Wednesday
November 26, 2014

Posts by peter


Total # Posts: 880

Algebra 2
Solve using linear combinations. x - 5y = 6 3x + 4y = 18 What are linear combinations?
October 3, 2011

math
"I think we can say that the father is 24 years older than John, regardless of how old they are. If J represents John's age now, then 3J represents John's father's age. This is equal to J+24, so we set an equation 3J = J + 24 2J = 24 J = 12, 3J = 36 John is 12...
October 2, 2011

Algebra 2
Shouldn't it have 4 points due to 4 vertices?
October 2, 2011

Algebra 2
Find the coordinates of any vertices formed. 3x + 4y ≥ 12, 5x + 6y ≤ 30, and 1 ≤ x ≤ 3. I tried graphing this, which formed a parallelogram, but it was hard to find eyeball vertices.
October 2, 2011

Algebra 2
How many set solutions are there for this problem 33x + 103y = 6526? The solution cannot contain negative integers or decimals and fractions.
September 30, 2011

math
This is a riddle, and I'm supposed to find a 5-digit number from it..... My thousand's digit is the first that is perfect, but if you're not happy with that, it's also the product of the first two primes. My units digit is the odd of those two primes, and if ...
September 30, 2011

Diophantine Equations (Algebra 2)
A box contains two sizes of bolts. The small size weighs 33 grams. The large size weighs 103 grams. The total weight of the bolts is 6526 grams. How many of each size are there? Can you write and solve it with Diophantine Equations.
September 30, 2011

English
"The Scarlet Ibis" interpretive essay help. Directions: James Hurst, the author, makes the observation that "pride is a wonderful, terrible ting, a seed that bears two vines, life and death." These words are central to the meaning of the story. The phrase ...
September 30, 2011

Math
i think 82 is the answer.
September 30, 2011

Algebra 2
The tens digit of a two-digit positive integer is 2 more than three times the ones digit. If the digits are interchanged, the new number 13 less than half the given number. Find the given integer. (Hint: Let x = tens-place digit and y = ones-place digit, then 10x + y is the ...
September 30, 2011

math
Tony and Tom are brothers.This year both of their ages are prime numbers. Last year both of their ages were composite numbers. Both of their ages will be composite numbers again over the next three years. If Tony and Tom are both teenagers, how old are they now?
September 29, 2011

math/science
this is the only information we have been given. hope someone can help.
September 29, 2011

math/science
Please can you explain how to do the following: a) a non-smoker with low blood pressure has a plasma chloesterol concentration of 5mmol per litre. Over a period of time this concentration increases to 8mmol per litre. By how many times has this risk of heart disease increased...
September 29, 2011

biology
Please can you explain how to do the following: a) a non-smoker with low blood pressure has a plasma chloesterol concentration of 5mmol per litre. Over a period of time this concentration increases to 8mmol per litre. By how many times has this risk of heart disease increased...
September 28, 2011

physics
A diver leaves the board traveling at 3.5 m/s at an angle of 75º with respect to the horizontal. What is her speed when she hits the water, 3 meters below?
September 27, 2011

math
A cube measures 2 meters on each side. What is the volume of the cube?
September 25, 2011

Math
simplify (8 – i) – (4 – i) using Complex Numbers
September 7, 2011

algerbra
if 16-b<7 then, a) b < or equal to 8 b) b > 9 c) b < or equal to 7 d) b > or equal to 7
September 4, 2011

chemistry
Q(H20)=100g x 4.18 JK-1g-1 x 30K =100 x 4.18J x 30 (Since the rest cancel each other out) Wallah
September 3, 2011

Algebra II
"The smallest integer divisible by 10 and 32 is 160, and the smallest integer divisible by 6 and 20 is 60. The difference between them is 100." - Princeton Review
July 26, 2011

Algebra II
I think it's C.
July 26, 2011

Pre-Calc
Let cis Θ = cos Θ + i sin Θ. Let z1 = 3 cis 25 and let z2 = 4 cis 115 Find z2^6
July 25, 2011

Occ
(x^2 +4)y = 2x
July 25, 2011

Math
Let cis Θ = cos Θ + i sin Θ. Let z1 = 3 cis 25 and let z2 = 4 cis 115 Find z2^6
July 25, 2011

geometry
You can't find out the scale factor if you aren't given any numbers for the sides of the triangles.
July 21, 2011

Algebra
If A + B = 12, and B + C = 16, What is the value of A + C? A. -4 B. -28 C. 4 D. 28 E. The answer cannot be determined from the given information.
July 13, 2011

math
each side of a square painting id 5 ft long.what is the painting area.what is the painting perimter?
June 20, 2011

algebra
use 2 as the base!, 2 raise to the power of n, where n is the number of elements in a set.
June 11, 2011

algebra
whats the fastest and most easiest way to find all the subsets in a given set?
June 11, 2011

Chemistry
How do you balance the equation when citric acid is added to NaOH?
June 8, 2011

Geometry
A solid is composed of a cube with side length 6 meters and a hemisphere with diameter 6 meters. Find the volume of the solid.
June 1, 2011

Geometry
A rectangular prism with 2 little square bases of a radius of 1m. It's height or rectangular length is 5m. Please help me find the surface area. The answer should be less than 50m².
June 1, 2011

Mathematics
Plug in d. D = the number of minutes the practice drills last "30 minutes are spent on practice drills." 20 + 30 + 10 = 60 minutes.
June 1, 2011

Trigonometry
Solve SSA: B= 12.1 degrees b= 16 a= 23.9
May 30, 2011

Trigonometry
Use Heron's formula: a=46 b= 52 c= 67
May 30, 2011

Trigonometry
verify the identity: 1-cos^2x/1-sinx= -sinx
May 30, 2011

U.S. History
True or False? "The rebels are our country men again." Is a quote that is referring to the Emancipation Proclamation.
May 25, 2011

U.S. History
True or False? General Sherman's 60 miles path of destruction was from Atlanta, Georgia to Savannah, Georgia?
May 25, 2011

U.S. History
True or False? If a soldier had a wounded arm, it would most likely be amputated during the Civil War.
May 25, 2011

U.S. History
Life for African Americans in the South changed after the Civil War because many Africans Americans...?
May 25, 2011

MATH ~~
HELP Please!! Sample autocorrelations at lag1, lag2, and lag3 denoted by r1, r2, and r3 of weekly sales of shampoo bottles was found 0.4551, 0.3376, and 0.2514. Using the criteria of your text, the maximum number (‘n’) of weeks for shampoo bottles sales to be ...
May 25, 2011

physical science
true/false All units of energy are vectors.
May 23, 2011

physical science
true /false for every action, there is an equal and opposite reaction is best defined as Newton's Third Law
May 23, 2011

physical science
true/false A lens that converges light is concave
May 23, 2011

physical science
true/false the force of friction always opposes motion.
May 23, 2011

Geometry
A square is circumscribed about a circle. What is the ratio of the area of the circle to the area of the square? A. 1/4 B. 1/2 C. 2/π D. π/4
May 18, 2011

math
Basically 41 and 17/12 minus 27 and 7/12. So it's 14 5/6
May 18, 2011

math
Basically 41 and 17/12 minus 27 and 7/12. So it's 14 5/6
May 18, 2011

physics ( need answer very very soon pleaseeeee)
how do we find out the electron charge and mass if we dont know what type it is?
May 13, 2011

physics ( need answer very very soon pleaseeeee)
a. Acceleration is a = e*E/m e is the electron charge and m is the electron mass b. Solve the equation Since the electron's velocity component parallel to the plates remains the same as when it entered, t = 0.10 m/(3*10^6 m/s)
May 13, 2011

Astronomy
In what ways do Earth and the moon move through space? How do these motions produce such phenomena as day and night, the seasons, phases of the moon, and eclipse?
May 12, 2011

Astronomy
You are correct.
May 12, 2011

Physics
Explain why objects experience a buoyant force when immersed in a fluid. How can you find the value of the buoyant force?
May 12, 2011

calculus
The distribution of the time taken to run 1000 metres by users of a treadmill in a sports centre has mean 7.2 minutes and standard deviation 2.045 minutes. 1 Choose the option that is closest to the probability that the mean time taken to run 1000 metres for a sample of 30 ...
May 12, 2011

Chemistry
Explain why carbohydrates, lipids, and proteins are important parts of a well-balanced diet.
May 10, 2011

Chemistry
so 3 to 6...
May 10, 2011

Chemistry
What is the ratio of carbon atoms to hydrogen atoms in the compound 2CH2 = C2H4? A. 1 to 9 B. 9 to 1 C. 3 to 6 F. 6 to 3
May 10, 2011

Chemistry
What is an unsaturated hydrocarbon?
May 10, 2011

Chemistry
Material X is an organic compound that mixes poorly with water and is highly flammable. Of the following choices, material X is most likely a(n): A. Carbohydrate B. Ester C. Alcohol D. Hydrocarbon
May 10, 2011

Chemistry
C5H11Oh represent... A. Amino Acid B. Organic Acid C. Alcohol D. Ester
May 10, 2011

Math
It would be mostly addition or subtraction...
May 9, 2011

pre algebra
If you wanted factored its 2(5x+37). If wanted it simplified its 10x+74. If you wanted to combine the expressions its 10x+74. If you wanted it evaluated plug in x.
May 9, 2011

physics
A block of mass M connected to an untstretched horizontal spring of spring constant k is hit by a bullet of mass m which has a velocity V just before the collision. The bullet stays in the block. The coefficient of friction between the block and surface is b. Explain how do ...
April 21, 2011

Pre-Calculus Vectors
nvm got it
April 18, 2011

Pre-Calculus Vectors
Let u = 2i − j, v = −i + j. Find 2u - 3v.
April 18, 2011

Pre-Calculus
My "diagram" messed up. The y axis is broken its supposed to look like a Cartesian plane.
April 18, 2011

Pre-Calculus
Let F1 = 219.5, F2 = 447.3, θ1 = 52.79◦, θ2 = 7.831◦. Find the magnitude of the resultant F1 _\|_ θ1 (in quadrant 3 positive) | F2 _|/_ θ2 (in quadrant 1 positive) | I know this is probably hard to understand but I cannot draw diagrams on here
April 18, 2011

algebra 1
given;n+8(n+20)=110 1;n+8n+20=110 2;9n+20=110 3;9n=110-20 49n=90
April 11, 2011

Physics 20
DYNAMICS: A 54kg fireman slides down a pole of a distance of 3m. if the man hits the groung at 4.4m/s than what will the force of friction acting on the man due to the pole?
April 6, 2011

Physics 20
dynamics A curling stone has a mass of 20kg. a curler pushed the stone across the ice to launch it down the rink. a)if the curler starts to move the stone by pushing it with 15N, what is the stones initial acceleration? b)once moving, how much force is required to keep the ...
April 6, 2011

physics
DYNAMICS: A 54kg fireman slides down a pole of a distance of 3m. if the man hits the groung at 4.4m/s than what will the force of friction acting on the man due to the pole?
April 6, 2011

physics 20
DYNAMICS: a skier starts at the top of a 30m hill ta an anle of 20 degrees. the skier goes straight down the firctionless slope. How long will it take the skier to get to the bottom?
April 6, 2011

Physics 20
Dymamics unit A car standing still is struck by 2 other cars simultaneously. a beetle applies a force of 2350N [N60degreesE] and a truck applies a force of 4150N [SW]. What is the net force acting on the stationary car?
April 6, 2011

physics 20
DYNAMICS: A 54kg fireman slides down a pole of a distance of 3m. if the man hits the groung at 4.4m/s than what will the force of friction acting on the man due to the pole?
April 6, 2011

Physics 20
Dymamics unit A car standing still is struck by 2 other cars simultaneously. a beetle applies a force of 2350N [N60degreesE] and a truck applies a force of 4150N [SW]. What is the net force acting on the stationary car?
April 6, 2011

English
what is art online? ( online art galeries, virtual art, nowadays art or something different?)
April 6, 2011

English
What is the role of art in people’s life?
April 5, 2011

Physics 1301
ac = (omega^2)*(radius) = (31.2^2)*(0.12 m) = 116.8
April 4, 2011

english
Section I: Make all necessary corrections to the following sentences. If a sentence has no errors, mark it correct as written: I did it but need reassurance. first sentence is teachers the second one is mine. 1. I’ve always wanted to go to college, it is something my ...
April 1, 2011

world geography
Start locally and then work your way up is basically very common if you start with little.
March 31, 2011

Pre-calc
for some reason i am gettin 23pi/24
March 29, 2011

Pre-calc
how many radians are displaced by the minute hand of a clock between 1:00 pm and 6:45 pm of teh same day
March 29, 2011

equal to greater than and less than
bryce and jewel were playing with kick balls in gym class. Bryce kicked seven tenths of the kick balls into the net. Jewel kicked twenty three thirtieths of the balls into the net. Which athlete scored more goals?
March 29, 2011

geometry
I got this problem wrong on a test and i want to know how to fix it. In triangle ABC, angle A is 20 degrees and side AC is 7.89 units, find the other sides and angles
March 29, 2011

physics
A certain roller coaster has a circular, vertical loop of radius 10 meters, such that at its top the riders are upside down. How fast does the roller coaster move at this point if the riders feel perfectly weightless when passing the top of the loop?
March 23, 2011

chemistry
how would you say in words LiMnO2 ? would lithium manganese oxide be correct?
March 21, 2011

physics
magine a straight line connecting the centers of the earth and the moon. At some point along this line the gravitational forces pulling a spacecraft towards the moon and towards the earth exactly balance each other, and the craft could just sit there in (an unstable) ...
March 20, 2011

chemistry
what effect would each of the errors decribed below have on the concentration of potassium hydrogen phthalate... 1) so of the solids potassium hydrogen phthalate will spilled when transfering into the beaker... 2) not enough water was added to bring the volume up to the mark
March 13, 2011

Chemisrty
What is the pH of a 0.20 M solution of NH4Cl? [Kb(NH3) = 1.8 × 10−5]
February 22, 2011

math
The Wildlife Federation surveyed 170 San Diego residents. The results are as follows: 26 had a membership to the Birch Aquarium 44 had a membership to the San Diego Zoo 17 had both construct a venn diagram answering the foloowing questions i. How many had only a zoo membership...
February 20, 2011

Physics
A tow truck exerts a force of 3000 N on a car, accelerating it at 2 m/s2 . What is the mass of the car?
February 1, 2011

physic
examples of mechanicals waves
January 31, 2011

Chemistry
moles of NaOH = .100 x 35.46 / 1000 = 0.003546 2NaOH + H2A = Na2A + 2H2O so moles of H2A = 0.001773 these are in .43 g so mass of 1 mole = .43 /0.001773 = 242.53 g / mole .. molar mass of the acid
January 24, 2011

hum
Explain the basis of judgement you believe should be used for addressing the moral questions oe delimmas surroundingclimate change
January 19, 2011

Math
What is the circumference of a circle with a diameter of 10 m.
January 17, 2011

Math
If a right triangle has legs of 9in. and 12in. What is the length of the hypotenuse?
January 11, 2011

Alg II
I have a rectangle whose sides are in the proportion b:a, where b is the longer side. I draw a line parallel to a inside the rectangle in order to break it up into a square with sides of length a and a second rectangle. Amazingly, the sides of the new smaller rectangle are in ...
January 11, 2011

geometry
I've got it! Thank you very much for your help!
January 9, 2011

geometry
The real problem is that I do not comprehend the question. The part I'm really stumbling over is the "rotated about the side AB". I have no idea what that means.. I have another question that is quite similar...so if anyone can explain, it would be greatly ...
January 9, 2011

geometry
The rectangle ABCD is rotated about the side AB. Find the volume of the solid defined by this rotation. AB = DC = 4cm AD = CB = 2cm
January 9, 2011

Pages: <<Prev | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | Next>>

Search
Members