Thursday

October 27, 2016
Total # Posts: 595

**Chemistry**

Devise a test to distinguish between Cu2+ and Co2+.

*November 19, 2012*

**Chemistry**

Devise a test to distinguish between Cu2+ and Co2+.

*November 19, 2012*

**Chemistry II**

Devise a test to distinguish between Cu2+ and Co2+.

*November 19, 2012*

**science**

what do oxygen and sugars do in photosynthesis

*November 17, 2012*

**Algebra**

Task Type: Individual Project Deliverable Length: 3 Parts: See Assignment Details Points Possible: 150 Due Date: 11/5/2012 11:59:59 PM CT Weekly tasks or assignments (Individual or Group Projects) will be due by Monday and late submissions will be assigned a late penalty in ...

*November 13, 2012*

**math**

Can someone please help me? I don't know how to work this out, and my friends don't either. Eight hot dogs and ten buns come in separate packages. a. Is the number of hot dog packages proportional to the number of hot dogs? Explain. b. Is the number of hot dogs per ...

*October 28, 2012*

**calculus **

Write a formula for f^-1 (x) if f(x) = (x+5)/(3x-4) and state the domain of F^-1

*October 27, 2012*

**art need help**

Yeah! Connections Academy Questions!!! I need em all!!! Halp!!! The text book is poop on my Mac.

*October 23, 2012*

**physics**

The maximum speed of a child on a swing is 4.90 m/s. The child's height above the ground is 0.525 m at the lowest point in his motion. How high above the ground is he at his highest point?

*October 11, 2012*

**Math**

I really need help

*October 4, 2012*

**7th grade math ms. sue please help**

Me too Tj

*October 1, 2012*

**BIS 245 lab**

need help

*September 27, 2012*

**physics**

A passenger on a moving train tosses a coin with an initial velocity of (-2.25 m/s)x unit vector + 4.26 m/s)y unit vector (from the point of view of the passenger). The train's velocity relative to the ground is (11.5 m/s)x unit vector. (a) What is the minimum speed of the...

*September 16, 2012*

**Math**

There are 36 students in Mrs. Keaton's sixth grade class. If 5/12 of her students are girls, how many girls are in the class? Thanks :-)

*September 11, 2012*

**math**

al has twice as many baseball cards as frank and four times as many football cards as joe. the expression 2x+4y can be used to show the total number of baseball and football cards Al has. If the answer is y, then what is the question?

*August 17, 2012*

**Math**

a jar contains green,red,and blue marbles.The probability of choosing a blue marble is 1/3, the probability of choosing a red marble is 1/2,the probability of choosing a green marble is 1/6.If there are 12 marbles in the jar,and then three green marbles are added,what is the ...

*August 15, 2012*

**Math**

If x-2y-z=2,x-y+2z=9 and 2x+y+z=3,then z=?

*August 13, 2012*

**Math**

the cube has a volume of 8.If point x,the midpoint of AV is joined to point y, the midpoint of edge CD what is the length of the shortest distance from x to y?

*August 8, 2012*

**Math**

John will have to make 180 monthly mortgage payments and the first payment was made on January 15,1989.If he makes one payment each month,in what year will John make his last payment?

*August 8, 2012*

**Math**

John will have to make 180 monthly mortgage payments and the first payment was made on January 15,1989.If he makes one payment each month,in what year will John make his last payment?

*August 8, 2012*

**Math**

If the average of 10 numbers is 10 and the sum of five of the numbers is -25 what is the average of the other 5 numbers?

*August 7, 2012*

**Math**

A professional basketball team has won 50 out of the 75 games played so far.The team still has 45 games to play.How many of these games must the team play in order to have a season record of winning 60% of the games played?

*August 7, 2012*

**math**

If the surface area of a cube is 150e2 what is the volume of the cube?

*August 6, 2012*

**Math**

If x-1/3y=3, then the value of 3x-y-6=? a) 15 b) 9 c) 6 d) 3 e) 0

*August 6, 2012*

**Math**

Thank You

*August 6, 2012*

**Math**

oh i read the question wrong I got D

*August 6, 2012*

**Math**

i got E

*August 6, 2012*

**Math**

Brian rode his motorbike for 3 hours at 50 miles per hour and then rode the next 200 miles in 5 hours.What is the total distance he traveled? a)150 b)190 c)250 d)350 e)1150

*August 6, 2012*

**Math**

1)If a (theres a square)b is defined as the average of a and b, what is the value of 2 (theres a square) 4 (theres a square) 9? a) 3 b)5 c) 6 d)7.5 e) 18 2)If A=(r+s)F, what is the average of r and s when A=8 and F=2? 3) For the three numbers a,j,k, (a<j<k),the ...

*August 5, 2012*

**Math**

1) Mr.Anderson has 3 passenger seats in his car.He offered to drive some of the 5 members of his daughter's club to the movies. How many different groups of 3 passengers could he drive? 2) A jar has green and red marbles.If the ratio of green to red is 3:2,what is the ...

*August 5, 2012*

**Math**

Given (a+2,a-2)= a for all integers a, (6,2)= a) 3 b) 4 c) 5 d) 6 e) 8 The cost of a drive-in movie is $y per vehicle. A group of friends in a van shared the admission cost by paying $0.40 each.If 6 more friends had gone along,everyone would have paid only $0.25 each. What is ...

*August 2, 2012*

**math**

A certain store is selling an $80 radio $64. If a different radio had a list price of $200 and was discounted at 1.5 times the percent discount on the $80 model, what would its selling price be? a) $90 b) $105 c) $120 d) $140 e) $160

*August 2, 2012*

**math**

A certain printer can print at the rate of 80 characters per sound, and there is an average of 2,400 characters per page.If the printer continued to print at this rate, how many minutes would it take to print an M-page report? a) m/30 b) m/60 c) m/2 d) 2/m e) 60/m

*August 2, 2012*

**Math**

If point A is (-3,-2) and point B is (5,5) then what is the length of segment AB to the nearest tenth?

*August 2, 2012*

**Math**

The radius of the small circle A is one-half the radius of the large circle B.WHat is the ratio of the area of the small circle to the area of the large circle?

*July 31, 2012*

**Math**

If a line L with a slope of -2/5 passes through the points (5,0) and (x,-2) then what is the value of x?

*July 31, 2012*

**Math**

To the nearest tenth,what is the circumference of a circle with an area of 49pi?

*July 31, 2012*

**Math**

If Jack's house is 7.1 miles due north of the Senior Citizen Center and Belinda's house is 6.3 miles due west of it, then to the nearest tenth,what is the shortest distance between their houses?

*July 31, 2012*

**Math**

a square in a circle with a radius of 2 pi .What is the perimeter of the square?

*July 31, 2012*

**math**

13/225

*July 30, 2012*

**math**

What is the probability that a randomly selected three-digit number has the property that one digit is equal to the product of the other two? Express your answer as a common fraction.

*July 30, 2012*

**math**

if there are 10 more girls than boys in a club with 60 members, how many are boys?

*June 28, 2012*

**math**

35/27

*June 25, 2012*

**Pre algebra**

How do I solve Quadratic equations by factoring? (for example how would I solve n2 - 10n = -21 if I was supposed to get the answers 7 and 3?

*June 7, 2012*

**Humanities**

Explain the focus on the idea of natural law as an extension of human nature during the conclusion of the seventeenth century.

*June 7, 2012*

**Math**

Carl owe the workers 80hours pay 2 days at 8hours a day is 16 hours day (3)work only 4 hours Total hours work 20 " for 4 workers working 20 hours =20 X 4 =80 hours pay

*June 7, 2012*

**Science**

Please may you find a labeled diagram of a weather thermometer.

*May 27, 2012*

**Math**

How do you simplify products of radicals? Please help!

*May 24, 2012*

**Math**

If a letter is chosen at random from the word PRESEVERANCE,what is the probability that the letter choosen is E?

*May 9, 2012*

**statistics**

On an exam whose scores followed a normal distribution, a student's z-score was +2. What percentage of students scored better than he did? (Use the 68-95-99.7 Rule.)

*April 25, 2012*

**noun**

if two dices are tossed together, the probability that the product will be less or equal to 18 what?

*April 24, 2012*

**Chemistry**

Are hybridized orbitals used to explain the fact that the four bonds in methane are equivalent? If not, what is?

*April 16, 2012*

**Chemistry**

The pH of a 0.100 M solution of an aqueous weak acid (HA) is 4.00. What would the Ka for the weak acid be?

*April 16, 2012*

**physics**

tommy builds a human sling shot that has an elastic constant of 4000 N/m. He puts his little sister in it and pulls it back for 5 meters. How much energy does his 25 kg sister have as she leaves the sling shot and how fast is she flying?

*March 27, 2012*

**maths**

Please I want to know how many litres make a metric tone.

*March 25, 2012*

**STATISTICS**

.868

*March 19, 2012*

**physics**

How would one plug the gravitational constant into an equation? To be honest, I'm having a hard time with the idea of the gravitational constant in general, but I need to solve an equation for the circular velocity of a galaxy. I know I need to multiply the gravitational ...

*March 8, 2012*

**6th Grade Math**

Simon went to the store to buy new school supplies. Simon spent 1/4 of his money on pencils and paper and 1/2 of his money on a backpack. If Simon has $12.50 leftover, how much did the backpack cost?

*March 4, 2012*

**Math**

There are 24 students in Mrs.Smith's 1st block class. 1/4 of the class passed the math test with an A. 12 students in the class passed the math test with a B. What percent of the students in the class passed the test?

*March 1, 2012*

**Math**

There are 24 students in Mrs.Smith's 1st block class. 1/4 of the class passed the math test with an A. 12 students in the class passed the math test with a B. What percent of the students in the class passed the test? ****** This is how I slove the problem, but I stuck in ...

*March 1, 2012*

**physical science **

120ml of a solution whose concentration is 30g/ml was diluted with distilled water by raising its volume to 160cm3. Calculate the concentration of the new solution.

*February 25, 2012*

**Algebra 2**

did you ever get this answer?

*February 21, 2012*

**statistics**

0.215

*February 17, 2012*

**chemistry**

Pls promise where is the valuefor r in that question

*February 17, 2012*

**math**

I have a question. I think I'm wrong, so I want to ask if it's right. If I do 3/4 x 1 5/6 x 7/4 x (-2 3/8) would the answer be negative?

*February 6, 2012*

**Math**

Given h(r) = 1/(r + 2), find: h(x^2) + 1 Thank You

*February 4, 2012*

**math**

the chef at a restaurant bought 37 pounds of salad for $46.25. how much did she pay for 1 pound of salad

*January 30, 2012*

**chemistry**

9.5 g Butane + 34.0 g Oxygen = 43.5 Then 43.5 - 28.7 g CO2 = 14.8 That is the answer: 14.8 g

*January 22, 2012*

**Precalc**

An ellipse has this Cartesian equation: ((x-2)/5)^2 + ((y-4)/3)^2 = 1 Find the focal radius Find the eccentricity Write the parametric equations for the ellipse Transform into the form, Ax^2 + By^2 + Cx + Dy + E = 0

*January 20, 2012*

**Precalc**

A hyperbola has this Cartesian equation: -((x-2)/5)^2 + ((y+1)/3)^2 = 1 A. Find direction in which it opens. Horizontal? B. Find the coordinates of the center. I think it's (-2,1) or (1,-2)? C. Find the slopes of the asymptotes: m=+- ?

*January 20, 2012*

**Precalc**

The figure shows the pre-image and first iteration for a set of transformations. If the iterations are carried on infinitely, the resulting fractal figure will have dimension given by Dimension=(LogN)/Log(1/r) It tells me to find N and r... What should I be looking for on the ...

*January 19, 2012*

**Precalc**

Thank you so so so much! I've been stuck on this for hours!

*January 19, 2012*

**Precalc**

The figure shows a 10 x 10 square centered at the origin. The darker-shaded square is the image of this square, dilated by a factor of 0.8 and rotated about the origin by exactly the number of degrees, , so that its corners touch the sides of the parent square. The corners of ...

*January 19, 2012*

**4thGrade Math**

11/15 feet long per piece. Or 8.8 inches.

*January 19, 2012*

**Precalc**

For this matrice, [[0.9cos(-30), 0.9cos(60), 2] [0.9sin(30), 0.9sin(60), 4] [0, 0, 1]] What is the rotation (in degrees) and is it clockwise or counterclockwise? I think it's 30 degrees clockwise...Is that right?

*January 19, 2012*

**Precalc**

I think it's [[2,4,6,4] [4,5,4,1] [1,1,1,1]] Is that correct?

*January 19, 2012*

**Precalc**

Write a 3 x 4 pre-image matrix for a kite with the points (2,4) (4,5) (6,4) and (4,1)

*January 19, 2012*

**Precalc**

I have: A. vector n= 3*vector i + 2*vector j + 5* vector k B. vector v= 7*vector i + 10*vector j + vector k C. 52.46 degrees And I'm not quite sure for D...

*January 18, 2012*

**Precalc**

Given the plane 3x+2y+5z=54 and the points P0(6, 8, 4)[on plane] and P1(13, 18, 5) [not on plane] A. Find vector n, a vector normal to the plane B. Find vector v from P0 to P1 C. Find the angle between vector n and vector v D. Find p, the scalar projection of vector v on ...

*January 18, 2012*

**Precalc**

Is it just ((6/11), (9/11), (2/11)) ?

*January 18, 2012*

**Precalc**

Yeah, sorry about that. There's a diagram to it and I wasn't sure how else to explain it.

*January 18, 2012*

**Precalc**

A line in space has the vector equation shown here. Fill in the blanks to find the position vector to the fixed point on the line that appears in the equation: vector r=(5+(6/11)d)vector i + (3+(9/11)d)vector j + (7+(2/11)d)vector k vector v= _____ vector i + _____ vector j + ...

*January 18, 2012*

**Precalc**

Ah. Alright, I think I understand.

*January 18, 2012*

**Precalc**

Thanks so much!

*January 18, 2012*

**Precalc**

I wish I could say that's why I don't understand this problem. But sadly, I still don't get it. Haha.

*January 18, 2012*

**Precalc**

In the problem before it says r(x)= (x^5 - c^5)/(x-c) Maybe it's referring to that? Does that help?

*January 18, 2012*

**Precalc**

By appropriate calculations, show that: lim r(x)=5c^4 (x->c)

*January 18, 2012*

**Precalc**

If α, β, and γ are direction angles for a vector in three dimensions and cos α = 0.6 and cos β = 0.7, find cos γ

*January 17, 2012*

**Precalc**

Suppose vector a is 3 units long, the magnitude of vector b is 1 units and cos (θ) = -0.3, where θ is the angle between the two vectors when they are placed tail-to-tail. What does the inner product of vector a and vector b equal?

*January 16, 2012*

**world history**

The dominant political philosophy in the Qin Dynasty was legalism.

*January 7, 2012*

**Precalc**

At the point were a line intersects a plane [with the equation (24x+32y+40z=480) and three points of A(5, 10, 1), B(6, 3, 6), and C(12, 1, 4)], the vector i-, vector j-, and vector k-coefficients of the line equal the corresponding values of x, y, and z for the plane. By ...

*January 7, 2012*

**Precalc**

Thank you (:

*January 7, 2012*

**Precalc**

Assume that points A(5, 10, 1), B(6, 3, 6), and C(12, 1, 4) are on a plane. Find vector AB and vector AC.

*January 7, 2012*

**Precalc**

Assume that points A(5, 10, 1), B(6, 3, 6), and C(12, 1, 4) are on a plane. Find vector AB and vector AC.

*January 7, 2012*

**statistics**

In 2005, about 233 million people in the United States were aged 14 or older. They consumed, on average, 2.23 gallons of alcohol per person. use scientific notation to estimate the total number of gallons of alcohol consumed by this age group.

*November 23, 2011*

**Science**

What do polar bears and automobiles have in common?

*November 15, 2011*

**Math**

Solve: ((10)/(x^2-3x+45))=x+1

*November 13, 2011*

**Living environment**

diffusion

*October 27, 2011*

**Algebra 2 Problem**

You own a computer store selling two types of laser printers. The first type,A, costs $141 and you make a $45 profit on each one. The second type,B, costs $110 and you make a $35 profit on each one. You expect to sell at least 100 laser printers this month and you need to make...

*October 27, 2011*