Thursday

May 5, 2016
Total # Posts: 998

**History**

I meant *I am not sure it its right**
*October 1, 2013*

**History **

When was the height of Egyptians, Athenians, Alexander's empire, and Roman Empire? I am having hard time finding the exact or round about year to these. I've found two so far, but I am sure if its right. please help so i can study for my test! thank you! This is what i...
*October 1, 2013*

**quantum physics**

ass 6 q6:Now, consider the case where N4 elements are marked instead of just one. If we run one iteration of Grover's algorithm and measure, what is the probability that we see a marked element? q7: Which of the following observables correspond to a standard basis ...
*September 28, 2013*

**chemistry**

jj
*September 17, 2013*

**math**

Working together, 2 groomers can brush 8 horses in 3 hours. How many hours would it take 3 groomers to brush 12 horses at this rate?
*September 8, 2013*

**math/chemisty**

Find the volume of a starburst candy (220 cm cubed). The mass is 5.14 grams. Calculate it's density. How many starburst would it take to fill your locker (139,200 cm cubed)? Use dimensional analysis to solve this problem.
*September 8, 2013*

**chemisty**

Find the volume of a starburst candy (220 cm cubed). The mass is 5.14 grams. Calculate it's density. How many starburst would it take to fill your locker (139,200 cm cubed)? Use dimensional analysis to solve this problem.
*September 8, 2013*

**Math**

What is the product of 9 and 1.333333333?
*August 26, 2013*

**math**

Jim has 1/3 as many goldfish as Hannah. Hannah has 5 times as many goldfish as Ping. If Ping has 15 goldfish, how many goldfish does Jim have?
*August 26, 2013*

**math**

To make punch for her upcoming party, Mary used a recipe that calls for 1/2 cup of fruit juice per serving. If she has e gallons of fruit juice, what is the greatest number of servings of punch she can make? (note: 1 gallon=16 cups)
*August 25, 2013*

**math**

There are some frogs and some lily pads at a pond. If lily pads with frogs on them have two frogs each, then there is one lily pad with no frogs on it. If each lily pad has exactly one frog on it, then there is a frog with no lily pad. How many frogs are at the pond?
*August 25, 2013*

**math**

The heights of the five starters of a college basketball team are 6'6, 6'7, 6'9, 6'11 and 7'. What it the mean height of these players , in inches?
*August 25, 2013*

**math**

In the xy-plane, lines a and b intersect at point (5,-2), and lines b and c intersect at point (-3,3). What is the slope of line b? Express your answer as a common fraction
*August 25, 2013*

**math**

What is the product of the digits of 71?
*August 25, 2013*

**MATH**

the numerator of a fraction is one-half the denominator! If the numerator is is increased by 2 and denominator is decreased by 2, the value of the fraction is 2/3. What is the numerator of the original fraction?
*August 25, 2013*

**MATH**

WRITE THE DECIMAL WITH DECIMAL POINT FOR EACH FRACTION. FIRST SIMPLIFY ANY FRACTION TO LOWEST TERMS SUCH AS A WHOLE #, A MIXED #, OR A SIMPLIFIED PROPER FRACTION FOR THE FOLLOWING: 49/50, 5/7,14/11, 69/100,3/2,7/8,7/12,8/9,15/20,27/25, 5/9.50/10,76/50,29/11,709/100,24/2,25/8,...
*August 22, 2013*

**Math**

Raisin sell for $3.99 per pound. How much will 33 1/3 pounds of raisins cost?
*August 20, 2013*

**Math**

For what positive integer n is 2n+3n+4n=nn?
*August 20, 2013*

**Math**

If x and y are positive integers such that xy =8, what is the maximum possible value of x + y?
*August 20, 2013*

**math**

Half of a third of x equals a fourth of y plus a fifth of y. If'x=27, what is the value of y?
*August 20, 2013*

**Math**

A state creates license plates that each contain two letters followed by three digits. The first letter must be a vowel and duplicate letters and digits are allowed. How many different plates are possible?
*August 20, 2013*

**Math**

Solve the fraction problem and reduce the answer to simplest form 85 5 8 - 29 7 8 =
*July 21, 2013*

**Math Growth & Decay**

122%
*May 15, 2013*

**algebra **

(s) is at least 5 times as great as the number of bieber fans (b)
*May 10, 2013*

**algebra**

i got this question off a benchmark
*May 10, 2013*

**algebra**

(a) of 3000 she makes 55 an hour (h) and how many hours will it take to have an account balance of 3220 a: a=3000+55h;3220 b: 3000+55h =a:5h c: 55+3000h= a=4hours d:a=3000 +55h;4hour
*May 10, 2013*

**science**

what are the changes of statein which energy is increased
*April 28, 2013*

**science**

a boat weights 10,000 newtons what is the magnitude of buoyant force acting on boat in the fliud
*April 28, 2013*

**science**

a 100 pound life guard dives underwater to save a 150 pound person who is drowning the life guard will be able to lift the person to the surface because a:the buoyant force acts as an upward force on the person b:the force of gravity is less in water c:the force of water is ...
*April 28, 2013*

**algebra1**

6x+2/3x+3 division sign 2x-2/4x+4
*April 28, 2013*

**algebra**

6x+2/3x+3 division sign 2x-2/4x+4
*April 28, 2013*

**algebra1**

6x+2/3x+3 division sign 2x-2/4x+4
*April 28, 2013*

**algebra1**

he drove an average of 50 mph for 6 h for the 1st 4 hours he drove 47 mph what was his speed for the ast 2 hours
*April 28, 2013*

**geometry**

20.00
*April 25, 2013*

**algebra**

if ne person can do 25 sqare feet in 4 hours and another in 5 hours how much concrete can they do working together in 8 hours\ \ \
*April 24, 2013*

**algebra**

Andy’s average driving speed for a 4-hour trip was 45 miles per hour. During the first 3 hours he drove 40 miles per hour. What was his average speed for the last hour of his trip?
*April 24, 2013*

**akgebra**

One pipe can fill a tank in 20 minutes, while another takes 30 minutes to fill the same tank. How long would it take the two pipes together to fill the tank?
*April 24, 2013*

**rty**

april, bill, candace and bobby are to be seated at random in a row of 6 chairs
*April 24, 2013*

**algebra**

find the vertex of 400-16tsquared
*April 24, 2013*

**algebra**

An object that is projected straight downward with initial velocity v feet per second travels a distance s vt 16t 2 =+ , where t =time in seconds. If Ramón is standing on a balcony 84 feet above the ground and throws a penny straight down with an initial velocity of 10 ...
*April 24, 2013*

**algebra**

An object that is projected straight downward with initial velocity v feet per second travels a distance s vt 16t 2 =+ , where t =time in seconds. If Ramón is standing on a balcony 84 feet above the ground and throws a penny straight down with an initial velocity of 10 ...
*April 24, 2013*

**algebra**

if x is a x real number what is the sum of x and the opposite of x a-1 b-0 c:-x d- x+1/x
*April 23, 2013*

**algebra**

what ca be concluded from the box below x+3>7 then x+3-3>7-3 a:x-3 b:x+3-3>7-3 c:
*April 23, 2013*

**algebra**

find the vertex of 400-16tsquared
*April 23, 2013*

**math**

240
*April 8, 2013*

**us history**

what roel did jacksons popularity play n the election of 1836 and 1840
*March 3, 2013*

**chm**

You are heating crushed ice and a small amount of water and monitoring the temperature of the icy slurry until it reaches the point were the ice is nearly melted. How does the temperature change during this process? The temperature drops as the ice absorbs the heat and ...
*March 3, 2013*

**Chem**

idk man
*February 27, 2013*

**chm**

If a neutral element has 8 neutrons and 7 electrons, which expression correctly identifies the element?
*February 27, 2013*

**chm**

Which of the following is a covalent compound composed of nonpolar covalent bonds? Answer >>H2 H2O CF4 CH4 NaF
*February 26, 2013*

**chemistry**

What is the osmotic pressure, expressed in the unit mmH2O, of a solution containing 125 ug of vitamin B12 (C63H88CoN14O14P) in 2.50 mL H2O at 25 degrees C? Answer: 9.33 mmH2O
*February 25, 2013*

**Chemistry: Freezing point**

An aqueous solution is prepared by dissolving 1.08 g of human serum albumin, a protein obtained from blood plasma, in 50.0 mL of water. The solution has an osmotic pressure of 0.00770 atm at 298 K. What is the molar mass of the albumin? Answer: 6.86 x 10^4 g/mol
*February 25, 2013*

**Chemistry**

A crystalline white solid is a mixture of glucose (C6H12O6) and sucrose (C12H22O11). Is it possible that a 10.00 g sample of the solid dissolved in 100.0 g H2O might have a freezing point of -1.25 degrees C? Explain. Answer: No. The freezing point would be -1.03 degrees C
*February 25, 2013*

**Chemistry**

A 1.065-g sample of an unknown substance is dissolved in 30.00 g of benzene; the freezing point of the solution is 4.25 degrees C. The compound is 50.69% C, 4.23% H, and 45.08% O by mass. Info you might need on benzene: Normal Freezing point,degrees C: 5.53 Kf, degrees m^1: 5....
*February 25, 2013*

**Chemistry**

What mass of sucrose, C12H22O11, should be added to 75.0 g H2O to raise the boiling point to 100.35 degrees C? Molal boiling point of water: 0.512 Kb, degrees C m^-1 Answer: 18 g sucrose
*February 25, 2013*

**chm**

Why are the atomic masses listed in the periodic table not whole numbers? Answer Scientists have yet to make the precise measurements. That would be too much of a coincidence. ??>>The atomic masses are average atomic masses. or >>Today's instruments are able to...
*February 23, 2013*

**chm**

How would you classify the following material?swimming pool water homogeneous mixture<<< heterogeneous mixture a pure element a pure compound depends on how many children have been in it
*February 23, 2013*

**algebra 1**

If it is 1/(a-y) = 1/y then cross multiply to get y = a -y solve for y in terms of a.
*February 22, 2013*

**Math**

pace is 400 meters/48 seconds You could use a proportion; 400/48 = x/192
*February 22, 2013*

**Math -algerbra**

Are you just taking the square root of the x? If so: x - square root of x = 12 or is it x = sqrt(x+10) + 2? if so: x -sqrt(x+10) = 2 Square both sides: Then solve.
*February 22, 2013*

**math**

It means when y = 0 then x = 1 0 = 1^2 + b(1) + 1 0 = 1 + b + 1 Solve for b.
*February 22, 2013*

**Algebra 1**

3n - 4n -4 = 1/3(n+4) -n - 4 = 1/3 (n+4) multiply all parts by 3 -3n -12 = n + 4 -4n = 16 n = -4
*February 22, 2013*

**Chemistry**

4.0 g/1mole = .54 g/x mole This is a proportion. Cross multiply to find the answer
*February 22, 2013*

**Please help on geometry - analytic geometry**

It helps if you plot the points first, then you can find the length of the sides of the triangle. area of a triangle is 1/2 base times height.
*February 22, 2013*

**Algebra 1**

That isn't the answer. That was just an example of what consecutive even numbers mean to show why we are using n, n+2 and n+4. My equation is the same as yours.
*February 22, 2013*

**Algebra 1**

Even numbers have a differnce of two. 2, 6, and 8 are consecutive even numbers. Let n = 1st Let n + 2 = 2nd Let n + 4 = 3rd 3(n) - 2(2n+2) = 1/3(n+4) Here is the equation. Can you solve it?
*February 22, 2013*

**Math**

l + 2w = perimeter l + 2w = 24 l = 24-2w Area = l times w (24-2w)w = Area. 24w -2w^2 = Area. If you are doing this using calculus, you would take the derivative of the area and set it equal to zero to find w.
*February 22, 2013*

**Guidance and Discipline**

What are the choices?
*February 22, 2013*

**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 ...
*February 22, 2013*

**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.
*February 22, 2013*

**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 ...
*February 22, 2013*

**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.
*February 22, 2013*

**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 ...
*February 22, 2013*

**HISTORY**

Try a google search. I don't see any history tutors online right now. If you can't find anything repost.
*February 22, 2013*

**Math**

Yes!!
*February 22, 2013*

**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?
*February 22, 2013*

**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 ...
*February 22, 2013*

**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
*February 22, 2013*

**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.
*February 22, 2013*

**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.
*February 22, 2013*

**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 ...
*February 22, 2013*

**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 ...
*February 22, 2013*

**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 ...
*February 22, 2013*

**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 ...
*February 22, 2013*

**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...
*February 22, 2013*

**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 ...
*February 22, 2013*

**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.
*February 22, 2013*

**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.
*February 22, 2013*

**Math 0098**

Sorry.. the .08 is a typo. It should be .09 Which makes the equation 7x + 9y = 86000
*February 22, 2013*

**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...
*February 22, 2013*

**Math 0098**

Do you have numbers for this problem?
*February 22, 2013*

**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?
*February 22, 2013*

**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.
*February 22, 2013*

**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
*February 22, 2013*

**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 ...
*February 22, 2013*

**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 ...
*February 22, 2013*

**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! ...
*February 22, 2013*

**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
*February 22, 2013*

**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.
*February 22, 2013*