Friday
July 25, 2014

Posts by kathryn


Total # Posts: 148

Algebra
write the equation of the circle passes through the point (√5,0) and whose center is the origin

Math
identify the center and radius of the circle with the equation (x+5)^2+(y-2)^2=9 A. this equation represents a circle with center (5,-2) and a radius of 3 units B. This equation represents a circle with center (-5,2) and a radius of 3 units C. this equation represents a circle...

Math
identify the center and radius of the circle with the equation (x+5)^2+(y-2)^2=9 A. this equation represents a circle with center (5,-2) and a radius of 3 units B. This equation represents a circle with center (-5,2) and a radius of 3 units C. this equation represents a circle...

algebra
Which cosine function has maximum of -2, and a period of 2pi/3

Algebra
hahaha yes, yes i do its a problem for me(:

Algebra
the table shows the results of a survey of college students. find the probability that a student's first class of the day is a humanities class, given the student is female. First class of the day for college students male female humanities 70 80 science 50 80 other 60 70

math help
14x-3y+2z=100 -17x+8y+10z=11 -3x+13y+29z=81

Algebra 2
A beam rests against a wall, forming a 50 degree with the floor. Use the function y=9 sec 0 to find the length of the beam to the nearest tenth of a foot. choice: 14.0ft, 11.ft7, 5.8ft, 6.9ft

Math
dartboard is 16 inches and bulls eye is 6 inches

Math
Garrett throws a dart at a circular dart board. The dart board has a radius, and the bull's eye in the center of the dart board has a radius of 6 inches. What is the probability that a dart thrown at random within the dartboard will hit the bull's eye? Round your answe...

5th grade Math
Sorry did not mean to post this question again! Steve answered it for me earlier. Thank you Steve for you answer!

5th grade Math
Dr. Gallo's waiting room has a total of 18 magazines, including 3 fashion magazines. There are 5 more cooking magazines than there are decorating magazines. How many decorating magazines are there? You can use cubes to act out the problem.

5th grade Math
Dr. Gallo's waiting room has a total of 18 magazines, including 3 fashion magazines. There are 5 more cooking magazines than there are decorating magazines. How many decorating magazines are there? You can use cubes to act out the problem.

Statistics
You are a real estate agent and you are trying to predict home prices for your clients that want to list their house for sale. You have a very small city without much data. You will need to use the data that you have available for the past year on homes that have been sold. Be...

Statistics
Calculate the residuals using the following info: number of people:12,14,15,18,20,16,14,13,18,19,20,22 and cost of drinks:24,30,36,38,65,44,36,30,39,76,80,85

Statistics
You are a real estate agent and you are trying to predict home prices for your clients that want to list their house for sale. You have a very small city without much data. You will need to use the data that you have available for the past year on homes that have been sold. Be...

Statistics
Calculate a linear regression, the residuals, and the correlation between two variables using the following info: number of people:12,14,15,18,20,16,14,13,18,19,20,22 and cost of drinks:24,30,36,38,65,44,36,30,39,76,80,85

statistics
Estimate the tenure of someone that could have $5.8($k) and 15 years of job satisfaction. Make sure to state your multiple regression equation in your example. What are some of things that you can estimate from the model? How effective is evaluating the R-squared of the model?...

Physics
what force can cause the displacement of an object but does no work??

math
1. Ms.lynch has 21 coins in nickels and dimes. Their total value is $1.65. How many of each coin does she have? 2. A vending machine that takes only dimes and quarters contains 30 coins, with a total value of $4.20. How many of each coin are there?

math
the larger of 2 #s is 5 less than twice the smaller. their sum is 43. find the #s

math
The second of two numbers is 7 times the first. Their sum is 72. Find the numbers.

physics
A truck of mass 8,000kg is traveling along a level road at an initial speed of 25m/s. The driver then shifts into neutral so that the truck is coasting, and the truck gradually slows to a final speed of 13m/s.

math check my answers
squared= ^2

math check my answers
1. 2(x+3)squared-6x+5=0 Answer= 2xsquared+6x+23=0 2. 3xsquared-6x+5=-2(x+1)-10 Answer= 3xsquared-4x+17=0 How would I solve from this point?

math
if 30apples = $47 then 1 apple = x cross mutilpy and you get 30x=$47 divide each side by 30 x=1.56666666 rounded to $1.57 per apple.

Writing
i wrote about my school's dances (7th grade dances). It was be in the yearbook.

Writing
What are some ideas for a title of an article on dances at school?

math (algerba 1) Please help!
x+y=0 3x+y=-4 Sovle each system of equation by graphing. If got the answer (-3,3), but it's not there. Please explain!

Physics
Calculate the total heat content of 10 kg of ice at -23°C. (Hint: absolute zero is -273°C.) Be mindful of significant figure rules for both multiplication and addition.

Physicis
How much energy is needed to heat and melt 3.0 kg of copper initially at 83°C? Be mindful of significant figure rules for both multiplication and addition

Physics
A 6.00 Kg box is sliding across the horizontal floor of an elevator. The coefficient of kinetic friction between the box and the floor is 0.360. Determine the kinetic frictional force that acts on the box when the elevator (a) is stationary (b) accelerating upward with an acce...

Physics
If the 50.0 kg boy were in a spacecraft 5R from the center of the earth, what would his weight be? (Use the 50.0 kg boy for significant figures) i got 20N again not sure.. it dosnt tell me if i got them wrong or right online classes are horrible and very confusing

physics
If an object is dropped from a tall building and hits the ground 3.0 s. later, what is the magnitude of the object's displacement in 1.0 s.; in 2.0 s.? for 1.0s i got 9.8 for 2.0s i got 20. is this correct?

physics
If an object is dropped from a tall building and hits the ground 3.0 s later, what is the velocity of the object when it hits the ground? (Remember that the velocity is downward) i got -29m/s is this correct?

physics
If an object is thrown up at an initial velocity of 9.8 m/s, what would be the magnitude of the final velocity upon impact with the ground? im doing an online class and i dont have a book so if you could explain some of the question that would be great thanks so much

physics
If an object is thrown up at an initial velocity of 9.8 m/s, what would be the magnitude of the final velocity upon impact with the ground? im doing an online class and i dont have a book so if you could explain some of the question that would be great thanks so much

physics
If an object is dropped from a tall building and hits the ground 3.0 s later, how tall is the building?

chemistry
I have a worksheet that has a question on it the question states: How much iron can be recovered from 25.0 g of Fe2O3 and that is all i have i have just started in the middle of this class can i have an explanation of how to get to the answer please?

math
Write a number with 8 more in the tens place (The number is 498,763.14)

Math
Ok I have it! 40 divided by 8 = 5 x 6 = 30 Roses

Math
Bunches of 6 roses were selling for $8. Anita paid $40 for roses. How many roses did she buy? PLEASE HELP!

Trig
Prove cos^2t+4cost+4/cost+2=2sect+1/sect

Trig
A ship leaves port with a bearing of S 40 W. After traveling 7 miles, the ship turns 90 degrees on a bearing of N 50 W for 11 miles. At that time, what is the bearing of the ship from port?

Trig
prove sin(α+β)sin(α-β)=cos^2β-cos^2α

chemistry
I realize this, but I don't understand how to get k1 and k2 in the first question or the second. Also it only gives one temperature in the first question so would t1 and t2 be the same?

chemistry
I realize this, but I don't understand how to get k1 and k2 in the first question or the second. Also it only gives one temperature in the first question so would t1 and t2 be the same?

chemistry
I have two questions that I really don't understand. The first one is: A reaction proceeds with delta H=-10kJ/mol. The energy of activation of the uncatalyzed reaction is 150kJ/mol, whereas it is 100kJ/mol for the uncatalyzed reaction. How many times faster is the catalyze...

writing
Socrates' role in the discussion is to derive an accurate definition of justice by using counterexamples against Thrasymachus' multiple renditions. Thrasymachus makes it easy for Socrates to prove him wrong because he is too quick to offer his definitions of justice an...

writing
Throughout the discussion with Socrates, Thrasymachus jumps to conclusions about what the definition of justice really is and does not consider the implications that he is making. This makes it easy for Socrates to shed light on the flaws in Thrasymachus' definitions and f...

writing
also, that he doesn't consider what his definitions really mean before he says them otherwise socrates wouldn't be able to prove him wrong as quick

writing
my stance is that he gives his opinion too quick.

writing
Ok here is a new one. I tried to follow all five of the tips. On multiple occasions, Thrasymachus is too quick to offer his definitions of justice and does not consider the implications that they put on society but Socrates is present to shed light on the weaknesses in termino...

writing
*philosophers, sorry for mistake

writing
I need help writing a thesis statement for my philosophy paper. The paper is about two philosopher's, Thrasymachus and Socrates. Essentially the paper is about the multiple definitions of justice that Thrasymachus throws out and how Socrates proves them wrong and points ou...

AP Chem. 3
A 1.80 g sample of a large boimolecule was dissolved in 21.0 g of carbon tetrachloride. The boiling point of this solution was determined to be 77.85°C. Calculate the molar mass of the biomolecule. For carbon tetrachloride, the boiling point constant is 5.03°C·k...

Prob and Stats
If X is a random variable with distribution X~N(350,110) find (a)P(X<400) and b)P(250<X<400)

statistics
If a large number of people guess randomly on each of 100 items on a true-false test, the mean would be expected to be ì=___*, and ó=__*. • What % of the examinees would be expected to get a score of 65 or >?

spanish
Please translate these words into a sentence. bebur, manuel, debe, aqua

Physics
You ride your bicycle down a hill, maintaining a constant speed the entire time. 1. As you ride, does the gravitational potential energy of the Earth-bike-rider system increase, decrease, or stay the same? 2. Does the kinetic energy of you and your bike increase, decrease, or ...

physics
A backpack full of books weighing 58.0 rests on a table in a physics laboratory classroom. A spring with a force constant of 140 is attached to the backpack and pulled horizontally. If the backpack begins to slide when the spring ( = 140 ) stretches by 2.40 , what is the coeff...

physics
nvm. i got it. 84 was wrong... thanks for your help!

physics
plugging everything in do I get 84.15? That seems a little high...

physics
A car goes around a curve on a road that is banked at an angle of 30.5 . Even though the road is slick, the car will stay on the road without any friction between its tires and the road when its speed is 19.0 . What is the radius of the curve?

Chemistry
Which of the following compounds is a strong electrolyte? a. C6H12O6 b. C7H14O5 c. C4H8O2 d. NaC2H3O2 e. All of these --- I think it is D but I'm not sure. Also, how do you know if it is a strong or weak acid?

math
15trips

MATH
10*26=260

MATH
10*26=260

MATH
260 license plates

Math
paper = 10 point, 10 off for each day late. student missed 5 out of 10 and was 3 day late. what is the score?

English
By the house the boy and his dog were standing.

Chemistry
well, now working through it I get 5.4x10^14

Chemistry
Convert the value 8.1 x 10^15 ng/m3 to units of g/cm3. I am not sure how to do this kind of problem when the units are cubed. This is what I have so far. (8.1 x 10^15 ng/m3) x (1 g/ 1x10^9ng) x (1m/ 100cm) = 8.1 x 10^22

chemistry
Calcium Hydroxide

health
I copied this answer from answerbag. I hope it helps: There are so many ways to contract AIDS and HIV that its frightening when you think about it. Here are the most common: 1. Unprotected Sex - the #1 transmitter of AIDS and HIV, though that is being disputed currently. Unpro...

Chemistry--Quick Question
Just clarifying but C would be an observation because you would be able to feel/observe the heat coming off of it as it reacts, right?

Chemistry--Quick Question
Okay, I take that back. I think the correct answer(s) would be A, C, and D. I don't think the answer is B because that is an observation and I don't think the answer is E because that is a theory.

Chemistry--Quick Question
Which of the following are LAWS according to the Scientific Method? It is possible for more than one answer. a. The volume of a gas is inversely proportional to its pressure. b. A solid has a mass of 100.0 grams and a volume of 11.1 mL. c. When a piece of magnesium burns in ai...

chemistry
a magnet would pull the iron out of the sand and salt. Can you add water? If so you could add the sand and salt together with water. the salt would dissolve in water. You could use the filter to take the sand out of the saltwater/sand mix and then get the salt back by using th...

chemistry
density=mass/volume plug and chug your numbers to find out

Chemistry
That is correct. Electrons have a negative charge to them. Atoms typically have an equal number of protons, which are positive, to electrons. This makes the atom neutral. By losing an electron, and taking away a negative force, you weigh the atom on the positive side making it...

chemistry
Does Kv2SOv4, Kv2COv3 or KCv2Hv3Ov2 create the greatest increase in pH when mixed with water?

chemistry
The normality of Hv2SOv4 is given as 0.20 N for a reaction in which the Hv2SOv4 furnishes two hydrogen ions. What is the molarity of the Hv2SOv4? A. 0.40 M B. 0.30 M C. 0.20 M D. 0.10 M

chemistry
What is the gram equivalent mass? In a reaction of Hv3POv4 with a base, three protons are donated for each formula unit of Hv3POv4. What is the gram equivalent mass of Hv3POv4?

chemistry
How would set up a problem like this? A mass of 20.0 g of NaOH is dissolved in water to form 5.0 dm^3 of solution. What is the molarity of the hydrogen ion concentration if the temperature is 25 degrees Celsius?

Chemistry
"A 25.0% solution of Al2(SO4)3 has a density of 1.75 g/ml. What is the mass of dissolved solute in 40.0 ml of solution?" How would one set this problem up?

geometry
that doesnt help

geometry
A rectangular box measures exactly 72 cubic feet. What are its possible dimensions? Give 3 answers.

Chemistry
How many atoms of element "R" are present in 55.80 g of (AH3)4(R2O3)4 (molar mass = 478.17 g/mol)? Please help. I've tried going (g of molecule/mol)x(1 mol of molecule/ 55.80g)but I'm not really sure what to do with this.

north america
san francisco is a city california a state

north america
city

5th grade
Friday= 8/10 of a mile ran Wednesday= 1/10 of a mile ran Monday= 6/10 of a mile ran Tuesday= 11/10 of a mile ran

PLEASE HELP: Chemistry
How many atoms of element "R" are present in 55.80 g of (AH3)4(R2O3)4 (molar mass = 478.17 g/mol)? Please help. I've tried going (g of molecule/mol)x(1 mol of molecule/ 55.80g)but I'm not really sure what to do with this.

Chemistry
Hello, I am looking just for someone to tell me how I go about doing this problem, ie. the formula that i would need to know for it. I would really like to figure it out on my own but I'm not sure how to. The mass ratio of Kr to F in a particular compound is 2.206:1. How m...

Algebra
I think it would be 1/12. Each dice has 6 numbers, thus there is a 1/6 probability of rolling any number. When you roll the second dice you have the same probability of getting any number. Since you want the numbers to be the same you would multiple the probabilities of gettin...

reimbusment methodology
Your hospital has just recieved a reimbursement rejection from the fiscal intermediary for two outpatient procedures that were performed on the same day. This rejection was probably generated by....A. the CCI outpatient code editor B. the internal auditing program C. the HAVEN...

12th grade
prove that the statement 1/5+1/5^2+1/5^3 +...+1/5^n=1/4(1-1/5^n) is true for all positive integers n, write your proof in the space below

Physics
for imcomplete cancellation to occur, opposite pulses must have?

Math
A furniture company displays bedroom sets which require 21 square meters of space and living room sets which require 42 square meters of space. The company, which has 546 square meters of available space, wants to display at lease 6 bedroom sets and atleast 5 living room sets....

algebra 2
16 beds * 21 square meters of space = 336 5 living * 42 square meters of space = 210 add those two up and get the total availible space of 546 Draw the graph showing the feasible region.Label the coordinates of the vertices of the feasible region.

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