Wednesday

February 22, 2017
Total # Posts: 1,828

**algebra 1a**

12 + y -------- 36 + w

*January 31, 2013*

**Physics**

A crate of mass 59 kg is attached to one end of a string, and the other end of the string runs over a pulley and is held by a person as in the figure below. If the person pulls with a force of 94 N, what is the crate's acceleration?

*January 30, 2013*

**Math Homework**

In a clinical trial, a drug used to relieve pain caused side effects in 2% of the patients who took it. For a new trial, three patients were selected at random. Find the probability that all three of the patients had side effects

*January 30, 2013*

**Math**

Account numbers for Northern Oil Company consist of seven digits. If the first digit cannot be a 0 or 1, how many account numbers are possible?

*January 29, 2013*

**6 grade Math**

3 divided by 0.5 which is 6

*January 23, 2013*

**3rd grade math**

4

*January 23, 2013*

**math**

Alice is giving a book as a gift that is 8 3/8 inches long and 6 1/2 inches wide. Will the book fit in a box that is 8 1/2 inches long and 6 1/2 wid or in a box that is 8 inches long and 6 inches wide?

*January 14, 2013*

**physics**

sphere A has a mass of 4.2*10^-2 kg and is tethered to a wall by a thin thread. Sphere a has an excess of 1.2 *10^12 electrons. Sphere B has a deficit of 3.5*10^12 electrons and is o.23 m from sphere A a) determine the angle between the thread and the wall b) determine the ...

*January 13, 2013*

**math**

a farmer plant seeds in a field that is 125 meters length and 75 meters width. The seed must receive 1 liter per square meter every day and how many liters must farmer apply to the field every day?

*January 10, 2013*

**Math**

13/100

*January 8, 2013*

**geometry**

The Polygon Angle-Sum Theorem states the following: The sum of the measures of the angles of an n-gon is ____. (1 point) (n – 1)180o (n – 2)180o 9. What is the measure of one angle in a regular 16-gon? (1 point) 2,520o 202.5o 157.5o 78.75o 10. The measure of each ...

*December 31, 2012*

**calculus**

can someone please help me find all the zeros of the following polynomial. write the polynomial in factored form. f(x)=x^3-3x^2+16x-48 can you please show all work

*December 24, 2012*

**calculus**

how do I test the different regions??

*December 24, 2012*

**calculus**

solve the following inequality. write your solution in interval notation. x^3+9x^2-108 less than or equal to 0 please show all work

*December 24, 2012*

**Math**

A street is 282 m long is covered with snow. City workers are using a snowplow to clear the street. A tire on the snowplow has to turn 47 times in traveling the length of the street. What is the diameter of the tire?

*December 21, 2012*

**physics**

The coefficients of static and kinetic friction between a 50 kg box and a horizontal surface are 0.64 and 0.17, respectively. (a) What is the acceleration of the object if a 335 N horizontal force is applied to the box? m/s2 (b) What is the acceleration if the applied force is...

*December 18, 2012*

**Physics**

The coefficients of static and kinetic friction between a 50 kg box and a horizontal surface are 0.64 and 0.17, respectively. What is the acceleration of the object if a 335 N horizontal force is applied to the box?

*December 18, 2012*

**Math**

how do you change equivalent fractions with a common denominator

*December 12, 2012*

**math**

order the fractions from least to greatest 7/10 9/20 4/5

*December 12, 2012*

**physics**

a ball is thrown vertically upward at a speed of 45 m/s. how long does it take to return to the ground?

*December 11, 2012*

**physics**

A brother (mass 20 kg) and his big sister (mass 32 kg) want to play on a teeter-totter. The beam is 7 m long and has a mass of 41 kg. Suppose the brother sits at the end of his side, 3.5 m away from the pivot point. How far away from the pivot point does the sister need to ...

*December 10, 2012*

**Physics**

A 84 kg runningback is running at 3.5 m/s. The running back is met by 152 kg defensive lineman. If the collision between the runningback and the defensive lineman results in both coming to a stop, find the speed(absolute value) that the defensive lineman was moving at.

*December 10, 2012*

**Algebra Two**

Write the expression in simplified radical form. 2-2Square root 3 over 7+ square root 3

*December 7, 2012*

**Algebra 1**

4+9y-3>9y+6

*December 6, 2012*

**Math - percent of a #**

How do work this problem? 50% of what number is 46?

*December 6, 2012*

**Algebra 2 Rational Equations**

What is the solution set of the equation? I know the answer is {-1} I just don't know how to get there. X^2-16 x-3 --------- = ------- -1 (x+4)(x+2) (x+2)

*December 6, 2012*

**ap chem**

A calorimeter contains 20.0 of water at 12.5 . When 2.20 of (a substance with a molar mass of 59.0 ) is added, it dissolves via the reaction and the temperature of the solution increases to 27.5 . Calculate the enthalpy change, , for this reaction per mole of . Assume that the...

*December 3, 2012*

**Chemistry**

A propane stove burned 470. grams of propane and produced 625 milliliters of water. What is the % yield? C₃H₈+5O₂ -> 3CO₂+ 4H₂O

*November 29, 2012*

**English**

In class today we went over subordination an the different forms, but I'm still confused about subordination when it comes to the absolute and infinitive forms. How do you subordinate in these forms?

*November 28, 2012*

**precalculus**

Just plug in the height of 36 ft into the equation given for the height, then you can solve for t by subtracting 36, then dividing by 16, and square rooting your answer (make sure to take the positive square root).

*November 28, 2012*

**Math word problem**

10killograms

*November 28, 2012*

**math**

5/12 of my salary was spent on food, then I gave 3/7 of the remainder to my sister and had P856 left. How much did i spent for food? 4 units = ? 1 unit = ? food has 5 units = ? ?

*November 22, 2012*

**english**

I also agree with yours.

*November 18, 2012*

**Physics**

A baseball is thrown such that it is in the air for 4 seconds and lands 100 m away. Find the initial vertical and horizontal components of the baseball's velocity.

*November 14, 2012*

**Physics**

A bolt requires 15 Nm or torque to loosen it. How much force needs to be applied to a 20 cm long wrench to loosen the bolt? Assume the force is applied perpendicular to the handle of the wrench.

*November 14, 2012*

**Physics**

What is the orbital speed of a satellite of mass 490 kg in geostationary orbit?

*November 13, 2012*

**physics**

A crate of mass 96 kg is loaded onto the back of a flatbed truck. The coefficient of static friction between the box and the truck bed is 0.14. What is the smallest radius of curvature, R, the truck can take, if the speed with which it is going around a circle is 2.9 m/s?

*November 13, 2012*

**business math**

sorry henry but your wrong....

*November 12, 2012*

**math**

Hannah's grade on her last math test was 4 points more than Mark's grade. Write an expression for Hannah's grade, using m as a variable. Evaluate the expression if m=92.

*November 11, 2012*

**science**

how much skin covers 1 of your alveoli?

*November 11, 2012*

**English**

Correct

*November 11, 2012*

**Economics**

(This homework question was removed due to a copyright claim submitted by K12 Inc.)

*November 4, 2012*

**math**

My hundredths digit is the product of 3 x 2. My tenths digit is the multiple of 3 that comes before the digit that is in the hundredths place. My thousandths digit could not be any greater. What number am I?

*November 1, 2012*

**elementary**

nuber sense minnie has 6 county cds and 5 rock cds.amanda has 5 rock cds and 6 country cds.who has more cds?explain.

*October 31, 2012*

**elementary**

explain it jake says that adding 0 does not change a sum.is he correct?explain.

*October 31, 2012*

**elementary**

write your own sentence using the words: me

*October 30, 2012*

**English**

Identify whether the italicized words in the sentences below are used as participles or verbs. She’s an EXPERIENCED chef; she should have no trouble finding work. participle or verb? I would say participle.

*October 29, 2012*

**Math**

IM GONNA HELP BECAUSE I DID NOT TAKE NO HONOR CODE. 1D 2C 3D 4A 5A 6A 7C 8C

*October 29, 2012*

**PHYSICS!**

ok so waht oyu do is you find the pressure at the level the top is at which you would use P0+gh(density) then you use PA=F so for your problem it would be 1.013x10^5 +1000x.09x9.8=102182 102182x(.1)^2=1021.82 N for the top for the botom you would just add .12 to your origional...

*October 28, 2012*

**elementary**

Explain it sandy said she could use addition to answer question 1 how could this be done?

*October 25, 2012*

**elementary**

number sense fabio said that there are 3 times as many people on a basketball team as on a tennis team.is he correct?why or why not. tennis 2 players basketball 5 players

*October 25, 2012*

**College Chemistry**

Calculate the number of Joules released when 75.0 g of water are cooled from 100.0 degrees Celsius to 27.5 degrees Celsius

*October 25, 2012*

**Chemistry**

a certain first order decomposition reaction has a half-life of 15.0 minutes. What is the rate constant for this reaction? what is the time it will take for the reaction to reach the 10% completion point?

*October 24, 2012*

**Chemistry**

A solution of magnesium chloride, MgCl2, is prepared by dissolving 19.0g of MgCl2 in 250 mL OF water. a.) Calculate the weight percent of magnesium chloride in solution. b.)The denstiy of the above solution is 1.05 g/mL. Calculate the molarity of the magnesium chloride ...

*October 24, 2012*

**Chemistry**

The addition of a non-volatile, non-electrolyte will increase the amount of your vapor found above the solution over that of the pure liquid? (True or False)

*October 24, 2012*

**math**

Find the area of a walkway that goes around a rectangular swimming pool. The pool has a length of 30 feet and a width of 18 feet. The walkway has a width of 4 feet all around the pool.

*October 24, 2012*

**Physics**

For the first part of this question I got 12.12m/s B. With the help of a friend the boy measures the height to which the ball returns and finds it to be 5.2 meters. How fast was the ball moving when it left the ground? I wrote this down mass of ball: 0.40kg height if house: 7....

*October 23, 2012*

**Chemistry I**

In determining the heat capacity of a calorimeter, 50ml of water at 56*C is added to 50ml of water at 23*C. After about five minutes of mixing, the final temperature of the solution inside the calorimeter reached 37*C. Calculate the heat capacity of the calorimeter (J/*C-...

*October 22, 2012*

**Math**

3.4t+0.08=11

*October 22, 2012*

**Math**

-4b-5+2b=10

*October 22, 2012*

**Chemistry**

I titrated 0.25 grams of soda ash with 43.7 mL of HCl (0.115M) and 25 mL of H2O. I am getting over 100% sodium carbonate in my answer here are my steps that I took to get the answer can somebody help me see what I did wrong? mols HCl=(0.115M)x (0.0437L)=0.005 mol HCl 1/2 x (0....

*October 22, 2012*

**math**

Write a number sentence for the model. Let one white tile equal +1 and one black tile equal –1. A. –14 – (–6) = –8 B. 14 – 6 = 8 C. –14 – 6 = –8 D. –14 – (–6) = 8 i put d but it was rong

*October 22, 2012*

**math**

How do you round to the nearest millimetre tho...

*October 21, 2012*

**elementary**

use, using,eat,eating,close,moan,wave,writing,looking,dream,skate,closing,trading,cleaning,clean,write,skating,waving,look,mail,mailing. write these spelling words vowels&conosonents all spelling words are vowels.no consonents.are u correct

*October 17, 2012*

**math**

the turning point for y= x^2-8x+2 is: A (2,-16) B (16,2) C (8,-2) D (-8,2) E (4,-14)

*October 16, 2012*

**English**

Instead of telling us how much you >>repent<< your outrageous conduct why don't you sincerely try to reform? Regardless of what you may think proper I do not >>deem<< it necessary for someone of your age to wear an evening gown to the dance. The TV ...

*October 16, 2012*

**elementary**

explain it josh says that if he divides 50 by 5,he will get 10.jeff says he shhould get 9.who is correct?explain.

*October 16, 2012*

**elementary**

gabriella and 4 friends shared a pack of 15 glue sticks equally.how many giue sticks did each person get?

*October 16, 2012*

**3rd grade**

erica counted 45 fingers when the students were asked who wants to play kickball.how many hands went up?

*October 16, 2012*

**maths**

the turning point for y=x^2-8x+2 is: A: (2,-16) B: (16,2) C: (8,-2) D: (-8,2) E: (4,-14)

*October 16, 2012*

**maths**

for the graph y= -(x-2)squared +1: Find the x intercepts please show all working :)

*October 16, 2012*

**Chemistry**

1. For the reaction 2N2O(g) ⇋ O2(g) + 2N2(g), what happens to the equilibrium position if the pressure decreases? A. Shift to the right B. Shift to the left C. Doubles D. Does nothing E. Halves 2. if an equilibrium reaction shifts to the right when the system is cooled, ...

*October 16, 2012*

**elementary**

Draw an array. Then write a fact family to describe your array

*October 15, 2012*

**7th grade math pygorean theroem ms.sue correct**

always draw the diagrams out, it makes the question much more clearer and easier to understand. use the basic rule of C^2 = a^2 + b^2

*October 9, 2012*

**AP ECE Physics**

Don't use *just* the centripetal component for μ. The real equation is: μ = a / 9.8 Do sqrt(a_c^2 + a_t^2) to find the magnitude of a.

*October 9, 2012*

**Live Tutoring**

Does anyone know where I can get inexpensive online tutoring that will not cost me $30.00/hr?

*October 9, 2012*

**Trig help?**

are these functions periodic? i - y=abs(sin(x)) = sin(x) ii - y=cos(X^2) iii - y = cos(sin(x)) I am completely lost on these :/

*October 9, 2012*

**Chemistry**

The volume of a sample of ideal gas at 25*C is 372ml. What will be the volume of the gas if it is heated at constant pressure to 50*C? What will be the volume of the gas if it is cooled to -272*C?

*October 8, 2012*

**ELEMENTARY**

How to prepare PSAT test from 3rd grade

*October 8, 2012*

**6th grade math**

how many hours dose it take for a rino to run 158,400 feet

*October 1, 2012*

**Dr. Bob, help please**

does the density of an element have anything to do with the number of elections? i have to work with a partner and his reasoning is this: "the higher the atomic number, the greater the density because the atomic number is made up of protons so the more protons there are, ...

*October 1, 2012*

**physics**

hello, does the density of an element have anything to do with the number of elections? i have to work with a partner and his reasoning is this: "the higher the atomic number, the greater the density because the atomic number is made up of protons so the more protons ...

*September 30, 2012*

**physics**

hello, does the density of an element have anything to do with the number of elections? i have to work with a partner and his reasoning is this: "the higher the atomic number, the greater the density because the atomic number is made up of protons so the more protons ...

*September 30, 2012*

**Calc 3**

In other words, divide the plane's normal vector so that the y components match (INCLUDING SIGN), then solve for the two remaining variables. For the example above this would mean; 2xi-j+2zk=7i+2j+3k becomes 2xi-j+2xk=(-7/2)i-j+(-3/2)k Now solve for x and z like so: 2x=(-7...

*September 27, 2012*

**physics (graphs)**

Hi, i'm doing a graph for density of an element as a function of atomic number. i'm trying to calculate the slope and it's asking me to include units. if density as a unit: g/cm^3, how would i write the units of the slope? which is basically density over atomic ...

*September 26, 2012*

**Social studies**

How were the ideas of Louis XIV and Philip II similar? How were they different?

*September 26, 2012*

**Social studies**

How were the ideas of Louis XIV and Philip II similar? How were they different?

*September 26, 2012*

**Social studies**

How were the ideas of Louis XIV similar? How were they different?

*September 26, 2012*

**algebra**

How do I use the distributive property to write (e+f)(-5) as an equivalent algebraic expression?

*September 25, 2012*

**Physics**

A gull is flying horizontally 8.17 m above the ground at 6.35 m/s. The bird is carrying a clam in its beak and plans to crack the clamshell by dropping it on some rocks below. Ignoring air resistance, what is the horizontal distance to the rocks at the moment that the gull ...

*September 20, 2012*

**Math**

the rectangle is 6.1 wide and 3cm high

*September 19, 2012*

**Math**

how could you use point I to estimate the midpoint of each side of the rectangle?

*September 19, 2012*

**Nutrition**

what is a vegetarian example of a complete protein?

*September 17, 2012*

**nutrition**

What is the role of amino acids in building protein?

*September 17, 2012*

**Chemistry**

Calculate the pressure and temperature at which 1.00 mole of CO gas will be in the same corresponding state as 1.00 mole of H2 gas at 2.00 bar and 30.0 degrees celsius. How do I approach this question?

*September 15, 2012*

**math**

divide 4 by x squared and write it in the form of axb where a and b are rational constants

*September 15, 2012*

**math**

A. 1,3,6,10,___,___ B. 1, 1/2, 1/4, 1/8,___,___ C. 1,3,9,27,___,___ D. 8,7,5,2,___,___ E. 49,47,52,50,55,___,___

*September 15, 2012*

**Physics**

A car slams on its brakes. When it slammed on its brakes, it was decelerating at 6 m per sec per sec. How high would the car have to fall from to have the same force?

*September 13, 2012*

**Maths**

f (x) = x2 - 4/ x2 - 1 This needs to be plotted onto a graph, but I don't know how

*September 12, 2012*