# Posts by JJ

Total # Posts: 1,046

**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*

**Math Probability**

rolling a die with 1 - 6 on each side. then rolling another die There are 36 possible outcomes. When will you get an 11 or great 5-6 or 6-5 or 6-6 That is 3 chances out of 36. Can you finish the problem from here?

*February 13, 2013*

**Statistics**

Usually, the rule is to go to the 4th place and it is 5 or higher round up. The answer would be .206 There is also another rule that says to round up when there is a 5 only if the answer will be even. Again, .206 would be the answer. Using either rule we get .206

*February 13, 2013*

**Math**

There are 16 cookies in the jar, Since there are 4 choc chips you have 4/16 or 1/4 to get a choc chip You have to multiply 1/4 times the chance of getting a second choc. chip. Since you aren't replacing, you now have 3/15 chances since you have to assume you got the choc. ...

*February 13, 2013*

**math**

Suppose you used 2 cups every time you ate pancakes, you would divide 48 cups by the 2 cups. Right? This is a division problem you will divide 48 by 2/3 which is the same thing as multiplying by 3/2, so you will multiply 48 times 3/2 Since you are using less than 1 cup each ...

*February 13, 2013*

**Algebra 2**

your divisior is -6 your dividend is: 1 3 -28 -62 You bring down the 1 and multiply by -6 3 -28 -62 1 -6 Then you bring down the -3 and multiply by -16 compane the 48 with the -28, etc. can you do the rest from here? You reassign the variables starting with x^2, x, constant ...

*February 13, 2013*

**statistics**

25/125 gives the percentage that may be bad. Multiply that % times the 350 batteries.

*February 13, 2013*

**statistics**

95% confidence interval indicates that you have 5% outside the confidence interval and 2.5% on either side. This is an area of .025. You can use a calculator or a t-table to find the critical value. Multiply that value times the standard deviation. add this value to the mean ...

*February 13, 2013*

**math**

Multiply (2y+7)(2y+7) It is fine to divide both sides by 3 first, that will make the numbers a little smaller. You will have (2y+7)(2y+7) = 27 After multiplying, you should have 3 terms = 27. Subtract the 27 from both sides so that you will have a trinomial = 0. You can then ...

*February 13, 2013*

**math**

first leg = x second leg = x/2 plus 3 area of a triangle is 1/2 times bh 54 = 1/2 times ((x) times ( x/2 + 3)) Can you finish from here?

*February 13, 2013*

**algebra**

I am not sure what the problem is exactly. the second row is confusing me.

*February 13, 2013*

**algebra**

What is the question? Is it how many do you have to make per hour to finish in time? If so 400 - 225 = ? then divide that answer by the 2 hours.

*February 13, 2013*

**Math**

Marshal sleeps 8 hours each day how many hours does Marshal sleep in one week

*February 12, 2013*

**english**

and wat is the best way to arrange our steps for using the tool

*February 12, 2013*

**english**

how do u find a subject for writng instuctions for using a tool

*February 12, 2013*

**math**

Multiply each possible prize times the chance of winning and add them all up. compare that number with $1 to find your expected gain or loss. If the number is larger, you have a gain. If the number is smaller, you have a loss.

*February 11, 2013*

**Math**

Your first step is to use the Addition Property to get the variables on the same side of the equation.. If you mean something like 4x + 5 = 6x Add -4x to both sides: 5 = 2x then solve for x.

*February 11, 2013*

**math**

Let x = cost of each shirt let y = cost of each pair of pants 4x+3y = $85.50 3x + 5y = $115.00 You can use the Addition/Elimination method to solve this problem. You have to eliminate one of the variables. You can multiply the top equation by -3 and the second equation by 4. ...

*February 11, 2013*

**Math**

Somone just asked this question. Look down in the frequent posts with JJ's answer. If you can't find it. Remember there are 7 days in a week and 24 hours in one day.

*February 11, 2013*

**Math**

3 times 2 doesn't equal 5 is another way to say it.

*February 11, 2013*

**Math**

Sounds like a right triangle. use c^2 = a^2 + b^2 c = 20 a = 3x b = 4x 400 = 9x^2+ 16x^2 solve for x^2 and then take the square root to find x. Multiply this value times the 3 to find one side times the 4 to find the other side.

*February 11, 2013*

**3rd grade math**

You have to add 1/3 and 1/5. You need to get a common denominator of 15. after you add the fractions, subtract from 1 for 1 whole pie. (You can write 1 as 15/15). compare your answer with 1/2 to see if it is larger or smaller. (It is always good to be sure the denominators are...

*February 11, 2013*

**Chemistry**

I am agreeing with you a negative delta H should be an exothermic reaction.

*February 11, 2013*

**Math**

8 hours times 7 days in a week. Is how long he sleeps 24 hours times 7 days = is the number of hours in a week. subtract the sleep time from the total to get hours awake.

*February 11, 2013*

**math**

Shirts white and blue - 2 choices brown, black , jeans pants - 3 choices cashmere coat and a windheater - 2 choices You have 2 times 3 times 2

*February 11, 2013*

**math**

sorry!!!! I didn't read the question carefully.

*February 11, 2013*

**math**

36 - 12 = 24 find the percent of 24/36 You will get a decimal and then have to move it to places to the right to get the answer as a %.

*February 11, 2013*

**Math**

The tennis team has 2 players and the Basketball team has 5 players. Is 5 = 3 x 2 ??

*February 11, 2013*

**math**

2 is in the hundredth place so it can be written as 2 x 10^-2 6 is in the thousandth place so it can be written as 6 x 10^-3

*February 11, 2013*

**Calculus**

n = 0 then A(n) = 1 n = 1 then A(n) = -1 n = 2 then A(n) = 1 n = 3 then A(n) = -1 The graph will continue from 1 to -1 indefinitely. The same thing will happen for n<0.

*February 11, 2013*

**Physical Science Help!**

2NO + O2 ---?? NO2 I started this one for you.. What goes in front of the NO2? Second equation On the left you have You have 4 N's 4 H's 2H's or 6 H's 1 Cl 1 Ca 2 O On the right you have 1 Ca 2 Cl 1 N 3 H and 2 H = 5 H 1 O Start by trying to balance the Cl.

*February 11, 2013*

**STATISTICS**

You have to find the z-score. 65-50 = 15 then divide by 10 which is z = 1.5 You can then use a z-table or a stat calculator to find the probablity less than 65% Depending on the table, you may want to find the probability of z = 1.5 or greater and then subtract that number ...

*February 11, 2013*

**English**

1) sounds okay 2) doesn't sound natural

*February 11, 2013*

**Math Word Problem**

Let x = the amount of $2/lb nuts Let y = the amount of the $4/lb nuts He buys triple of x amount so 3y = x This is similar to the first problem you posted. We need to know the value: Our second equation is 2x+ 4y = 32 You can complete this one just like the previous one that ...

*February 11, 2013*

**MATH**

Let F = number of Flashlights Let S = number of Sleeping Bags F = 3S since the number of flashlights is three times the number of sleeping bags. The value of the flashlighs is 12F The value of the sleeping bags is 45S The two equations are: F = 3S 12F + 45S = 1215 Substitute ...

*February 11, 2013*

**Chem**

Protons have a mass of about 1 and a + charge of 1. It seems like you would need approx. 3.5 protons. Any one else's comment would be appreciated.

*February 11, 2013*

**Algebra**

reply. If yo had -3x, the monomial would be degree 1. -3 just has a degree of zero because x^0 = 1 and 1 times -3 = -3

*February 11, 2013*

**math**

5 factorial means 5 times 4 times 3 times 2 times 1.

*February 11, 2013*

**Statistics- HELP!**

900 is the population because that is your total pool. The 35 who receive the survey are the sample. See the key words "random sample" the statistic is the value you get from the results of the survey which is the mean of the satisfaction score. We don't really ...

*February 11, 2013*

**college algebar**

Do you mean x - 2 divided by 6 or x -2/6 I think you probably mean (x-2/6 If that is correct, then multiply each part by 6 and then add 2 to each part. That will leave x in the middle. I call these the "sandwich problem" because x is sandwiched betweent the lower and...

*February 11, 2013*

**Applied Calculus**

The derivative of a constant is 0 The derivative of 340 = 0 The derivative of 340x would be 340 The derivative of 340x^2 would be 680x.

*February 11, 2013*

**bramalea secondary school**

There are 36 possible combinations when you roll a pair of dice. Figure out how many doubles you would have and subtract that from the 36 possible outcomes.

*February 11, 2013*

**Math**

a = b (-d-c)/cd Multiply cd times both sides then distribute the b. acd = -bd-bc add bc to both sides: acd+bc = -bd factor out the c c(ad+b) = -bd Divide both sides by (ad+b) to solve for c.

*February 9, 2013*

**college algebra**

3x-2y = 8 -2y = -3x+8 y = 3/2 -4 slope = 3/2 2y + 3x = -4 2y = -3x -4 y =-3/2 -2 y-intercept = -2 Now use y = mx + b to write your equation

*February 9, 2013*

**math**

Area of a parallelogram is Base times the height. Multiply 5.2 cm times 2.3 cm.

*February 9, 2013*

**stats**

Usually students who study consistently will have a high grade point average. If you graphed this, you would have a graph that is rising to the right and have a strong correlation. Think about not studying and having low grades on the left side of your graph and studying ...

*February 9, 2013*

**statistics**

13 and add 8 = 21 add 8 = 30 and add 8 =38. So, 32 falls between 2 and 3 standard deviations. 40 - 13 = 27, 32 falls within one standard deviation. February is more likely. You could also take 32 -13 =19 and divide by 8 to get z = 2.375 32-40 = -8 divided by 13 to get z = -....

*February 9, 2013*

**math**

You have to move your decimal point two places to the right in the divisor (.06) and the dividend (1.702) so you are actually dividing 170.2 by 6

*February 9, 2013*

**math**

If it is okay to have blue green red and red green blue as a different flag...then you will have 60 possible flags. For the first stripe you have 5 choices, for the second 4 choices and for the last 3 choices = 60 flags. If you cannot have the same colors in a different order ...

*February 9, 2013*

**math**

You have 7 choices for chairman and then 6 choices for vice-chair. So, that gives you 42 possibilities. This is correct because order is important.. Joe and Sam is different from Sam and Joe.

*February 9, 2013*

**math**

The first spot you have 4 choices The second spot you have 3 choices The third spot you have 2 choices The fourth spoty you have 1 choice. 4 times 3 times 2 times 1 = 24 different ways since order matters

*February 9, 2013*

**maths**

Think of 15x^2 - 20x + 8

*February 9, 2013*

**math**

Write in y = mx+b form. 10y = -2x + 10 y = -1/5 (x) + 1 If x = 5, y = 0 If x = 3, y = -3/5 + 1 or 2/5 If x decreases by 2, then y decreases by 2/5 of a unit.

*February 8, 2013*

**MAth**

You have to convert feet to centimeters here. change 102 feet to inches by multiplying by 12. Then convert inches to centimeters. 1 inch = about 2.5 cm, so divide the inches by 2.5 to get centimeters. Then take a ratio with the 12 cm. I think the scale is 40:1.

*February 8, 2013*