Wednesday

February 10, 2016
Total # Posts: 1,055

**Physical Science**

Which SI unit is used to measure length? A. meters B. newtons C. grams D. liters
*February 9, 2016*

**algebra**

x^2 + x - 12 What is the minimum value of y?
*February 4, 2016*

**algebra**

Determine whether each expression is a polynomial. If it is a polynomial, find the degree and determine whether it is a monomial, binomial, or trinomial. 1. 7a^2b + 3b^2 – a^2b 2. 6g^2h^3k
*February 3, 2016*

**physics **

In a thundercloud there may be an electric charge of 46 C near the top of the cloud and −46 C near the bottom of the cloud. If these charges are separated by about 6 km, what is the magnitude of the electric force between these two sets of charges? The value of the ...
*January 28, 2016*

**Calculus**

Please help me find the limit: lim x--> 2 ((1/3)-1/sqrt(x))/)x-9)
*January 24, 2016*

**math**

what is a prime number?
*January 16, 2016*

**Algebra 1**

A should be correct.
*January 5, 2016*

**Math???Plase Help**

7/9
*January 5, 2016*

**Math**

A group of 21 people have enough food for 24 days. If 15 additional people join them, they would have enough food for only___days. (Assume everyone eats the same amount of food each day)
*January 4, 2016*

**Math**

During its first week of business, a market sold a total of 108 apples and oranges. The second week, five times the number of apples and three times the number of oranges were sold. A total of 452 apples and oranges were sold during the second week. Determine how many apples ...
*December 18, 2015*

**Algebra**

gilbert plans to invest 9% and 11% annually. if he want to earn$1200 annually how much should he invest in each bond.
*December 16, 2015*

**Statistics**

A machine fills 12 ounce bottles with soda. For the machine to function properly, the standard deviation of the sample must be less than or equal to 0.02 ounce. A sample of 8 bottles is selected, and the number of ounces of soda in each bottle is given. At alpha +0.05, can you...
*December 6, 2015*

**Science...anyone?**

Thanks, you saved my grade...um...the Answerer. P.S.: Are you a wiz kid?
*November 30, 2015*

**Science...anyone?**

1. Which of these sources of energy is NOT renewable? a.) wind b.) solar power c.) hydroelectric power d.) natural gas 2. Air can be polluted by _____. a.) tiny particles of soot b.) carbon monoxide c.) sulfuric acid d.) all of the above 3. Which of the following can cause ...
*November 30, 2015*

**Finance**

Homework Help: Finance Posted by Sally on Monday, November 23, 2015 at 8:02pm. The answer given by Finance - Anonymous , Monday, November 23, 2015 at 8:12pm Add the tax to the "before tax" to get the answer was not helpful. I am hoping someone can give me a guided ...
*November 24, 2015*

**Finance**

Anonymous, I still don't understand.
*November 23, 2015*

**Finance**

Jiminy's Cricket Farm issued a 30-year, 7.2 percent semiannual bond 6 years ago. The bond currently sells for 87.5 percent of its face value. The book value of this debt issue is $103 million. In addition, the company has a second debt issue, a zero coupon bond with 9 ...
*November 23, 2015*

**Geometry**

The coordinates of a triangle are X(0,0, Y(2h,2h), and Z(4h,0). Is the triangle a right triangle? Show work to support your answer. I don't really know how to solve this, or show m work.
*November 17, 2015*

**c++ programming **

I need some help with my homework please Write a C++ program to prompts the user to enter the first character of shape name (Cycle, Rectangle, or Triangle). Then calculate the area of that shape. „h If the user enters another character the program should print: You should...
*November 13, 2015*

**math**

x=$106
*November 11, 2015*

**math 6**

Javier solves three math problems in five minutes. He has 20 math skill-work questions for homework, and he wants to complete them before talking with friends. How many minutes will javier take to complete 20 math skill work questions
*November 5, 2015*

**math**

GEOMETRY The formula for the perimeter of a rectangle is P = 2 + 2w, where is the length and w is the width. A rectangle has a perimeter of 24 inches. Find its dimensions if its length is 3 inches greater than its width.
*November 3, 2015*

**math**

Dracula, Frankenstein, Mummy, Gilda and Zelda are all having a Halloween party. Each of them has given an invitation to all of the others. How many invitations have been given out?
*October 28, 2015*

**physics**

Power applied to a particle varies with time as P=(3t^2-2t+1)W. Find the change in kinetic energy between t=1s and 4s.
*October 27, 2015*

**math**

8 - (-n) = 1
*October 21, 2015*

**science**

is tap water a pure substance..?
*October 15, 2015*

**science**

is a polyatomic considered a compound?
*October 15, 2015*

**math**

Aren't we suppose to get rid of the -2 to get x.. by dividing on both sides?
*September 26, 2015*

**math**

3x-2y=8 5x-2y=9 using elimination method.. please help.
*September 26, 2015*

**physics1**

Vector A has a magnitude of 6 and is at an angle of 32.4 degrees measured counter-clockwise from the x axis. Vector B has a magnitude of 12 and is at an angle of 113.8 degrees measured counter-clockwise from the x axis. Vector C has a magnitude of 17 and is at an angle of 180...
*September 24, 2015*

**physics**

Copy of Vector A has a magnitude of 5 and is at an angle of 29.7 degrees measured counter-clockwise from the x axis. Vector B has a magnitude of 12 and is at an angle of 115.4 degrees measured counter-clockwise from the x axis. Vector C has a magnitude of 18 and is at an angle...
*September 24, 2015*

**Calculus 3! ASAP please**

Also, I do not understand how to add magnitudes. Please help. Let u and w be vectors in R3 such that ||u||=3 and ||w||=2 and the angle between the vectors is pi/2; what is the value of ||3u-4w||? - answer is sqrt(145)
*September 22, 2015*

**Calculus 3! ASAP please**

1.A given line is described by the system of equations x=2t+7; y=-3t+4; z=5-t; find the equation of a line parallel to the given line and which contains the point (1,1,0). 2.Let a=<0,6,2> and b=<0,2,4>, then the component of a parallel to b is given by? - the ...
*September 22, 2015*

**Algebra 2**

Did I solve this complex rational expression correctly? (2/3)-(x)/(2/3)+(x) 2/3-x = 2/3-x(3)/1(3)= (-x)+(2/3) (2/3)+ (x)= 2/3 + x(3)/1(3)= (x)+(2/3) (-x)+(2/3)/(x)+(2/3) = -(3x-2)/(3x-2)
*September 12, 2015*

**algebra**

Of Maria's total salary, 1/4th goes to taxes and 2/3rds of what remains goes to food, rent, and bills. If she is left with $500 each month, what is her total monthly salary?
*September 9, 2015*

**English**

how do you write an evaluation for a narrative about Cry Freedom explaining techniques you have used in your narrative(eg. simile, metaphor, structure)???
*August 26, 2015*

**Statistics**

The average mark on an entrance exam was 70%, with a standard deviation of 9.6. In order to be accepted you must get 60% or better. If 800 students wrote the exam how many were accepted?
*May 21, 2015*

**periodic functions**

At time 4 minutes your submarine is at its deepest, y= -1000m. At time 9 minutes you are at your shallowest, y= -200. Sketch the graph. Write the equation. Your sub is designed to cruise below y= -300 meters. At time zero was your submarine at its cruising depth? Between what ...
*May 21, 2015*

**math**

Ava made 100 paper cranes, and Brittany made 3/4 of the number of paper cranes Ava made. Ava gave 9/20 of her paper cranes to Brittany. Then, Brittany gave 1/4 of her paper cranes to Ava. How many more paper cranes did Brittany have than Ava in the end?
*May 21, 2015*

**Math!!! Please help!!!**

Find the coefficient of x^7 for (x-3)^11 Use the binomial theorem to expand (2y-3x)^5 Prove that (n over r)= (n over n-r) for all integers where n is greater than or equal to r and r is greater than or equal to zero Prove that (n over n-2) + ( n+1 over n-1)= n^2 for all ...
*May 17, 2015*

**Mathematics **

Find the coefficient of x^7 for (x-3)^11 Use the binomial theorem to expand (2y-3x)^5 Prove that (n over r)= (n over n-r) for all integers where n is greater than or equal to r and r is greater than or equal to zero Prove that (n over n-2) + ( n+1 over n-1)= n^2 for all ...
*May 17, 2015*

**Trig**

Find sin(s+t) and (s-t) if cos(s)= 1/5 and sin(t) = 3/5 and s and t are in quadrant 1. =Sin(s)cos(t) + Cos(s)Sin(t) =Sin(1/5)Cos(3/5) + Cos(-1/5)Sin(3/5) = 0.389418 Sin(s-t) =sin(s)cos(t) - cos(s)sin(t) =sin(-3/5)cos(1/5) - cos(1/5)sin(3/5) =Sin-3/5 cos-3/5 = -0.46602 HELP ...
*May 7, 2015*

**MATH**

NOT INDEPENDENT A box contains four white, three red, and two black marbles. Three marbles are chosen at random. a. What is the probability that all three are the same color? b. What is the probability that all three are different colors?
*April 28, 2015*

**Math**

Solve this system that is represented by the following matrix. [1 -2 -2| -3 0 5 3| 13 0 0 1| 1] Write answer in (x, y, z)
*April 8, 2015*

**chemistry cp**

so it it letter c?
*April 7, 2015*

**chemistry cp**

The term formula mass is a general term that can be applied to both ionic compounds and molecular compounds because (a) ionic compounds exist as individual molecules (b) molecular formulas are always empirical formulas (c) not all formulas represent individual molecules (d) ...
*April 7, 2015*

**business math**

Anny invests $8,500, at 6% interest, compounded quarterly for 12 years?
*March 31, 2015*

**Math**

Juanita invests $3,500, at 8% interest, compounded annually for 4 years?
*March 31, 2015*

**math**

If Will gives Molly $9, he will have the same amount of money as her. If Molly gives Will $9, the ratio of the money she has to the money Will has will be 1 : 2. How much money does Will have in the beginning?
*March 29, 2015*

**Chemistry**

What will happen to the number of moles of SO3 in equilibrium with SO2 and O2 in the following reaction in each of the following cases? 2 SO3(g) equilibrium reaction arrow 2 SO2(g) + O2(g) ΔH° = 197 kJ (a) Oxygen gas is removed. increase decrease stay the same (b) The...
*March 15, 2015*

**Child Development**

5+5=10 10+10=20 20+20=40 1+1=2 !!!!!!!!!!!!!!!!!:) :) :) :) :) :) :) :) :) :) :) :) :) !!!!!!!!!!!!!!!!
*March 11, 2015*

**MATH**

AJOISRHJEIWHTIHWTPIRUHTEUIHTUIHTREIOGHGGFTGGFFGFGFGFGGRFGFOTOTOTOTOTOOTOTOTTOPTOTOTOOTOOOTOTTOOOTTOOOTOTOTTOVCB CVNCGN
*March 11, 2015*

**math**

Kim and Kent are on opposite sides of a canal, pulling a barge with tow ropes. Kim exerts a force of 50N at 20 degrees to the canal and Kent pulls at an angle of 15 degrees with just enough force so that the resultant force vector is directly along the canal. Find the number ...
*February 24, 2015*

**math**

(1,1) and (13,3) (0,4) and (14,0) What are the coordinates for the intersection of the two lines?
*February 24, 2015*

**math**

hakiim invested 15000 he put part of it in a term deposit that paid 4% per annum and the remainder in a treasury bill that paing 5% per annum after one year the total interest was 690 how much did hakiim invest at each rate
*February 24, 2015*

**Physics**

sorry as in P1=666400 Pa not 666400pa*6
*February 19, 2015*

**Physics**

Hi, just need a little help with this physics question please. A cylindrical tank of water is located 68m deep in water. An air lock at the bottome of the tank allows access. The sailor must wait while the air pressure in the lock is increased until it equals the water ...
*February 19, 2015*

**physics**

The water storage tank has a diameter of 0.5m and contains 150L of water. You find a small hole rusted in the base, with a diameter of 10mm. what is the velocity of the water flowing out of the hole? So, i feel like I need to somehow use both Bernoullis equation and continuity...
*February 19, 2015*

**physics**

The equation given is 2SO2(g)+O2(g)->2SO3(g), and if 224L/h of O2 (at standard temp and pressure) is consumed by the reaction, how much power is produced? I can't go further than P=Work/Time and Work=P times change in V I've tried 224x2-224x3/60^2 but that's not...
*February 19, 2015*

**physics**

Three charged marbles are glued to a nonconducting surface and are placed in the diagram as shown. The charges of each marble are q1 = 5.75 µC, q2 = 1.48 µC, and q3 = −2.47 µC. Marble q1 is a distance r1 = 3.00 cm to the left of the marble q2, while ...
*February 13, 2015*

**math/algebra**

Determine three consecutive odd integers such that three times the middle integer is seven more than the sum of the first and third integers.
*February 6, 2015*

**math**

Below are two pairs of points. A line goes through each pair of points. What are the coordinates for the intersection of the two lines? Show your work. Pair 1 (1,1) and (7,7) Pair 2 (0,8) and (8,0)
*February 4, 2015*

**Math**

Thank you!
*February 2, 2015*

**Math**

Mistyped it should say "10 spoke english & french" not "10 spoke english & frnech"
*February 2, 2015*

**Math**

In a class of students, 80 spoke English, 110 spoke spanish, 100 spoke french, 50 spoke english & spanish, 30 spoke english & french, 20 spoke french & spanish, 10 spoke english & frnech, but no spanish. How many spoke spanish & french, but not english? The answer is 0. I was ...
*February 2, 2015*

**statistics**

A professor gave an aptitude test to a class of psychology students and computed the mean, median, and mode for the test scores. Which of the following statements cannot be an accurate description of the scores? -All of the above statements are false. -The majority of the ...
*February 1, 2015*

**Physics**

An object fired at an angle of 31.9° above the horizontal takes 2.55 s to travel the last 15.5 m of its vertical distance and the last 10.5 m of its horizontal distance. With what speed was the object launched? (Note: This problem does not stipulate that the initial and ...
*January 27, 2015*

**Physics**

You are practicing throwing darts in your dorm. You stand 3.21 m from the wall on which the board hangs. The dart leaves your hand with a horizontal velocity at a point 1.94 m above the ground. The dart strikes the board at a point 1.73 m from the ground. a) Calculate the time...
*January 27, 2015*

**Physics**

How much work is it to push a box (mass 120 kg) up an incline (angle 16 degrees with the horizontal) that is 9.6 meters long, if the coefficient of kinetic friction between the box and the incline is 0.5?
*January 27, 2015*

**stats**

A jar contains 7 black balls and 25 red balls. You take 2 out without replacing them. Find a)the probability of drawing 2 red balls in a row, b) the probability of drawing a red ball, then a black ball, c) the probability that the two balls will be of different colors
*December 18, 2014*

**Algebra ASAP thx**

81
*December 15, 2014*

**chemistry**

How much energy (in kilojoules) is needed to heat 4.00g of ice from -11.0∘C to 21.5∘C? The heat of fusion of water is 6.01kJ/mol, and the molar heat capacity is 36.6 J/(K⋅mol) for ice and 75.3 J/(K⋅mol) for liquid water.
*December 13, 2014*

**Physics/Calc**

A ball is thrown vertically upward from a cliff with a speed of 20 ft/sec. The ball hits the ground at 140 ft/sec. How high is the cliff? v'+-32
*December 12, 2014*

**Physics/Calc**

A ball is thrown vertically upward from a cliff with a speed of 20 ft/sec. The ball hits the ground at 140 ft/sec. How high is the cliff? v'+-32
*December 12, 2014*

**MATH!**

the cost of a midnight madness movie ticket, is reduced by 2/5 of the original cost, to a cost of 3/5c. which expression is equivalent to the new cost? A)c-3/5c B)1-3/5c C)1-2/5c D)c-2/5c
*December 10, 2014*

**Civics**

Good job
*December 8, 2014*

**Algebra**

A fuel storage tank has one supply pump and two identical outlet pumps. With one outlet pump running, the supply pump can increase the fuel level in the storage tank by 8450 gallons in 30 minutes. With both outlet pumps running, the supply pump can increase the fuel level in ...
*November 25, 2014*

**Chemistry**

How do I balance CuSO4 + NH3 + H2O = (NH4)2SO4 + Cu(NH3)4(OH)2 Thank you!!!
*November 24, 2014*

**English HELP!**

what is the answer?
*November 19, 2014*

**physics**

consider the 666 N weight held by two cables shown below. The left hand cable and tension 530 N and makes an angle of theta2 with the ceiling. The right hand cable had tension 390 N and makes an angle of theta1 with the ceiling. What is the angle theta1 which the right hand ...
*November 14, 2014*

**Math**

sin theta = 8/17 and theta is in the second quadrant. Find sin(2theta),cos(2theta),tan(2theta) exactly sin(2theta) cos(2theta) tan(2theta) sin(2theta) would it be 2 x (8/17) cos(2theta) would be 2 x (15/17) tan(2theta) would be 2 x (8/17 divided by 15/17) is this correct? I ...
*November 14, 2014*

**Math**

Hi! Could someone possibly help me solve this?; log2(x+4)=log2(x^2+2). For my answer, I got "All Real Numbers" or x=0 but I'm not sure if that's right. Thanks a bunch!
*November 12, 2014*

**Math**

Hi! Could someone possibly help me solve this?; log2(x+4)=log2(x^2+2). For my answer, I got "All Real Numbers" or x=0 but I'm not sure if that's right. Thanks a bunch! :)
*November 11, 2014*

**BTEC Level 3 Business**

I need to find out what information the finance and marketing departments need and use within a business.
*November 10, 2014*

**chemistry**

Nitrogen dioxide abstracts with water vapor to produce oxygen and ammonia gas. If 12.8 grams of nitrogen dioxide reacts with 5.00 liter of water vapor at 375 degrees celisus and 725 tore, how many grams of ammonia can be produced? Use an ice table.
*November 2, 2014*

**chemistry**

give the specific heat for aluminum is 0.900 J/g*c how much energy is required to raise 25.0 g of aluminum from 20.0 to 75.0
*November 2, 2014*

**Physics**

The colors we see when looking at an object depend on the _________. A) density of the object B) amplitude of the light we see C) frequency of the light we see D) mass of the object we are looking at I think it is A
*November 1, 2014*

**physics**

Due to friction with the Earth's atmosphere, a large static electric charge could build up on our plummeting asteroid fragment. Would you expect our fragment to generate a magnetic field? Explain why or why not.
*October 24, 2014*

**Language Arts**

Why does the author of "Always to Remember" discuss Maya Ying Lin's background? A. To show that she experienced hardships B. To appeal to Chinese-American readers C. To show its influence on her design D. To show her disintrest in architecture
*October 23, 2014*

**physics**

A rifle with a mass of 12 g, traveling with a speed of 425 m/s strikes a large wooden block, which it penetrates to a depth of 15 cm. determine the magnitude of the retarding force that acts on the bullet.
*October 22, 2014*

**math word problems**

PLEASE HELP MS SUE
*October 22, 2014*

**math word problems **

nilsa is working on a 60 minute math test. there are 20 questions on the test. if it takes her 20 minutes to complete 12 of the questions, what is the greatest amount of time on average she can spend on each of the remaining 8 questions.
*October 22, 2014*

**English**

I need to ask one question... Why Canada involved?
*October 21, 2014*

**English**

he federal government says Canada will start shipping its experimental Ebola vaccine to the World Health Organization on Monday. The government says in a release the Public Health Agency of Canada is supplying the vaccine to the UN body in Geneva in its role as the ...
*October 21, 2014*

**English**

It's like a format for answering short answer/essay questions g- general statement e- elaboration r- reference 1 r- reference 2 c- conclusion
*October 20, 2014*

**English**

I hope someone knows how to write a gerrc paragraph.. Anyways I need help for the reference part. Hence the word R, how do i show my point? I can explain the quote but I don't know the point. The general statement is, the author used a variety of humor to point the nature ...
*October 20, 2014*

**Algebra**

Using Cowling’s Rule what is the age of the child if the adults dose is 500mg and the child dose is 187 mg?
*October 17, 2014*

**Chemist - Grade 9 - Urgent.**

Predict the physical properties and relative reactivity of Ba and Sr Cs and Br ( elements from periodic table )
*October 16, 2014*