Thursday

July 30, 2015

July 30, 2015

Total # Posts: 885

**chemistry **

A 30.0 g sample of water at 10.0°C is mixed with 50.0 g of water at 57.0°C in a calorimeter. Calculate the final temperature of the mixture
*July 20, 2015*

**navarro college biology**

During the sequencing of dna into a protein, what is the first step?
*June 13, 2015*

**English**

Please could you help me that I don't have run on sentences or if I need commas.After reading "Man's Nature is Good" Mencius argues that man is born good but, that life itself makes a man evil. He states "Human nature is inherently good, just like water ...
*June 3, 2015*

**Algebra**

Solve. -9(4-k)/12 = 9(k+1)/8
*June 2, 2015*

**Math**

The vertical backboard located 4ft from the baseline supports the rim of the basketball net. The backboard measures 6ft wide by 4ft high. The shooter's square is a white box above the rim of the basket. It must measure 1 1/2 ft high and 2ft wide. What is the area of the ...
*May 15, 2015*

**life orientation project**

research and briefy discuss the following processes that the community must engage whenever there is an issue before and during a protest :how to engage in a protest, protest restrictions,permit to hold a protest, activities during a protest,as well as the powers of the police...
*May 11, 2015*

**math**

If A + B + c = 180 then show that sinA + sinB + sinC=4cosA/2. cosB/2 . cosC/2
*May 8, 2015*

**General Chemistry 132**

What is your profession Dr Bob
*May 6, 2015*

**General Chemistry 132**

When solid NH4NO3 is dissolved in water at 25celcius, the temp of the solution decreases. What is true about the signs of enthalpy and entropy for this process? I understand entropy is positive, however, i do no understand why enthalpy is also positive. Can someone please ...
*May 6, 2015*

**precalculus**

hyperbola with vertices at (0,+/-2), and asymptotes y=+- 1/2x
*May 6, 2015*

**Science**

How does the sun's gravitational attraction to the earth compare to that of the moon?
*May 3, 2015*

**math:Fundamental Counting Principlal**

solve the problem by applying the fundamental counting principal with two groups of items. Shaun is joining a music club. as part of ther 4-cd introductory package she can choose from 12 rock, 10 alternative, 7 country, and 5 classical. if Shaun choose one selection from each ...
*April 30, 2015*

**math**

A baker can make a cupcake for $2.30. She would like a profit of 50 cents each. What is the percent markup on the cupcake, to the nearest tenth of a percent?
*April 28, 2015*

**math**

So do i just subtract 180-50.7?
*April 9, 2015*

**math**

2 line segments intersect to form an angle that has a measure pf 50.7 degrees. What is the measure in degrees of an angle that is supplementary to this angle. I dont understand what this question is asking me. Can someone explain it to me?
*April 9, 2015*

**Chemistry**

Use half reaction to balance: CuS + NO3^- = Cu(NO3)2 + NO2 + SO2 S^2- = SO2 S Oxidized Cu^2+ + NO3^- = NO2 + Cu(NO3)2 N Red After balancing the atoms & balancing the charges, I cannot get all the correct coefficients
*March 28, 2015*

**Physics**

You're an investigator for the National Transportation Safety Board, examining a subway accident in which a train going at 80km/h collided with a slower train traveling in the same direction at 20km/h . Your job is to determine the relative speed of the collision, to help ...
*March 25, 2015*

**Math 7th grade**

Geraldo bought some computer software on layaway. He paid $12 down and must make a payment of $5 each week for 4 weeks. How much will Geraldo pay in all?
*March 16, 2015*

**Algebra 2**

Multiplying or dividing rational expressions 6x^2 + 13x - 5 divide by 6x^2 -23x + 7 Need to show my work.
*February 22, 2015*

**multivariable calculus**

show that a=!0 , the equation p=2asin0cos0 describes the sphere centered(a,0,0) at radius|a|
*February 15, 2015*

**Physics**

The mans mass would be the same as on earth so its just 560/9.8=57.14kg Second part is F=[(Gconstant)(m one)(m two)]/(radius)^2 G constant is 6.67E-11
*February 12, 2015*

**Physics**

static =velocity squared over (radius times gravity). solve for velocity and you get velocity to equal square root (radius*gravity*static)=square root of .15*.30*9.8= .664 m/s
*February 10, 2015*

**math**

its 58,000
*January 29, 2015*

**math**

i have tryed this like ten times but cant get the answer can u help. 58,00 times 7.40% after u get the answer between the two multiply by 3
*January 29, 2015*

**Language Arts**

The correct answer is decided.
*January 27, 2015*

**geometry**

a pentagon with a perimeter of 45 feet
*January 22, 2015*

**I guess this is physics related?**

Yeah I've done a project like this and we had to measure the time with a very precise instrument.
*December 29, 2014*

**I guess this is physics related?**

What is the biggest source of error in measuring the acceleration of a ball down a ramp? knowing the length of the ramp accurately measuring the time knowing the height of the ramp knowing the mass of the ball****
*December 29, 2014*

**science**

A + F = yes perhaps also "B - The orientation of the chamber" since this could change between one end of the chamber and the other? ? thoughts? orientation = up/down?
*December 13, 2014*

**science**

Yes, I think A + F could be confounding variables probably not B + D + E B does not change across the chamber D is irrelevant E is also irrelevant probably not C, this does not change across the chamber thoughts?
*December 13, 2014*

**science**

What is a confounding variable? "A confounding variable is a variable, other than the independent variable that you're interested in, that may affect the dependent variable. This can lead to erroneous conclusions about the relationship between the independent and ...
*December 13, 2014*

**science**

An experiment is set up to test whether a particular insect prefer a dark or a bright environment. A chamber with a gradient in light intensity from one end (dark) to the other (bright) has been made. The experimental hypothesis is: “There will be a large difference ...
*December 13, 2014*

**Math**

The function f given by f(x) = x^3 + 12x – 24 is? Increasing for all x's? Cause that's what I think..
*December 9, 2014*

**Chemistry**

Calculate the solubility (in g/L) of calcium fluoride in water at 25°C if the Ksp for is 1.5 × 10-10 .
*December 2, 2014*

**American National Government**

Since the 1930s, when the federal government became more involved in domestic policy functions, federalism has come to be understood as a relationship in which the states are moresubordinate to the supreme power and authority of the national government. **So would the answer ...
*December 1, 2014*

**American National Government**

Despite the greater federal authority in the federal relationship, federalism is still important for all the following reasons except that: A)it provides the best means of developing a vast country because it allows for experimentation. B)it may stimulate the interest of the ...
*December 1, 2014*

**POL 201**

Despite the greater federal authority in the federal relationship, federalism is still important for all the following reasons except that: A)it provides the best means of developing a vast country because it allows for experimentation. B)it may stimulate the interest of the ...
*December 1, 2014*

**POL 201**

Actually the correct answer is "C" it impedes the authority of the government.
*November 23, 2014*

**POL 201**

Thank you Ms. Sue
*November 23, 2014*

**POL 201**

After reading this link, would it be All basic protections were contained in the Constitution?
*November 23, 2014*

**POL 201 **

The federalists argued that a Bill of Rights was not necessary because? A. All basic protections were contained in the Constitution. B. the anti-Federalists were being irrational. C. it impedes the authority of the government. D. it would take too long to ratify.
*November 23, 2014*

**english**

3. In “The Pigman & Me,” the author creates a mood of suspense by focusing most of the action around a fight between two boys at school. a tree cut almost to its heart. Nonno Frankie’s advice to Paul. concerns about how a girl will react.
*November 17, 2014*

**language arts**

Which of these best states Nonno Frankie’s main idea of how to win a fight?
*November 17, 2014*

**physics**

what is the t shirts vertical componet of its velocity at launch? if it launches straight at 45° above the horizontal plane at 141 /s?
*November 13, 2014*

**physics**

car doing 60 mph and skids for 52.3 meters what is the speed at end of skid co/friction is 0.693 urgent help please
*November 3, 2014*

**science**

52.3 meters co of friction is .693
*November 3, 2014*

**science**

car doing 60 mph skide for 52.3 mts what is the speed at end of skid
*November 3, 2014*

**Statistics**

a Rollercoaster's auditors estimate that the average daily loss from those illegally riding without tickets is at lease (greater or equal) $295, but wants to determine the accuracy of this statistic. The company researcher takes a random sample of losses over 64 days and ...
*November 1, 2014*

**english**

Which sentence contains a proper noun? (1 point)The boy quickly ran ahead of his mother to get to school. My dog plays all afternoon with the neighborhood kids. The sweater Tanya wore today was not warm enough. Birds or fish would be a good place to start for a research project
*October 30, 2014*

**math**

the height of a ball thrown vertically upward from a rooftop is modelled by h(t)=-5t^2 +20t+50. Determine the maximum height of the ball.
*October 14, 2014*

**Physics**

Consider tension force on rope. When ball/cart is not moving, T = mbg. If ball swings to an angle theta, O, then the y-component of T is mbg cosO. The cart is also pulling on the crane of the rope with a Fapp that is opposite to the x-component of the T (mbg sinO). Newton'...
*October 12, 2014*

**Physics**

A cart of mass m (including the mass of the crane) has a pendulum hanging from a crane attached to the cart. There is no friction due to the normal force, u = 0, or wheel bearings of the cart wheels. The cart is experiencing and applied force to the left of 10N. The ball at ...
*October 12, 2014*

**math(fractions) **

6/5 times 15/4 =90/20 but i cant figure out what the answer is on my answer sheet i have to simplfly. please help thanks you ms.sue and brady .
*October 7, 2014*

**math(fractions) **

what is 9/10 times 25/6.i got 225/60 but its not on my answer sheet.i need to simplify. It's not on my answer sheet. please help. its a puzzle.
*October 7, 2014*

**Physics**

Edit: Part 2 Find the angle of the third displacement.
*October 5, 2014*

**Physics**

A particle undergoes three displacements. The first has a magnitude of 15 m and makes an angle of 40 ◦ with the positive x axis. The second has a magnitude of 6.2 m and makes an angle of 158 ◦ with the positive x axis. After the third displacement the particle ...
*October 5, 2014*

**Math Help**

So the answer would be x = -10√1-y) + 2 or (96 + 4x - x^2)/100?
*October 4, 2014*

**Math Help**

Find the inverse of the following function algebraically. Show all work. f(x)=-5√-4x+4+2
*October 4, 2014*

**math**

Milk was purchased for $48.00. Due to the price increases, this was 2.3 times the cost of milk two years ago. What was the cost of milk two years ago?
*September 21, 2014*

**Pre-Calculus**

I'm kind of stuck on how to do this. Can someone help me? Thanks! Write the equation of the line with slope -2 that passes through the point (-1, -3) in slope-intercept form.
*September 14, 2014*

**math**

Which set of points are on the line y = 6x - 1? {(0, -1), (29, 5)} {(0, -1), (5, 29)} {(-1, 0), (29, 5)} {(-1, 0), (5, 29)}
*September 8, 2014*

**math**

Identify the solution(s) of the system of equations, if any. 6x + 4y = 0 y = 3 - 3x (–3, –2) (–3, 2) (–2, –3) (2, –3)
*September 8, 2014*

**math**

Simplify. (6x)2
*September 8, 2014*

**algerbra**

Identify the solution(s) of the system of equations, if any. 6x + 4y = 0 y = 3 - 3x (–3, –2) (–3, 2) (–2, –3) (2, –3)
*September 8, 2014*

**math**

Identify the solution(s) of the system of equations, if any. 6x + 4y = 0 y = 3 - 3x
*September 8, 2014*

**math**

Identify the solution(s) of the system of equations, if any. x + 3y = 7 6x - 9y = 6
*September 8, 2014*

**algerbra**

Identify the solution(s) of the system of equations, if any. -4x - 4y = 4 12y = -12x - 12 no solution (0, -1) (-1, 0) infinitely many solutions
*September 8, 2014*

**math**

Consider the following system of equations. y = 2x - 2 y - 2x = 7 What can you conclude about the system of equations? The system of equations is inconsistent. The system of equations is dependent. The system of equations is independent. none of these
*September 8, 2014*

**algerbra**

Which set of points are on the line y = 6x - 1? {(0, -1), (29, 5)} {(0, -1), (5, 29)} {(-1, 0), (29, 5)} {(-1, 0), (5, 29)}
*September 8, 2014*

**math**

A clothing store offers a 60% discount on all purchases. What is the discount in dollars (before tax) for an item originally costing $18.00 dollars?
*September 8, 2014*

**math**

the expression that is equivalent to -6(x - 6).
*September 8, 2014*

**algerbra**

The temperature on one day in January for Phoenix, AZ, is 56 degrees Fahrenheit. On the same day in Barrow, AK, the temperature is -31 degrees Fahrenheit. What is the difference between these two temperatures?
*September 8, 2014*

**Calculus**

Two points P and Q are connected by a straight road of length d. At time t = 0, a car starts driving from P to Q at a constant speed c. At t = 0, a bee starts flying from Q toward the car at a constant speed b > c, and takes a zig-zagging path, reversing direction each time...
*September 6, 2014*

**thank u**

thank u steve
*September 4, 2014*

**7th grade math**

identify a value of x for which sum of 3+x is positive
*September 3, 2014*

**7th grade math**

when x is nonzero integer the sum 0f 3+x is sometimes negative and sometimes positive. Identify a value of x for which the sum of 3+x is negative.
*September 3, 2014*

**Language Arts**

Which sentence contains a proper noun? (1 point)The boy quickly ran ahead of his mother to get to school. My dog plays all afternoon with the neighborhood kids. The sweater Tanya wore today was not warm enough. Birds or fish would be a good place to start for a research ...
*September 2, 2014*

**math**

dentify the solution(s) of the system of equations, if any. 3x-2y=6 5x=5-25y
*September 1, 2014*

**algerbra**

Identify the solution(s) of the system of equations, if any. -3x-4y=2 8y=-6x-4
*September 1, 2014*

**algerbra**

Identify the solution(s) of the system of equations, if any. x=1 y=1
*September 1, 2014*

**algerbra**

Identify the solution(s) of the system of equations, if any. 3x+2y=4 5x-4y=3
*September 1, 2014*

**algerbra**

Identify the solution(s) of the system of equations, if any. -3x-4y=2 8=6x-4
*September 1, 2014*

**math**

At the school carnival, Carmen sold 3 times as many hot dogs as Shawn. The two of them sold 152 hot dogs altogether. How many hot dogs did Carmen sell?
*September 1, 2014*

**math**

Identify the solution(s) of the system of equations, if any. -2x - 4y = 8 8y = -4x - 16
*September 1, 2014*

**algerbra**

Consider the following system of equations. y = 4x - 4 y - 4x = 3 What can you conclude about the system of equations?
*September 1, 2014*

**algerbra**

A line passes through the points (-10,-4) and(-1,2) . What is the y-intercept of the line? a)(0,8/3) b)(8/3,0) c)(0,-4) d)(-4,0)
*August 25, 2014*

**algerbra**

Which of the following is an equation of a line that passes through the point (0, 5) and has a negative slope? y = 5x + 5 y = 5x y = -5x - 5 y = 5x - 5 y = -5x + 5
*August 25, 2014*

**algerbra**

thats not one of the answers
*August 25, 2014*

**algerbra**

A plumber charges customers $48 for each hour worked plus an additional $9 for travel. If h represents the number of hours worked, which of the following expressions could be used to calculate the plumber's total charge in dollars? 48 + (9 * h) 48 + 9 + h (48 * 9) + h 48...
*August 25, 2014*

**algerbra**

The temperature on one day in January for Phoenix, AZ, is 54 degrees Fahrenheit. On the same day in Barrow, AK, the temperature is -17 degrees Fahrenheit. What is the difference between these two temperatures?
*August 11, 2014*

**Management**

Which one of the following is a defensive strategy?
*July 28, 2014*

**Management**

When a manager performs symbolic duties as the head of an organization, that manager is called a
*July 28, 2014*

**Business**

in the u.s. economy,_____are considered the reward for risk of entering business.
*July 28, 2014*

**Physics**

A student is skateboarding down a ramp that is 8.33 m long and inclined at 24.5° with respect to the horizontal. The initial speed of the skateboarder at the top of the ramp is 4.12 m/s. Neglect friction and find the speed at the bottom of the ramp.
*July 8, 2014*

**math**

Suppose a football team's offense which passes 58% of the time (and rushes the rest), averages 6.9 yards per pass and 4.4 yards per rush. In a game with 65 offensive plays, how many yards would you expect them to gain
*June 28, 2014*

**Chemistry**

A balloon contains 0.350 mol of Ar at 5.00°C and 68.0 kPa pressure. What is the volume of the gas?
*June 23, 2014*

**chemistry**

Indicate which of the following quantum states are allowed and which are disallowed under the rules governing the electronic structure of atoms. n = 2, l = 1, ml = 0, ms = ½ n = 3, l = 3, ml = -2, ms = -½ n = 4, l = 3, ml = -2, ms = ½ n = 3, l = 2, ml = 2...
*June 22, 2014*

**English**

Skateboarding originated in Venice, California. the time was the mid-seventies. There was a drought. The swimming pools were empty. A)Skateboarding originated in Venice,California,there was a drought, swimming pools were empty,the time was the mid-seventies. it says combine ...
*June 13, 2014*

**English**

cumulative sentences or periodic pattern Periodic sentence Unable to eat dinner, do my homework, or get any sleep, I could think only of my mother's surgery the next morning Cumulative sentence All I could think about was of my mother's surgery the next morning, I was ...
*June 13, 2014*

**Cumulative sentences english**

Able to think only of my mother's surgery the next morning, I could not even eat my dinner, much less get any sleep, nor could I do my homework. My Answer First one is periodic sentence Unable to eat dinner, do my homework, or get any sleep, I could think only of my mother...
*June 13, 2014*