
Math(is the problem too hard?)
Find the coordinates of the point whose polar coordinates are (20,140degrees). r=20 0=140 x=r cos (o) y=r sin (o) x=20 cos (140) y=20 sin (140) x=20 (0.7660)= 15.32 y=20 (0.6427)= 12.85 (15.32, 12.86) on my answer on my paper, I left off the  and the )
asked by Jon on April 22, 2009 
Mat117
a. Suppose a market research company finds that at a price of p = $20, they would sell x = 42 tiles each month. If they lower the price to p = $10, then more people would purchase the tile, and they can expect to sell x = 52 tiles in a month’s time. Find
asked by Danie on July 17, 2010 
mathsurgently needed
A manufacturer lists the price of the goods at Rs.240 per article. The wholesaler gets a discount of 25% on the goods from the manufacturer. The retailers are allowed a discount of 15% on the list price by the wholesaler. The prescribe rate of sale tax at
asked by Anonymous on January 30, 2013 
math
a. Suppose a market research company finds that at a price of p = $20, they would sell x = 42 tiles each month. If they lower the price to p = $10, then more people would purchase the tile, and they can expect to sell x = 52 tiles in a month’s time. Find
asked by Jesse on June 11, 2010 
algebra
) Suppose a market research company finds that at a price of p = $30, they would sell x = 42 tiles each month. If they lower the price to p = $20, then more people would purchase the tile, and they can expect to sell x = 52 tiles in a month’s time. Find
asked by Anonymous on January 27, 2012 
physics
A 8.95 μC point charge is glued down on a horizontal frictionless table on the right. If is tied to a 6.35 μC point charge by a light nonconducting wire with length 2.5 cm on the left. The charges are placed in a external, uniform electric field with
asked by Anonymous on February 3, 2014 
math
a. Suppose a market research company finds that at a price of p = $20, they would sell x = 42 tiles each month. If they lower the price to p = $10, then more people would purchase the tile, and they can expect to sell x = 52 tiles in a month’s time. Find
asked by Danie on July 17, 2010 
Math
Allegra has a cellphone plan that charges $65 per month and $0.10 for every minute that she uses the phone beyond what her plan allows. One month, she was billed $73.40. a. Define a variable for the unknown. b. Write an equation to model the problem.
asked by Jullian on September 19, 2013 
Calculus 1
a power station needs to supply power lines to a location 10 miles downstream and on the other side of a river that is 0.75 miles wide. Power lines cost $7 per foot on land and $10 per foot under water. What is the most economical path? What is the minimum
asked by chelz on November 3, 2015 
Physics
Skier A of mass 71kg slides down a slope and makes a completely inelastic collision with Skier B, who is stationary, and has a mass of 55kg.Immediately after the collision both skiers have a speed of 5.8m/s. a)Find the speed of skier A immediately before
asked by Christine on October 25, 2015 
Help Plz.. Algebra II
Allegra has a cellphone plan that charges $65 per month and $0.10 for every minute that she uses the phone beyond what her plan allows. One month, she was billed $73.40. a. Define a variable for the unknown. b. Write an equation to model the problem.
asked by Jullian on September 19, 2013 
algebra
a. Suppose a market research company finds that at a price of p = $20, they would sell x = 42 tiles each month. If they lower the price to p = $10, then more people would purchase the tile, and they can expect to sell x = 52 tiles in a month’s time. Find
asked by Anonymous on May 17, 2010 
Math 7th grade
1) of the dolls in mo's doll collection, 1/5 have red hair. of these 3/4 have green eyes. what fraction of Mo's dolls collection have both red hair and green eyes? 2) ( Use measurement conversions) find 1/2 of 1/4 of a gallon. 3) Cheryl is organizing her
asked by catalina on October 1, 2012 
chemistry
If all the energy obtained from burning 1.23 pounds of propane (fuel value is 11.09 kcal/g) is used to heat 125.0 kg of water at an initial temperature of 21.8 °C, what is the final temperature? Hint: The heat, q, released by burning propane is absorbed
asked by Yasha on March 25, 2012 
physics
In a hydraulic lift, the radii of the pistons are 2.93 cm and 10.1 cm. A car weighing W = 11.0 kN is to be lifted by the force of the large piston. (a) What force Fa must be applied to the small piston? 925.7 N (b) When the small piston is pushed in by
asked by Akbar on April 9, 2012 
physics
a car traveled at uniform velocity of 20m/sec for 5 sec the brakes are applied and car retards uniformly and come to rest in further 8 sec.find a)distance traveled in first five sec b)distance traveled after breaks are applied c)total displacement during
asked by parul on May 28, 2012 
9th grade
Celia bought 12 apples, ate two of them, and sold the rest at 20 cents more per apple than she paid. Her total profit was $1.00. How much did she sell for each apple? I need help with this question. I know that this is a bought and sold question. I know
asked by Kendrick on September 27, 2010 
physics
A cart of mass 223 g is placed on a frictionless horizontal air track. A spring having a spring constant of 10.20 N/ m is attached between the cart and the left end of the track. When in equilibrium, the cart is located 11.0 cm from the left end of the
asked by Anonymous on November 26, 2012 
Calculus
Calculus If V volts are measured across a resistance of R ohms in a circuit carrying a current of I amperes, V=IR. At a certain instant, the voltage is 250 and is increasing at a rate of 4 volts/min, while the current is 0.5 AMP and is increasing at a rate
asked by Trevor on February 28, 2013 
College Physics
A particle is moving in the xy plane with constant acceleration. At t=o, the particle is given by x=4m, y=3m, and has a velocity v=2m/s xhat  9m/s yhat. The acceleration of the particle is given by a=4m/s^2 xhat + 3m/s^2 yhat. Find the velocity vector
asked by Anonymous on September 15, 2010 
Science
Study the animal in the image below. What can you infer about the animal from this image? ( the image is a frog that is camouflaged on a tree) A.Its skin color is a warning to potential prey B.Its skin color is the result of a disease C.Its skin color
asked by Peter on January 5, 2014 
Math
There is a 100 question multiple choice test each with 5 choices. You randomly guess each question. Set up the binomial probability formula to find the probability of getting exactly 80 correct out of 100. Check to see if you can use the normal
asked by Trisha on December 16, 2015 
socials
i find many information on internet of invasion of italy during world war 2 but it not tell me straightforwardly how italy get involved in it and what it really about. it was invasion of sicily. I think british only fight off germans, but how italy
asked by Mohammad on November 24, 2011 
Mathematics
A shop offered a special on socks and handkerchiefs for Father's Day. For k50 you could buy 7 pair of socks and 3 boxes of handkerchiefs or for K24 you could buy 3 pair of socks and 2 boxes of handkerchiefs. A. From a pair of simultaneous equations for the
asked by Monica on June 13, 2016 
Algebra 2
Can someone please explain how to do this problem? A regional soccer tournament has 64 participating teams. In the first round, the number of games played decreases by a factor of one half. Find a rule for the number of games played in the regional soccer
asked by Jane on February 24, 2014 
math133
) Solve algebraically and check your potential solutions: sqrtx+2+0 Answer: Show your work here: 3) The volume of a cube is given by V = s3, where s is the length of a side. Find the length of a side of a cube if the volume is 800 cm3. Round the answer to
asked by michelle on May 30, 2010 
Physics
A motorcycle is following a car that is traveling at constant speed on a straight highway. Initially, the car and the motorcycle are both traveling at the same speed of 19.0m/s , and the distance between them is 52.0m . After t1 = 5.00s , the motorcycle
asked by Anonymous on January 24, 2015 
physics
A cart of mass 223 g is placed on a frictionless horizontal air track. A spring having a spring constant of 10.20 N/ m is attached between the cart and the left end of the track. When in equilibrium, the cart is located 11.0 cm from the left end of the
asked by Anonymous on November 26, 2012 
Physics
A motorcycle is following a car that is traveling at constant speed on a straight highway. Initially, the car and the motorcycle are both traveling at the same speed of 19.0m/s , and the distance between them is 52.0m . After t1 = 5.00s , the motorcycle
asked by Anonymous on January 24, 2015 
Confidence Intervals
Over the last 15 Major League Baseball seasons, the mean number of strikeouts by the American League leader is 258.5. Assuming that the number of strikeouts by the league leader is normally distributed and the standard deviation for all seasons in all
asked by melanie on June 20, 2008 
physics
a force of 200N is inclined at an angle 120° to another force P. The angle between the 200N force and the resultant force is 50°. Find the magnitude of (a) force P (b) resultant of the two forces
asked by haffy on February 4, 2016 
physics
a force of 200N is inclined at an angle 120° to another force P. The angle between the 200N force and the resultant force is 50°. Find the magnitude of (a) force P (b) resultant of the two forces
asked by haffy on February 4, 2016 
Statistics
A certain curve (that is NOT the normal curve) is shown below. The curve is symmetric around 0, and the total area under the curve is 100%. The area between 1 and 1 is 58%. What is the area to the right of 1? I do not know how to do this because it is not
asked by Lilly on June 9, 2018 
Math: Algebra2 Logarithms
Can someone help me find the value of B in this expression???? log 64 = Blog 4 5 5 Grrr... sorry about that. Here's the expression again: log (base = 5) 64 =B log (base = 5) 4 log 64 (base5) = log 4^b (base5) so 64 = 4^b by recognition of 64 as a power of
asked by UnstoppableMuffin on April 29, 2007 
Math
The ratio of female teachers to male teachers in a junior school is 13:5. if there are 48 more teachers than the male teachers, find the total numbers of teachers in junior school?
asked by Safi on September 7, 2015 
Trigonometry
A point on the rim of a wheel of unknown radius in a pulley system has a velocity of 16 in/min. The wheel is making 4 rpm. If the radius of the other wheel is 8 inches, find the 8" wheel's rpms and the unknown wheel's radius. I got a radius of about 0.637"
asked by MB on February 13, 2017 
algebra
1. How to find the numbers, if there are any, at which f has a realtive minimum. What is the realive minima? The graph that I have looks like W, it has point at 1 on the x axis, 1 on the y axis, and 1 on the x axis. Choices that I have: a. f has a
asked by Josie on September 1, 2007 
English check
Read the following passage from the Odyssey: Tell me, where was it, now, you left your ship— around the point, or down the shore, I wonder?’ He thought he’d find out, but I saw through this, and answered with ready lie: Poseidon Lord, who sets the
asked by Delia on February 4, 2015 
essay research
For my language arts class, I have to write about whether or not we agree with the idea of spanking children. I agree with the idea, but I need help with research on the topic, as I cannot find some noteworthy websites. This essay is due the day after
asked by Emily on March 14, 2007 
trigonometry
I wont be receiving credit for these problems but i was just wondering how would i answer them... A) The area of a sector of a circle with a central angle of 25π rad is 21 mm². B) The angle between 0 and 2π in radians that is coterminal with the angle
asked by Michael on April 13, 2015 
Algebra 2
would some one please check these for me 1. divide x^236y^2 over 5x^2+30y divide (x^26xy) A: x+6y over (5x)(x^2+6y) 2. Add. Express your answer in simplest form. 2x 0ver x^2+15x+54 + 4over x+6 A: 6 over x+9 3. solve: (9 over x5) 1= 8 over x+5 A: 10
asked by Ray on June 2, 2007 
PreCalc
y =( (CA)/2 ) sin( (X  (A  ( (C  A)/2 ) ) )( pi/(CA) ) ) + (B  ( (BD)/2 ) How do I rearange this for this equation for the all of the variables including A, B, C, D, X were pi is the greek leter pi if you didn't notice this is the general formula
asked by Jo on December 7, 2009 
Physics Gravitation Question
Vesta, a minor planet in the Asteriod Belt between Mars and Jupiter, has a mean radius of 525 km and mass of 2.59 X 10^20 kg. The Dawn Spacecraft (m = 1240 kg) orbited Vesta in 2011 & 2012. Find the local acceleration due to gravity at the mean surface of
asked by Anon on November 5, 2016 
math
The wheel on a child's bicycle is 48 cm in diameter. To test the strength of the tire, William lifts the back wheel 1 m from the ground and spins it at 36 turns/min. He attached a blue sticker to the bottom of the tire beforehand. Assuming that William
asked by Nadia on February 28, 2010 
Calculus
relative extrema x^42x^2+5 so far I know how to find the derivative which is 4x^32x now I am stuck... Please help Huh? 4x^32x=0 2x(2x^21)=0 and what are the roots? I will give you a hint: one is x=0 The other two are in the second parenthesis. Is it
asked by dee on March 9, 2007 
Trig
When the angle of elevation of the sun is 61°, a telephone pole that is tilted at an angle of 8° directly away from the sun casts a shadow 20 feet long. Determine the length of the pole to the nearest foot. I'm stuck halfway through this problem, I
asked by Seth on March 5, 2017 
Career
1.)When considering a postsecondary option, you should consult which of the following sources? A.)Your internal motivation B.)Family & friends C.)Reference Materials D.)All Of Above 2.)Sarah needs to complete financial aid packets. According to this unit,
asked by YRN DJ on November 12, 2015 
Physics
Three positive point charges are arranged in a triangular pattern in a plane as shown. + 2 nC + 4 nC + 6 nC Distance between all: 7 m I don't know how to d this part: Find the magnitude of the net electric force on the 4 nC charge. The Coulomb constant is
asked by asd on May 1, 2015 
Math
A car manufacturer has 96 cars to paint. Each batch of paint can paint 12 cars. Which equation can be used to find b, how many batches of paint the manufacturer needs to paint all the cars? f) b/12 = 96 g) b/96 = 12 h) 12/b = 96 i) 96/b = 12
asked by Mia on March 16, 2012 
math
A car manufacturer has 96 cars to paint. Each batch of paint can paint 12 cars. Which equation can be used to find b, how many batches of paint the manufacturer needs to paint all the cars? f) b/12 = 96 g) b/96 = 12 h) 12/b = 96 i) 96/b = 12
asked by Mia on March 17, 2012 
L>A
CAN SOMEONE FIND ME A TIME LINE ABOUT AVI? (Avi is a famous writer) THANk YOU!! HAPPY SB07 You should be able to construct a timeline using the dates and Avi's ages by reading this site. http://content.scholastic.com/browse/contributor.jsp?id=3262 Here is
asked by Lance on April 10, 2007 
Physics
A 7.68 m, 132 kg uniform ladder rests against a smooth wall. The coefficient of static fric tion between the ladder and the ground is 0.642, and the ladder makes a 48.4◦ angle with the ground. How far up the ladder can a 528 kg person climb before the
asked by Youthers on December 7, 2014 
statistics
A maker of tires for cars has a multitude of data to support the fact that the lifetime of their tires follows a normal distribution with a mean of 42,100 miles and a standard deviation of 2,510 miles. Find the probability that a randomly selected tire
asked by Tanya on May 9, 2008 
Physics
The angular position of a particle that moves around the circumference of a circle with a radius of 5m has the equation: theta = a*t^2 Where a is constant. theta is in radians t is in seconds Determine the total acceleration and its intrinsic components
asked by Leslie on November 11, 2012 
physics
A man holds a 194N ball in his hand, with the forearm horizontal (see the figure). He can support the ball in this position because of the flexor muscle force , which is applied perpendicular to the forearm. The forearm weighs 24.7 N and has a center of
asked by macy on July 16, 2013 
mathalgebra please help
The line y=0.15x+0.79 represents an estimate of the average cost of gasoline each year. The line 0.11xy=0.85 estimates the price of gasoline in January of each year (“Consumer price index,” 2006). a. Do you expect the lines to be intersecting,
asked by Michelle on July 6, 2010 
math 116 appendix e
4. The line y=0.15x +0.79 represents an estimate of the average cost of gasoline each year. The line 0.11xy=0.85 estimates the price of gasoline in January of each year (“Consumer price index,” 2006). a. Do you expect the lines to be intersecting,
asked by sandy on July 15, 2010 
Projectile
An enemy plane is flying horizontall at a distance of 2.0km with a speed of 340m/s.An army man with anticraft gun on the ground sight the enemy with a muzzle speed at 60m/s .when the enemy plane is directly overhead.find a)at what angle from the verticals
asked by Skykid on January 16, 2016 
8.01x Classical Mechanics
Sliding Blocks (14 points possible) A small cube of mass 1.0 kg slides down a circular and frictionless track of radius 0.6 m cut into a large block of mass 4.0 kg as shown in the figure below. The large block rests on a horizontal and frictionless table.
asked by Anonymous on January 11, 2014 
maths
Felicity has just commenced work and is investigating superannuation funds. She calculates that she will need $1 000 000 in her fund when she retires in 40 years. She finds a fund guaranteeing to pay interest on each deposit at a rate of 6% per annum
asked by gscc on June 14, 2016 
physics
A hawk is flying horizontally at 14.0 m/s in a straight line, 250 m above the ground. A mouse it has been carrying struggles free from its grasp. The hawk continues on its path at the same speed for 2.00 s before attempting to retrieve its prey. To
asked by Anonymous on February 16, 2011 
Math Question
Hello! I have a question about a word problem: A garden supply store sells two types of lawn mowers. The cashiers kept a tally chart for the total number of mowers sold. They tallied 30 mowers sold. Total sales of mowers for the year were $8379.70. The
asked by Beka on November 20, 2013 
Chem
Suppose that the 10.0 g of NH3 is formed in a bomb calorimeter, and that all of the evolved heat for the exothermic reaction is completely absorbed by the surrounding 1000 g of water. Find the change in temperature (ΔT), and the final temperature (TF) of
asked by Feather on October 20, 2014 
civics
I cannot find the answer to this question. In which local areas is the problem of balancing funding and services uasually most severe? a. rural areas, b. suburban areas, c. cities, d counties. I am guess the answer is D because the book states "local
asked by Tiffany on April 26, 2010 
maths
Felicity has just commenced work and is investigating superannuation funds. She calculates that she will need $1 000 000 in her fund when she retires in 40 years. She finds a fund guaranteeing to pay interest on each deposit at a rate of 6% per annum
asked by gscc on June 13, 2016 
chemistry
A 25.00 mL sample of 0.4 M dimethylamine (CH3)2NH is titrated with 0.150 M HCl. What is the pH at the halfequivalence point? Not sure what to do here exactly, I'm bad with the titration problems. I know there are normally a couple tables (finding the
asked by 1/2 equivalence point on July 30, 2011 
ChEM ASAP PLZ
n the water gas shift reaction (below, unbalanced), equal masses of methane and water were placed in the reactor and the total mass of the reactants was 274 kg. _______ CH4 (g) + _______ H2O (g) → _______H2 (g) + _______ CO2 (g) Given: MW of CH4 is 16.04
asked by Anonymous on December 13, 2017 
physics
The tallest volcano in the solar system is the 18 km tall Martian volcano, Olympus Mons. An astronaut drops a ball off the rim of the crater and that the free fall acceleration of the ball remains constant throughout the ball’s 18 km fall at a value of
asked by Anonymous on October 1, 2011 
algebra
A landscaper is designing a flower garden in the shape of a trapezoid. She wants the shorter base to be 3 yards greater than the height and the linger base to be 7 yards greater than the height. She wants the area to be 295 square yards. The situation is
asked by Lee on November 1, 2012 
Math
"A tank holds 1000L of water, which takes an hour to drain from the bottom of the tank, then the volume V of water remaining in the tank after t minutes is: V = 1000(1(t/60))^2 where t is between 0 and 60 inclusive. Find the rate at which the water is
asked by Stuck on February 7, 2010 
Tough Math
Suppose the ball was 3.24 feet above ground when it was hit, and that it reached a maximum height of approximately 102.51 feet when it had traveled a ground distance of approximately 214.26 feet. The ball lands after traveling a ground distance of
asked by HUNU on January 23, 2012 
Statistics
In a population of 240 women,the heights of the women are normally distributed with a mean of 64.2 inches and a standard deviation of 3.2 inches. If 36 women are selected at random, find the mean mu x and stand deviation sigma x of the population of sample
asked by Joe on November 8, 2011 
maths
Shyam wishes to determine the distance between two objects A and B but there is an obstacle between the two objects which prevents him from making a direct measurement. He design an ingenious way to overcome this difficulties. First, he fixes a pole at a
asked by naincy on September 3, 2016 
phyics
A 1390N uniform beam is attached to a vertical wall at one end and is supported by a cable at the other end. A 1960N crate hangs from the far end of the beam. Using the data shown in the figure, find (a) the magnitude of the tension in the wire and the
asked by LLYOD BLUE on November 12, 2013 
Calculus
Mr. Cook was painting Arvada West High School, standing on top of a 25]foot ladder. Why? We will never know. However, he was horrified to find the ladder being pulled away by the same notorious student that threw a snowball at Mrs. Evans. The base of the
asked by Thomas on November 6, 2011 
Physics
You are standing on a fish pond wishing to catch a fish. How would you aim your fish gun in order to catch a fish which your eyes could see 20 cm below the surface of water ? will u aim higher , lower or exactly on the location of the fish as seen by your
asked by AJ on July 27, 2014 
Math
a. Do some research and find a city that has experienced population growth. Determine its population on January 1st of a certain year. Write an exponential function to represent the city’s population, y, based on the number of years that pass, x after a
asked by Cozy on October 12, 2015 
Pre Calc Repost
I already asked this, but I didn't really understand the answer I got. I got the general idea, but I don't have a good enough understanding to answer the question. Writing to Learn: In a certain video game a cursor bounces back and forth horizontally
asked by Taylor on March 20, 2011 
English
What does this paragraph meanwhat did Martin Luther abominate? "For when we have laid bare our conscience to our brother and privately made known to him the evil that lurked within, we receive from our brother's lips the word of comfort spoken by God
asked by Maggie R. on September 24, 2007 
geography
okay, ive got like 9 questions! but i could not find them! 1) Loch Ness: Scotland:: Lake of Lucerne: ? 2) Alexander Grahm Bell: ? :: Florence Nightingale: Italy 3) Queen Victoria: Prince Albert:: Queen Elizabeth 11: ? 4) Mozart: ? :: Michelangelo: Italy 5)
asked by tori on March 5, 2008 
Advanced Dynamics and Relativity
A point mass m is connected by a massless rod of length L to a ﬁxed point of support, such that the mass is free to rotate about the support in any direction under the inﬂuence of gravity. (a) Construct a Lagrangian in terms of suitable generalised
asked by Darcy on June 3, 2013 
Physics
An intravenous blood plasma drip enters a vein in the patient’s arm from a bag raised a height h above the vein. If the diameter of the 5 cm long needle is 0.5 mm, use Poiseuille's law to find the height h that results in a 5 cm3/min flow rate. (Assume
asked by Jacob Dover on January 18, 2013 
Chemistry
In a lab we did potentiometric titrations with a mixture of NaCl/KI and AgNO3. We plotted a titration curve and found the 2 endpoints which indicate where I is and where Cl is. We are looking to find the concentration of both of the halides present, and we
asked by Johnathan on April 9, 2010 
algebra
the speed of a passenger train is 6 mph faster than the speed of a freight train. The passenger train travels 330 miles in the same time it takes the freight train to travel 300 miles.Find the speed of each train.
asked by milton on May 5, 2015 
Chemistry
Find the concentration of the polyprotic weak acid given the following:  1 equiv needs 6 ml NaOH, 2 equiv needs 18 ml NaOH, 3 equiv needs 28 ml NaOH  pKa1 = 2, pKa2 = 3.9, pKa3, 10  Molarity of NaOH = 0.175  Total volume of NaOH = 28 ml  Volume of
asked by OR on October 7, 2013 
Algebra
The speed of a passenger train is 20 mph faster than the speed of a freight train. The passenger train travels 250 miles in the same time it takes the freight train to travel 150 miles. find the speed of each train.
asked by Francessca on June 3, 2011 
Chemistry
Find the concentration of the polyprotic weak acid given the following:  1 equiv needs 6 ml NaOH, 2 equiv needs 18 ml NaOH, 3 equiv needs 28 ml NaOH  pKa1 = 2, pKa2 = 3.9, pKa3, 10  Molarity of NaOH = 0.175  Total volume of NaOH = 28 ml  Volume of
asked by OR on October 7, 2013 
Genetics
One fruit fly is heterozygous for long wings, and another fruit fly is homozygous for short wings. Long wings are dominant to short wings. Using a punnett square, find out what percent of the offspring are expected to have short wings.
asked by Student on February 1, 2015 
physics
A box is placed 50 cm away from a double convex lens. The image is on the opposite side of the lens, is inverted and 50 cm away from the lens. find: a)the focal length of the lens. b)the height of the image. c) using the focal length that you found, how
asked by kate on May 30, 2013 
another math
At a distance of 34 feet from the base of a flag pole, the angle of elevation to the top of a flag is 48.6°. The flag itself is 5.1 feet tall. The angle of elevation to the bottom of the flag is 44.6°. The pole extends 1 foot above the flag. Find the
asked by Anonymous on January 9, 2014 
Math
The The speed of a passenger train is 12 mph faster then the speed of a freight train. The passenger train travels 270 miles in the same time it takes the freight train to travel 210 miles. Find the speed of each train.
asked by Debbie on February 14, 2008 
algebra
A 3 by 5 inch picture is put into frame with a mat that has width x. Draw picture inside the frame, write the expression of the width and length of the frame AND the picture together. If the total area of the frame with the picture is 35 in ^2, find the
asked by Mark on March 30, 2016 
algebra
The speed of a passenger train is 16 mph faster than the speed of a freight train. The passenger train travles 300 miles in the same time it takes the freight train to travel 220 miles. find the speed of each train
asked by todd on June 22, 2012 
contemporary mathematics
A passenger train travels 392 miles in the same time that it takes freight train to travel 322 miles. If the passenger train travel 20 miles per hour faster than the freight train.Find the rate of each train.
asked by Fe on December 8, 2015 
Chemistry
I saw that this was posted earlier but i can't find the previous one with the answer. Please Help. I don't understand how to make this equation work The total pressure in a flask containing air and ethanol at 257C is 878 mm Hg. The pressure of the air in
asked by Amy on February 1, 2008 
physics
Rutherford fired a beam of alpha particles (helium nuclei) at a thin sheet of gold. An alpha particle was observed to be deflected by 90.0°; its speed was unchanged. The alpha particles used in the experiment had an initial speed of 2.2 ✕ 10^7 m/s and a
asked by Anonymous on April 11, 2018 
maths
The rectangular coordinates of a point are given (5,5root3). Find polar coordinates of the point. Express theta in radians. Answer must be in form (Type an ordered pair. Type an exact answer in terms of pi.Use integers or fractions for any numbers in
asked by Asfand on November 28, 2016 
MATH
E LARGEST PYRAMID IN THE U.S. IS THE LUXUR HOTEL IN VEGAS. THE VOLUME OF THIS HOTEL IS 28,933,800 OR ABOUT 29 MILLION CUBIC FEET. THE HEIGHT OF THE PYRAMID IS 148 FEET LESS THAN THE LENGTH OF THE BUILDING. THE BASE OF THE BUILDING IS SQUARE. FIND THE
asked by HOPE on March 10, 2008 
Physics
The hydrogen atom contains a proton, mass 1.67 1027 kg, and an electron, mass 9.11 1031 kg. The average distance between them is 5.3 1011 m. The charge of the proton is the same size, opposite sign of the electron. a)What is the magnitude of the average
asked by Susan on January 13, 2008 
Math
Sometimes scale drawings are shown on graph paper. Each square on this graph paper is 1/4 inch. Use the scale drawing of the living room to answer each question. There are 1,296 in.2 in one square yard. Use a proportion to find out how many square yards of
asked by Deborah on November 5, 2012
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