Tuesday

July 22, 2014

July 22, 2014

Total # Posts: 918

**math**

x = the number you start with after round 1: you have x/2 1/3 of those are eliminated which means 2/3 remain Multiply x/2 times 2/3 = x/3 Next round 1/4 are eliminated which means that 3/4 remain. 3/4 times x/3 = x/4 Can you finish from here with rounds 5 and 6 it should end w...

**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.

**math**

There are 100 students... and 40 boys. What is the probability of getting a boy? Student wears eye glasses. It looks like 40 wear eye glasses so 40/100 again. I am not sure if the question is two separate problems or they are trying to say .. if you picked a boy and that he we...

**graphing**

I put the numbers in using the stat function of the TI-83. I hit STAT and edit to put in the numbers in L1 and L2. Then I did Stat -Calc and I chose Quadreg and L1 L2 from keyboard and enter.

**graphing**

I am taking a chance at this one. See if you agree or not. (0,0) is the initial starting point (55, 0) is the ending point 24.8 is the max height which occurs 1/2 between 0 and 55 so that gives us another point (27.5, 24.8) I used the quadratic regression on the graphing calcu...

**HISTORY**

Try a google search. I don't see any history tutors online right now. If you can't find anything repost.

**HISTORY**

Try a google search. I don't see any history tutors online right now. If you can't find anything repost.

**Math**

Yes!!

**Math**

You need to multiply all of the exponents by the 1/4 write 81 and 3^4 first then multiply the 4 times 1/4 =1 so you just have 3^1 which is 3. Now, can you do a and b?

**math**

L = 3+ 2W see how I created this equation from the first sentence? 77 = LW I will write this by substituting for L 77 = (3+2w)w 77 = 3w + 2w^2 You want to write this in the form of ax^2 + bx + c= 0 because that will allow you to factor and find the width. You will get two valu...

**math**

this value is given to the nearest cent. To round to the nearest tenth or ten cent would be 114.30 to round to the nearest cent.. I would need something like 114.291 that would round to 114.29

**history**

I bet you could find this in a google search. I don't see a history person online right now. I might guess Mao.

**Math 0098**

See if you can do this one. It is the same idea as what I just helped you with. Work it out and I will be happy to check your answer.

**math**

for C. In 1990, the house is worth 94,000 to double it has to be worth 188,000 Putin 188,00 for P(t) then divide both sides by 94,000. That will give you 2= e^.03t take the ln of both sides then solve for t. Are you in calculus? If so.. for B. I would take the derivative that ...

**math**

15uvw^8 + 30u^5w^9 First you find the GCF. Can you do that with the hints I gave you in the previous question? 15uw is what I think. do you agree? Once you have the GCF. You divide both parts by it (15uw)(vw^7 + 2u^4w^8) Can you do the other two? I will be happy to check your ...

**math**

What is the biggest number that will go into both 18 and 30? Is it 6? the greatest common factor for variables with exponents is the variable with the smallest power. for the u's the gcf would be u^2 for v^5 none because the second expression doesn't have a v. for the ...

**Math**

7x + 29 is correct in the numerator. the denominator will be x^2 + 3x - 10 Your mistake is that you added the denominators. You have to keep the denominator and add the numerators when working with fractions. Like 1/5 + 2/5 = 3/5 this is the same denominator that you have on t...

**Math**

Do you mean 5/(x-2) plus 2/(x+5) = 4/(x^2 + 3x -10) To do this you either need a common denominator or to clear denominators. I have to check the factors of the denomonators. (x^2 + 3x -10) factors to (x+5)(x-2) 5/(x-2) needs to be multiplied by (x+5)/(x+5) 2/(x+5) needs to be...

**non permissable values**

Nonpermissiable values. You only have to worry about the denominators. A denominator can never be equal to zero since division by zero is not defined. If a denominator is x + 2 , we don't want it to equal zero. So, x cannot = -2 sind that will cause the denominator to equa...

**math**

round 1 you start with x and 1/2 are eliminated (x/2) times 1/3 for what is left after round 2. (x/6)times 1/5 times 1/6 Do the math and then set x/? = 10 solve for x.

**Math 0098**

-7x -7y =70000 7x + 9y =86000 2y = 156000 divide by 2 and you get 7800 for y so the other amount must be 2200.

**Math 0098**

Sorry.. the .08 is a typo. It should be .09 Which makes the equation 7x + 9y = 86000

**Math 0098**

x = amount in the first account y = amount in the second account. total invested: x + y = 10,000 since Interest = Principles times rate times time. .07x + .08y = 860 Now, you work with those two equations. I would multiply the bottom equation by 100 to get rid of the decimals....

**Math 0098**

Do you have numbers for this problem?

**Calculus**

The derivative of a product. The rule is: the first times the derivative of the second PLUS the second times the derivative of the first. simplify your answer. The derivative of the first: 4x-2 The derivative of the second -3x^-4 -8x^-5 Can you finish with these hints?

**Algebra II**

Use the slope formula. m = (x2-x1)/(y2-y1) 2 = (2 -1)/(y-3) Multiply (y-3) times each side of the equation. Simplify and solve for y.

**math**

n = ist number n+1 = second number the sum: n + n + 1 or 2n + 1 reciprocal we would want 1/(2n+1) and that should equal 11/30 Set the two fractions equal to each other Cross multiply and then solve for n. then find n+1

**math**

12/60 = 1/5 of an hour 1 tank can be filled in 1/5 of an hour your rate is 5 tanks per hour 20/60 = 1/3 of an hour The tank can be filled in 1/3 of an hour. your rate is 3 tanks per hour (5 tanks per hour)time + (3 tanks per hour)time = 1 tank filled 5t + 3t = 1 t =1/8 of an h...

**Calculus**

This is derivative of a division (fraction. the rule is the denominator times the derivative of the numerator - the numerator times the derivative of the denominator. ALL OVER the denominator squared. The denominator of the derivative is the easy part. It is just (t^4 -2)^2 No...

**Math**

a. equal number of each Combinations again.. architects 4!/(2!2!) engineers 6!/(2!4!) electricians 9!/(2!7!) b. remove the 2 engineers from the choices which would leave 4 architechts, 4 engineers and 9 electricians Now, we have 17 to choose from to make a group of 6. 17!/(6! ...

**Math**

Remember an odd number has to end with 1, 3, 5, 7, or 9 An even number is divisible by 2 and has to end in 0, 2, 4, 6, or 8

**Math ASAP**

24 is the original perimeter. P = 2l + 2w Just wanted to add that information. You could also just multiply the 24 times 1.5 to get the new perimeter of 36 and then take the difference. The math is a little easier.

**Math**

This is a combination Do you know that 5! = 5x4x3x2x1 =120?? from the 10 people you will choose 7 10! divided by (7!3!) Once you have your group of 7 then there are only 3 people left to put into the group of 3. That is only 1 way. I think the answer is 4320 ways. for 3 groups...

**Math**

I think you are asking for the sum of a series. You are starting with 2 and there is a difference of 3. There is a formula to calculate this total and it won't be 77.

**Chemistry**

Supersaturated solutions are unstable because they are holding more solute than is normally possible. All it takes is for a tiny bit to be added and it begins to crystallize. If you think of a normal salt/water solution. You can get just so much salt to dissolve in water at a ...

**math**

I am assuming that you want to reduce the height proportionally to reducing the width. You made the width 1/2 as big when you took it from 6" to 3 ". You divided 6 by 2 to get 3. What do you think you should do to the 14"?

**math**

4/16 getting a red the first time No replacement 3/15 getting a red the second time Multiply these probabilities together.

**physics**

100/9.86 with give you his velocity running. 100/90.9 will give you his velocity walking. Average the two to get his average velocity in m/sec for the 200 m.

**statistics**

You are looking for the area under a normal curve between -1.5 and 1.5 standard deviations. Use a calculator to find this area or Use a z-table.

**US HISTORY **

WHAT HAPPENED AT THE CVITY OF GONZALES

**US HISTORY**

Do a google search of the ALAMO

**US HISTORY **

WHAT PROBLEMS DID THE AMERICANS AND THE MEXICANS HAVE WITH EACH OTHER IN TEXAS

**US HSITORY**

HOW DID MEXICAN INDEPENDENCE CHANGE TEXAS

**US HSITORY**

HOW DID MEXICAN INDEPENDENCE CHANGE TEXAS

**Composition**

You need to write your revision and then someone here will check it for you.

**statistics**

We need to know some other information. Like the mean and standard deviation for these scores. subtract the mean from 37.5 and divide by the standard deviation to get a z-score. do the same for 39. Use a z-table to find the percentage of scores that will be between the two num...

**math**

5/97 divide 5 by 97 to get a decimal answer. Then move the decimal point two places to ther right and include a % sign.

**math**

You have to know how many pints in a quart. 4 cups in a quart - Right? would there be 2 pints in a quart? If so, multiply that number times the quarts to get number of pints then you can add up the 3 values.

**math**

So.. is A times 0.25 = B If so, then A = 56/0.25 or is A/B = 0.25 If so, then A = B times 0.25 which gives us A = 56 times 0.25

**Math**

I am getting x^2+2x+9 with no remainder Did you divide x - 2 intot x^3 + 0x^2 + 5x -18 You need to put in the 0x^2 because you have the missing x^2 term. since you are dividing by x-2 we cannot have x-2 =0 because division by zero is undefined. So.. we would not want x to be 2...

**physics**

Kinetic Energy = 1/2 times m v^2 1.00 x 10^-19 = (1/2)(1.673x10^-27)v^2 solve for v^2 then take the square root to get v.

**Math**

You need to get common denominators. (9)(8(7) will be the common denominator. multipy the numerator of the 7/9 fraction by (8)(6) and multily the denominator by the same thing. do something similar to the other 2 fractions then compare their numerators.

**Math**

Find out how many degrees is in each slice. Divide that answer into 360 which is the number of degrees in the circle and then you will find the number of slices. You could set up a proportion: 72/3 = 360/?

**Algebra**

factor a 2 out of the 2y-4 in the numerator. then you can cancel out like factors. Can you finish from here?

**MATH**

No.. they said he makes $7 per day.

**MATH**

This seems a little odd to me. if he is paid $7 per day and works 5 days, he should make $35. Is something missing from the question or is this a question where they want you to ignore the extra information?

**Science**

Yes, it is b. the other are between the same elements so those are nonpolar covalent.

**Math**

A circle has 360 degrees for 18 parts divide 360 by 18 for 5 parts divide 360/5

**Math**

50.00 - $18.42 That will tell us how much more he has to earn. Then you would divide this by 2 to get the amount per week.

**math**

I just answered to on of your earlier posts. Check it out.

**math**

120 cards per drawer and 2/3 are baseball. He has 240/3 = 80 baseball cards per drawer. He actually has 240 baseball cards right? because he has 3 drawers. He will trade 1/4 of the 240 = Can you finish it?

**geometry**

Perpendiculars form right angles which are = to 90 degrees.

**math**

Yes

**math**

2/8 + 3/8 = 5/8 these are pink and white. How many are purple? 8/8 - 5/8 = ?

**math**

1/4 of the t-shirts are pink There are 3/4 of the shirts remaining. 1/2 of these 3/4 are white. so we multiply to get 3/8 the rest are purple. we know 1/4 are pink and 3/8 are white. Get a common denominator and add these two fractions and then subtract from 1 which can be wri...

**math**

It is math that you do in your head without paper or pencil or a calculator.

**math**

x y 4 -1 5 -2 6 -3 7 -4 The rule seems to be as x increases by 1, y decreases by 1

**Math Gr.12 (Calculus)**

What are you doing with it? Are you trying to solve for x? If so, you have to subtract 3 from both sides so one side = 0 0 = 6x^2 -2x - 11 If this won't factor, you can use the quadratic equation to solve for x. -b +/- (the square root of (b^2-4ac)) all of this divided be 2a.

**MATH**

9x^2 + 5x - 4 the AC method Multiply the 9 times -4 You have -36 think of factors that will multiple to equal -36 but add to equal the middle number 5. 36 times -1 no 9 times -4 yes Sometimes it takes awhile to find the right numbers. Once you do, you write them and -4x + 9x Y...

**MATH**

y^3 + y^2 - 4y - 4 factor by grouping the first two and the last two. Be careful with the second grouping because of the _(-) in front of the 4y. (y^3 +y^2) + (-4y -4) Take out the common factors: y^2(y+1) + -4(y+1) See the y+1? Write that down once and your other factor is wh...

**math**

Did they ask how much would they sell the ice for? or what is the profit? the profit is $225 and the total price they will sellit for is $975 Read the question again carefully.

**math**

$225 is the profit. they will sell the ice for $750 + 225 which is $975 total.

**math**

Did you read my answer to her questions? We start by dividing 1500 by 5 lbs per bag to get the number of bags which is 300 Since each bag costs 2.50 and we have 300 of them. we paid how much? Once you get that answer multiply by 30% or .30 to get the profit.

**math**

It is Megan... write below us.

**math**

If you look before this note. You will see your problem listed below. If you don't see it let me know and I will do it again.

**math**

I did answer this one earlier.

**math**

A circle has 360 degrees. The angle for each slice should be 36 degrees. Can you figure out the angle for 3 slices?

**math**

Okay.. just think about it a little more.

**math**

1500 divided by 5 = 300 You wrote that step backwards. 300 X 2.50 = 750 Why did you subtract 120 and 36?? that isn't needed? Multiply 750 x .3 is correct $225 is the answer. What part is confusing. if you have 1500 lbs and each bag weighs 5 lbs. YOU must have 300 lbs. righ...

**math**

It costs $2.50 per bag and you have 300 bags. You have to multiply them. Does that make sense?

**math**

5 lbs per bag... How bags will you have? 1500/5 = 300 bags how much does she pay for the 300 bags? Can you do this step? If so, the next step is just multiplying that answer by .3 to find the profit.

**trig**

tan x = opposite/adjacent cot x = adjacent/opposite they are reciprocals of each other. tan x = 1/cot x Can you finish from here?

**Algebra**

You are welcome.

**Algebra**

56/(56+x) = 70/100 silver/(silver + additive) silver / total weight is 70% or 70/100 56/(56+x) = .7 Cross multiply and solve for x

**Algebra**

I guess it can be D.. but I still like A better.

**Algebra**

I agree

**chemistry**

You have to find the mass of 1 mole first. Then you will know what fraction of a mole you are working with one mole has 5 carbons your fraction of a mole has ? carbons

**math**

You have to get common denominators. Try 21. Then subtract.

**Algebra**

You are welcome.

**Algebra**

I get 34... 20 liked pepperoni only, 26 like banana peppers only. I got these numbers by subtracting the 5 that liked both I have a total of 51 students that means there were 14 others that liked neither. I added the 14 that liked neither with the 20 that liked pepperoni only....

**math**

This sounds like a right triangle c^2 = a^2 + b^2 You have the two sides and are missing the hypotenuse which is the shortest length between two points. c^2 = 4^2 + 7^2 You square each number add them and then take the square root to find c.

**Math**

You are welcome.

**Math**

Jar 1 = x Jar 2 =y x = 4+ 2y x + y = 712 so 4 + 2y + y =712 Can you finish from here?

**math**

Percent increase can be tricky. find 16,200 - 14,500 that gives you the increase. to find % increase. divide that answer by the original amount which is $14,500. you will get at decimal. Move the decimal to the right 2 places and add the % sign.

**math**

.26 (x) = 350 if you use algebra?? divide both sides by .26 If you don't use algebra, I can show you another way.

**math $$**

Yes, it is D.

**landmarks**

This isn't as bad as you think 28 minimum and 34 max. Your numbers have to be between 28 and 34 with a median of 30 28 30 34 You need an equal number of entries above and below 30 with 29 being a mode.. it means you can have multiple entries 28 29 29 29 29 30 30 31 32 33 3...

**Math**

You need to get common denominators so that you can relate each fraction to the other ones. Another way would be to write each as a decimal. The first 3/5 = .6

**math $$**

Let x = 0 You have 5(0) - 2y = 10 so -2y = 10 divide both sides by -2 to find y. Your ordered pair is (0, y) Do the same for y = 0 5 x - 2(0) = 10 5x = 10 solve for x and your ordered pair is (x, 0)

**Math**

You are looking for a number that both 8 and 12 will go into which is 24.

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