Wednesday
March 29, 2017

# Posts by andrew

Total # Posts: 1,165

Math
Method C? It's seems to be less biased since it's randomly chosen
March 19, 2017

Math
Predicted winner in an election for town mayor . Method C: Telephone 100 randomly-chosen voters who live in the town. 54 percent plan to vote for the incumbent mayor. Method D: Telephone 70 people who have lived in the town for more than 25 years. 45 percent plan to vote for ...
March 19, 2017

Math
Perimeter (p) = 200cm 2(L+B)=200 Length (L)= (16+x)cm Solution substitute 2(16+x)=200 32+2x=200 2x=200-32 2x=168 divide both sides by 2 2x=168 2x/2=168/2 x= 81 Remember, Length(L)= 16+x 16+81 Length=97cm 2(L+B)=200 2(97+B)=200 divide both sides by 2 2(97+B)/2=200/2 (97+B)= 100...
March 11, 2017

6th grade math (student)
Yes. I didn't know I was to assume that she answered all 20 questions correctly. Thank you!
March 8, 2017

On a math quiz, Mary scored 3 points for each of the 12 multiple choice questions she answered correctly, and 5 points for each of the 8 free response questions she answered correctly. What was the total number of points Mary scored?
March 8, 2017

it
Of course.
March 8, 2017

Mathematics
There are 4 sides to a square. So, ideally the equation would be written as 20/4 = ? Seeing as how 20 is the entire length of the square. 20/4 = 5
March 8, 2017

Math
Ever tried wolfram alpha? The answer to your equation here though I've figured is 480. 48 possible arrangements of women to their roles and 10 to the men, in such a situation. to find the possible arrangement for the two combined we must then multiply as each combination ...
March 8, 2017

math
There are 3 red balls and 7 blue balls in Bowl A, and 8 red balls and 2 blue balls in Bowl B. Mandy rolls a die and if a prime number is up, Bowl A is selected; otherwise Bowl B is selected. Then Katie draws a ball randomly from the selected bowl. Find the probability of Bowl ...
February 20, 2017

Physics
A 1140 kg car traveling south at 24 m/s with respect to the ground collides with and attaches to a 2550 kg delivery truck traveling east at 16 m/s.
February 13, 2017

Probability, Stats
For every 1000 batteries produced by a manufacturer 15 are defective. What is the probability that 100 randomly chosen batteries will have exactly 2 defective batteries?
January 29, 2017

Chemistry
I did again, using (molecular weight 16.0) and (atomic weight 40.0), instead of the molar masses to convert from g to mol and I used a 50g imaginary sample. It is pretty close to 500. torr, maybe just a rounding error?
January 22, 2017

Chemistry
A gas mixture consists of equal masses of methane (molecular weight 16.0) and argon (atomic weight 40.0). If the partial pressure of argon is 200. torr, what is the pressure of methane, in torr? I am coming out with 443torr, but the listed options are 80.0 torr b. 200. torr c...
January 22, 2017

Chemistry
A gas mixture consists of equal masses of methane (molecular weight 16.0) and argon (atomic weight 40.0). If the partial pressure of argon is 200. torr, what is the pressure of methane, in torr?
January 22, 2017

Math
There are 132 people seated in the school auditorium for an assembly.  There are 6 rows in the auditorium, each with the same number of seats.  If the auditorium is completely filled, how many seats are there in each row?
December 21, 2016

math
use a arrow notation to write a rule for this translation (2,1) (5,3) (-1,4) ?
December 6, 2016

language arts
1. which of the following sentence contains a linking verb ? A. Teresa wore her fav shoes today. b. her shoes look really comfortable c. she put them on with striped socks d. Teresa walked for hours without a complaint ! I'm not sure whts the answer , I think its A or b , ...
December 4, 2016

math
2. is D n 4. is b , wht is 3 n 1?
December 1, 2016

math
1. determine which order pair is a solution of y = -5x + 10 A. (-15,5) **** B. (2,0) C. ( -1 , -5 ) D. (3, 25 ) 2.on which of the following lines does the point ( 7,1 ) lie? A. y-5x = 4 B. y=x -10 C. y = -4x +3 *** D. y + -x +8 3.find the slope of the line through ( -9 , -10...
December 1, 2016

math
Four friends contribute sums of money to a charitable organization in the ratio of 2:4:5:7. if the largest amount contributed is \$1.40, calculate the total amount contributed used by the four people?
November 23, 2016

Chemistry
Before small batteries were available, carbide lamps were used for bicycle lights. Acetylene gas, C2H2, and solid calcium hydroxide were formed by the reaction of calcium carbide, CaC2, with water. The ignition of the acetylene gas provided the light. Currently, the same lamps...
November 22, 2016

Chemistry
A sample of carbon monoxide was collected over water at a total pressure of 752 torr and a temperature of 15°C. What is the pressure (in torr) of the carbon monoxide?
November 21, 2016

math-mechanics 1
i solved a)u=2i and b)r=2t+1/2[-0.4(i) 0,2(j)] at c) i don t have idea how to solve At time t = 0, a small boat is at a buoy travelling due east with speed 2 ms?1 . The boat experiences a constant acceleration of (– 0.4i + 0.1j) ms?2 . The unit vectors i and j are ...
November 21, 2016

math
A girl swims across a river. When she swims in still water, she swims at 1.25 m/s, the river flows parallel to its banks at v m/s. The girl aims to swim upstream at angle ? degrees parallel to the river bank so that her resultant velocity of 1 m/s is along AB, perpendicular to...
November 20, 2016

Chemistry
How many milliliters of water at 25.0°C with a density of 0.997 g/mL must be mixed with 165 mL of coffee at 91.0°C so that the resulting combination will have a temperature of 62.1°C? Assume that coffee and water have the same density and the same specific heat (4....
November 15, 2016

Chemistry
Calcium oxide, or lime, is produced by the thermal decomposition of limestone in the reaction CaCO3(s) arrow CaO(s) + CO2(g). What mass of lime can be produced from 2001.2 kg of limestone?
October 31, 2016

Chemistry
For the reaction HCl + NaOH → NaCl + H2O, how many moles of hydrochloric acid are required to produce 281.0 g of water?
October 31, 2016

math
At a sports festival half the number of people that chose basketball, chose football. The number of students who chose basketball was a quarter the number of students who chose baseball. There were 84 more students who chose baseball than soccer. How many chose basketball?
October 29, 2016

Math
Two 2 1/2 inch plastic strips and two 5 1/3 inch plastic strips are used to form a rectangle. What is the Perimeter of the rectangle?
October 18, 2016

Physics
A 1.55 m tall person lifts a 1.80 kg book off the ground so it is 1.95 m above the ground. A.) What is the potential energy of the book relative to the ground? B.) What is the potential energy of the book relative to the top of the person's head?
October 16, 2016

Chemistry
In order to determine the concentration of a solution of Carbonic Acid (H2CO3), a sample was placed in a buret and titrated with 0.1132 M Sodium hydroxide. For the carbonic acid, the initial reading was 11.0ml and final reading was 31.0 ml. For sodium Hydroxide, the initial ...
October 14, 2016

Maths
The sum of 26 and a number equals 3 times the number Have to define a variable ,then write equation
October 4, 2016

Math
70*20*20
October 1, 2016

math
Kyle and Andrew decide to make some money by raking leaves in their neighborhood. The houses in their neighborhood each have half acre lawns. Kyle and Andrew each start by raking the leaves from their own yards. Kyle realizes it takes him 3 hours to rake one yard and Andrew ...
September 30, 2016

Physics (Mechanics)
A bat makes contact with a ball 0.8 meters above the ground. The ball then travels with a speed of 22 m/s, moving up. How high does it go?
September 17, 2016

Psychology
China and Singapore are examples of what type of economies?
September 12, 2016

Math
Given 800 matches, what is the largest figure in the series(ie what value of n) that you could construct and how many matches would you have left over at the end?
September 12, 2016

Algebra
Hey! I need some help with this question! I totally forget how to do these types of problems! 1 over 2.75 = 1 over 3.2 - 1 over x ( 1/2.75 = 1/3.2 - 1/x) / = fraction bar
August 22, 2016

control structures
A store uses the following policy to award discount. If the customer purchases products costing more than ksh 30,000 she is given a discount of 10%, otherwise she is given a discount of 2%. Write a complete C++ program that allows a user to input the total value of purchases ...
August 21, 2016

COM 425
Organizational innovation is a planned and direction change intended to 1) get an advantage over the organization's competition 2) improve the organization's upper hierarchy 3) address problems and improve organizational performance 4) dismantle organizational rules ...
July 29, 2016

Math
Which letter on the number line above represents 6?
July 27, 2016

Math
Then there would 9 and 2/5 pieces left.
May 12, 2016

Computer science
How is creating a virtual ecosystem similar from the real world?
May 8, 2016

Msth
The first 10 miles of a taxi ride for free each additional mile cost \$0.45 John takes a taxi ride across town and it's a driver \$4 write an expression to represent the cost of M miles
May 5, 2016

Math
The number of blocks has nine in the ones place the numbers in the hundreds place is one more than the number in the tens place there are two numbers equal 11 how many block are there
April 28, 2016

Algebra
A farmer has 20 acres to plant in wheat and barley. He has to plant at least 15 acres. Wheat costs \$200 per acre to plant and barley costs \$150 per acre, and the farmer has only \$2400 to spend. If the estimated profit of an acre of wheat is \$450 and the estimated profit of an ...
March 24, 2016

Algebra
Bakery has bought 250 pounds of muffin dough. They want to make waffles or muffins in half-dozen packs out of it. Half a dozen of muffins requires 1 lb of dough and a pack of waffles uses 3/4 lb of dough. It take bakers 6 minutes to make a half-dozen of waffles and 3 minutes ...
March 24, 2016

Algebra
The first group was responsible for making 160 suits while the second group was responsible for making 25% fewer suits in the same amount of time. The first team made 10 more suits each day than the second team and finished its job 2 days before the deadline date. How many ...
March 22, 2016

Algebra
A tourist traveled on a motorboat against the current for 25 km. And then returned back on a raft. In the boat the tourist traveled for 10 hours less than on the raft. Find the speed of the current if the speed of the motorboat in still water is 12 km/hour.
March 22, 2016

Algebra
A ship traveled 150 km with the current, and then turned around and traveled back, spending 5h and 30 min on its trip. Find the speed of the current if the speed of the ship in still water is 55 km/hour.
March 22, 2016

Algebra
A train covered the distance of 400 km between A and B at a certain speed. On the way back it covered 2/5 of the distance at that same speed and then it decreased its speed by 20 km/hour. Find the speed of the train at the end of its journey from B back to A, if the entire ...
March 22, 2016

Algebra
An automobile covered the distance of 240 km between A and B with a certain speed. On its way back, the automobile covered half of the distance at the same speed and for the rest of the trip he increased his speed by 10 km/hour. As a result, the drive back took him 2/ 5 of an ...
March 22, 2016

politcal science
March 20, 2016

Math
The units digit of a two-digit positive integer is 4. If the tens digit and units digit of the number are switched, the new number is 45 less than the original number. What is the sum of the original and the new number?
March 17, 2016

Algebra 2
Log base 5 of 16 cubed. Times log base 11 of 6 squared. Equals logx.
March 4, 2016

Geography and Society
Actually, it's "areas near the poles". I just took the quiz. Also, you know this, because near the poles, it's colder, so all the moisture in the air freezes, making very, very, very dry.
March 1, 2016

Algebra
identify the initial amount a and the growth factor b in the exponential function g(x)=14*2^x a=14, b=x a=14, b=2 a=28, b=1 a=28, b=x
February 29, 2016

L.O
Nobody can answer this question but you. What do you think it is?
February 27, 2016

SCIENCE
what is the question you are asking?
February 27, 2016

English
Thanks Ms. Sue! You are a great help!
February 27, 2016

English
hi I need help with this. It is a section from the story 'The Sniper' and it is a PEE (Point, Evidence, Explanation) question... PLEASE HELP ME. Here is the question: "The writer says that the sniper's eyes had 'the cold gleam of the fanatic' what does...
February 27, 2016

English
What i do is i look for historical events for example example World War 2 and i write about that
February 27, 2016

Math
How do you find the point of intersection(s) for x = 2y2 + 3y + 1 and 2x + 3y2 = 0 A) You cannot find points of intersections for non-functions. B) Plug in 0 for x into both equations and solve for y. Then plug that answer back into the other equation to find the corresponding...
February 12, 2016

Algebra
substitute 12=-4(5)+3 -20+3 12=-17 is not true
February 9, 2016

physics
session.masteringphysics. com/problemAsset/1187768/5/P4-80.jpg
February 9, 2016

physics
A 71.0 kg patient is suspended in a raised hospital bed as shown in the figure. The wire is attached to a brace on the patient's neck and pulls parallel to the bed, and the coefficients of kinetic and static friction between the patient and the bed are 0.500 and 0.800, ...
February 9, 2016

Science
If an astronaut with a tool belt accidentally pushed off from the shuttle, how could the tools in the belt be used to return the astronaut to the shuttle?
February 2, 2016

Math
What's another way you can write 0.023 (fraction or percent) problem: write 0.023 two different ways
January 27, 2016

english 1
Which sentence from the passage best supports the conclusion that the author was influenced by Amaterasu?
January 21, 2016

Math
Find two consecutive odd integers such that the square of the larger is one less than twice the square of the smaller.
January 12, 2016

Physics
A force F = 119 N acts at an angle α = 31◦ with respect to the horizontal on a block of mass m = 22.5 kg, which is at rest on a horizontal plane. The acceleration of gravity is 9.81 m/s 2 . If the static frictional coefficient is µs = 0.72, what is the force ...
January 11, 2016

math
7x-3y=41 2x=-5y Solve using augmented matrix What do i do?
January 4, 2016

Math
\$10,000 invested. part at 3% and part at 6% for a period of 1 year. how much was invested in each account if the interest earned in the 6% account was \$357 greater than the 3% account?
December 20, 2015

Math
Sorry I remembered it wrong. Here it is again. A candy machine contains 5 times the number of nickels in dimes and 16 less than the number of nickels in quarters. How many of each are there?
December 15, 2015

Math
A candy machine contains 5 times the number of nickels in dimes and is less than 16 the number of quarters. Total value is \$12.80. How many are there nickels and dimes? I can't understand what means 5 times the number of nickels in dimes. How do you put nickels in dimes? ...
December 15, 2015

Math
90 members of a sport club plays at least one of the game tennis,football and volleyball,10 plays tennis and football,19 play football and volleyball and 29 plays tennis and volleyball.x people plays all the 3 games,while x people each play only one game how many play football...
December 8, 2015

Math
A river flows at the speed of v from west to east. How should a man who is at a point A of the southern bank of the river, which is d meters away from the river, and wants to reach a point B on the northern bank of the river, which is 2d meters away from the river, choose his ...
December 7, 2015

College of Medicine ;University of Malawi
what is the ph at 25 degrees Celsius of a solution made by dissolving a 5.00 grain tablet of aspirin in 0.500 litres of water? The tablet contains 0.325g of the acid HC9H7O4. ka=3.3*10^-4mm=180.2g/l
December 3, 2015

Physics
Szymon and Chris fly their balloon around the earth in 80 days. Taking the radius of the earth to be 6400 km, calculate their average speed in m/s. I did answered all the homework questions but I didn't know how to do this one?
November 21, 2015

Kids kingdom school
Perimeter= adding all outside sides. A carpet is square one is 15cm and the other is 12cm and because its square the other side will be the same since it's parallel 15+15+12+12= 30 + 24 = 54
November 21, 2015

Programming
Write a program that inputs (from the user) the number of hours worked and hourly rate for employees and outputs the total pay. The program should process an arbitrary number of employees; the user will terminate input by entering 0 hours worked and pay rate. Use a class ...
November 1, 2015

Chemistry
Calculating theoretical yield and percentage yield from preparation of 4-acetoxybenzoic acid from the interaction of 4-hydroxybenzoic acid and sulphuric acid
October 28, 2015

Chemistry
1. Explain in terms of rate laws and/or reaction quotients why the product’s low solubility favors the forward reaction over the reverse. The forward rate law is rate = k[maleic acid]n and the reverse rate law is: rate = k[fumaric acid]n. Consider how the rate laws are ...
October 25, 2015

Chemistry
What would happen to the peaks on your chromatogram for substances that do not separate?
October 19, 2015

chemistry
What would happen to the peaks on your chromatogram for substances that do not separate? How are transmittance values are affected by the amount of sample on your salt plate?
October 19, 2015

Math
How could you use the product of 108 and 4 to find the product of 324 and 4
October 13, 2015

Pre-calculus
Steve your calculations/formulas are wrong they do not work for continuous compounding sorry
October 11, 2015

physics
When landing after a spectacular somersault, a 40.0 kg gymnast decelerates by pushing straight down on the mat. Calculate the force she must exert if her deceleration is 5.00 times the acceleration of gravity.
October 3, 2015

math
can you solve expressions that have the same variables, but are in a different order? For example: 36jkm - 36mjk
October 1, 2015

chemistry
Recrystallization Lab What are the potential consequences of using a spatula to scrape crystals from wet filter paper during filtration?
September 30, 2015

Math
my son was asked to find each product by factoring the tens, and to draw rectangles if needed to on 6x2, 6x20, and 6x200. I'm not sure how to do this. please help me
September 28, 2015

Physics-Trajectory
Plug it in
September 11, 2015

Accounting
Department S had no work in process at the beginning of the period , 18,000 units were started during the period, 2,000 units were 30% completed at the end of the period, and the following manufacturing costs were debited to the departmental work in process account during the ...
September 3, 2015

physical science
If the park is 360 meters wide and the tram takes 6 minutes to get to the other side, how fast is it moving?
August 26, 2015

Physics
A length of copper wire is shaped into a single circular loop of circumference 63 cm, similar to that shown in the picture below. A magnetic field of strength 0.50 T is parallel to the normal of the loop. The copper wire has a resistance of 2.5 x 10-2 Ω. The ends of the ...
August 14, 2015

Economics
If switching to fast replenishment compared to holding inventory in a dc (distribution center). Is this: Operational? Tactical? or Strategic?
August 12, 2015

physics
A small truck runs off the road and over a 100metre high cliff. It lands 50 metre from the base of the cliff. How long did it take for the truck to hit the ground
June 20, 2015

physics
A stationary pool ball with mass 0.20 kg is struck with an average force of 35 N over a time of 18 ms. What speed does it have just after impact?
May 27, 2015

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