looks like c) let's confirem sub y = 6 into 1st 2x +18 = 32 2x = 14 x = 7 YUP, it is c)
Thursday, April 18, 2013 at 3:04pm

Math
Meagan bought a 3 liter soda and a bag of cups to a party. Each cup holds a volume of 250ml How many cups will be needed for soda 12 Ms.Baggett took a total of 3 hours to grade 120 papers Which of the following can be used to find m the number of minutes Ms.Baggett took to ...
Wednesday, April 17, 2013 at 7:16pm

Mathh :/
1st light: 15 30 45 90 ... 2nd light: 18 36 54 72 90.... ahhh!! So what is 90 minutes from 2:00 am ? another way to look at it ... What is the LCM for 15 and 18 ?
Wednesday, April 17, 2013 at 9:08am

Math
1st one: choose 3 from 20 = C(20,3) = 1140 15. Assigned seats ---> order matters, so permution of 4 = 4x3x2x1 = 24 (you were right) 16. choose 2 from 5 = C(5,2) = 10 (the order you select your jeans does not matter)
Wednesday, April 17, 2013 at 8:37am

math
80% of 50 questions is 40 questions. She got 34 right out of the 1st 40, so she had to get 6 more right in the last 10.
Monday, April 15, 2013 at 2:57pm

U.S/history AP
1- -------.one of the ways that white southerners tried to keep blacks from voting.1st way they did this .This rule said that could only vote if your ancenstor voted in 1860.a.k.a. (MISSISSIPPI Plan). 2---------.as white southerners regained control of their governments they ...
Monday, April 15, 2013 at 2:54pm

Algebra(1st one was typo)
The function f(x)=x^3 +1/4 x −1^4 is a monotonically increasing function, hence it is injective (one-to-one), so its inverse function exists and is well defined. How many points of intersection are there, between the function f(x) and its inverse f^−1 (x) ?
Thursday, April 11, 2013 at 6:42pm

8th Math - Probability
ummmmmmmmmmmm. Haha jkjk. I know the answer, but think about it... what is the point of school, if you ask someone else to do it.... Oh, and by the way, this isn't 8th grade math! This is 7th grade math, I'm just did this quiz and got 100%. Just try next time!! Its not...
Tuesday, April 9, 2013 at 9:05pm

stat probability
An apartment building has the following apartments: 2 bdrm 3 bdrm 4 bdrm 1st floor 7 3 4 2nd floor 9 0 11 3rd floor 8 4 7 If an apartment is selected at random, what is the probability that it is a 2 bedroom apartment on the 3rd floor?
Monday, April 8, 2013 at 7:37pm

FRENCHHHH
conjugue les verbes a limparfait ou au passé compose guillame,quatorze ans,se rapelle son long sejour a l'hopital, quand il receivait la visite des animatuers de docteur clown,La premiere fois, j'ai cru(croire) qu'ils ______ (venir) d'une autre planete! ...
Monday, April 8, 2013 at 12:14pm

LBCC
An apartment building has the following apartments: 2 bdrm 3 bdrm 4 bdrm 1st floor 7 3 4 2nd floor 9 0 11 3rd floor 8 4 7 If an apartment is selected at random, what is the probability that it is a 2 bedroom apartment on the 3rd floor?
Sunday, April 7, 2013 at 11:12pm

English III Love of Life By: Jack London
Love of Life by Jack London I'm really having problems, how to start the body of my essay in this story. Can you give me some hint, how to make the 1st step? thank you :)
Sunday, April 7, 2013 at 9:42am

7th grade math
There are 150 students in 7th grade. After signing up for electives for next year, the counselor posted the following data: Art - 65 students Band - 70 students Theatre - 50 students Not all students signed up for an elective. Display this data using Venn Diagrams. I do not ...
Saturday, April 6, 2013 at 7:24pm

math
1. Remove the 1st parenthesis without changing any of the terms. 2. Since there is a negative sign in front of the 2nd parenthesis, remove it by changing the sign of each term. 3. Combine like-terms.
Friday, April 5, 2013 at 9:05pm

Geometry
1st digit: 9 choices 2nd digit: 9 choices 3rd digit: 8 choices so, 9*9*8
Friday, April 5, 2013 at 12:03am

math
Multiply both sides of the 1st Eq by -2, and multiply both sides of the 2nd Eq by 3. Then add the Eqs. -8u -6v = 2 +9u +6v = 3 U = 5.
Thursday, April 4, 2013 at 6:31pm

math
Multiply both sides of the 1st Eq by -3, and multiply the 2nd Eq by 2. Then add the Eqs. -6s + 9t = 3 +6s - 8t = 0 t = 3.
Thursday, April 4, 2013 at 4:02pm

math
no solutions, or empty set solve both equations for y: y >= -1.5x + 20 y <= -1.5x + 42.5 Same slope with different y-intercepts indicates parallel lines; Graph both, which shows the solution set: solutions for 1st equation are above the line, and solutions for 2nd ...
Thursday, April 4, 2013 at 3:01pm

Chemistry
1st ionization: Li ==> Li^+ + e 2nd ionization: Li^+ ==> Li^2+ + e
Tuesday, April 2, 2013 at 12:33am

Algebra
1st one times 2 6a - 2b = -24 subtract 4a - 2b = 3 2a = -27 a = -27/2 sub into 3a - b + 12 = 0 b = 3a + 12 = 3(-27/2) + 12 = -57/2
Sunday, March 31, 2013 at 9:36pm

physics
After the 1st rebounce the speed is v/2, after the 2nd rebounce – v/4, after the third rebounce –v/8, => m(v/8)²/2=mgh₁ v=sqrt(128gh₁) =141.7 m/s mv²/2=mgh h= v²/2g=141.7²/2•9.8=1024 m
Sunday, March 31, 2013 at 5:46am

Physics
Ok, her position changed over time since the road is curved. The velocity changed since the direction is changing AccelerTion: theres a change in velocity since the direction changes Direction: changed over time Displacement : difference between 1st and final position
Monday, March 25, 2013 at 10:10am

maths-Linear inequations
It is a Mansard-roof-shaped region in the 1st quadrant. Go to wolframalpha.com and enter solve x+ 4y ≤ 24; 3x +y ≤21 ; x+ y ≤9; x≥0 and y≥0
Friday, March 22, 2013 at 3:54pm

Algebra
the problem is the "divisible" divisible by 1/2 means that something is a multiple of 1/2, such as 1,7/2, etc. 2/7 is not divisible by 1/2 Now, for our sequence, one usually states how each successive term is generated, in this case divide by 2 or multiply by 1/2 ...
Thursday, March 21, 2013 at 12:51pm

Algebra-Multiple choice
1. Should be C (IF not, then B) 2. D, if you multiply 1st equation by 2, try subtracting the third equation, and you get 0 = 5 or 0 = -1 3. 2y = 4x 8x-4y=5 -4y = 5-8x 4y = 8x-5 2y = 4x - 5/2 When minus the first equation from this, we get 0 = -5/2 So, A.
Thursday, March 21, 2013 at 9:24am

Math
1st I added 16 plus 64=80. Then I multiplied 80 by TT and got 251.3 The last part should be 251.3 I messed up on the last number. so is 251.3 correct? Thank you for checking my work, I appreciate it.
Saturday, March 16, 2013 at 8:49pm

Math
L = Length of 1st piece. 2(L-2) = Length of 2nd piece. L + 2(L-2) = 8 Ft. 3L - 4 = 8 3L = 12 L = 4 Ft. 2(L-2) = 2(4-2) = 4 Ft.
Wednesday, March 13, 2013 at 9:44pm

math problem
return = 5000(1.25) + 5000(.8) = ... #2 let Amy and Ariel' age be x let Brett and Bart's age be y let Charlene's age be z x+y = 25 x + z = 27 y+z = 20 2nd minus the third x - y = 7 add that to the first 2x = 32 x=16 in the 1st: 16+y = 27 y = 11 in the third: 11+z...
Wednesday, March 13, 2013 at 7:41am

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 at 7:01am

algebra
using substitution: multiply the 2nd by 2 4x + y = 48 y = 48-4x sub into the 1st 3x + 5(48-4x) = 10 3x + 240 - 20x = 10 -17x = -230 x = 230/17 then y = 48-4(230/7) = -104/17
Sunday, March 10, 2013 at 3:15pm

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 at 8:57pm

Physics
Wb = m*g = 40kg * 9.8N/kg = 392 N, = Wt. of the box. P1 = F*d/t = 392 * 1.3/0.7 = 728 J/s = 728 Watts. Wb = 48kg * 9.8N/kg = 470.4 N. P2=470.4 * 0.9/0.6=706. J/s=706Watts. The 1st boy is more powerful.
Tuesday, March 5, 2013 at 7:10pm

Algebra
2 years is 24 six-month periods, so the population doubles 4 times = 2^24 times the original population. 2^24 ~= 10^7 160 ~= 10^2 so the result will be somewhere around 10^9 Looks like the 1st choice.
Monday, March 4, 2013 at 10:22am

Similarity
What is one similarity between 4th grade and 5th grade?
Wednesday, February 27, 2013 at 8:53pm

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 at 8:11pm

Math
graph the data in each table Perimeters of Similar Rectangles x 1 2 3 4 5 P ? ? ? ? ? Graph P 40 30 20 20 0 1 2 3 4 5 6 7 8 9 X Area of Similar Rectangles X 1 2 3 4 5 A ? ? ? ? ? A 40 30 20 10 0 1 2 3 4 5 6 7 8 9 X 1st rectangle is one side x bottom 2x then they pretty much ...
Monday, February 25, 2013 at 8:26pm

Math
take the square of the 1st number & the square root of 2nd number 09+36=75 (81-6=75) 05+04=23 (25-2=23) 08+01=63 (64-1=63) 06+16=32 (36-4) 09+09=78 (81-3) 03+09=6 (9-3=6) 03+81=?? (9-9=0)
Monday, February 25, 2013 at 6:26am

Math
Your problem is not worded properly. The first sentence is incomplete. 1st Jar holds X mL. 2nd Jar holds (2x+4) mLs. X + (2x+4) = 712 mL. 3x + 4 = 712 3x = 712-4 = 708. X = 236 mLs. = Vol. of smaller jar.
Friday, February 22, 2013 at 8:09pm

algebra 2
N = $937.50 M = Month. BAL = N - (M-1)*62.50 Balance at end of: 1st = $937.50 2nd = 875.00 3rd = 812.50 4th = 750.00 5th = 687.50. 12th = $250.00 BAL = 937.50 - (12-1)*62.50 = 250.
Friday, February 22, 2013 at 5:29pm

Math
x = 1st number and y = second number 2x + y = 24 2x - y = 12 Can you finish from here? Add the two equations to eliminate y and solve for x. Then find y. Be sure to check both x and y in both equations to be sure you are correct.
Friday, February 22, 2013 at 12:53pm

Math
1st term = x 2nd term = x-.5 3rd term = x - 2(.5) .... 10th term = x - 9(.5) = x - .45 ... 14th term = x - 13(.5) = x - 6.5 t th term = x - (t-1)(.5) I assume you are studying sequences and series. Do you recognize the arithmetic sequence pattern ?
Tuesday, February 19, 2013 at 9:49am

College Algebra
$400,440 + 845x =1200x $400,440 + 845x = 1199.99x x = # of TVs to get the answer to the second part compare your answer from the 1st to the 2nd.
Monday, February 18, 2013 at 6:30pm

Math
I think you mean that you have 3 raised to a -1 power divided by 3^3. What you do with negative powers is just moved them up or down in the fraction to make the power positive. so, you can move the 3 to the denominator as 3^1 power now combine the 1st power with the 3rd power ...
Monday, February 18, 2013 at 6:18pm

Chemistry
In a given 1st order reaction A ---> products, the initial concentration of A is 0.40 M. What will be the concentration of A after 15 seconds if the half-life of the reaction is 3 seconds? I found the concentration to be 1.25 x 10-2 M But then how do I find the rate ...
Monday, February 18, 2013 at 7:37am

DYNAMICS
A particle travels along a straight line with a velocity v=(12-3t^2) m/s, when t is in seconds. When t=1s, the particle is located 10m to the left of the origin. Determine the accelaration when t=4s, the displacement from t=0 to t=10s, and the distance the particle travels ...
Sunday, February 17, 2013 at 9:00pm

Chemistry
In a given 1st order reaction A ---> products, the initial concentration of A is 0.40 M. What will be the concentration of A after 15 seconds if the half-life of the reaction is 3 seconds?
Sunday, February 17, 2013 at 4:56am

Ms. Sue please.....
Please delete these if you can: 1. "7th grade math Ms. Sue please last questions! Posted by Delilah on Wednesday, February 13, 2013 at 9:40pm." 2. "7th grade math please help Ms. Sue ASAP Posted by Delilah on Wednesday, February 13, 2013 at 9:19pm." 3. &...
Friday, February 15, 2013 at 8:09pm

ALG 2 PLZ PLZ HELP
2) 4x = x - 78 3) b + r = 330 and b = r -14 These could be combinte by replacing the b with r - 14 r - 14 + r= 330 4) A = E + 6 A + E = 32 5) C = 3M C + M = 52 6) n = 1st integer, n + 1 = 2nd and n+2 = the 3rd integer sum is: n + n + 1 + n + 2= 105 7. Consecutive odd or ...
Thursday, February 14, 2013 at 5:02pm

physics
a body moves in a straight line with initial velocity and uniform acceleration.find how far it travels in12s,given that it travel 246m in the 1st 6seconds,and 69m in the last 3seconds.find also the initial velocity.
Wednesday, February 13, 2013 at 5:14pm

physics
a body moves in a straight line with initial velocity and uniform acceleration.find how far it travels in12s,given that it travel 246m in the 1st 6seconds,and 69m in the last 3seconds.find also the initial velocity.
Wednesday, February 13, 2013 at 5:14pm

physics
a body moves in a straight line with initial velocity and uniform acceleration.find how far it travels in12s,given that it travel 246m in the 1st 6seconds,and 69m in the last 3seconds.find also the initial velocity.
Wednesday, February 13, 2013 at 5:13pm

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