Thursday
May 26, 2016

Posts by jj

Total # Posts: 1,003

math
Divide 24 into 80 to give you the number of packages. You will need to round up to get the correct answer. There will be more than 80 pencils, but the teacher will have to buy that number of packages to be sure to have enough.
February 19, 2013

math
I answered this in your post below.
February 19, 2013

Statistics
Population parameter percent of all voters who will vote for the candidate the value of the sample statistic would be 35/150 and this could be used to estimate the population parameter.
February 19, 2013

math
To write an equation you would write: 88 + box = 97 or 88 = 97 - box
February 19, 2013

math
Begin by factoring out the common factor of 2. That leaves x^2 + x - 42 Factor this trinomial Looks like you will be dealing with 6, 7. One is positive and the other is negative. Remember that distance cannot be measured as a negative number.
February 19, 2013

Statistic
You have to find z scores first. 66.2-69.0 then divide by 2.8 77.4 - 69.0 then divide by 2.8 Now, you have to find the area between those two z scores. The empirical rule tells you the % between -3 and 3 standard deviations, between -2 and 2 sds and between -1 and 1 standard ...
February 19, 2013

Math
When comparing fractions, if the denominators are the same.. the larger numerator gives you the larger fraction.
February 19, 2013

Math
You have to get a common denomiator first then you can compare the numerators. Try for a denominator of 24. this means that you have to multiply the top and bottom of the 6/8 fraction by 3. And multiply the 1/3 (top and bottom) by 8.
February 19, 2013

Math
You might want to reduce 2/8 to 1/4 first and 4/6 to 2/3 Now, you are compaing 1/4 and 2/3. Can you do this based on my answers to your other two questions?
February 19, 2013

Math
I think you are missing your second topping. but, the denominators are the same so you can just compare the numerators. Making a picture sometimes helps.
February 19, 2013

math
This is an order of operation question. My Dear Aunt Sally. Multiplication and Division are done first Addition and Subtraction are done second. Otherwise work from left to right. 3 + 7 - 7 + 3 - 3 x 3 3 + 7 - 7 + 3 - 9 Now just combine from left to right.
February 19, 2013

Please help quick
You are working with the sum of two squares that you cannot factor and the difference of 2 squares that can be factored. Perhaps your teacher just wants you to show that one factorization.
February 19, 2013

Algebra
Did you start the problem? You have to begin by factoring.
February 19, 2013

Algebra
The numerator, you have to factor by grouping. Group: (3a^2 + 6ab) + (-a -2b) Take out the common factor in each group and then you should see two identical factors. Write that factor down once and your second factor is what is left over (actually, what you factored out from ...
February 19, 2013

science
I am thinking burning propane in a gas heater. It give off energy. The others seem to be absorbing energy.
February 19, 2013

math
a = 3 b = 29 c = -8.5 You can find the quadratic by a google search. It is sort of hard to write it here.. but here it is in words minus b plus or minus the square root of b-squared -4ac all over 2a. This will give you 2 values for x.
February 19, 2013

Math
I would starb by getting rid of the decimals. Multiply the second equation by 10 5x + 2y = 30 x + y = 9 multiply the bottom equation by -2 5x + 2y = 30 -2x -2y = -18 Add the two equations to get 3x = 12 so x = 4. Find y by substituting into one of the original equations. then ...
February 19, 2013

math
sample sapce r w r g w r w g g r g w You have 1 chance out of 6 to get rg in that order.
February 19, 2013

MATHS!
swimming has 4 choices cycling has 3 choices running has 2 choices 4 x 3 x 2 = 24 possible routines.
February 19, 2013

Statistics
You have to find the z-score for each of the given values. 11.97 - 12 divided by 0.015 will give you a z. Do the same for 11.99. You have to use a z-table or a calculator to find the the probability between those to z-scores. Do the same for part b.
February 19, 2013

algebra
a ratio is just a fraction so it is 22/26 but then reduce your fractions.
February 19, 2013

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.
February 18, 2013

Math
You can graph the line by solving for y: -4y = -3x -8 y = 3/4x + 2 (divided everything by -4) If x = 0 you should get 2 for y if x = 4 you should get 3 + 2 = 5 for y Now, you have two points (0,2) and (4,5) You always should have one more point to be sure your line is correct...
February 18, 2013

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 ...
February 18, 2013

Chemistry
atomic mass unit this is the mass we see listed for the elements in the Periodic Table.
February 18, 2013

Math
We are double and triple posting because the web site is acting up a little.
February 18, 2013

Math
148 drachma is 1 dollar ?? drachma is 10 dollars would you get 1480 drachma Then just divide by the 3 items to get the max per item.
February 18, 2013

MaTH
First you have to put your line into y = mx + b format. 9x - 6y = -3 -6y = -9x -3 y = 9/6 x - 3 y = 3/2 x - 3 Parallel lines have the same slope. m represents you slope. Perpendicular lines have slopes that are negative reciprocals of each. flip the fraction and include the ...
February 18, 2013

Mth
To find the slope of the line, you have to rewrite the equation to solve for y. y = mx + b the m = the slope and the b = y-intercept. 2x -4y = 2 subtract 2x from both sides then divide each term by -4. What you have in front of the x will be your slope. do you need more help ...
February 18, 2013

math
y = 3/4 (0) + 2 = 0 + 2
February 18, 2013

math
There a few ways to do this problem. You could chose values for x and then solve for y. If x = 0, you would have -4y = -8 so y = 2 You need 3 points to graph the line. Try x = 4 and then find y. another way is to put the equation into the form of y = mx + b -4y = -3x - 8 y = 3...
February 18, 2013

math
Is the ? divided by?? If so you are dividing a trinomial by a monomial you just divide each term of the trinomial by the monomial -9x^3 divided by -3x 3x^2 divided by -3x -15x divided by -3x Remember to divide the coefficients (numbers out in front) Then for the x's with ...
February 18, 2013

chemistry
If you increase the N2 or H2 concentrations that is going to force the production of NH3 If you increase the temperature, to maintain equilibrium heat has to be given off. Which means more NH3 If you add pressure you need fewer molecules which again causes the production of ...
February 18, 2013

Algebra 2
let n = 1 which gives you 3(1) + 4 Let n = 2 gives you 3(2)^2 + 4 Continue like this until you have 6 terms.
February 18, 2013

Finite Math
An easy way to do this is to choose a term of 1 year and $1 amount. You can then use the formulas. For the first one: P(1+r/2)^2 let P = 1 and r = .068 Do you know how to set up the second one?
February 18, 2013

math
1. to order the fractions you have to have the same denominator. Use a denomiator of 24. So that means for 3/4, you have to multiply the numerator and the denominator by 6 to get 18/24. Do something similar to the other two fractions. Then you can compare them easily. 2. You ...
February 18, 2013

Earth Science
I bet you can find it by doing a google search.
February 18, 2013

Applied Calculus
The rule is the denominator times the derivative of the numerator minus the numerator times the derivative of the denominator AND then put this answer over the denominator squared. The deriv. of the numerator is 3x^2 and the deriv of the denom. is 2x Can you finish from here?
February 18, 2013

Math
Here is another way to think about it. You could write the equation of the line first in y = mx+b You substitue: 4 = 2(-5) + b 4 +10 = b 14 = b y = 2x + 14 Now let x = some values and solve for y and you will have the points you need to graph the line.
February 18, 2013

Statistics
I just did the test using a TI-83 calculator. I got a t=-2.60 with a p=.026 If you are doing the test... since .026 is smaller than .05, you can reject the null hypothesis. Which means they did gain more weight with B.
February 18, 2013

math
Substitute 5670 for P. and .035 for r. add 1 to .035/2 Square that answer and then multipl by 5670
February 18, 2013

Science-Physics
Initial speed plus the acceleration times the time. 6.61 m/s + 3.46 m/s/s times 3.92 s 6.61 m/s + ____ m/s (fillin the blank with 3.46 times 3.92). The same principle applies, but you will be multiplyint by -3.46 which will result in a decrease in the speed.
February 18, 2013

algebra
If he is trying to make 15% from 15% then he doesn't need any water at all. He can just use the sulfuric acid directly. If they want 10 liters, then he needs 10 liters of the sulfuric acid. But.. is this really the question or did you mistype something?
February 18, 2013

College Algebra
I know how to do this with calculus, but algebraically it starts the same way. L + 2W = 800 L = 800 - 2w A = LW A= (800-2w)w A = 800w - 2w^2 Take the derivative: 800 -4w 800 -4w = 0 to find max. 800 = 4w 200 =w l = 400
February 18, 2013

physics
d = rt 18 = (51.6)(t) Solve for t.
February 18, 2013

physics
a =v/t a = 80/20 = 4 m/sec/sec north
February 18, 2013

math
The second equation can be rewritten as log(x-2y) = 2^5 The first equation is more complicated because you have different bases. You need to chane base 4 to base 2 by using the rule that allows for base changes. Once you do this, you can use the Law of Logs to combine the left...
February 17, 2013

english
Bias means it is one-sided, unfair and trying to make you agree with their opinion. Unbiased means there is no slant to it and they just are reporting facts and you can't really tell the writers position.
February 17, 2013

English
They don't sound correct either.
February 16, 2013

Algebra
Solve for y in each case. Be sure to write the equations in the forms of y = mx+b m = slope. If the slopes are the same, then the lines are parallel.
February 16, 2013

college algebra
(3,1) is the vertex of the parabola. (1,9) and (5,9) y = ax^2 + bx + c Substitue in the point (3,1) 1 = a(9) +b(3) +c Do the same for (1,9) and then again for (5,9) You will have 3 equations and 3 variables. Solve for a, b, c. There is also a formula to find the equation using...
February 16, 2013

Math
Is the calculus? If so, take the derivative of y which would be 4x^3 - 3x^2-2x -1 Let x =1 to find the slope 4-3-2-1 = m = -2 find the value of y when x = 1 You will then have the slope and a point to use to find the equation using y=mx+b
February 16, 2013

math
I agree with A, B,C. is D -3.744 with nothing after it. If so, it is rational.
February 15, 2013

Math algebra
length is L = W + 8 Area is length times width. 560 = (w+8)w 560 = w^2 + 8w 0 = w^2 + 8w - 560 factor to solve for w. (discard negative values) Then substitute to find L. Be sure to check by multiplying to be sure you get the 560 in^2.
February 15, 2013

algebra story problem
I just answered this one above for someone that posted as "college student"
February 15, 2013

math algebra
length is twice the width L = 2W area is length times width. 72 = (2w(w) 72 = 2w^2 divide both sides by 2 to get 36 and then take the square root of 36 to find "w". double that value to find the length. Check by multiplying l times w to see if you get 72.
February 15, 2013

statistics
14 x 13 x 12 x 11x 10 This is the counting principle. This Assumes choosing: ABCDE is different from ACDEB If you really want a combination you can use: 14! divided by the product of 5!times 9! 5! means 5x4x3x2x1 there will be fewer combinations because ABCDE is the same as ...
February 15, 2013

Math
Take the 20th root of each side then subtract 1 from both sides to solve for g.
February 15, 2013

math
AP Calculus.
February 14, 2013

Algebra
No, you are missing the middle term You need 3x(-4) + 3x(-4) = -24x (3x+4)(3x-4) = 9x^2 -16 This is the case where there wouldn't be a middle term.
February 14, 2013

Algebra
Area is length times width (2w+4)(w) Multiply and you will get the polynomial
February 14, 2013

algebra 1
you multiply 25(9/5) a short cut is to divide 25 by 5 first to get 5 and then multiply times 9 to get the 45 and then add the 32
February 14, 2013

Science
Do a google search for Bermuda Triangle. You will find tons of interesting information which will make good questions.
February 14, 2013

Math
Precision is related to how close you are to the exact measurement. You are most accurate with 21/32 inches.
February 14, 2013

business
I think you might be able to google search corporate social marketing.
February 14, 2013

math
< direction means less than. See it looks like a weird l. > is greater than. If you are using a number line, you can just put a colored in circle on the -5 because it is or equal to and then show a line all the way to the left.
February 14, 2013

Math
2x - 1 x = the cost of 1 jar of honey.
February 14, 2013

math
Since half the class scored 91, the median should be around 91. When you average the low scores, especially the 7, it should bring the mean down to be lower than the median.
February 14, 2013

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 ...
February 14, 2013

math
To solve by elimination, you need x and y on the same side of the equation. For the first one, subtract 5y from both sides to get 4x - 5y = 24 For the second one, subtract 4y from both sides to get 5x - 4y = 21 You want to add these two equations to eliminate one variable. You...
February 14, 2013

Math
1/100 divided by 10 is the same as multiplying by 1/10 That would give us 1/1000 which is a thousandth.
February 14, 2013

math
80 photos with 4 per page means she needs 20 pages. Can you finish the problem from here?
February 14, 2013

math
It is correct unless they want the number written as a mixed number and not an improper fraction. You could divide 46 by 15 and that would be 3 with 1/15 left over.
February 14, 2013

statistics
I tend to think it is true since 220/400 is more than 50% and it was a random sample. If a sample is truly random that we can consider it to be representative of the population. If they had asked people coming out of a pizza shop, then I would say no.
February 14, 2013

Algebra 2
a. Since the miles are equal, then you can just average your gas mileage. b. This will be a weighted average. Say you travel 100 miles. 60(30) + 40 (25) = Divide that answer by 100.
February 14, 2013

maths
any equation in the from of y=mx+b, you can find the y-intercept as (0,b). or sometimes, it is just written as b. The equation you gave is in this format. Now, can you find the f-intercept?
February 14, 2013

Math
Volume has 3 measurements - length, width and height that is why we have cubic feet also written as ft^3.
February 14, 2013

Algebra 2
I think there is an error is the statement of the problem. Serena paid $20.20 for 36 folders. Right there you could find out the price of the folders. Should it say $20.20 for 36 folders and ??? rulers??
February 14, 2013

math
Just 500 + 50 will give you the combined speed. a tail wind always adds, while a head wind slows you down.
February 14, 2013

english
can divining be replaced by doubting or realizing
February 14, 2013

Algebra
Then you have to set each factor equal to zero and solve for m. I actually have another way to factor instead of trial and erro. you multiply the 6 times -14 to get -84 Then you think of a two numbers that multiply to =-84 and add up to be -5 They are -12 plus 7 rewrite as 6m^...
February 13, 2013

english
the rest of the sentencer is to fill the cuff with air
February 13, 2013

english
Then, the doctor pumps the rubber ball does the comma go after ball or pumps or after then with a semi colin after ball
February 13, 2013

english
how should this sentence be written: with stethoscope in place, he or she tightens the valve. does the comma go after stethescope or is their no need of comma
February 13, 2013

english
i think i put it out wrong (jacob and jacob was discussing) the argument presented during the debate. the part in the parenthesis is written as jacob and jacob discussed
February 13, 2013

english
(jacob and jacob was discussing) the rgument during the debate. is the underlined corrected as jacob and jacob discussed
February 13, 2013

english
Luis paints with watercolors now, but last year (he used) only oil paints is the underlined correct
February 13, 2013

english
does (any of the students want) to sign up for knitting class this fall is the right way do any of the students want
February 13, 2013

MS Sue
i gave u my answrs r my answes correct
February 13, 2013

MS Sue
can you plz check my english answers
February 13, 2013

english
is it their
February 13, 2013

english
is it indirect object
February 13, 2013

english
ellen brought her (uncle) a picture of the mountains is the parenthesis the subject the direct object indirect object or predicartive nominative
February 13, 2013

englsih
is it adverb clause
February 13, 2013

englsih
we saw nelson (skating in the park) the parenthesis is it idependent clause gerund phrase or adverb clause or noun clause
February 13, 2013

english
is it dependent clause
February 13, 2013

english
(when you get to the corner,) turn right is the parenthesis idependent clause or dependent clause or ajd clause or adverb clause
February 13, 2013

englsih
1.Where are (the aronsons) going for vacation is the underlined a subject direct indirect object or predicate nominative
February 13, 2013

math
Multiply the -9 using the distributive law. -9w + 27 = 8w -8 You have a couple choices here, but I would add 9w to both sides. This cancel with -9w leaving 27 = 17w -8 Add 8 to both sides and then divide both sides by 8 to solve for w. Can you finish from here?
February 13, 2013

math
r = litres of red paint w = litres of white paint r + w = 28 r/w = 2/5 so: 5r = 2w which leads to r = (2/5)(w) Replace r in the first equation with the (2/5)(w) that will give you 7/5 w = 28 Can you finish from here?
February 13, 2013

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