Monday
April 21, 2014

Homework Help: 2nd 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 10:47pm

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

French
Look again at (ask someone to repair it for you. You gave me an example of the receiver only. Look at the 2nd set of examples, with an agent. THAT is what you need. Je fais réparer mon ordinateur Jacques. = I'm going to have Jack (agent) repair my computer (receiver...
Wednesday, September 4, 2013 at 1:58pm

DISCRETE MATHS
no, the set has 3 elements. the first is p the 2nd is the set {p} the third is the set {p,{p}}
Monday, September 2, 2013 at 12:05pm

Physics
1st week: 1/2 2nd week: 1/4 3rd week: 1/8 ...
Thursday, August 29, 2013 at 2:36pm

Algebra
the area of a triangle can be determined by using the formula A= 1/2bh, where b is the length of the base, and h is the length of the height. Determine the area of a triangle with a base which is 7x to the 2nd power and a height which is 8x feet.
Monday, August 26, 2013 at 6:11pm

Physics !!
Hmmm. 1) If y is the stone's height at t, and h is the building height, I get first stone: y = h - 4.9t^2 2nd stone: y = h - 25(t-2) - 4.9(t-2)^2 i: t = 5.63 the rest is easy...
Monday, August 26, 2013 at 12:40pm

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 at 2:58pm

maths
let the amount he started with be x after first round he has 2x-P in 2nd round he tripled that and gave away 2P so has left 6x - 3P - 2P = 6x - 5P in 3rd round he quadrupled the amount and gave away P so he has left 24x - 20P - P = 24x - 21P amount given away = P + 2P + P = ...
Friday, August 23, 2013 at 8:33am

ENGLISH
How to do this......please show me.... Take 2 A4 sheet.On one write PROPER NOUNS and stick related picture cut outs.On the 2nd sheet write COMMON NOUNS and paste related picture cut outs.
Thursday, August 22, 2013 at 3:55pm

English
Nursery school is for children before the age of kindergarten. Kindergarten is usually for children who are at least 5 years old by a certain date (such as Sept 1st). This grade is preparation for 1st grade and onward. Day care is for children of various ages, not really ...
Tuesday, August 20, 2013 at 4:55am

Math
First, try plotting (-3,1) on a graphing paper. You'll see it's in the 2nd Quadrant. When you reflect it on the y-axis, the new point will be on the third quadrant (where both x & y coordinates are negative). Therefore the new point is at (-3,-1). Hope this helps~ :)
Monday, August 12, 2013 at 11:35pm

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

Math
1st times 4 --> 12x + 16y = 72 2nd as is ----> 12x + 7y = 4 subtract them: 9y = 68 y = 68/9 back in 1st: 3x + 4(68/9) = 18 3x = 18 - 272/9 = -110/9 x = -110/27
Thursday, August 8, 2013 at 8:04am

children who require special treatment
mr.ames is married and has two children.he abuses alcohol.a family therapist would classify mr ames family as have a sick family pattern of a ? a.weak father b.2nd class family c.malevolent mother d.soluble dad my answer is d
Wednesday, August 7, 2013 at 4:53pm

Algebra
if f and g are inverses, f(g(x)) = x f(x) = x+6 f(g) = g+6 = (x+6)+6 = x+12 so, f and g are not inverses. Same for the 2nd part. If f(x) is the same as g(x), they are not inverses unless f(x) = x g(x) = x i think you have some typos in your write-up.
Monday, August 5, 2013 at 7:10pm

Algebra - eh?
what is it you have to solve for? "an inverse function" doesn't help much f -1(x)? g -1(x)? (f◦g) -1(x)? In the 2nd part, do you mean f(x) = 1/(4x) or (1/4)x? and is g the same as f?
Monday, August 5, 2013 at 7:08pm

Stats
Hello Charlotte. Helen told us a lot. I f you have a 2nd account try some different from Helen's. Unofortunately i cant have access on a second account this week..
Monday, August 5, 2013 at 2:59pm

math
No ideas at all? From the problems you have posted, I would think that an algebra I problem like this would be no challenge. solve for x in the 1st, and substitute it into the 2nd. Then solve for 3y.
Saturday, August 3, 2013 at 6:14pm

math
first term --- a common ratio --- r The sum of second term and fourth term of G.P is 30 ---> ar + ar^3 = 30 ar(1 + r^2) = 30 , #1 difference between sixth term and second term is 90 --> ar^5 - ar = 90 ar(r^4 - 1) = 90 , #2 divide #2 by #1 (r^4 - 1)/(1+r^2) = 3 (r^2 + 1)(...
Saturday, August 3, 2013 at 9:05am

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

math
ideal setup for "substitution" 1st into 2nd: 7x + 4(-2x+2) = 7 7x + 8x + 8= 7 -x = -1 x = 1 plug that back into 1st, all done
Friday, July 26, 2013 at 7:20am

BTech, Mechanical
For the 1st ball, the time of the upward motion v=v₀-gt v=0 0=v₀-gt t= v₀/g =18/9.8=1.83 s. The height of the 1st ball h= v₀t-gt²/2=18•1.83 - 9.8•(1.83)²/2= =16.53 m The time of the 1st ball downward motion before the 2nd ball begins...
Monday, July 22, 2013 at 1:44pm

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

physics
v^2=u^2+2as v=final velocity u=initial velocity s=distance covered a=acceleration Substitute the given values in above equation and find a(a will be 2.5m/s^2) Now from the Newton's 2nd law of motion F=ma F=1300*2.5=3250N
Friday, July 19, 2013 at 7:34am

MATH
rotating about the y -axis needs V = π∫x^2 dy first equation: y = x^2 2nd equation: √x = y x = y^2 x^2 = y^4 so V = π∫y dy - π∫y^4 dy = π [ (1/2)y^2 - (1/5)y^5] from y = 0 to 1 = π( 1/2 - 1/5) = (3/10)π
Tuesday, July 9, 2013 at 11:57pm

Excel
Say this is my cell: 2013 *aaron e. pacheco*9743 2nd Avenue*Boca 33431 *pacheco@fau.edu*9049 how would i use the text function to extract the first, middle, and last names from a list of cells like the one above with differing name lengths? and possibly some without middle ...
Tuesday, July 9, 2013 at 10:00pm

algebra1 HELP PLEASE Thanks you!!
h1(t) = -16t^2 + 100 h2(t) = -16t^2 + 210 when ball 1 reaches ground, h1(t) = 0 16t^2 = 100 t^2 = 100/16 t = √(100/16) = 10/4 = 5/2 seconds do the 2nd the same way
Monday, July 8, 2013 at 2:17pm

liberal art math
assuming the 2nd "+" to be "=" (forgot to shift key) and you meant x + 3y = -6 rearrange terms to get y on the left 3y = -x-6 now divide by 3 to get y = -1/3 x - 2 slope is -1/3 intercept is -2
Sunday, July 7, 2013 at 7:35pm

Math
x = 2nd number 4x + x + (x + 9) = 45 6x + 9 = 45 6x = 36 x = 6
Sunday, July 7, 2013 at 7:18pm

College Algebra
no, they are separated vertically. y1 = y2 - 2 To separate horizontally, you need the 2nd x to be 2 less than the first. y1 = (1/3)^x y2 = (1/3)^(x-2) Since the new x-values are 2 less than the old ones, it's as if the y-axis had been shifted 2 units to the right.
Wednesday, June 26, 2013 at 2:59pm

physics
The 2nd person does not matter for this problem. To conserve momentum before and after the throw, (86.6)(2.06) + 0(0.06) = (86.6)(v) + (42.3)(0.06)
Monday, June 24, 2013 at 3:15pm

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

Chemistry
2nd. H2SO3 + 2NaOH ==> Na2SO3 + 2H2O mols H2SO3 = M x L = ? mols NaOH = 2 times mols H2SO3 It takes that many mols NaOH to neutralize BOTH H ions of H2SO3. Then mols NaOH = M x L; you know mols NasOH and M, solve for L NaOH. Take half that volume to find L for the first ...
Friday, June 14, 2013 at 11:19pm

trig
angular velocity: 1st wheel : 2π rad/30 sec = π/15 rad/sec 2nd wheel : 2π radians/15 sec = 2π/15 rad/sec linear velocity 1st wheel: circumference = 2π(20) = 40π ft linear velocity = 40π/30 ft/sec = 4π/3 ft/se 2nd wheel: circumf = 20π...
Tuesday, June 11, 2013 at 6:42pm

math - trig
You know that sinØ = y/r cosØ = x/r tanØ = y/x cscØ = r/y etc so in any point the first coordinate is the x, the 2nd is the y 1. for (-12, -5) you would be in quadrant III x = -12, y = -5 use Pythagoras, x^2 + y^2 = r^2 ( where we keep r always ...
Tuesday, June 11, 2013 at 8:52am

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
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 at 9:12pm

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

SAT math
Since x^2-4x+3 = (x-3)(x-1) and (3-x) is just -(x-3) The LCD is 2(x-3)(x-1) So, TRUE Dunno why they included the "-" in the denominator, but it works with or without it. Similarly, FALSE for the 2nd The wording is poor. You can't have an LCD for "each" ...
Friday, May 31, 2013 at 1:58pm

heeeeeeelp math
I don't remember the formulas or anything, but just thinking about it: for the first guy you have 4 heads X 4 torsos X 4 legs 2nd guy has 3 heads X 3 torsos X 3 legs then 3rd has 2X2X2 last guy has 1X1X1 so 4X4X4X3X3X3X2X2X2X1X1X1 in other words 4X3X2X1X4X3X2X1X4X3X2X1 or...
Thursday, May 30, 2013 at 12:30pm

Math
first one is ok 2nd: 18 yellow of 35 prob of yellow = 18/35 which is equivalent to 1 - 17/35 , or choice C don't understand why they would not simplify that.
Wednesday, May 29, 2013 at 10:29pm

maths
Total = $X. Oldest = $2x/7. 2nd Oldest = 3/5 * 5x/7 = $3x/7. 3rd = $x/7 = $120. 4th = $x/7 = $120. x/7 = 120 X = $840.
Tuesday, May 28, 2013 at 6:49pm

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

Science (2nd Try)
well does the temperature change because time passes, or does time pass because the temperature changes? Looks to me like the temperature depends on time, not the other way around. SO, parsing my convoluted logic, which is independent?
Thursday, May 23, 2013 at 2:55pm

Science (2nd Try)
To determine the boing point of a liquid, a student heats 10 mL of the liquid in a test tube and records the temperature every minute for 20 minutes. In this example, time is the what? The choices are: Independent variable dependent variable hypothesis control Is it dependent ...
Thursday, May 23, 2013 at 12:06pm

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

Algebra 2
second verse, same as the first: y = -x^2, so x^2 - (-x^2 - 12)^2 = 144 x^2 - x^4 - 24x^2 - 144 = 144 x^4 + 23x^2 + 288 = 0 again, the discriminant is negative, so there are no solutions. x=0 works only in the 2nd equation (±12,12) only works in the first equation
Saturday, May 18, 2013 at 11:51am

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

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 at 10:49am

Physics
Thanks a lot Flu for the 4th prob 2nd prob- a) Wavelength= 2*pi/k Frequency= omega/(2*pi)
Sunday, May 12, 2013 at 11:34pm

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
Amazing. 3x-2(3x-2) -3x+6x-4 -3x+4 The answer is correct, but the middle line is just backwards. Expanding the 2nd term, I get 3x-6x+4 I hope the logic carries through on other types of problems. How ever did you arrive at that intermediate step?
Thursday, May 9, 2013 at 10:23am

Calculus AB (AP)
1) d/dx e^(u) is always (u')(e^(u)). In other words, take the original function and multiply it by the derivative of u (f(x)). 2) The 2nd FTC: Take the b (top number of the integral) and plug that in for t. Multiply by the derivative of b. b'(f(b)).
Tuesday, May 7, 2013 at 8:40pm

statistics
just find out how many possibilities there are for each position, and multiply them all together: C(6,4) * C(5,4) * C(3,2) * C(2,1) = 450 If your comment about the 2nd goalkeeper means that he may play as a midfielder or a forward, then things get more complicated.
Tuesday, May 7, 2013 at 4:05pm

statistics
A certain professional soccer team runs a 4-4-2 formation on the field. This means they play with 4 defenders, 4 midfielders, 2 forwards, and 1 goalkeeper on the field. If the team has 6 defenders, 5 midfielders, 3 forwards, and 2 goalkeepers, how many different groups of 11 ...
Tuesday, May 7, 2013 at 3:40pm

propability!!!
A certain professional soccer team runs a 4-4-2 formation on the field. This means they play with 4 defenders, 4 midfielders, 2 forwards, and 1 goalkeeper on the field. If the team has 6 defenders, 5 midfielders, 3 forwards, and 2 goalkeepers, how many different groups of 11 ...
Tuesday, May 7, 2013 at 12:06pm

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

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

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

?
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

algerba 1
1. the sum of 3 numbers is 207. the 2nd # is 8 times the first, while the third is 3 less than the first. find the #s. 2. the sumof 3 numbers is 161. the second number is 6 times the first, and the third is 5 more than the second. find the #s. Thanks so much!
Saturday, April 20, 2013 at 7:27pm

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

Math Geometery
my first rectangle is 3 by 8 , so it has an area of 24 my 2nd rectangle is 6 by 4, so it has an area of 24 Are the perimeters of the two rectangles the same ?
Friday, April 19, 2013 at 3:15pm

Algebra 1
#1 and #3 are the same type of problem. Solve the two equations, once you have the x and y, just perform the required arithmetic. I will do the first you do #3 add the equations: 4x = 12 x = 3 sub back into the 2nd (looks easier) -3 + 3y = 9 3y = 12 y = 4 so x=3, and y = 4, ...
Thursday, April 18, 2013 at 2:48pm

non linear equations
from the 2nd: y = 5x + 25 sub into the first 5x+25 + x^2 = -5x x^2 + 10x + 25 = 0 (x+5)^2 = 0 x+5 = 0 x = -5 then y = 5(-5) + 25 = 0
Wednesday, April 17, 2013 at 11:01pm

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

Trig
First off, you can see that it's 2nd-degree in both x and y, so there is no simple y=f(x) expression. It's the equation of a rotated parabola, so there will be a top branch and a bottom branch. Anyway, express it as a quadratic in y: x^2 - 4xy + 4y^2 - 8y + 2 = 0 4y^2...
Tuesday, April 16, 2013 at 2:15pm

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

Math
Look for a key on your calculator that looks like a power, either yx or perhaps ab enter the following sequence 7 x ( √2) = you should get 15.6728... do the 2nd in the same way
Sunday, April 7, 2013 at 11:25pm

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

adv functions
let x = log8 4 then 8^x = 4 (2^3)^x = 2^2 2^(3x) = 2^2 then 3x = 2 x = 2/3 do the 2nd one the same way, noting that 1/3 = 3^-1 and 27 = 3^3
Sunday, April 7, 2013 at 11:11pm

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

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 at 12:09am

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 at 5:33pm

Algebra (word problems)
Your value of a should be -1 , or else your frog would jump up into space. Assuming he starts at the origin, (I don't have your diagram), the equation would be height = -(x -4.5)^2 + 3 2nd: I am going to place the centre of the doorway at (0,0) so the equation is y = ax^2...
Friday, March 22, 2013 at 5:26pm

Chemistry
D the Keq expression of the 2nd one is = to (1/the first Keq expression)^(1/2) so take the answer of the first Keq, 5.4x10^13 and put it in that equation (1/(5.4x10^13))^(1/2)=1.36x10^-7=1.4x10^​-7
Tuesday, March 19, 2013 at 7:41pm

Algebra
1st one: looks like they are adding 5 , so arithmetic C is correct 2nd: terms would be 15 16.5 18 19.5 ... You are correct again with B
Tuesday, March 19, 2013 at 11:43am

Combinatorics
he has 10 choices for the first ride. Having ridden that one, there are only 9 choices for the 2nd ride, and so on. Taking 3 rides, he has 10*9*8 = 720 ways to pick 'em.
Tuesday, March 19, 2013 at 10:46am

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