Thursday

May 5, 2016
Total # Posts: 998

**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*

**math**

x + y =90 x-y = 18 Add the two equations together which will eliminate y. Solve for x and then substitute the value for x into the first equation to find y. check the x and y values in both equations to be sure you are correct.
*February 13, 2013*

**Math**

If the floor has an area of 52, it must be in square yards. To find how much she needs multiply 52 times 3/4 since she only wants to cover 3/4 of the floor. Now, is there a second part of the question asking for how many pieces of 4 square yards does she need? If so, they ...
*February 13, 2013*

**math**

degree 4 begins with x^4 trinomial means 3 terms so you can add two more terms. It doesn't matter if it is x^3, x^2, or x or a constant. With a greatest common factor of 1 means that the the coefficients should be written in such a way that they don't have a factor in ...
*February 13, 2013*

**math**

You need to use the order of operations here which is a little difficult given how we have to write the math at this site. I am understanding that 20(-2-3) is the numerator which would be 20(-5) or -100 The denominator is -3[4 -(-2)] - 4(-3) -3 [4+2] -4(-3) -3(6) -4(-3) -18 + ...
*February 13, 2013*

**math**

in 2 hours the car will travel 200 km. 15 minutes/60 minutes in an hour = 1/4 hour so multiply 1/4 times 200 Can you finish from here?
*February 13, 2013*