Posts by Eric

Total # Posts: 819

Combinatorics
The game is euchre which uses a 24 card deck (Ace through 9). The dealer picks up the King of diamonds, names diamonds trump, and discards the King of hearts. Dealer holds the K-10-9 diamonds, Ace spades, and 9 of clubs. Q1. What is the probability that his partner does not ...

Algebra
Let f(x)=8 (3)^ x?2 +2 .  The graph of f(x) is stretched vertically by a factor of 3 to form the graph of g(x) .  What is the equation of  g(x) ?   g(x) = 

Algebra
21. simplify (2sqrt5+3sqrt7)^2 show your work. Been confused on it for a while.

maths
$300/$1500 = 0.2, or 20%

Algebra2
C. 1/2 sin (pi/4) = 1/sqrt(2) (1/sqrt(2))^2 = 1/2

Statistic
At peak periods 15 of attempted logins to an email service fail. log-in attempts are independent and each has the name probability of failing. Ann logs in repeatedly until she succeeds A. Find the probability that Ann needs to log in atleast four times before she succeeds B. ...

Statistic
At peak periods, 15% of attempted log-ins to an email service fail. Log-ins attempts are independent and each has the same probability of failing. Ann logs in repeatedly until she succeeds. A. find the probability that Ann needs to log in at least four times before she ...

Science
What is the mechanical advantage of a machine that used 600N to overcome a load of 1200

Math
Kayla has 3 yards of ribbon. She wants to cut the ribbon into pieces that are 1/4 yard long. How many pieces of ribbon will Kayla have

Chemistry
Suppose a student diluted and titrated a bleach unknown exactly as described in the experimental procedure, except only a single titration was performed which required 16.22 mL of 0.100 M Na2S2O3. The density of the original, undiluted bleach unknown was g/mL. If the number of...

Chemistry
Suppose a student diluted and titrated a bleach unknown exactly as described in the experimental procedure, except only a single titration was performed which required 16.22 mL of 0.100 M Na2S2O3. The density of the original, undiluted bleach unknown was g/mL. If the number of...

algebra
Thank you for your help.

algebra
Want to make sure I am doing this correctly. Use the Intermediate Value Theorem for polynomials to show that the polynomial function f(x)has zero between the numbers given. f(x)=3x^2-x-4 ; 1 and 2 3(1)^2-1-4= - 2 below zero 3(2)^2-1-4= 6 above zero Am I doing this problem correct

Chemistry 2
The molar heat of solution of ammonia is ?30.50 kJ/mol. What happens to the temperature of water when ammonia is added to it? I simply don't know how to answer this and wouldn't ask otherwise. I would be very grateful for assistance.

Algebra
I have that but it tells me to check for extraneous solutions and that is where I am lost for this problem

Algebra
X=-6/7 This was answer to the problem

Algebra
I have answered the question but not sure how to check for extraneous solution. x/(5x+4)=3 The answer is -6/7

Physics
A circus cat has been trained to leap off a 12-m-high platform and land on a pillow. The cat leaps off at v0 = 3.6 m/s and an angle ? = 37°

Algebra
Need help figuring this problem out. The following points are on the graph of: y=f(x) (-5,0),(-2,2),(0,0),(2,-4) and (4,0) Use theorem to identify the corresponding points on the transformed functions. y = 2f(x-3)-2

statistics
The closing price of Schnur Sporting Goods Incv. common stock is uniformly distributed between $20 and $30 per share. Draw the uniform distribution. What are the height and base?

Pre Cal
Write an expanded polynomial equation based on the following information. A cubic function with a zero at x=3 (with multiplicity 2), a zero at x=2, and a constance term of 18.

Precalculus
Multiplying the equation $z^4 + z^2 + 1 = 0$ by $z^2 - 1 = (z - 1)(z + 1)$, we get $z^6 - 1 = 0$. Therefore, every root of $z^4 + z^2 + 1 = 0$ is a sixth root of unity. The sixth roots of unity are $e^{0}$, $e^{2 \pi i/6}$, $e^{4 \pi i/6}$, $e^{6 \pi i/6}$, $e^{8 \pi i/6}$, ...

Math
Sam is hoisting an engine form a pickup truck he is fixing. He hands hoist using 3 rafters on ceiling. Measures the angle the hoist makes at the baseto be 85 degrees and the length across the of chain across rafters to be 80 inches. One length of chain hanging down from ...

Science
why does all the information available state that the maximum amount of table salt that can dissolve in water is: 36-39 g/100 ml @ 20 degrees Celsius. i put 35.7 g in 100 ml over a week ago, check it 3 times daily and a lot of it never dissolved. the water remained cloudy and ...

statistics
Scores on the GRE? (Graduate Record? Examination) are normally distributed with a mean of 541 and a standard deviation of 101. Use the 68-95-99.7 Rule to find the percentage of people taking the test who score between 238 and 844 The percentage of people taking the test who ...

Math
How many inches represent 1 mile. Help 3/10 in = 7/8 mile

Math
I have to find the Unit Price of 64 fl oz = $2.00 I have concluded that 2 / 64 is the answer but I think there is an easier way to show it please help

Math
What is the result of converting 1500 yards into miles?

Calculus
Evaluate the definite integral (low) (high) -?/6 ? ?/6 2sec(x)tan(x) dx

Calculus
Find the value(s) of c guaranteed by the Mean Value Theorem for Integrals for the function over the given interval. f(x) = 4?x [4, 9]

Calc
0 = theta

Calc
Find the critical numbers of the functions. f(0) = 2sec0 +tan0 on the interval [0,2pi]

Math
Simplify (Log75+log9+log5)÷(log5+log45)

math
The ratio of two numbers is 3:5, the smallest number is 45 what is the larger number?

social studis
In this lesson, you learned that government officials represent citizens at the state and local levels as well as at the national level.

math
in which stem do most of the data fall 1 ,2 3, or 4

Math
in which system do most of the data fall 1 ,2 3, or 4. plzzzzz help me

math
C 15

art
this piece of art primarily represents art that

What is the probability that a randomly
what grade are you I go to connexus i am in 6th grade

PE
How does esteem affect the way you behave?

Physics
A batted baseball leaves the bat with a velocity of 41.4 m/s at an angle of 51.2°. If the ball just barely clears the 3.05 m (10 ft) center field wall, a. How long was the ball in the air? ___s b. What must the range be from home plate to the center field wall? ___m c. How...

Physics
Physics teacher has this question for hw. 38. An electric powered model car starts from rest and moves in a straight-line for 4.0 s. The relationship between time and position is x^2+ 2 t^2 = 32, t in seconds and x in cm. Find the velocity at t= 1 s & t = 3 s. he gave us the ...

Chemistry
When carbon is burned in air, it reacts with oxygen to form carbon dioxide. When 26.4 g of carbon were burned in the presence of 82.1 g of oxygen, 11.7 g of oxygen remained unreacted. What mass of carbon dioxide was produced? Express your answer to one decimal place and ...

Educational Technology and Online Learning
what is the purpose of the introduction in an expository essay

Math
Whats the function rule when inputs 2,3,4,5 and outputs 2,5,8,11?

Maths
Ruby has 20 oranges. she eats 3/5 of the oranges. How many oranges did she eat

Math
Sorry I don't know.

Maths
how to solve 150 pupils went to concert.3/4 of the number of boys was equal to 1/7 of the number of girls. how many boys went to the concert?

Geometry
A vertical pole 24ft. high is to be braced securely by four wires attached 8ft. from the top. If the wires are fastened to stakes in the level ground at the vertices of square with its center at the foot of the pole and sides 20ft., what should be the length of each wire?.

Chemisty
Will Cd(OH)2 precipitate if 10.00 g of Cd(NO3)2(s) (MM = 236.42 g/mol) is added to 0.500 L of a 0.800 M NH3 solution?

Math
The large rectangle shown, is composed of five congruent smaller rectangles, each with whole number dimensions. If the perimeter of each smaller rectangle is 20 com, find the are of the entire large rectangle in sq cm.

Physic
A large concave mirror has radius of 6.32m. To magnify an object 1.25m tall by a factor of +2.5 Must the object be placed Will the image appear to be Describe the image 3 things What is the image height

Physic
A large concave mirror has radius of 6.32m. To magnify an object 1.25m tall by a factor of +2.5

Chemistry
Using the equation: 2C2H6 + 7O2--> 4CO2 + 6H20 How many moles of CO2 are produced by the reaction of 21.0 mol O2? Again, not sure how to write it correctly, but if I multiply 7O2 by 3, then I should do the same to the other side of the equation to make it 12CO2?

Chemistry
From the same equation as above, how many moles of CO2 are produced by the reaction of 21.0 mole of O2? 21 moles of O2 means that you would need to multiply 7O2 in the quay ion by 3, so 3 x 4CO2= 12CO2?

Chemistry
Using the equation: 2C2H6 + 7O2--> 4CO2 + 6H20 How may moles of 02 are needed to react with 4.0 mol of C2H6? I think the answer is 14, because if you double the C2H6 to make 4.0 mol, then in the equation you will need to double the O2 to 14. Is this correct?

math
x= -13

math
A number plus itself, plus twice itself, plus 4 times itself, is equal to -104. What is the number?

math
A pair of dice is rolled.What is the probability that the sum of the pips is either an even number on a multiple of 3? total number of space is 36.

Math
An enclosed rectangular garden is 6 meters by 15 meters. Additional fencing within the garden can divide it into three smaller plots, two of them square and one rectangular. What is the least number of meters of additional fencing that is needed?

Algebra
Tell whether the lines for each pair of equations are parallel perpendicular of neither y=-3x+7 -2x+6y=3 Tell whether the lines for each pair of equations are parallel perpendicular of neither y=(-1/5)x=6 -2x+10y=5

Algebra (Urgent)
There should be three answers:) Thanks for your help LadyPhantomhive

Algebra (Urgent)
Which of the following lines are perpendicular to the line y=-1/4x+6 (you may choose more than one answer) 4x-y=2 y=4x 4x+y=6 1/4x-y=6 -4x+y=3

Physics
Three positive point charges are located at the corners of a rectangle. Find the electric field at the fourth corner if q1 = 5 nC, q2 = 6 nC, and q3 = 7 nC. The distances are d1 = 0.6 m and d2 = 0.2 m. (Let the positive x-direction be to the right, and the positive y-direction...

Physics
In the bloodstream, an erythrocyte (red blood cell) of mass m moves with velocity v to the right. Ir collides head-on with a leukocyte (white blood cell) of twice its mass moving to the left with three times its speed. After the collision, the became stuck together. What would...

Physics
A spring with k=1400N/m is firmly anchored to the bottom of a swimming pool. A diver in full SCUBA gear with total mass of 100kg and density of 0.65g/cm3 holds on to the top of the spring. The system reaches a new static equilibrium. After the print is elongated by a length ...

Physics
Imagine a horizontal spring with an elastic constant of 26.5 N/m, held in place just above an air table. If a 2.00 kg mass traveling at 1.50 m/s slams axially into the end of the spring, by how much will it be compressed in bringing the mass to rest?

Science
25.6g

Introduction to computers
You call the help desk to report a problem you are having on your computer. The technician asks you what operation system you are running. You know it is windows 7 but you forgot which version . How can you find out.

Introduction to computers
Which Microsoft operating system started the process of authenticating users with a username and password

Introduction to computers
The command prompt found on Windows 7 and Windows 8 is very similar to the interface of what past operation system.

chemistry
asdfsd

Chemistry
Is nickel 2 chloride an anion or cation ?? Is sodium chloride an anion or cation ?

physics 11
A swimmer swims perpendicular to the bank of a 20.0 m wide river at a velocity of 1.3 m/s. Suppose the river has a current of 2.7 m/s [W]. (a) How long does it take the swimmer to reach the other shore? (b) How far downstream does the swimmer land from his intended location?

math
From cape to home is 500km I drive from Home at a 100km/h how long will it take in hours

Algebra 2
Solve the following sequence systems algebraic ally x+2y=17 x-y=2

Algebra 2
Create an explicit equation for each recursively defined sequence below a1=17,an+1=an-7

Algebra 2
x-3/x=3/5

physics
While John is traveling along a straight interstate highway, he notices that the mile marker reads 256 km. John travels until he reaches the 144 km marker and then retraces his path to the 173 km marker. What is John’s resultant displacement from the 256 km marker? How ...

Algebra 2
Solve each system 3x-9y=3 and 2x=16-y

Algebra 2
Solve each system 6x-2y=10 and 3x-2=y

Algebra 2
For the function f(x)=square root 3x-2 find the value of the expression below. What value of x makes f(x)=6

Social Studies
These are totally wrong I got 50% 2/4

Kitondo boys
A triangle has vertices X(2,2) ,Y(4,2)and Z(3,4).The triangle is enlarged by a scale factor 2 through the origin.What are the coordinates of the image?

Physics
Basically... distance is 4 km Takes 4 min to go down river Takes 6 min to come up How fast is the river?

Statistics/probability
You are considering two mutual funds for your investment. The possible returns for the funds are dependent on the state of the economy and are given in the accompanying table. State of the Economy Fund A Fund B Good 20% 40% Fair 10% 20% Poor -10% -40% You believe that the ...

Physics-Trajectory
A particle's trajectory is described by x =(12t3−2t2)m and y =(12t2−2t)m, where t is in s. What is the particle's speed at t=0s ? What is the particle's speed at t=5.0s ? Express your answer using two significant figures. What is the particle's ...

Physics
Three forces are exerted on an object placed on a tilted floor. Forces are vectors. The three forces are directed as shown in the figure. If the forces have magnitudes F1 = 2.0 N, F2 = 17.0 N and F3 = 15.0 N, where N is the standard unit of force, what is the component of the ...

Physics
The components of vector A⃗ are Ax = + 3.90 and Ay = -4.00. What is the angle measured counterclockwise from the +x-axis to vector A⃗ ?

Physics-VECTORS
Find the vector's magnitude and direction. Part A A⃗ = 4 i^− 8 j^ A =? θA =?

Physics
A rocket-powered hockey puck moves on a horizontal frictionless table. The figure below shows the graphs of vx and vy, the x- and y-components of the puck’s velocity. The puck starts at the origin. The graph of the X-velocity is v=8t cm/s and the Y-velocity is V=30cm/s ...

Chemistry
a) Biphenyl, C12H10, is a nonvolatile, nonionizing solute that is soluble in benzene, C6H6. At 25 degrees Celcius, the vapor pressure of pure benzene is 100.84 torr. What is the vapor pressure of a solution made from dissolving 13.8 g of biphenyl in 32 g of benzene? b) Express...

Math
Interval it exists on: (5-x)y"+3xy'-y=1 y(0)=2

english
How can animated jungle animals, sea creatures, fairies, cars and other non-human characters can be used to represent race?

biology
lymphocyte

nutrition
Which of the following is one of the ways that the endocrine system interacts with the digestive system? a) Eliminates wastes generated in the body b) Transports nutrient to cells c) Controls the passage of food in the blood stream d) Secretes hormones that regulate how much ...

nutrition
Which is the best way to balance your dietary choices? a) If you overeat at lunch, you should skip dinner. b) If you eat two slices of pizza at lunch, you should walk an extra mile after dinner. c) If your dinner has no vegetables, you should eat a cereal containing fiber at ...

nutrition
I say it is D

nutrition
Which is the best way to balance your dietary choices? a) If you overeat at lunch, you should skip dinner. b) If you eat two slices of pizza at lunch, you should walk an extra mile after dinner. c) If your dinner has no vegetables, you should eat a cereal containing fiber at ...

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